Category: Concrete Factors

Concrete is strong and durable but achieving a quality finish takes more than pouring and waiting for it to set.

Air pockets can form in concrete slabs, foundations, driveways, and bases. These pockets cause imperfections and can affect long-term performance.

Next, we’ll take a closer look at why air pockets in concrete form, how serious they can be, and what steps to take to avoid them.

✅ Order ready-mix or volumetric concrete today
✅ Free, fast quote within 24 hours
✅ Call, message or complete our simple online form

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

What Are Air Pockets?

Air pockets in concrete are small voids or gaps that become trapped during the pouring and curing process. Some air pockets appear as small surface holes, while others form deeper inside as larger voids called honeycombing.

Small air pockets on the surface are common, especially in exposed concrete. Larger pockets or voids, however, can weaken the structure if not addressed.

What Causes Air Pockets in Concrete?

Poor Concrete Placement

Pouring concrete unevenly or too quickly can trap air beneath layers of concrete, especially in deep pours or complex formwork. Concrete needs to flow properly into every corner of the pour to minimise the risk of trapped air.

Insufficient Compaction

A common cause of air pockets is inadequate compaction. Fresh concrete naturally traps air, which should be removed during placement.

Using The Wrong Concrete Mix

A mix that is too stiff or not workable won’t flow well around reinforcement or tight spaces, which increases the chance of air being trapped during pouring.

Reinforcement And Obstructions

Steel reinforcement, mesh, and other embedded materials can block concrete flow.

Without proper placement and compaction, these obstacles may cause voids.

Pouring Too Quickly

Rushing a concrete pour can cause problems. Pouring too much concrete too quickly traps air between layers before it escapes.

Need Expert Advice?

Speak to the team at Flowmix Tewkesbury, Gloucestershire or Aldridge, Walsall. We are happy to help with all your concrete requirements. Contact us by email or telephone.

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Why Are Air Pockets A Problem?

The answer depends on their size and location.

• Cosmetic Imperfections: Small surface air holes are often nothing more than a visual issue. They may affect the appearance of decorative or exposed concrete but generally have little impact on strength.
• Reduced Durability: Larger voids can allow water to penetrate the concrete more easily. Over time, this can increase the risk of cracking, freeze-thaw damage and premature deterioration, particularly in external applications.
• Structural Concerns: Large internal voids can reduce concrete strength and load-bearing capacity. In structural applications, these defects should always be assessed and repaired where necessary.

How To Prevent Air Pockets in Concrete

Most air pockets are preventable with proper preparation and installation.

#1: Choose The Correct Concrete Mix

Selecting the right concrete for your project is essential. A mix with good workability flows easily around reinforcement and into tight areas, reducing trapped air.

#2: Pour Carefully

Place concrete steadily and evenly across the area and avoid high drops, which can separate the mix and increase air entrapment.

#3: Compact Properly

Compaction is one of the most effective ways to remove trapped air. Depending on the job, use vibration or tamping to consolidate concrete and remove voids.

#4: Work Methodically

Maintaining a consistent pouring process helps prevent air from becoming trapped between layers. Careful planning and skilled installation improve results.

#5: Use A Reliable Concrete Supplier

Quality concrete starts with a dependable supplier. Consistent batching, quality materials, and expert input ensure the concrete performs as needed on-site. Flowmix holds the BSA-approved Ready-Mix Concrete Kitemark KM683844.

✅ Order ready-mix or volumetric concrete today
✅ Free, fast quote within 24 hours
✅ Call, message or complete our simple online form

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

How Mix On-Site Concrete Can Help

Mix-on-site concrete offers several advantages for achieving the right consistency and reducing the risk of air pockets.

With on-site production, you can adjust concrete to fit changing conditions. It can give contractors greater control throughout the pour and can help achieve a better overall finish.

Can Air Pockets Be Repaired?

In many cases, yes. It’s possible to repair small surface defects by using specialist patching compounds (materials used to fill holes) or repair mortars (pre-mixed blends of cement and sand used for fixes).

More significant voids may require grouting (injecting fluid materials to fill gaps) or professional remedial work, particularly where structural performance could be affected.

If you’re unsure whether an air pocket is cosmetic or something more serious, it’s always worth seeking professional advice.

Conclusion

Air pockets in concrete are common, but with proper mix, placement, and compaction, they’re often avoidable.

Whether you’re pouring a driveway, foundation, slab or commercial concrete base, taking the time to plan the installation properly can help ensure a stronger, more durable result.

How Flowmix Can Help with Your Project

Flowmix has two plants, Gloucester and Walsall. We provide the following services (with time slots):

✅ Ready-mix concrete, mix on-site (volumetric concrete)
✅ Traditional and liquid screed.
✅ Concrete line pump Hire to reduce manual labour and associated costs, increase efficiency, reduce wastage and clean up.
✅ Interlocking concrete blocks for temporary or permanent barriers.
✅ Mini-Mix loads up to 4 cubic metres.

Flowmix holds the BSA-approved Ready Mix Concrete Kitemark KM683844, a certification that “confirms a product or service’s claim has been independently and repeatedly tested by experts” (source BSI).

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Flowmix Delivery Areas

Tewkesbury	Walsall Plant
Bourton-on-the-Water	Aldridge
Brockworth	Barton-Under-Needwood
Chalford	Birmingham
Cheltenham	Brownhills
Chipping Campden	Burntwood
Cirencester	Burton Upon Trent
Droitwich Spa	Cannock
Evesham	Coleshill
Gloucester	Dudley
Great Malvern	Great Haywood
Ledbury	Lichfield
Newent	Norton Canes
Northleach	Penkridge
Pershore	Rugeley
Ross-on-Wye	Stafford
Stow-on-the-Wold	Tamworth
Stroud	Walsall
Tewkesbury	West Bromwich
Worcester	Wolverhampton

Concrete curing often seems like a mystery, but it’s not complicated.

Whether you’re installing a driveway, laying foundations, or pouring a slab, proper concrete curing ensures its strength and durability, so it performs for years.

To help you get the most from your project, this guide will outline effective techniques for concrete curing.

✅ Order ready-mix or volumetric concrete today
✅ Free, fast quote within 24 hours
✅ Call, message or complete our simple online form

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

What Is Concrete Curing?

Concrete curing is the process of maintaining adequate moisture and temperature levels within freshly poured concrete to allow it to gain strength properly.

Concrete gains strength through hydration. For curing, sufficient moisture is needed in the early stages.

If concrete dries too quickly, hydration slows or stops, causing weaker concrete and defects.

Why Is Concrete Curing Important?

