Floor screed is a cementitious layer (usually sharp sand and cement, sometimes with fibres or additives) laid over a subfloor to create a smooth, flat, strong base. Its main job is to provide a level platform for the final floor finish tiles, wood, vinyl, carpet and more. In some modern or industrial-style spaces, screed can even be the finished floor, polished or sealed for a durable, clean look. Put simply, screed removes dips and bumps by smoothing out irregularities in the slab beneath.
What floor screed is used for
- Levelling uneven floors: fills low spots and flattens slabs so finishes don’t crack, bulge or fail.
- Creating a stable base for floor finishes: supports the final flooring and helps prevent movement, lifting or cracking over time.
- Encapsulating underfloor heating (UFH): screed is poured over heating pipes or mats, spreading heat evenly through the floor mass. Research suggests liquid screed has nearly twice the thermal conductivity of traditional mixes, improving efficiency, reducing cold spots and potentially lowering energy bills.
- Adding insulation and sound reduction: a floating screed can be laid over insulation and/or a damp-proof membrane to improve thermal and acoustic performance, supporting UK requirements such as Part L (energy) and Part E (sound).
- Heavy-duty and decorative finishes: fibre-reinforced, resin-modified or granolithic screeds can be used in warehouses/workshops for wear resistance, while coloured or polished screeds can deliver a decorative commercial finish.
Common screed types
- Traditional sand/cement screed: hand-laid, durable and versatile, but typically slower to cure (often weeks).
- Liquid (flowing/anhydrite) screed: pump-applied, self-levelling, very smooth, great for large areas and UFH, often walkable sooner.
- Self-levelling screed/compound: cement-based and polymer-modified, ideal for thin smoothing layers and quick corrections before floor coverings.
Why it matters (UK)
Quality screeding protects your finished floor and helps meet British Standards (e.g., BS 8204). At LMA Floorscreeding, we bring 15+ years’ experience, clear communication, tidy working, and reliable results across London and beyond with fast surveys and straightforward quotes.
Whether you’re laying a new screeded floor or upgrading an existing one, we’re here to help. Contact LMA Floorscreeding today for expert guidance and a fast, no-obligation quote and get the flat, durable floors your project needs.