Terbat is a specific playing surface for indoor tennis courts and it provides identical playing conditions to traditional clay, while eliminating its inconvenience of annual maintenance.
This playing surface consists of a porous concrete/tarmac support without expansion joints secured by a classic foundation made of porphyry coated gravel by means of a very flexible cold poured hydrocarbon binder poured as a single layer of 5 cm thickness.
The Terbat surface is built up by successive sprays of crushed brick treated with hygrometrically (crushed slate+calcium chloride) which, thanks to its function as a fixing agent, prevents problems caused by the dust from the crushed brick.
The only maintenance required by Terbat is running the rake over it, sweeping the tram lines and watering the playing surface in summer.
However, you are advised to renew the hydrometrically-treated crushed brick every 18 months on average. This inexpensive measure prevents the formation of dust and improves the comfort of the game.
This cheap process is particularly well adapted to renovating old indoor courts without causing damage to the basic infrastructures.