What are the foundation requirements for an indoor padel court on a concrete floor?

In most cases, an indoor padel court on an existing concrete floor does not need an extra foundation, but the floor does have to meet a number of concrete technical requirements. Think of sufficient load-bearing capacity, a flat surface and the correct anchoring of the steel structure. Below we answer the most frequently asked questions about foundation requirements for an indoor padel court on concrete.

What loads does a concrete floor need to withstand for a padel court?

A concrete floor for an indoor padel court must be able to absorb the static and dynamic loads of the steel structure, the glass, the players and the ball. The steel structure and glass walls of a padel court together easily weigh several tonnes. On top of that come the point loads on the anchor points of the structure, which can temporarily rise considerably under wind load or impacts.

In practice, there are two types of load that the floor must be able to carry:

• Static load: the permanent weight of the cage structure, the glass and the artificial turf including the sand bed.
• Dynamic load: the forces that arise during play, such as players running into the wall or the ball hitting the glass hard.

A standard industrial concrete floor of sufficient thickness and strength is suitable in most cases. Not sure whether your floor is strong enough? A structural calculation per location provides certainty. Every situation is different, and a floor that is perfectly suitable for storage does not automatically meet the requirements for a permanent sports structure.

How is a padel court anchored to an existing concrete floor?

The steel structure of a padel court is fixed to the concrete floor using anchor bolts or chemical anchors. The posts of the cage structure are anchored at fixed points in the concrete, so that the structure stands stably and horizontal forces are transferred properly. The exact method depends on the thickness and quality of the existing floor.

With chemical anchors, a special injection mortar is used that bonds the bolt firmly into the concrete. This is a reliable method for existing floors where drilling and new pours are undesirable. With newly built floors, anchor bolts can also be cast in directly, which produces an even stronger connection.

It is important that the anchor points are calculated precisely based on the wind load and the structural requirements of the specific court. A padel court with sound-absorbing panels on the outside, for example, calls for a reinforced structure, because the panels reduce wind permeability and thereby increase the wind load on the cage structure. This has direct consequences for the anchoring requirements.

Is an extra foundation needed if the concrete floor is already there?

In most cases an extra foundation is not needed if the existing concrete floor is sufficiently thick, flat and load-bearing. The concrete floor then serves as the subfloor on which the cage structure is anchored. An additional foundation layer is only needed if the floor is damaged, too thin or shows local settlement.

Sometimes a levelling layer is applied to correct small differences in height in the floor. This is not a full foundation, but a thin finishing layer that ensures the artificial turf lies flat and the structure is level. For larger irregularities, or a floor that does not meet the minimum requirements, an additional concrete layer or a solution such as Supersub can be used. Supersub is a foundation solution based on foam concrete that is self-levelling and creates a flat, stable subfloor, including in indoor spaces.

Whether an extra layer is needed is always determined on the basis of a site check and any soil probing. Do not rely on a general rule of thumb here, because the situation differs from hall to hall and from floor to floor.

What are the requirements for the flatness and drainage of the floor?

The floor must be flat enough for a consistent ball bounce and a safe playing surface. For padel, the subfloor must not have differences in height that make the ball bounce irregular or pose a fall risk for players. A maximum tolerance of a few millimetres per metre is customary in professional installations.

For an indoor padel court, drainage through the floor itself is less critical than for outdoor courts, because no rain falls on the court. Even so, a slight slope or a floor without water accumulation is desirable, so that cleaning water drains away quickly after cleaning. In halls with a flat floor and no slope, this is sometimes solved with a drain along the edge of the court.

The artificial turf laid on the floor also affects playing characteristics. An uneven subfloor is not corrected by the artificial turf, but rather carried through. A flat floor is therefore a basic requirement, not an option.

Which certifications apply to foundation materials for a padel court?

All foundation materials used for padel courts in the Netherlands must be approved by Kiwa ISA Sport. This is the recognised certification mark for sports floors and foundation solutions on the Dutch market. Materials without this approval do not meet the Dutch standards for professional use and can cause problems with permit applications or official tournaments.

Kiwa ISA Sport tests, among other things, the load-bearing capacity, flatness, shock absorption and water permeability of foundation solutions. For indoor padel courts, the requirements for flatness and shock absorption are particularly relevant. Materials such as Supersub and drainage concrete are available in certified versions that meet these requirements.

When choosing a contractor or supplier, it is wise to always ask about the Kiwa ISA Sport certification of the materials used. Inexperienced parties sometimes work with non-certified products, which can lead to problems later at inspection or in official competitions.

What does the foundation of an indoor padel court on a concrete floor cost?

If the existing concrete floor is in good condition and meets the technical requirements, the foundation costs for an indoor padel court are relatively limited. The main cost item is then the anchoring of the steel structure, possibly combined with a levelling layer. This is considerably cheaper than building a complete foundation for an outdoor court.

If an additional layer is needed, for example Supersub of around 10 to 15 centimetres thick, material and labour costs are added. The exact costs always depend on the surface area, the condition of the existing floor and the chosen solution. A fixed price therefore cannot be given without a site check.

For comparison: for a complete outdoor padel court, foundation costs average between €20,000 and €40,000, depending on ground conditions and accessibility. For an indoor court on an existing concrete floor, these costs are generally much lower. Read more about the total cost of an indoor padel court in our cost overview.

How I-Padel helps with the foundation of your indoor padel court

At I-Padel we assess every location on its own merits. We carry out a site check, assess the condition of the existing floor and draw up a structural calculation tailored to your specific situation. That way you know exactly what is needed and what it costs, with no surprises afterwards.

What we arrange for you:

• Assessment of the existing concrete floor for load-bearing capacity and flatness.
• Structural calculation of the anchor points per location.
• Advice on the right foundation solution, including certified materials with Kiwa ISA Sport approval.
• Full execution of the foundation as part of the complete package, from anchoring to artificial turf and LED lighting.
• One point of contact for the entire process, from advice to handover.

Want to know whether your concrete floor is suitable for an indoor padel court and what the options are? Take a look at our padel court foundations page and find out what is possible for your situation.

Frequently asked questions