1. Heated screeds often need stress relief joints

If you cut the screed the day after laying, you risk cutting into the heating pipes. It鈥檚 better to form the joints with the edge of a steel trowel while the screed is still soft.

2. Check screed moisture content with a hygrometer before laying vinyl flooring. Or tape down 1m2 of polythene for 24 hours and if there is no moisture on the underside and the screed has not darkened, the floor should be ready for the vinyl.

3. When installing ceramic tiles or stone over underfloor heating systems, use a flexible adhesive that complies with EN 12004. When laying tiles on a heated screed, it is recommended that you use a de-coupling membrane.

4. When installing textile, wood or resilient flooring over underfloor heating mats, the mats should be covered with a flexible levelling compound, which must be at least 3mm above the heating elements.

5. The type of adhesive required for resilient flooring depends on the covering itself. Consult British Standard 8203:2001 and the manufacturer of both the adhesive and underfloor heating before installation.

Source

Construction Manager