Agilia™ Screed A can be used where the substrate is any of the folllowing: Concrete slab, pre-cast concrete ‑oor, tile, vinyl, insulation, thin carpet, timber or timber-based panel supports. For timber, chipboard or similar substrates the Agilia™ Screed A must be unbonded ensuring that the timber structure receives adequate ventilation via the underside of the ‑oor once the topping has been laid.