Porous Concrete for Padel Courts: Why It Matters for Drainage and Play

An outdoor padel court is only as good as the layer beneath the turf. Porous concrete lets rainwater drain straight through the playing surface, so courts dry quickly and stay playable shortly after a shower. Here is what it is, how it is mixed and laid, and why grain size decides how evenly the ball bounces.

What is porous concrete?

Porous concrete – also called pervious or permeable concrete – is a concrete made with little or no fine aggregate. Without sand to fill the gaps, open voids remain between the stones. Water passes through these voids instead of running across the surface.

It is widely used for car parks, footpaths and driveways where water management matters. On a padel court, it forms the rigid, free-draining base on which the artificial turf is installed.

Why outdoor padel courts need a porous base

In wet climates such as the UK, Ireland and much of the DACH region, drainage is the key design decision for an outdoor court. UK guidance from the LTA notes that a non-porous concrete slab is generally considered unsuitable for the UK climate.

A porous base brings clear benefits:

• No standing water. Rain drains vertically, so puddles do not form on the turf.
• Faster return to play. Players can resume shortly after the rain stops – fewer cancelled bookings.
• Flat surface, no falls. A sealed slab needs a gradient (typically up to 1:100) to shed water. A porous base can be built flat, which is better for play.
• Longer turf life. The turf does not sit in water, which reduces wear, moss and algae.
• Less frost damage. Water does not collect under or on the surface, so freeze-thaw stress is lower.

How to make porous concrete for a padel court

Porous concrete for sports surfaces is a carefully controlled mix. It typically combines:

• Single-size, washed aggregate – no sand or fines, so the voids stay open
• Cement – enough to coat and bind each stone, not to fill the gaps
• Water – a low water content, so the cement paste does not drain down and block the base of the layer
• Admixtures (optional) – to improve workability or strength

The mix should come from a concrete plant with consistent quality control. Site-mixed batches vary too much for a sports surface.

Grain size: why 3-5 mm is ideal

For padel, the aggregate should be finely porous, ideally 3-5 mm. Larger stones drain well, but they make it very hard to achieve the surface evenness a sports court needs.

Evenness matters because the ball bounces directly off the turf on top. Even small dips change the bounce. German technical guidelines for padel courts, for example, allow a maximum deviation of 3 mm under a 3 m straight edge and 10 mm over the 20 m length (DuelPadel / Padel Rheinland-Pfalz).

How porous concrete is laid (step by step)

1. Prepare the ground. Excavate, compact and install a free-draining, frost-resistant aggregate sub-base.
2. Build the perimeter ring beam. A reinforced concrete beam carries the court structure (posts, glass and mesh). See our guide to the padel court foundation.
3. Place the porous concrete. Deliver the mix and spread it over the sub-base.
4. Level and compact. Screed the surface to level and compact it lightly, without closing the pores.
5. Cure. Cover the surface and keep it moist so the cement can harden properly.
6. Check evenness. Measure with a straight edge before the turf goes down.
7. Install the turf. Lay and sand-fill the artificial grass.

For the full earthworks sequence, see groundworks for padel courts.

Porous concrete vs porous asphalt vs standard concrete

Maintenance and lifespan

Porous concrete works only while its voids stay open. Keep the court clean of leaves, dirt and organic material, and follow the turf supplier’s brushing and sand top-up schedule. Regular care keeps drainage and turf performance consistent for years.