What is the difference between an indoor and outdoor padel court in terms of construction?

The difference between an indoor and an outdoor padel court comes down to three things: the weight of the steel structure, the type of foundation and the extra protection against the weather. An indoor court stands in a sheltered environment and therefore places fewer demands on the structure. An outdoor court has to deal with wind, rain and temperature fluctuations and must be structurally calculated for them. That has a direct effect on construction, cost and the choices you make.

Whether you want to set up a commercial sports venue, modernise a tennis club or are thinking about an outdoor padel complex: the choice between an indoor and an outdoor court is one of the first and most important decisions in the project. In this article we explain the difference one aspect at a time, so you can go into it well informed.

What is the difference between an indoor and an outdoor padel court?

The biggest difference between an indoor and an outdoor padel court is the structural weight and the foundation build-up. An indoor court stands in a hall, is protected from wind and rain and can be built with a lighter steel structure on a simpler foundation. An outdoor court must withstand wind load, frost, heat and precipitation. That calls for a heavier structure and a water-permeable foundation.

The permit process also plays a role. An indoor padel court in an existing hall does not always require a separate building permit, depending on the situation. An outdoor padel court requires an environmental permit in almost all cases, including structural calculations, an acoustic study and a lighting study. That makes the process longer and more complex for an outdoor court.

The playing area itself has identical dimensions: 20 by 10 metres, with the same net heights and line markings. The difference therefore lies entirely in the construction, the structure and the environmental requirements, not in the game itself.

Which foundation types are used for an outdoor padel court?

Three foundation types are used for an outdoor padel court: drainage concrete, Supersub and ZOAB asphalt (open-graded asphalt concrete). All three are water-permeable, so rainwater drains away quickly and the court stays quickly playable even after heavy rainfall. Which type is most suitable depends on the soil conditions, the budget and the specific location.

Drainage concrete

Drainage concrete is a water-permeable type of concrete with an open structure, so that rainwater drains straight through the foundation into the subsoil. It is a proven solution with an average lifespan of 25 to 40 years. Drainage concrete has a high bearing capacity, is resistant to frost and intensive use and requires relatively little maintenance. For padel courts it is almost always combined with a ring foundation with steel reinforcement, to absorb the forces of the steel structure and wind load properly.

Supersub

Supersub is an innovative foundation solution based on foam concrete. The material is lightweight, self-levelling and shock-absorbing, which contributes to a comfortable playing experience. The water-permeable outdoor version can handle up to 500 mm of rainfall per hour. Another advantage: in many cases Supersub can be laid within one day. For new construction the thickness is usually around 15 cm. For renovation or conversion of an existing tennis court it is around 10 cm.

ZOAB asphalt

ZOAB asphalt, also known as open-graded asphalt concrete, is a porous type of asphalt that lets water through. It is less common for padel courts than drainage concrete or Supersub, but can be a good option in certain situations, for example at locations where asphalt is already present or where the soil conditions call for it.

All foundation components must be approved in the Netherlands by Kiwa ISA Sport. This is something that inexperienced buyers sometimes run into: materials that are not certified do not meet Dutch standards and can cause problems at completion or during an official inspection.

How heavy does the steel structure of an outdoor court need to be?

The steel structure of an outdoor padel court must be heavier than that of an indoor court, because the structure has to withstand wind load, rain and temperature fluctuations. The tubular profiles are thicker, the base plates larger and the connections stronger. In addition, hot-dip galvanised steel is used as standard protection against corrosion and weather.

In concrete terms: an outdoor Panorama structure uses tubular profiles of 150×150, 120×120 and 100×100 mm, made of hot-dip galvanised steel. The columns are fixed to base plates with chemical anchors and the structure is calculated for a maximum wind speed of 258 km/h. These are structural requirements that simply do not apply to an indoor court, because the hall itself already offers protection.

Every location also requires its own calculation. A court on open terrain or in a coastal area faces a different wind load than a court in a sheltered urban environment. Importing a standard structure and putting it up is therefore not a responsible approach for outdoor courts. The steel structure has to be calculated per location and matched to the specific conditions.

