What is floor screed?
A cement-based mortar layer spread over a concrete slab to create a flat, level surface for tile or other floor finishes to be applied.
Floor screed is the intermediate cement-based mortar layer installed between a concrete structural slab and finished floor materials such as tiles, vinyl, or timber. It serves to level and smooth the slab surface, which is rarely flat enough for direct tile installation, and provides a stable base for subsequent finishes.
A typical floor screed in Klang Valley residential and commercial work runs 25 to 50 millimeters thick, depending on the flatness of the substrate and finish requirements. The mix is usually a 1:3 or 1:4 cement-to-sand ratio, applied with a screeding board to achieve uniform thickness across the floor area. For marble or high-end tile work, contractors often specify a thinner, stronger screed to reduce any future deflection or cracking.
Curing time is critical to the performance of the finished floor. Standard cement screed typically requires 7 to 14 days of curing before heavy traffic or tile laying can begin, depending on ambient humidity and temperature. During this period, the layer hardens and bonds with the underlying slab. Accelerated or specialized screeds can reduce this window, though standard practice in the region favors allowing full strength development to avoid defects in tile adhesion and long-term stability.
Contractors often use self-leveling screeds to simplify installation on large areas, while traditional hand-applied screed remains common for smaller spaces or where precise height control is needed. Proper screed installation is fundamental to the durability of tile and marble floors, making it a standard step in any flooring project that begins with an uneven concrete base. A tile and marble flooring specialist will specify screed thickness and type based on the finish and substrate conditions.