9.FloorsInternal and external floors will be a minimum of 15cm reinforced concretepoured on top of a damp-proofmembrane. Concrete floors shall then be covered with hard wearing ceramic Ɵles.Slip resistant Ɵles shall be installed in the kitchen,bathrooms,and terraces.Control/Expansion joints shall be installed in the concrete slab/floorto prevent cracking due to expansion and contracƟon.ControlJoints shall be filled with compressible/expandable material. Floor Ɵle control/expansion joints shall also be installed where a floor Ɵle sites next to a concrete slab floorcontrol/expansion joint.Concrete Slab Control/Expansion Joint