Forterra Thermalite Aircrete Tongue and Groove Trench Block

Forterra Thermalite Aircrete Tongue and Groove Trench Block is an excellent concrete block for constructing foundations. Or ideal for use instead of a cavity wall requiring a heavy concrete brick or block infill. Thermalite blocks are designed with tongue and groove joints and handholds for easy handling and offer high thermal insulation. They have good compressive strength as well as moisture resistance. They contain up to 80 per cent recycled content. Trench Blocks make life easier as they are slotted end to end and so have no perpend mortar. Lay using a thin bed mortar technique.