Sand and cement screed.

Sand and cement screed is a traditional cementitious mix laid as a smooth, level layer over a structural slab or insulation. It is used to bring floors to the required level and tolerance ready for the chosen finish, and is specified as bonded, unbonded or floating depending on the build-up.

Bonded screed is laid directly onto a prepared substrate with a primer or slurry. Unbonded screed is laid over a separating membrane that decouples it from the slab. Floating screed sits over insulation or acoustic layers and is common in modern build-ups, including above underfloor heating. The right system depends on the substrate, the project build-up and what sits beneath the screed.

Yes, where the underfloor-heating system is correctly installed, fixed and pressure-tested before the pour, and where the build-up, cover and commissioning sequence are suitable. Where required, underfloor-heating installation can be coordinated through a specialist partner ahead of the screed works.

Drying depends on depth, ambient conditions, ventilation and the finish that follows. Rules of thumb exist, but practical drying times should be discussed against the specific floor build-up and programme rather than treated as universal figures.

Preparation typically considers the substrate condition, any required damp-proof membrane or separation layer, insulation, pipework where underfloor heating is included, access and logistics, and protection of the finished floor. These are reviewed as part of the overall installation package rather than as a standalone service.

Yes, sand and cement screed is widely used on commercial projects, including phased programmes, zoned pours and follow-on trades, where the floor build-up and programme support traditional drying.

For straightforward traditional sand-and-cement work with a known area and depth, use the indicative estimate route to send the details for review. For larger or more complex projects, send drawings, bills of quantities, floor build-ups or specifications through the commercial quotation route.