The normal base for indoor games is concrete floors. At least 100mm of concrete is recommended (with safety margins you can increase this). According to Swedish building standards, the deviation must be a maximum of 5mm by 5m, which means a very even surface.

 If you cast a new concrete sole, it is easy to cast in cable tubes, which go up where the lighting poles are.

For new concrete soles, we recommend that you keep track of the moisture of the concrete (and of course make sure to insulate with Styrofoam, drain properly, to prevent moist concrete soles, caused by the capillary forces).

If you choose to install underfloor heating / loops, you should pay attention that the loops end up at least 120mm below where the construction is. We have made installations where the floor heating is 100mm and we have used 90mm anchor bolts.

Note that the concrete must NOT be polished AND / OR treated (dust binding, for example) but must be a sluggish asphalt. If the concrete is apparently slippery, treatment (a primer that JuBo recommends that is carried out in a special way) is required so that the carpet does not slip and cause unwelcome bubbles / damage to the carpet.

The responsibility for the floor always lies with the customer, but if our installers find something strange, we always say yes and warn that the surface may cause problems.

In 2021, alternatives to those we recommend have emerged. Examples of these alternatives are and the experiences / views we have are:

• Just asphalt. Does not work, as the forces from the game become too great. Even if you use chemical anchors, there is a great risk that it will not last in the long run. Here, a portable solution with solid support legs is then recommended to withstand the wind loads.
• Asphalt/Concrete (hybrid). Few projects have been done with asphalt concrete and it seems to work. However, nothing that we have experience of how the floor surface behaves after 15/20/30 years, etc. Therefore we can not recommend it, alas if we realize / understand there is a lot of money to save (About 40-50% cheaper than ordinary concrete sole) . The net posts must, if the customer still insists on this solution, be anchored in concrete foundations (cut up the asphalt, dig out, reinforce and cast concrete) for the forces to tension the net place high demands on the anchorage of the net posts. Of course, in the same way as asphalt, a portable solution can be made and will then be a better solution than with just asphalt (it is possible to bolt in the asphalt concrete, which makes it more difficult for the structure to move).
• Concrete foundation (beams) with asphalt at the top (40-60mm). Made to save money and get a smoother asphalt, BUT helps to create a soft layer of asphalt between hard concrete and the iron (construction). This means that, in the long run, there is a great risk of unwelcome movements in the construction that can make up for it even with the durability of glass. In addition to the fact that it requires longer bolts (we at JuBo credit the cost of our normal anchor bolts, and the customer is responsible for obtaining the "right bolts" and possibly hats for these or painting the heads on the bolts). JuBo charges for the additional cost of putting these longer bolts and any extra work with hats / painting (time required) and requires a disclaimer on damage to construction / glass caused by this solution. To stabilize the asphalt, Densiphalt can be used, which binds the asphalt and makes it harder. However, the same disclaimer applies.