Electric Underfloor Heating Screed Thickness

Screed thickness over underfloor heating is generally about the minimum depths as most screeds can go to required thickness always check with each individual project.

Electric underfloor heating screed thickness.

This is the minimum before the screed becomes weak and the plus side you will save money in material cost and the underfloor heating system will heat up quicker. What s the minimum screed thickness for underfloor heating. One of the best screeds to use for this process is from instarmac s ultrafloor range. Laying screed thinner than the recommended minimum leave the floor open to failure.

When using traditional sand cement screeds the minimum thickness is 65 mm. 35mm to 45mm total depth of screed inclusive of pipe dependant on product chosen. Traditional sand and cement 1 3 1 4. This traditional screed mix is made up from sand and cement at a 1 3 5 ratio and is then spread onto the floor and allowed to solidify around the ufh pipes or cables.

Our systems are only 3 5mm in thickness making it a simple installation within any floor construction. 22mm total depth of screed. Below we have an overview of minimum thicknesses. The inscreed cable electric underfloor heating system is designed for installation in concrete screed thickness of 50mm to 100mm.

Underfloor heating mat 2 mats if over 10m 2. If you add fibre to the screed or you use stronger types of screed you can go down to a minimum thickness of 50 mm. Electric radiant underfloor systems use electronic cables that run under the floor to give off heat. Key steps to prevent floor screed issues.

Ideal thickness is between 65 mm and 75 mm approx however 100 mm thick screeds have been used successfully. The typical design life of screed is 50 or 100 years and with screed being laid outside that of the recommended depth will surely leave the screed short of its design. Nowadays most installers will use fibres to add strength and reinforcement to the flooring and will aim for a thickness around 75mm. 45mm total depth of screed.

This method requires a minimum of 75mm coverage otherwise cracking will occur. Wunda group if the pipes are housed in the concrete floor slab sometimes the case for new homes this is could be 150mm thick and give a reaction time of over four hours. The screed is put on top of a separating membrane which will be applied on top of the layer of underfloor heating. By selecting the correct screed we can go low as 40mm screed.