Proper curing is essential because concrete strengthens over several weeks. Curing maximises this process for a reliable result. Proper curing helps reduce the risks of cracking, improves durability and ensures a better surface finish.

How Long Does the Curing Process Take?

One of the most common questions people ask is how long it takes concrete to cure. The cure time varies, but general milestones help assess progress.

• Initial Setting: Fresh concrete will usually begin to set within a few hours of placement. During this stage, it’s important to protect the surface from disturbance, excessive moisture loss and extreme weather conditions.
• First 24 to 48 Hours: The first couple of days are critical for strength development. Concrete should be protected and kept moist where appropriate to support hydration.
• After Seven Days: Under normal conditions, concrete typically reaches about 70% of its intended strength within the first week. That is why many construction activities can continue after seven days, although the concrete is not yet fully cured.
• After Twenty-Eight Days: The 28-day mark is widely recognised within the construction industry as the point at which concrete reaches its specified design strength.

However, concrete can continue to gain strength beyond this period under suitable conditions.

Need Expert Advice?

Speak to the team at Flowmix Tewkesbury, Gloucestershire or Aldridge, Walsall. We are happy to help with all your concrete requirements. Contact us by email or telephone.

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Factors That Affect Concrete Curing

The following can influence how quickly and effectively concrete cures.

• Hot Weather: Heat accelerates moisture evaporation, which increases the risk of shrinkage and weaker concrete.
• Cold Weather: The cold slows hydration, and freezing can damage fresh concrete.
• Wind and Low Humidity: Wind accelerates moisture loss, especially on large slabs.
• Concrete Mix Design: Cement, water, and admixtures influence performance.
• Concrete Thickness: Thicker slabs naturally retain moisture better than thinner slabs.

Common Concrete Curing Methods

Several methods successfully cure concrete, including spraying or misting, using plastic sheeting, wet covers or blankets and applying curing compounds that form a protective membrane.

Concrete Curing Tips for Driveways, Patios & Slabs

If you’re planning a domestic or commercial concrete project, these simple tips can help improve results.

Avoid foot traffic early. Concrete looks hard after 24 hours, but strength develops beneath the surface.

On warm days, use methods that retain moisture and slow drying.

Monitor the weather before and after pouring. Extreme heat, wind, rain, and frost affect curing. It’s best to seek professional advice; Flowmix can guide you on the best times and conditions for pouring.

Conclusion

Concrete curing may not be the most visible stage of a construction project, but it’s one of the most important.

Allowing concrete to cure helps maximise strength, minimise cracking, and improve long-term durability. Whether installing a driveway, laying foundations, or pouring a commercial slab, giving proper attention to curing significantly affects the finished result.

Flowmix supplies high-quality ready-mix and mix-on-site concrete throughout Gloucestershire and the West Midlands. If you’d like advice on selecting the right concrete for your next project, our experienced team is always happy to help.

How Flowmix Can Help with Your Project

Flowmix has two plants, Gloucester and Walsall. We provide the following services (with time slots):

✅ Ready-mix concrete, mix on-site (volumetric concrete)
✅ Traditional and liquid screed.
✅ Concrete line pump Hire to reduce manual labour and associated costs, increase efficiency, reduce wastage and clean up.
✅ Interlocking concrete blocks for temporary or permanent barriers.
✅ Mini-Mix loads up to 4 cubic metres.

Flowmix holds the BSA-approved Ready Mix Concrete Kitemark KM683844, a certification that “confirms a product or service’s claim has been independently and repeatedly tested by experts” (source BSI).

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Flowmix Delivery Areas

Tewkesbury	Walsall Plant
Bourton-on-the-Water	Aldridge
Brockworth	Barton-Under-Needwood
Chalford	Birmingham
Cheltenham	Brownhills
Chipping Campden	Burntwood
Cirencester	Burton Upon Trent
Droitwich Spa	Cannock
Evesham	Coleshill
Gloucester	Dudley
Great Malvern	Great Haywood
Ledbury	Lichfield
Newent	Norton Canes
Northleach	Penkridge
Pershore	Rugeley
Ross-on-Wye	Stafford
Stow-on-the-Wold	Tamworth
Stroud	Walsall
Tewkesbury	West Bromwich
Worcester	Wolverhampton

When building foundations for a house extension, retaining wall, commercial building or other structure, one question often arises: do you need rebar concrete footings?

Concrete is a strong material, but it’s less resistant to tensile forces, which can cause cracking and movement over time. This is where steel reinforcement, commonly known as rebar, comes into play.

Understanding when rebar concrete footings are required can help ensure your foundations remain strong and stable, supporting loads placed upon them for many years to come.

✅ Order ready-mix or volumetric concrete today
✅ Free, fast quote within 24 hours
✅ Call, message or complete our simple online form

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

What Is Rebar and Why Is It Used in Concrete Footings?

Rebar, short for reinforcing bar, is a steel bar or mesh placed within concrete before it is poured. The purpose of rebar is to strengthen the concrete and improve its ability to withstand tension, bending and ground movement.

Concrete provides excellent compressive strength, while steel reinforcement provides tensile strength. That helps create a solid foundation capable of handling greater loads.

For many projects, rebar concrete footings provide additional structural security and long-term durability.

When Are Rebar Concrete Footings Required?

The need for reinforcement depends on several factors, including the size of the structure, soil conditions and foundation design.

#1: Heavy Structural Loads

Structures that place significant weight on foundations often require reinforced footings, such as retaining walls, house extensions, new-build homes, industrial structures and commercial buildings. Rebar concrete footings help distribute loads evenly and reduce the risk of structural movement.

#2: Poor Ground Conditions

Not all ground conditions provide ideal support for foundations.

Reinforcement may be recommended where ground movement is more likely, such as clay soils, made-up or filled ground, areas prone to settlement and sites with varying soil conditions.

#3: Wide Or Deep Foundations

If a site requires wide or deep foundations, reinforcement improves strength and ensures the footing performs as intended.

#4: Structural Engineer Specifications

Many larger residential and commercial projects involve foundation designs prepared by a structural engineer.

If reinforcement is specified in the design, rebar concrete footings must be installed in accordance with the engineer’s drawings and Building Control requirements.

Need Expert Advice?

Speak to the team at Flowmix Tewkesbury, Gloucestershire or Aldridge, Walsall. We are happy to help with all your concrete requirements. Contact us by email or telephone.

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

When Rebar May Not Be Necessary

Not every foundation requires steel reinforcement. In some cases, plain concrete footings may be sufficient, particularly for:

• Small garden walls
• Lightweight sheds
• Minor landscaping structures
• Projects built on stable ground conditions

However, the suitability of traditional concrete should always be confirmed by the project designer, the structural engineer, or the Building Control officer.

