Timber Suspended Floors
 
Timber suspended floors do not conduct heat as efficiently as screeded floors. This means that the heat output is less.
 

Some manufacturers use heat emission plates to try to achieve an even temperature on the floor. This is a very expensive way of installing underfloor heating in timber suspended floors and at the end of the aluminium plate the temperature is not going to be very high. Clearly there should be a cheaper solution that works without using the very expensive aluminium plates. After all the first floor is usually timber suspended and on the first floor less heat is usually required.

 
The Henco system is very simple and easy to install in timber suspended floors. The system is based on hundreds of installations that are now working with total satisfaction.

Between the joists, a 50mm polyurethane insulation board is cut for a tight fit. It is advisable to use scrap battens from the building site to support the insulation from below.

 
 
The pipe is then clipped on the insulation with our special pipe clips. Then the floor boards are laid on top of the joists. Be careful not to leave too much air space between the insulation boards and floor boards (25mm is recommended). The joists need to be notched where needed for pipe runs.
 
 
For ground floor timber suspended or buildings 20 years or older we recommend:

To get the timber suspended floor to act as a screeded floor and to give out more heat, the air gap between the insulation and the floor boards should be filled with a lightweight screed mix. The infill is normally required for older buildings. Henco highly recommends the infill for all ground and first floor applications if the building is not built to current building regulations.
 
 
The mix consists of a 10:1 sand/cement or 8:1 'Lytag' lightweight aggregate/cement mix on top of the insulation, with enough water to hold the mix together. The additional load imposed on the floor by the mix is approximately 18kg/m2 for sand/cement mix. Note that the mix is not intended as load bearing, merely as a heat conductor. The thickness of the mix should be 25mm with the pipe included in it.