Approved Cemfloor installer
Cemfloor liquid screed
Cemfloor is a cement-based, self-levelling liquid screed made in the UK. It's the system we install on every floor we lay.
What is Cemfloor?
Cemfloor is a ready-mixed liquid floor screed with a cement binder. It's batched at the plant, delivered by truck and pumped onto the floor, where it flows level. Cemfloor is manufactured to the screed standard BS EN 13813, and comes in a range of strength classes for different uses.
Because it's cement-based, Cemfloor behaves differently from calcium sulphate (anhydrite) screeds. It can go in wet areas, and it doesn't form a weak surface layer (laitance) that has to be sanded off before flooring.
As an approved Cemfloor installer, we lay it to the manufacturer's installation and aftercare guidance: the right depths, membranes, edge strips and bay sizes for your floor.
Where Cemfloor is used
- Over underfloor heatingMinimum 25mm cover above the pipes. UFH screeding
- Floating over insulationMinimum 35mm in domestic buildings, 40mm in commercial.
- Extensions and renovationsPumped by hose, ideal where access is through the house. Extensions
- New-build housesWhole ground floors in a single pour, within the bay-size limits. New builds
- Wet areasCement-based, so suitable for bathrooms and wet rooms.
- Commercial floorsLaid to commercial minimum depths. Commercial
Cemfloor technical data
These figures come from Cemfloor's published technical data for Cemfloor Complete (2023 data sheet). Different Cemfloor products and strength classes vary, and we specify the right one for your job.
| Property | Manufacturer figure |
|---|---|
| Standard | BS EN 13813, CT-C25-F5 |
| Min. cover over UFH pipes | 25mm |
| Min. floating depth | 35mm domestic · 40mm commercial |
| Min. unbonded depth | 30mm |
| Max. bay without joints | 150m² unheated · 100m² heated |
| Light foot traffic | 24–48 hours, depending on conditions |
| Drying shrinkage (28 days) | Less than 0.5% |
| Surface regularity | SR2 minimum |
| Flow (target range) | 230–260mm |
Always check the current Cemfloor data sheet for your specific product. Drying time to floor coverings depends on depth and site conditions, so we don't quote a single number for it.
Cemfloor compared with other screeds
Against traditional sand and cement
Traditional floating screeds are usually laid at 65mm or more and finished by hand. Cemfloor can be laid thinner, flows level on its own and is far quicker to place, which suits pumped installation through a house or across a large new-build floor.
Against calcium sulphate (anhydrite) liquid screed
Anhydrite screeds are also pumped and self-levelling, but they're sensitive to moisture, aren't suited to wet areas and usually need sanding to remove laitance. Cemfloor, being cement-based, avoids those issues and is compatible with cement-based tile adhesives.
We specialise in Cemfloor cement-based liquid screed. If you're not sure which screed your floor has been specified for, send us the drawings and we'll check.
Got a floor to screed?
Send us the floor area and postcode and we'll come back with a clear written quote.