Common Mistakes When Installing Rebar Concrete Footings

Correct installation is just as important as using reinforcement in the first place.

• Placing Rebar Directly on the Ground: Rebar should be supported with suitable spacers or chairs to ensure it sits within the concrete rather than resting on the soil.
• Insufficient Concrete Cover: Steel reinforcement requires adequate concrete cover to protect it from moisture and corrosion.
• If rebar is too close to the surface, it may rust over time, potentially weakening the foundation.
• Incorrect Spacing:Reinforcement must be spaced according to the design specifications. Incorrect spacing can reduce the effectiveness of the reinforcement and compromise structural performance.
• Poorly Secured Reinforcement: Rebar should be properly tied and secured before concrete is poured to prevent movement during placement.
• Using Inconsistent Concrete:The quality of the concrete itself is critical. Variations in mix quality can affect strength, durability and overall performance.

Building Regulations and Reinforced Foundations

Building Regulations do not automatically require all foundations to contain reinforcement.

The need for rebar concrete footings depends on:

• Structural loads
• Ground conditions
• Foundation dimensions
• Engineer specifications
• Building Control requirements

Before starting any project, it is important to ensure the foundation design complies with current regulations and any recommendations provided by your structural engineer.

Conclusion

Rebar concrete footings provide valuable additional strength, stability and durability for many construction projects. Although not all footings require reinforcement, structures subjected to heavy loads and challenging ground conditions often benefit from reinforced concrete.

By combining correctly installed reinforcement with high-quality ready-mix concrete, you can create foundations built to perform for decades.

If you’re planning a residential, commercial or industrial project, Flowmix can supply reliable ready-mix concrete and concrete pumping services to help ensure your foundations are built on solid ground.

How Flowmix Can Help with Your Project

Flowmix has two plants, Gloucester and Walsall. We provide the following services (with time slots):

✅ Ready-mix concrete, mix on-site (volumetric concrete)
✅ Traditional and liquid screed.
✅ Concrete line pump Hire to reduce manual labour and associated costs, increase efficiency, reduce wastage and clean up.
✅ Interlocking concrete blocks for temporary or permanent barriers.
✅ Mini-Mix loads up to 4 cubic metres.

Flowmix holds the BSA-approved Ready Mix Concrete Kitemark KM683844, a certification that “confirms a product or service’s claim has been independently and repeatedly tested by experts” (source BSI).

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Flowmix Delivery Areas

Tewkesbury	Walsall Plant
Bourton-on-the-Water	Aldridge
Brockworth	Barton-Under-Needwood
Chalford	Birmingham
Cheltenham	Brownhills
Chipping Campden	Burntwood
Cirencester	Burton Upon Trent
Droitwich Spa	Cannock
Evesham	Coleshill
Gloucester	Dudley
Great Malvern	Great Haywood
Ledbury	Lichfield
Newent	Norton Canes
Northleach	Penkridge
Pershore	Rugeley
Ross-on-Wye	Stafford
Stow-on-the-Wold	Tamworth
Stroud	Walsall
Tewkesbury	West Bromwich
Worcester	Wolverhampton

Concrete is only as strong as the surface beneath it. No matter how good the concrete mix is, poor ground preparation can lead to cracking, sinking and long-term structural problems. Whether the project involves a driveway, foundation, farmyard, or commercial slab, properly preparing the ground before pouring concrete is one of the most important stages of the entire process.

Ground preparation helps create a stable base that supports concrete evenly and improves durability over time. Skipping this stage or rushing can lead to costly problems later.

✅ Order ready-mix or volumetric concrete today
✅ Free, fast quote within 24 hours
✅ Call, message or complete our simple online form

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Here are seven reasons why proper preparation matters before pouring concrete.

#1: It Creates a Stable Foundation

Concrete needs a firm, compact and stable surface underneath it. If the ground is soft, uneven or poorly compacted, the concrete may begin to shift or sink after installation.

A stable sub-base helps distribute weight evenly across the slab, reducing movement and improving long-term strength. This is especially important in areas exposed to vehicle traffic or heavy loads.

#2: It Helps Prevent Cracking

Cracking is one of the most common concrete problems, and poor ground preparation is often a major cause.

If the ground beneath the slab settles unevenly after the concrete has been poured, pressure points can develop within the slab. Over time, this movement may lead to cracks appearing on the surface.

Proper excavation, levelling and compaction help reduce the risk of movement beneath the concrete.

#3: Improved Drainage

Water is one of the biggest threats to concrete performance. Without proper drainage, water can collect underneath or around the slab, weakening the ground and increasing the risk of movement.

Ground preparation often includes grading and drainage planning to help direct water away from the concrete surface.

Effective drainage extends the lifespan of concrete and reduces future maintenance issues.

#4: Supporting Heavy Loads More Effectively

Concrete surfaces must withstand loads from vehicles, machinery, or equipment. If the ground isn’t properly prepared, the slab may struggle to stay stable.

A properly compacted base helps support vehicles, industrial equipment and more.

The heavier the intended use, the more important it is to properly prepare the ground before pouring concrete.

Need Expert Advice?

Speak to the team at Flowmix Tewkesbury, Gloucestershire or Aldridge, Walsall. We are happy to help with all your concrete requirements. Contact us by email or telephone.

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

#5: It Helps Achieve a More Level Finish

Uneven ground can affect the final appearance and performance of the concrete. Poor preparation may result in sloped, uneven surfaces or low spots where water collects.

Taking time to properly level and prepare the site helps create a smoother, more professional finish once the concrete is poured.

This is particularly important for projects such as:

• Garage floors
• Warehouse slabs
• Driveways
• Shed bases
• Commercial flooring

#6: Reduced Risk of Future Repairs

Poor preparation can result in costly repair work later. Concrete repairs often involve breaking out damaged sections and replacing them completely, which can become expensive and disruptive.

Preparing the ground correctly from the beginning helps minimise the risk of:

• Settlement
• Uneven slabs
• Premature wear
• Surface cracking
• Drainage problems

Investing time in preparation can save considerable money and inconvenience in the future.

#7: Improved Overall Lifespan of the Concrete

Concrete is designed to last for many years, but its longevity depends heavily on the quality of the installation process. A strong sub-base helps the concrete maintain its strength and performance under changing weather conditions and regular use.

Whether the project is domestic, agricultural or commercial, proper preparation plays a major role in helping concrete surfaces remain durable over the long term.

✅ Order ready-mix or volumetric concrete today
✅ Free, fast quote within 24 hours
✅ Call, message or complete our simple online form

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

What Does Ground Preparation Usually Involve?

