Electric Underfloor Heating Screed Thickness

Here screed is being laid over warm water underfloor heating pipes to the correct depth in this install using products by the wunda group image credit.

Electric underfloor heating screed thickness.

Traditional sand and cement 1 3 1 4. Key steps to prevent floor screed issues. The screed is put on top of a separating membrane which will be applied on top of the layer of underfloor heating. 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.

By selecting the correct screed we can go low as 40mm screed. What s the minimum screed thickness for underfloor heating. 45mm total depth of screed. The inscreed cable electric underfloor heating system is designed for installation in concrete screed thickness of 50mm to 100mm.

35mm to 45mm total depth of screed inclusive of pipe dependant on product chosen. 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. When using traditional sand cement screeds the minimum thickness is 65 mm. Nowadays most installers will use fibres to add strength and reinforcement to the flooring and will aim for a thickness around 75mm.

These wires are often sold on a pre assembled mat which makes it. Underfloor heating mat 2 mats if over 10m 2. 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. Laying screed thinner than the recommended minimum leave the floor open to failure.

One of the best screeds to use for this process is from instarmac s ultrafloor range. 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. Below we have an overview of minimum thicknesses. Liquid screed depths calcium sulphate.

22mm total depth of screed. 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. This method requires a minimum of 75mm coverage otherwise cracking will occur.