Underfloor Heating from Barres

Solid Floor Detail

Screed Floor on Insulation
In this floor construction, the pipes are laid on top of insulation, and a concrete or self-levelling screed is laid, covering the pipe and creating the finished floor, ready for coverings of choice.

1. Floor Covering
2. Minimum 65mm sand/cement or 50mm self-levelling screed
3. Minimum 8mm edge insulation
4. Pipe fixed to insulation with clips
5. Insulation to building regulations
6. Damp-proof membrane
7. Concrete slab

Joisted Floor Details

Joisted Floor with Pipes Between Joists
This floor construction is most commonly used on joisted floors, as it allows installation of the underfloor heating with no change in floor level. Best used with flow temperatures >60°C due to the chipboard layer between the underfloor heating and the floor covering.

1. Chipboard or Hardwood covering
2. Dry sand/cement mix (6:1) also known as biscuit mix
3. Pipe fixed to insulation with clips
4. Minimum 25mm rigid board insulation
5. 9mm ply/sterling board
6. 25x25mm battens
7. Joists

Joisted Floor with Lewis Plates
This floor construction is best for underfloor heating in a joisted floor, when used in conjunction with a ground source or air source heat pump. It converts a typical joisted floor into a solid concrete floor and allows for the best transfer of heat.

1. Floor covering
2. Minimum 35mm (from top of Lewis Plate) sand/cement or self-levelling screed
3. Pipe fixed to Lewis Plates with clips
4. Lewis Plates
5. Joists (with insulation between if necessary)