The ground preparation process can vary depending on the project, but commonly includes:

• Excavating unsuitable ground
• Removing vegetation and debris
• Levelling the area
• Installing a sub-base
• Compacting the ground
• Planning drainage
• Adding reinforcement if required

Each stage helps create the right conditions before pouring concrete.

Conclusion

Ground preparation is one of the most important parts of any concrete project. A properly prepared base helps improve strength, reduce cracking, support heavy loads and extend the lifespan of the finished surface.

Before pouring concrete, taking the time to properly prepare the ground can make a significant difference in the long-term performance and durability of the project.

How Flowmix Can Help with Your Project

Flowmix has two plants, Gloucester and Walsall. We provide the following services (with time slots):

✅ Ready-mix concrete, mix on-site (volumetric concrete)
✅ Traditional and liquid screed.
✅ Concrete line pump Hire to reduce manual labour and associated costs, increase efficiency, reduce wastage and clean up.
✅ Interlocking concrete blocks for temporary or permanent barriers.
✅ Mini-Mix loads up to 4 cubic metres.

Flowmix holds the BSA-approved Ready Mix Concrete Kitemark KM683844, a certification that “confirms a product or service’s claim has been independently and repeatedly tested by experts” (source BSI).

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Flowmix Delivery Areas

Tewkesbury	Walsall Plant
Bourton-on-the-Water	Aldridge
Brockworth	Barton-Under-Needwood
Chalford	Birmingham
Cheltenham	Brownhills
Chipping Campden	Burntwood
Cirencester	Burton Upon Trent
Droitwich Spa	Cannock
Evesham	Coleshill
Gloucester	Dudley
Great Malvern	Great Haywood
Ledbury	Lichfield
Newent	Norton Canes
Northleach	Penkridge
Pershore	Rugeley
Ross-on-Wye	Stafford
Stow-on-the-Wold	Tamworth
Stroud	Walsall
Tewkesbury	West Bromwich
Worcester	Wolverhampton

Concrete pouring in hot weather can create serious challenges if the job is not properly planned. While warm conditions may seem ideal for construction work, high temperatures, direct sunlight and strong winds can all affect how concrete performs during and after pouring.

Whether you are working on a driveway, extension, foundation or commercial project, understanding the risks of concrete pouring in hot weather is essential for achieving a strong, durable finish.

Flowmix supplies concrete year-round, but during the summer months, it’s important to understand how to prepare, time, and cure your concrete.

✅ Order ready-mix or volumetric concrete today
✅ Free, fast quote within 24 hours
✅ Call, message or complete our simple online form

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Why Is Concrete Pouring in Hot Weather a Problem?

One of the biggest issues with concrete pouring in hot weather is that moisture evaporates much more quickly than in cooler weather. Concrete relies on controlled hydration to gain strength, so when water disappears too quickly, the concrete can dry unevenly and become weaker.

Concrete pouring in hot weather can lead to:

• Poor finishing
• Uneven curing
• Surface cracking
• Reduced strength
• Shrinkage problems
• Dusty or flaky surfaces

Even in the UK, temperatures do not need to be extreme for problems to occur. Strong sunshine, dry air and warm ground conditions can all impact the quality of freshly poured concrete. That said, as we’ve seen temperatures rise above 30℃ in the last few years, knowing these concrete-pouring mistakes can help ensure you get the best results long-term.

Common Mistakes During Concrete Pouring in Hot Weather

#1: Pouring During Peak Heat

One of the most common mistakes with concrete pouring in hot weather is scheduling work during the hottest part of the day. Midday temperatures and direct sunlight can dramatically speed up the setting process.

Early morning or late afternoon pours are usually far safer and easier to manage.

#2: Adding Too Much Water

When concrete starts to cure quickly, some people try to make it more workable by adding extra water. Unfortunately, this weakens the mix and can increase the risk of cracking and surface damage.

Professional concrete pouring in hot weather requires a properly designed mix from the start.

#3: Poor Site Preparation

Dry ground can absorb moisture from fresh concrete very quickly. Dampening the sub-base beforehand can help reduce rapid moisture loss and improve curing conditions.

#4: Delays During Placement

Concrete pouring in hot weather leaves less time for handling and finishing. Delays on site can result in concrete beginning to set before it has been properly levelled or compacted.

Tips for Successful Concrete Pouring in Hot Weather

There are several ways to reduce problems and achieve better results during concrete pouring in hot weather.

Plan the Timing Carefully

It’s best to avoid pouring concrete during the hottest hours whenever possible. Cooler temperatures help slow evaporation and provide more working time. Flowmix provides a 2-hour timed delivery slot, so you can time the pour with some precision.

Use the Correct Concrete Mix

Different projects require different concrete strengths and additives. Using the correct mix for concrete pouring in hot weather can improve workability and reduce the risk of rapid drying.

Prepare Everything in Advance

Before the concrete arrives, make sure:

• Access is clear
• Tools are ready
• Labour is organised
• Formwork is complete

Fast placement is extremely important during concrete pouring in hot weather.

Cure the Concrete Properly

Curing is one of the most important stages of any concrete project. Fresh concrete should be protected from excessive heat and moisture loss.

Common curing methods include:

• Plastic sheeting
• Water spraying
• Damp coverings
• Curing compounds

Proper curing helps concrete gain strength gradually and reduces cracking.

Consider Hiring a Concrete Line Pump

Concrete pumping can be extremely beneficial during concrete pouring in hot weather because it speeds up placement and reduces delays.

Instead of moving concrete manually across the site, pumping delivers it quickly and directly to the site pour. That improves efficiency and reduces the time the concrete is exposed to heat before finishing.

✅ Order ready-mix or volumetric concrete today
✅ Free, fast quote within 24 hours
✅ Call, message or complete our simple online form

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Professional Concrete Supply Matters

Experienced suppliers understand the challenges of concrete pouring in hot weather and can help ensure the correct mix and delivery timing for your project.

Flowmix supplies high-quality ready mix and volumetric concrete for domestic and commercial projects across Gloucestershire and the West Midlands.

Our team can advise on the best approach for concrete pouring in hot weather to help reduce delays and improve results.

Conclusion

Concrete pouring in hot weather requires careful planning, fast placement and proper curing techniques. Without proper preparation, excessive heat can lead to cracking, reduced strength, and long-term durability issues.

By using the correct concrete mix, avoiding peak temperatures and working with experienced suppliers, concrete pouring in hot weather can still produce strong, reliable and long-lasting results.

How Flowmix Can Help with Your Project

Flowmix has two plants, Gloucester and Walsall. We provide the following services (with time slots):

✅ Ready-mix concrete, mix on-site (volumetric concrete)
✅ Traditional and liquid screed.
✅ Concrete line pump Hire to reduce manual labour and associated costs, increase efficiency, reduce wastage and clean up.
✅ Interlocking concrete blocks for temporary or permanent barriers.
✅ Mini-Mix loads up to 4 cubic metres.

