Floor Screeding
Traditional Screed on UFHS
Contrary to much speculation, traditional screed is very suitable to underfloor heating. It can be modified to reduce drying times dramatically and has a very good adhesion levels for tile adhesives. This means that tiles can be applied using just a good flexible adhesive for underfloor heating systems. Because traditional screeds, are normally laid to be about 50% thicker than flowing / liquid screeds, they are able to hold more heat allowing for a smoother transition between heating periods. This also eliminates ‘cold spots’ between the pipes, which are normally placed at approx 200mm centres, in a modern thermally efficient home. Having cold spots in your underfloor heating can be quite disappointing. Cold spots will appear where the screed is thin and where thermal conductivity is high, such as a thin flowing screed. Because the anhydrite flowing screed is expensive, the only way to keep costs down are to apply the flowing screed thinly. This can cause problems when there is any irregularities with the concrete slab below.
Just because a thicker traditional floor screed may not be as thermally conductive as a thin anhydrite screed, doesn’t necessarily mean that the underfloor heating system will be less efficient. It just means that the warm-up and warm-down times will be slightly longer. It may just mean that the heating on/off times might need to be set 5-10 minutes earlier. Some recent reports show that traditional screeds are more thermally effective than flowing screed.
Thermal Mass
Many Eco-homes rely on thermal mass to store the heat energy throughout the day. This may be done with the use of a wood burning boiler or ground / air source heat-pump powered, or part-powered, by solar energy. The thicker the thermal mass the more energy can be stored throughout the day. If thermal mass heat storage is what is wanted to be achieved, then it would be best to start with at least 100mm of early, or fast, drying traditional fibre-screed.
Welcome to the ADH Flooring Limited Web site. Our aim is to provide you with useful information about our company and the screeding services that we supply.
ADH FLOORING has been supplying screeding services to the building industry since 1990 and became a limited company in 2007. We stared installing underfloor heating in 2003 and now specialize in underfloor heating & traditional, fibre-enriched, sand & cement floor screeds, and use many specialized admix products to enhance the floor screeds.
We supply, and install, high quality underfloor heating systems. These UFH’s can be fully controlled with the use of a smartphone or tablet device. You may be pleasantly surprised how little it may cost. We love underfloor heating and wish every home could have it. So we try to make it affordable to all.
Thank you for visiting.
Pex Al Pex 16mm x 2mm underfloor heating pipes installed at 150mm centres in a spiral pattern
A moisture barrier is required to keep the floor screed separated from the foiled insulation. Otherwise the screed will dissolve the aluminium foil. This is also known as separation layer and vapour barrier.
We install your pipes in a manner that spreads the heat evenly and avoids any cold spots.
Pressurizing UFH manifold and pipes to 4 bar using compressed air
Traditional TRUscreed (30N + PP fibre) topping with a powerfloat finish
ADH Flooring Ltd Underfloor Heating & Floor Screeding Contractors 01909 489915
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Site last updated 13 October 2016