📐 BS 8204 Screed Formulations
Precision Floor Screed Supply in Watford
Premium sand & cement screed, fibre-reinforced screed, and thermal underfloor heating mixes custom batched on-site for residential extensions and commercial developments.
Laser-Flat, High-Strength Floor Screeds
We supply high-quality semi-dry sand & cement screeds batched volumetrically directly on your site in Watford. Our screeds create the ideal level subfloor for laying ceramic tiles, wood flooring, vinyl, carpet, or resin coatings.
Screed Types & Minimum Depth Guide (BS 8204)
| Installation Type | Recommended Mix Ratio | Minimum Thickness | Key Characteristic |
|---|---|---|---|
| Bonded Screed | 1:4 or 1:3 Cement/Sand + Bonding Slurry | 25mm – 40mm | Mechanically keyed directly to concrete base slab |
| Unbonded Screed | 1:4 Semi-Dry + Polypropylene Fibres | 50mm | Laid over a damp-proof membrane (DPM) separating layer |
| Floating Screed (Acoustic / Thermal) | 1:3 High-Strength + Fibres | 65mm (Domestic) / 75mm (Commercial) | Laid over rigid insulation board or acoustic quilt |
| Underfloor Heating (UFH) Screed | 1:4 Retarded Mix + Thermal Enhancer | 65mm (minimum 25mm pipe cover) | Optimal thermal conductivity, encasing pipes with zero air voids |
Why Choose On-Site Batched Screed?
- Extended Working Times: Retarder additives can be blended on site to give your screeding contractors 8 to 12 hours of open working time.
- Integral Polypropylene Fibres: Greatly improves crack resistance, surface durability, and flexural tensile strength.
- Zero Waste: Batch exactly the volume needed to screed your rooms without buying bags or disposing of dry mix surplus.