When the weather improves, there’s nothing better than relaxing outdoors with friends or family. A well-built patio can completely transform your garden, providing a durable and comfortable space for outdoor furniture, barbecues, and entertaining guests.
Concrete is one of the most reliable materials for building a patio. It’s strong, affordable, and long-lasting, making it a popular choice for homeowners throughout the UK.
In this guide, the team at Q Mix Concrete explains exactly how to lay a concrete patio, including preparation, base construction, and pouring techniques to achieve a professional finish.
How to Lay a Concrete Patio (Step-by-Step UK Guide)
1. Plan the Size and Location
Before beginning any work, decide where your patio will be located and determine its exact dimensions.
Accurate measurements are important because they help calculate how much concrete you will need for the project. Make sure to also check for underground utilities such as drainage pipes or septic systems before selecting the final location.
Whenever possible, choose a naturally level area to minimise the amount of ground preparation required.
2. Mark the Patio Area
Use wooden stakes to mark the corners of your planned patio.
Run string between each stake to clearly outline the area. This step allows you to visualise the finished space and check that the layout is square and even.
If the ground slopes, you may need to:
- Build up the lower side
- Dig out the higher ground
This ensures your patio will be level and stable once finished.
3. Clear the Area
Remove everything within the marked patio area, including:
- Grass
- Weeds
- Roots
- Topsoil
- Loose stones
Clearing the site properly helps prevent movement beneath the patio and improves the long-term durability of the concrete surface.
4. Prepare the Base
Next, dig down to prepare the foundation.
The depth will depend on whether you want the patio raised or level with the surrounding ground.
Typical depths include:
- 10 cm (4 inches) for raised patios
- 20 cm (8 inches) for patios level with the ground
After digging, compact the soil thoroughly using a tamper or plate compactor. A solid base helps prevent cracking or shifting later on.
For heavy features such as outdoor kitchens or large furniture sets, it is recommended to install a concrete foundation for extra strength.
5. Add an Aggregate Layer
Once the ground is compacted, add a layer of crushed rock or gravel.
A typical aggregate layer should be around 10 cm thick.
This layer improves drainage and helps distribute weight evenly across the patio surface. Spread the gravel evenly and compact it again to ensure stability.
6. Install Additional Stakes
Drive additional wooden stakes around the outer edge of the patio area.
These stakes should be spaced approximately 60 cm apart and placed slightly outside the original layout line.
Their purpose is to support the wooden frames that will hold the concrete in place during pouring.
7. Install the Formwork (Frames)
Formwork, also known as forms, acts as a temporary barrier that keeps wet concrete contained while it sets.
To create the frame:
- Use timber boards such as 2×4 planks
- Cut them to match the patio dimensions
- Nail the boards together securely
Make sure the inside measurement of the frame matches the patio dimensions exactly.
Before pouring concrete, coat the boards with release agent or vegetable oil. This prevents the concrete from sticking and makes removing the forms easier later.
8. Arrange the Concrete Supply
At this stage, the patio base is ready for pouring.
Using ready mix concrete is the most efficient option for achieving a consistent mix and professional finish.
The team at Q Mix Concrete can supply the exact amount of concrete required for your project, ensuring minimal waste and accurate delivery directly to your site.
9. Pour and Level the Concrete
Pour the concrete evenly into the prepared patio area.
Start pouring from one corner and work gradually across the space.
Use tools such as:
- A shovel
- A rake
to push the concrete into the corners and ensure complete coverage.
Once the area is filled, use a straight 2×4 board to level the surface, dragging it across the top of the formwork.
This process removes excess concrete and creates a smooth finish.
10. Add Finishing Details
After the surface is level, use an edging tool along the inside of the formwork to create rounded edges.
Once the concrete begins to firm up and can support your weight, cut control joints every 8 feet. These joints help prevent cracking by allowing the concrete to expand and contract naturally.
11. Allow the Concrete to Cure
Curing is one of the most important stages of the process.
Cover the patio with a plastic sheet or curing compound to protect it from drying too quickly.
Allow the concrete to cure for at least 48 hours before light use. However, full curing usually takes around 28 days to reach maximum strength.
What Concrete Is Best for a Patio?
A standard domestic ready mix concrete is usually suitable for patios.
Common mixes include:
- C20 / GEN3 – suitable for garden patios and paths
- C25 / ST2 – stronger mix for heavier loads
Choosing the correct concrete grade ensures your patio will remain durable and resistant to weather conditions for many years.
Need Concrete for Your Patio Project?
If you’re planning to build a patio, having the right concrete delivered at the right time can make the entire project easier.
Q Mix Concrete supplies high-quality ready mix concrete for domestic and commercial projects across Kent and surrounding areas. Our experienced team can help you choose the correct mix and ensure accurate delivery directly to your site.
📞 Call our team today: +44 800 077 33