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Discuss Low profile overlay wet UFH - screed, grooved gypsum or insulation? in the Water Underfloor Heating Installations area at PlumbersForums.net

Hi folks, my first posting and hopefully it's a sensible question. I'm doing a renovation and intend to heat with wet UFH supplied from an ASHP. I have to go for minimal build up because of head-room, so I'm looking at the various low profile systems. Insulation of the property will be OK, but not superb (wood fibreboard over the existing stone walls). I an looking to work with a build-up of 25-35mm (excluding floor-coverings) and it's going over a concrete slab.

The low profile options mostly seem to use 12mm pipe at 150mm centres but within them there are:-
1. castellated plastic plates that are screeded (Nu-heat, Profix, Robbens)
2. gypsum or similar grooved boards (Warm-up et al)
3. similar grooved boards that are made from XPS insulation, some with foil as a heat diffuser some with plates (Continental et al).

Has anyone got views on the performance of these various types of system. The flooring will be 50% tiles 50% engineered wood and I would expect to set the heating cycles to optimise performance.
 

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer

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