Screed underfloor heating Heating (UFH) is a system in which water-based heating pipes are embedded in the floor screed. Heated water is then pumped through the pipes to heat the floor and the room. This is a highly efficient system and is primarily used in new build or commercial space.
A typical UFH system comprises of insulation that is laid under the concrete or slab subfloor, then an underlay that is laid over the insulation. Then the screed mix is applied either as a semi-dry formula that can be trowelled to a finish or as a liquid, free flowing mixture that is pumped to a prescribed thickness. It is important that all pipes are securely fixed to the underlay and, especially with flowing screeds, it is recommended that they are pressure tested at twice the working pressure.
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It’s also important that the design of both the underfloor heating and the screed mix are a good match. Having the same supplier for both can help alleviate problems that can occur when different suppliers are responsible for the different elements of a project.
Finally, a flooring of the client’s choice can be laid over the screed, which may be left exposed as a style feature. Often, though, the client will choose to have it covered with tiles or other finishes. The type of floor covering chosen can impact on the size of expansion and movement joints that need to be incorporated, so the heating can work effectively.