In concrete screeded floors, the screed acts to diffuse the heat across the surface providing an even temperature at the floor surface.
Depending on the type of building, construction, standards, there are a number of methods of laying the underfloor heating pipes in concrete floor structures.
The most popular method of installation is as follows:
A concrete slab (or suspended beam and block construction) is laid over a damp proof membrane. A 20mm thick piece of insulation is fixed to the perimeter (external) walls, to a height to include the depth of floor insulation and screed.
Whilst the edging insulation may be on show it is covered by wall plastering and skirting boards.
Floor insulation is laid to the whole area, joints are taped to prevent the ingress of screed between the insulation boards. The floor is now ready for the underfloor heating pipework installation.
We recommend you use a 50mm layer of Polyurethane insulation. If there is not enough space for 50mm insulation, 30mm is recommended. We recommend Polyurethane as it out performs Polystyrene and its greater density allows use of clip fittings.
If you use polystyrene insulation (50mm) it is recommended that you install wire mesh on top of the insulation and tie the pipe to the mesh. For other floor constructions please contact our technical department.
