Floor Constructions | Solid Screeded Floor

Solid Screeded Floor

Solid floor constructions are one of the simplest, most cost effective ways of installing ufh. The pipes are laid on insulation then covered with screed which acts as the best heat conductor making this system the most responsive. There are two types of screed that can be used over the pipes; traditional sand/cement or specialist Anhydrite (flow screed).

Where the pipe is laid on insulation with sand/cement screed the minimum screed depth must be 65mm for domestic and 75mm for commercial applications. The same situation with Anhydrite screed will only call for a nominal screed thickness of 50-55mm coverage.

All screed must be allowed to dry and cure normally in accordance with the relevant BS Standards* before initial heating and system start-up. UFH must not be used to speed up the curing process.

The two most common methods of fixing the ufh pipe to insulation are:-
Kombi Clip
Clip Rail & Clip

When installing onto floor grade insulation, pipes should be spaced 100mm away from the wall edges. In well-insulated domestic buildings the pipe centres are generally laid at 200mm centres across the active floor area (using 15 / 16mm pipe).

16mm pipe installed using staples

16mm pipe installed using clip rail