Flowmix holds the BSA-approved Ready Mix Concrete Kitemark KM683844, a certification that “confirms a product or service’s claim has been independently and repeatedly tested by experts” (source BSI).

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Flowmix Delivery Areas

Tewkesbury	Walsall Plant
Bourton-on-the-Water	Aldridge
Brockworth	Barton-Under-Needwood
Chalford	Birmingham
Cheltenham	Brownhills
Chipping Campden	Burntwood
Cirencester	Burton Upon Trent
Droitwich Spa	Cannock
Evesham	Coleshill
Gloucester	Dudley
Great Malvern	Great Haywood
Ledbury	Lichfield
Newent	Norton Canes
Northleach	Penkridge
Pershore	Rugeley
Ross-on-Wye	Stafford
Stow-on-the-Wold	Tamworth
Stroud	Walsall
Tewkesbury	West Bromwich
Worcester	Wolverhampton

Soil testing is a critical step in construction that is frequently undervalued. The emphasis often rests on materials and finishes, yet the true foundation of success lies beneath the surface.

If there is an issue with the ground, no amount of high-quality concrete will fix it later.

Whether you’re a builder, developer, or managing a commercial project, testing the soil is what gives you confidence that what you’re building will last.

What Is Soil Testing?

Soil testing is simply analysing the ground before construction begins. Samples are taken from the site and tested to understand things like:

• The strength of the soil
• How much weight the ground can safely support
• Moisture levels and drainage behaviour
• Whether there are contaminants present

Without proper soil testing, you’re essentially working blind. And in construction, that’s where problems may start.

Need Expert Advice?

Speak to the team at Flowmix Tewkesbury, Gloucestershire or Aldridge, Walsall. We are happy to help with all your concrete requirements. Contact us by email or telephone.

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Why Testing the Soil is the First Step

Before pouring concrete, designing foundations, and ordering materials, soil testing should already be done.

Testing the soil removes guesswork. It tells you exactly what you’re dealing with, so you can plan properly from the start instead of reacting halfway through a project.

Fixing issues early is faster and more cost-effective than solving problems mid-project.

The Risks of Skipping Soil Testing

Skipping soil testing to save time or money often backfires.

• Unexpected Costs: Hidden ground issues can lead to additional excavation, specialist disposal and foundation design changes
• Structural Problems: Weak or unstable ground can cause foundation movement, cracking concrete and long-term structural damage
• Health and Safety Risks: If the land is contaminated, strict regulations govern its handling. Without soil testing, you may not even know there’s a problem until it’s too late.

Understanding Ground Conditions and Contamination

A site might look stable on the surface, but hide issues below. Soil testing can identify contaminated land from previous industrial use.

For instance, you might discover sulphate levels that affect concrete durability, or poor load-bearing soil that needs reinforcement.

It’s vital on brownfield or reused sites, where ground conditions are unpredictable.

How Soil Testing Affects Concrete and Foundations

The results of soil testing will influence the type of foundation you use, the depth of footings, and the concrete mix best suited to the conditions.

For example, if sulphates are present in the ground, standard concrete may not be suitable. In those cases, a specialist mix such as sulphate-resistant concrete is often required to prevent long-term damage.

Waste Classification and Disposal

Excavated soil, once it’s removed, becomes classified waste.

Soil testing determines:

• If it needs to be treated
• Whether the material can be reused on-site
• Or if it must be disposed of under strict regulations

Correct soil classification helps you stay compliant and avoid unnecessary disposal costs.

Supporting Sustainable Construction

Sustainability is a fundamental consideration in construction.

With proper soil testing, materials can often be reused safely rather than sent to a landfill. That helps reduce waste, cut transport costs, and supports more environmentally responsible construction practices.

Common Types of Soil Testing

Typical soil testing may include:

• Moisture content testing to assess drainage and stability
• Compaction testing, to ensure the soil is properly prepared
• Contamination testing, to identify any hazardous substances
• Bearing capacity testing, to determine how much load the ground can support

Each test plays a role in making sure your site is ready to build on.

When is the Best Time to do Soil Testing?

Ideally, soil testing is best carried out as soon as possible before:

• Groundworks begin
• Foundations are designed
• The concrete mix is specified or poured

The sooner you know ground conditions, the smoother your project will be.

Why Testing Soil Matters for Commercial Projects

On commercial builds, there’s even more at stake. Timelines are tighter, budgets are larger, and expectations are higher.

Testing the soil helps:

• Keep projects on schedule
• Avoid costly surprises
• Ensure compliance with regulations

Soil testing is not just a precaution; it is a critical component of professional, efficient project management.

Conclusion

Cutting corners on soil tests saves time initially, but can cost more in the long term.

When you understand your ground conditions, you make better decisions. Better decisions lead to stronger foundations, smoother builds, and more reliable results.

Ultimately, the best concrete relies on a solid base.

How Flowmix Can Help with Your Project

Flowmix has two plants, Gloucester and Walsall. We provide the following services (with time slots):

✅ Ready-mix concrete, mix on-site (volumetric concrete)
✅ Traditional and liquid screed.
✅ Concrete line pump Hire to reduce manual labour and associated costs, increase efficiency, reduce wastage and clean up.
✅ Interlocking concrete blocks for temporary or permanent barriers.
✅ Mini-Mix loads up to 4 cubic metres.

Flowmix holds the BSA-approved Ready Mix Concrete Kitemark KM683844, a certification that “confirms a product or service’s claim has been independently and repeatedly tested by experts” (source BSI).

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Flowmix Delivery Areas

Tewkesbury	Walsall Plant
Bourton-on-the-Water	Aldridge
Brockworth	Barton-Under-Needwood
Chalford	Birmingham
Cheltenham	Brownhills
Chipping Campden	Burntwood
Cirencester	Burton Upon Trent
Droitwich Spa	Cannock
Evesham	Coleshill
Gloucester	Dudley
Great Malvern	Great Haywood
Ledbury	Lichfield
Newent	Norton Canes
Northleach	Penkridge
Pershore	Rugeley
Ross-on-Wye	Stafford
Stow-on-the-Wold	Tamworth
Stroud	Walsall
Tewkesbury	West Bromwich
Worcester	Wolverhampton

If you’ve ever ordered concrete for a project, you’ll know how many variables there are. Quantities, timing, access, changing conditions on site, it all adds up. That’s why more builders, developers and homeowners are turning to volumetric concrete.

So, what exactly is volumetric concrete, how does it work, and is it the right choice for your job?