What does an indoor padel court cost compared with an outdoor padel court?

An indoor padel court is cheaper than an outdoor padel court. As an indication, a standard indoor court turnkey is possible from around €23,000, including steel structure, glass, artificial turf, LED lighting and installation. An outdoor padel court costs from around €30,000 excluding foundation and from around €50,000 on average including foundation. The price difference is mainly explained by the heavier structure and the more complex foundation of outdoor courts.

The foundation is the biggest cost factor for an outdoor padel court. Depending on soil conditions, accessibility and the civil works required, foundation costs average between €20,000 and €40,000. At locations where an existing tennis court is converted, part of the substructure can sometimes be reused, which saves costs.

When comparing quotations, always make clear what is and is not included. A low price for the superstructure can be misleading if the foundation, the artificial turf or the lighting are charged separately. The exact price always depends on the specific location, the number of courts, the soil conditions and the desired specification.

Which artificial turf and glass are used for an outdoor court?

An outdoor padel court uses padel-specific artificial turf that is designed for intensive outdoor use and is resistant to UV radiation, temperature fluctuations and precipitation. The artificial turf usually has a pile height of 13 mm and is filled with quartz sand for the right ball bounce and grip. The glass placed around the court is toughened safety glass that meets the structural and safety standards for outdoor use.

As for the artificial turf, the material must meet the NOC*NSF standards and be approved by Kiwa ISA Sport before it can be placed on the sports products list. This includes requirements regarding the number of stitches per m², fibre density, the UV warranty and the adhesion of the material. For an outdoor court UV resistance is especially relevant, because the artificial turf is exposed to sunlight all year round.

The glass of an outdoor court must also withstand wind load and temperature differences. The glass fixing is included in the structural calculation of the court, so that the whole functions as one stable system. Cheap glass that is not matched to the structure can cause problems in the long run, both in terms of safety and playing quality.

Can sound-absorbing panels be installed on an outdoor court?

Yes, sound-absorbing panels can be installed on an outdoor padel court, both on new courts and retrofitted to existing structures. The panels are fixed to the outside of the mesh of the cage structure and absorb the sound of balls and rackets instead of reflecting it back. In practice this delivers a clearly audible noise reduction at distances of around 40 to 100 metres.

Important to know: when you place panels on the outside of the cage structure, the wind permeability of the structure decreases. That means more wind pressure acts on the court. The steel structure therefore has to be structurally reinforced, in line with the wind zone of the location. This is not something you want to overlook, because it directly affects the safety and lifespan of the court.

Whether sound-absorbing panels are enough to meet municipal noise standards always depends on the location and the results of an acoustic report. In some cases a combination with a noise barrier is needed, or additional measures are taken, such as adjusted playing times. A noise barrier is a free-standing structure placed next to or around the court that blocks sound towards homes. Placing a noise barrier almost always requires an environmental permit.

When do you choose an indoor court and when an outdoor padel court?

You choose an indoor padel court when you want to play all year round without depending on the weather, when you have an existing hall available, or when you want to keep the total project cost as low as possible. You choose an outdoor padel court when no covered space is available, when the location offers enough space and the budget allows for the higher construction costs.

For commercial operators the choice is often also a matter of return. An indoor court can be played on all year round, regardless of the weather, and needs less maintenance on the structure. That makes the occupancy rate more predictable. An outdoor court has lower start-up costs in terms of housing, but higher construction costs because of the foundation and the heavier structure.

For tennis clubs that want to convert existing courts, the choice is often determined by the available space and the budget. Outdoor courts fit well with the existing infrastructure of a tennis park. Indoor locations require a hall, but offer more playing certainty and less noise nuisance for local residents, which can simplify the permit process.

In the end there is no universally right answer. The best choice depends on your location, target group, budget and long-term vision. At I-Padel we are happy to help you build a padel court that suits your situation, from the first advisory meeting to completion. Get in touch for an initial exploration and we will look together at what best fits your plans.

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