Best artificial turf base: types, advantages and how to choose the right one for your project
Choosing the best artificial turf base is as important as choosing the model itself.
The base determines the stability, drainage and final appearance of the grass over time. If it is well prepared, it will prevent puddles, subsidence and premature wear, ensuring a durable and flawless installation.
In this guide we explain what base to put under artificial grass, the most recommended types and how to choose the right one depending on the type of surface: garden, terrace, balcony or pool area.
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Why is it important to choose the right artificial turf base?
The base acts as a support structure.
Its function is to achieve a stable, level and very draining surface, preventing water from accumulating or the ground from deforming with use.
When properly executed, the installation is comfortable to walk on, aesthetically uniform and durable for years to come.
These are the most common surfaces on which artificial turf is installed:
On land or gravel
The most common option in landscaped areas.
It is recommended to use:
- Class II crushed gravel (granite or limestone)
- Or gravel + sand mixture
Characteristics:
- It should be applied in a thickness of 5 to 10 cm, compacted and levelled.
- It offers a perfect balance between stability, drainage and durability.
- If pets are present, it is best to use an aggregate without fines, which minimises odours and promotes cleaner drainage.
- Weed control netting is essential in natural areas to prevent unwanted vegetation growth.
On hard surfaces (concrete, tile or terrazzo)
Ideal for terraces, patios and balconies.
Advised:
- Drainage sheet or perforated geotextile for water evacuation
- Optionally, a foam base for added cushioning and sound insulation.
Advantages:
- Quick, clean and perfect installation to make the most of the existing surface without building work.
Additional considerations
- For domestic gardens, the recommended thickness of the set is 35-60 mm.
- Before installation, the ground should be checked to ensure that it is level, clean and free of debris that could mark the turf.
In a nutshell:
- Compacted gravel is the most complete base for gardens.
- On terraces, hard surfaces with drainage systems are the best option.
- The foam provides comfort in projects where the footprint is a priority.
Types of artificial turf underlays and their advantages
Each base has a different behaviour. To get it right, you first need to know how each of the different surfaces work when laying artificial turf:
Soap or compacted gravel
The best base for gardens. It is stable, permeable, resistant and easily compacted.
It allows optimal drainage and keeps the soil firm for years.
Sand and cement (zandcement or stabilised)
Creates an extremely firm and even surface.
Holds the level very well and drains well, but requires experienced installers.
Concrete or tiles
Solid, stable surface, perfect for terraces and patios.
It only requires checking and ensuring that the water drainage is correct.
Foam or rubber bases
Widely used in children's areas, sports areas or terraces where additional cushioning is required.
They offer a comfortable fit and reduce impact in the event of a fall.
Bonus track: Silica sand
It is not a main base, but a complement.
Adds weight, stability and better fibre recovery. Highly recommended as a final settling coat.
Which base to choose depending on the type of surface?
Each space needs a different approach to ensure the result.
Let's take a look at some examples of what our synthetic turf installers have done in practice.
In gardens
The best artificial turf base in this case is compacted soap.
If you are looking for maximum firmness, opt for the jabre, ideal for areas with heavy furniture or a lot of traffic.
The best models of artificial turf for gardens
On terraces or balconies
Installation should be on a solid surface such as concrete, tile or decking.
Similarly, and depending on the perimeter of the surface, we recommend adding a drainage sheet to prevent dampness.
The best models of artificial turf for terraces and balconies
Around swimming pools
A stable and very draining base is needed.
Compacted gravel or hard surface drainage systems are the best option to avoid moisture accumulation.
The best models of artificial turf for swimming pools
Children’s or sports areas
Cushioning foams or safety rubbers are essential to protect against falls and provide comfort.
The best models of artificial turf for playgrounds
Common mistakes when choosing a foundation (and how to avoid them)
- Install on unlevel ground: check the ground with a ruler or laser level.
- Ignore the need for drainage: make sure the surface has a slight slope (1-2%).
- Not compacting enough: use a vibrating plate or hand compactor in thin, even layers to ensure stability.
- Choosing a base that is too soft in areas with traffic: in areas with furniture, frequent foot traffic or children, opt for compacted gravel or sand+cement instead of soft bases.
Frequently asked questions about the artificial turf base
Is it necessary to put a weed barrier under the artificial turf?
Yes, it prevents the growth of weeds and prolongs the durability of the assembly.
How thick does the base need to be to prevent the turf from sinking?
5 to 10 cm of compacted gravel is sufficient in most gardens.
Which base is best if I am going to put heavy furniture on top of the lawn?
Sand + cement or highly compacted gravel to avoid subsidence.
Does the base affect the feel or comfort of the turf?
Yes, soft underlays such as foam significantly improve the feel of the foot.
What happens if I lay the artificial turf directly on the ground without preparing the base?
Dips, puddles and premature wear will appear.
Are there bases more suitable for pets or small children?
Yes, unfined aggregates and safety foams are the best options.
Can I reuse the base if I change the artificial turf in the future?
Yes, as long as the base is in good condition and recompacted if necessary.
The opinion of Turfexpert
- The base is key: it determines the stability, drainage and long-term durability of the artificial turf.
- In gardens, the most complete and reliable option is compacted gravel (jabre), due to its firmness and drainage capacity.
- On terraces and balconies, the ideal is to install on hard surfaces (concrete, tile or terrazzo) with a drainage sheet to prevent dampness.
- In children's or sports areas, shock-absorbing foams add safety and a more comfortable ride.
- Whatever the surface, the base must be level, clean, compacted and sufficiently sloped to allow water to drain away easily.
The right choice starts with a good foundation
Now you know that for artificial turf to really work, the base is not a minor detail, but the starting point.
Whether you want to assess which base best suits your project or need to review options before installing your artificial grass, we can help you make the right decision.
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