Let’s break the subject down in a straightforward, practical way with these volumetric concrete FAQs, so you can make a confident decision.

✅ Order volumetric concrete today
✅ Free, fast quote within 24 hours
✅ Call, message or complete our simple online form

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

What Is Volumetric Concrete?

Volumetric concrete, often called mix-on-site concrete, is exactly what it sounds like. Instead of arriving ready mixed, the concrete is produced on site using a specialised truck.

The truck carries the raw materials separately, cement, aggregates, sand and water, and mixes them on site as needed. That means the concrete you receive is fresh, made to your exact requirements, and ready for immediate use.

Volumetric concrete removes much of the guesswork and gives you far more control than traditional methods.

How Is Volumetric Concrete Different from Ready Mix?

One of the first volumetric concrete FAQs is about the key difference in where and when the concrete is mixed.

With ready mix, everything is batched at a plant and transported to the site in a specialist concrete truck with a rotating drum. Once the concrete is loaded, the clock starts ticking. Although Flowmix provides a solid 2-hour delivery window, on-site delays or other holdups could compromise the concrete pour. In addition, if you’ve ordered too much ready-mix concrete, you’re paying for concrete you can’t use.

Volumetric concrete flips these issues completely.

It’s mixed on site, which means you only get what you need when you need it. If the job changes, the mix can be adjusted on the spot. There’s no pressure to rush the pour, and no stress about getting your quantities spot on the first time. If there’s anything left over, that’s no problem. You only pay for what you use.

For many projects, especially where flexibility matters, that’s a big advantage.

How Does a Volumetric Concrete Truck Work?

One of the many volumetric concrete FAQs we’re asked is how a volumetric truck works. Essentially, it’s a mobile batching plant.

Each material is stored in its own compartment. When the pour begins, the experienced Flowmix operator sets the required mix, and the machine combines everything through an auger system (a mechanical device that mixes everything). The concrete is mixed continuously as it’s discharged, so you get a consistent, fresh supply throughout the pour.

If something changes on site, strength, slump, or volume, adjustments can be made instantly without stopping the job.

Need Expert Advice?

Speak to the team at Flowmix Tewkesbury, Gloucestershire or Aldridge, Walsall. We are happy to help with all your concrete requirements. Contact us by email or telephone.

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

What Are the Benefits of Volumetric Concrete?

One of the biggest advantages is that you only pay for the concrete you use. There’s no overordering just to be safe, and no leftover concrete to deal with at the end of the job.

Because it’s mixed on arrival, the concrete is as fresh as it can be. That improves workability, helps ensure a better finish, and gives you flexibility. If ground conditions vary or plans change slightly, the mix can be tweaked on site.

For larger or phased projects, you can even pour different mixes in a single visit, saving time and keeping things moving efficiently.

And importantly, there’s far less risk of delays causing problems. With ready mix, traffic or hold-ups can affect the load. With volumetric, the mixing starts when you’re ready.

What Projects Is Volumetric Concrete Best For?

On commercial sites, volumetric concrete is an ideal solution for phased builds, foundations, and jobs where requirements often change as work progresses. It’s an option for sites with restricted access or tight scheduling, where flexibility is key.

For domestic projects, it’s a great option for extensions, driveways, patios, and smaller pours. If you’re unsure about exact quantities, it removes that pressure completely.

At Flowmix, we also offer mini-mix deliveries for smaller loads or top-ups towards the end of a project, which can be far more cost-effective than ordering a full load.

Is Volumetric Concrete Right for Every Project?

Volumetric concrete isn’t always the best option, and it’s worth being honest about that.

It’s good when flexibility matters, if you don’t know exact quantities, if you expect changes on site, or if you want to avoid waste.

For very large pours where everything is tightly planned and consistent, ready mix is more suitable.

We hope that these volumetric concrete FAQs have been helpful. Contact us if you need help.

How Flowmix Can Help with Your Project

Flowmix has two plants, Gloucester and Walsall. We provide the following services (with time slots):

✅ Ready-mix concrete, mix on-site (volumetric concrete)
✅ Traditional and liquid screed.
✅ Concrete line pump Hire to reduce manual labour and associated costs, increase efficiency, reduce wastage and clean up.
✅ Interlocking concrete blocks for temporary or permanent barriers.
✅ Mini-Mix loads up to 4 cubic metres.

Flowmix holds the BSA-approved Ready Mix Concrete Kitemark KM683844, a certification that “confirms a product or service’s claim has been independently and repeatedly tested by experts” (source BSI).

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Flowmix Delivery Areas

Tewkesbury	Walsall Plant
Bourton-on-the-Water	Aldridge
Brockworth	Barton-Under-Needwood
Chalford	Birmingham
Cheltenham	Brownhills
Chipping Campden	Burntwood
Cirencester	Burton Upon Trent
Droitwich Spa	Cannock
Evesham	Coleshill
Gloucester	Dudley
Great Malvern	Great Haywood
Ledbury	Lichfield
Newent	Norton Canes
Northleach	Penkridge
Pershore	Rugeley
Ross-on-Wye	Stafford
Stow-on-the-Wold	Tamworth
Stroud	Walsall
Tewkesbury	West Bromwich
Worcester	Wolverhampton

If you’ve ever taken on a project at home or on site and realised you don’t need a full load of concrete, you’ll know how frustrating it can be. Too much and you’re wasting money. Too little and everything grinds to a halt.

That’s exactly where mini mix concrete Walsall comes in, and it’s why more homeowners, builders and developers are turning to smaller, more flexible deliveries from companies like Flowmix.

✅ Order mini mix concrete today
✅ Free, fast quote within 24 hours
✅ Call, message or complete our simple online form

Flowmix Walsall: Tel: 01922 741731

What Is Mini Mix Concrete?

If you order a standard delivery of ready-mix concrete and don’t use it all, you still pay for the entire load.

Put simply, mini mix concrete is exactly what it sounds like: smaller loads of ready-to-use concrete delivered straight to your site.

Flowmix mini mix trucks deliver up to 4 cubic metres, making it ideal for jobs that don’t justify a full-size truck but still need high-quality, professionally mixed concrete.

Ordering mini mix concrete Walsall is a step up from mixing it yourself, and a more efficient option for smaller pours.

7 Benefits of Mini Mix Concrete Walsall

If you’re planning a project and don’t need a full concrete load, what’s the solution? You either overpay, over-order, or end up with waste you didn’t need in the first place.

That’s exactly why more people are choosing a mini mix concrete Walsall supplier like Flowmix for smaller and medium-sized jobs.

Our mini mix trucks deliver up to 4 cubic metres, giving you the flexibility to get the amount of concrete you need without overcomplicating things.

Here’s why mini mix works so well.

#1: You Only Pay for What You Need

You pay only for the concrete you use, avoiding unnecessary expense.

With larger ready-mix concrete deliveries, there’s always the temptation to round up “just to be safe”. The problem is that extra concrete costs money and is often wasted.

Mini mix lets you order exactly the amount you need, keeping your budget under control.

#2: Perfect For Smaller Jobs and Top-Ups

Not all jobs require a large concrete pour. Mini mix suits driveways, patios, footings, shed bases, and garden work. It’s great for top-ups or small commercial jobs too.  Order just the right amount when you need it.

#3: Easier Access on Walsall Sites

Anyone who’s worked around Walsall and the surrounding area in the West Midlands knows access isn’t always straightforward.

It’s a busy region with narrow streets, tight driveways, and restricted sites; these are all common challenges for large concrete trucks.

Mini mix trucks are smaller and easier to manoeuvre, which means they can reach places larger vehicles simply can’t. That benefit alone can save a lot of hassle on the day.

Need Expert Advice?

Speak to the team at Flowmix Tewkesbury, Gloucestershire or Aldridge, Walsall. We are happy to help with all your concrete requirements. Contact us by email or telephone.

Flowmix Walsall: Tel: 01922 741731

#4: No On-Site Mixing Required

Mixing concrete yourself might seem like a way to save money, but it often costs you time, effort and consistency. Unless you’re a professional, getting the mix right for your project can be a challenge.

With mini mix, concrete arrives at your site ready for immediate use. No mixing or measuring; get consistent quality every time.

#5: Reduces Waste and Mess

Over-ordering means paying for costly, unusable leftover concrete. Mini mix eliminates waste and extra costs. It enables you to order only what you need to keep your site clean and efficient.

#6: Faster, More Efficient Workflow

Ready concrete in the right amount keeps your project moving smoothly. Efficient delivery helps jobs run on schedule from start to finish.

#7: Backed By Local Expertise with Flowmix

Partnering with a local supplier such as Flowmix means receiving support from a team familiar with the region, common site challenges, and local project requirements.

Flowmix has been supplying concrete since 2018, with experienced, knowledgeable drivers. We offer 2-hour delivery slots, fair prices, and up to 4 cubic metres per load.

Conclusion

As a mini mix concrete Walsall supplier, we know that not every project needs a full load of concrete. Overordering can create more problems than it solves.

With a mini mix concrete Walsall delivery, you get flexibility, efficiency and better control over your costs, all without sacrificing quality.

For smaller jobs or tricky access, mini mix is often the smart choice.

How Flowmix Can Help with Your Project

Flowmix has two plants, Gloucester and Walsall. We provide the following services (with time slots):

✅ Ready-mix concrete, mix on-site (volumetric concrete)
✅ Traditional and liquid screed.
✅ Concrete line pump Hire to reduce manual labour and associated costs, increase efficiency, reduce wastage and clean up.
✅ Interlocking concrete blocks for temporary or permanent barriers.
✅ Mini-Mix loads up to 4 cubic metres.

Flowmix holds the BSA-approved Ready Mix Concrete Kitemark KM683844, a certification that “confirms a product or service’s claim has been independently and repeatedly tested by experts” (source BSI).

Flowmix Walsall: Tel: 01922 741731

Flowmix Aldridge Delivery Areas

Aldridge

Barton-Under-Needwood

Birmingham

Brownhills

Burntwood

Burton Upon Trent

Cannock

Coleshill

Dudley

Great Haywood

Lichfield

Norton Canes

Penkridge

Rugeley

Stafford

Tamworth

Walsall

West Bromwich

Wolverhampton

We’re often asked what the best temperature for pouring concrete is. The UK weather can be unpredictable, even within a single day, so it’s essential to monitor for strong, lasting results.

Whether you’re building a driveway, patio, or structure, knowing the best temperature for pouring concrete will save you time, reduce costs, and prevent issues like cracking or improper curing.

✅ Order ready-mix or volumetric concrete today
✅ Free, fast quote within 24 hours
✅ Call, message or complete our simple online form

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Why Does Temperature Matter When Pouring Concrete?

Concrete strength forms through a chemical reaction called hydration (when you mix water with cement), and temperature plays a vital role; certain weather conditions can skew that reaction.

• Cold weather: Slows curing, increasing the risk of frost damage and cracks. Concrete poured in low temperatures may never achieve full strength, so long-term durability gets compromised.
• Hot weather: Accelerates water loss, causing the mix to set too quickly. That can result in shrinkage, surface cracks, and reduced strength.

By monitoring temperature, you ensure the concrete cures properly and remains durable for years.

The Ideal Temperature Range for Pouring Concrete

From our experience, we’ve found the best temperature for pouring concrete is between 10°C and 25°C.

• Below 5°C: Concrete cures very slowly, and frost can damage it before it sets.
• Above 30°C: Rapid evaporation makes concrete hard to manage and may weaken the result.

In the UK, plan pours in spring, summer, or autumn, and always check forecasts for sudden overnight temperature changes.

Need Expert Advice?

Speak to the team at Flowmix Tewkesbury, Gloucestershire or Aldridge, Walsall. We are happy to help with all your concrete requirements. Contact us by email or telephone.

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 74173

Tips for Pouring Concrete in Non-Ideal Temperatures

Of course, we know that perfect weather isn’t always possible. Use the following tactics to manage your concrete pour if you’re facing less than ideal weather:

• Cold-weather solutions: Add heated water to the mix (not boiling), cover freshly poured concrete with insulated blankets or tarpaulins, and consider accelerators to speed curing.
• Hot-weather solutions: Pour during cooler hours, such as early morning or late evening. Shade the site and mist the surface with water to prevent premature drying.

Thoughtful planning and preparation greatly impact your concrete’s final quality, even in tough conditions.

Conclusion

The best temperature for pouring concrete isn’t a general guideline. It’s an essential factor in ensuring a strong, long-lasting finish for your project.

The experienced Flowmix team can provide guidance on the best temperature for pouring concrete for your specific project and ensure timely delivery, helping you achieve professional results without the stress.

Don’t leave the success of your concrete project to chance. Contact Flowmix today for tailored advice and expert support. Our knowledgeable team is ready to help you plan every detail and ensure your pour achieves the best possible results.

How Flowmix Can Help with Your Project

Flowmix has two plants, Gloucester and Walsall. We provide the following services (with time slots):

✅ Ready-mix concrete, mix on-site (volumetric concrete)
✅ Traditional and liquid screed.
✅ Concrete line pump Hire to reduce manual labour and associated costs, increase efficiency, reduce wastage and clean up.
✅ Interlocking concrete blocks for temporary or permanent barriers.
✅ Mini-Mix loads up to 4 cubic metres.

Flowmix holds the BSA-approved Ready Mix Concrete Kitemark KM683844, a certification that “confirms a product or service’s claim has been independently and repeatedly tested by experts” (source BSI).

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Flowmix Delivery Areas

Tewkesbury Plant	Walsall Plant
Bourton-on-the-Water	Aldridge
Brockworth	Barton-Under-Needwood
Chalford	Birmingham
Cheltenham	Brownhills
Chipping Campden	Burntwood
Cirencester	Burton Upon Trent
Droitwich Spa	Cannock
Evesham	Coleshill
Gloucester	Dudley
Great Malvern	Great Haywood
Ledbury	Lichfield
Newent	Norton Canes
Northleach	Penkridge
Pershore	Rugeley
Ross-on-Wye	Stafford
Stow-on-the-Wold	Tamworth
Stroud	Walsall
Tewkesbury	West Bromwich
Worcester	Wolverhampton

Concrete cracking is avoidable, but spotting cracks after pouring concrete is always disappointing.

It doesn’t matter whether it’s a driveway, a slab, or part of a larger build; concrete cracking always raises the same question… is this normal, or is something wrong?

Concrete cracks are common. Many are harmless but can sometimes signal costly issues. The key is identifying the cause.

✅ Order ready-mix or volumetric concrete today
✅ Free, fast quote within 24 hours
✅ Call, message or complete our simple online form

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Why Does Concrete Crack?

Concrete is strong, but it’s not flexible, and that’s the root of the problem.

As concrete dries, it shrinks. Restricted or uneven movement causes cracks, sometimes just at the surface, other times deeper.

Most cracks are harmless, but there are a few warning signs to watch for:

• Uneven or sunken areas
• Water seeping through
• Cracks that continue to expand
• Cracks wider than a few millimetres

If you notice any of these issues, it’s worth getting it checked properly.

The Most Common Causes of Concrete Cracking

#1: Shrinkage During Drying

Evaporation causes shrinkage. If concrete dries too quickly, especially in hot or windy conditions, the surface can crack.

This type of concrete cracking is usually hairline and cosmetic, but it can still be frustrating to see.

#2: Poor Ground Preparation

Without a compacted base, the ground can shift, leaving concrete unsupported and cracking under pressure.

This type of concrete cracking is more serious and often results in uneven surfaces.

#3: Too Much Water in the Mix

It might seem like adding more water makes concrete easier to work with, but it weakens the result. A wetter mix increases shrinkage and makes concrete cracking far more likely once it sets. Doing a slump test can help determine concrete workability.

#4: Temperature Changes

Weather conditions affect curing. Heat expands the concrete, while cold contracts it, creating stress and potential cracks.

Cracking is especially common on outdoor slabs exposed to the elements year-round.

#5: Heavy Loads and Stress

Too much weight or early use can cause deeper, structural cracks. Let concrete harden for weeks before heavy use.

#6: Poor Curing

Curing controls moisture, allowing concrete to gain strength. In hot weather, spray water. In cold, protect from elements.

If concrete curing is rushed or ignored, early concrete cracking becomes much more likely.

Need Expert Advice?

Speak to the team at Flowmix Tewkesbury, Gloucestershire or Aldridge, Walsall. We are happy to help with all your concrete requirements. Contact us by email or telephone.

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Not All Cracks Are the Same

One of the biggest misconceptions is that all cracks mean failure. They don’t.

• Hairline cracks are usually cosmetic.
• Shrinkage cracks are common and expected.
• Settlement cracks may indicate movement underneath.
• Structural cracks are wider and deeper and require attention.

The difference comes down to size, depth, and whether the crack is getting worse.

How To Prevent Concrete Cracking

The good news is that most concrete cracking can be avoided with the right approach.

#1: Start With Solid Groundwork

A well-prepared, compacted sub-base gives the concrete the support it needs. Skipping this step is where many problems begin.

#2: Use The Right Mix

Getting the mix right matters more than people think. Too much water, or the wrong type of concrete for the job, will almost always lead to issues later.

If you’re unsure of the right mix, the experienced Flowmix team are happy to advise.

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

#3: Plan Control Joints

Concrete will crack at some point. Control joints provide a planned place for it, keeping cracks neat and preventing random splitting.

#4: Don’t Rush the Curing Process

Keep the surface moist, protect it from direct sun, and give it time. Proper curing massively reduces the risk of concrete cracking.

How To Stop Concrete from Cracking

Once cracks appear, what you do next depends on how serious they are.

• Small cracks can usually be filled or sealed to prevent water from entering.
• Moderate cracks may need to be routed out and repaired with specialist materials.
• Structural cracks often require professional repair, such as resin injection or stabilisation.

In some cases, where the damage is widespread, replacing the concrete is the better long-term option.

Conclusion

Concrete cracking is part of working with concrete. You’ll rarely find a slab that stays completely perfect over time.

What matters is understanding the difference between normal and problematic cracks and taking the right steps to help prevent them from occurring in the first place.

By following these steps, you’ll set your concrete projects up for long-term durability and minimise the risk of future problems.

How Flowmix Can Help with Your Project

Flowmix has two plants, Gloucester and Walsall. We provide the following services (with time slots):

✅ Ready-mix concrete, mix on-site (volumetric concrete)
✅ Traditional and liquid screed.
✅ Concrete line pump Hire to reduce manual labour and associated costs, increase efficiency, reduce wastage and clean up.
✅ Interlocking concrete blocks for temporary or permanent barriers.
✅ Mini-Mix loads up to 4 cubic metres.

Flowmix holds the BSA-approved Ready Mix Concrete Kitemark KM683844, a certification that “confirms a product or service’s claim has been independently and repeatedly tested by experts” (source BSI).

Flowmix Tewkesbury: Tel: 01684 217888 Flowmix Walsall: Tel: 01922 741731

Flowmix Delivery Areas

Tewkesbury	Walsall Plant
Bourton-on-the-Water	Aldridge
Brockworth	Barton-Under-Needwood
Chalford	Birmingham
Cheltenham	Brownhills
Chipping Campden	Burntwood
Cirencester	Burton Upon Trent
Droitwich Spa	Cannock
Evesham	Coleshill
Gloucester	Dudley
Great Malvern	Great Haywood
Ledbury	Lichfield
Newent	Norton Canes
Northleach	Penkridge
Pershore	Rugeley
Ross-on-Wye	Stafford
Stow-on-the-Wold	Tamworth
Stroud	Walsall
Tewkesbury	West Bromwich
Worcester	Wolverhampton