Floor Constructions and Underfloor Heating

by UFH1

Underfloor heating is a great addition to any home, lowering your energy bills and providing your home with a more efficient heat source. However, you might be worried about how to install underfloor heating, or if you can install underfloor heating with joisted floors. Well don't worry, here are examples of how you install underfloor heating with solid and joisted floors:

Solid floors

For solid floors, underfloor heating pipes are fixed to, or on top of insulation (depending on building control, seek advice from your local inspector), 50-75mm of screed is then poured over the top, as seen in the picture.

Joisted floors

In joisted floors we recommend UFH pipe is stapled to insulation fitted on battens in between the joists. We recommend laying a weak biscuit mix of sand and cement (8:1) around the pipes, between the joists level to the top of the joists. The biscuit mix gives the floor extra thermal mass; improving the overall output and performance of your floor heating system. Timber floors can be laid after and should not exceed 22mm in total thickness.

NB. Use of screed infill adds an additional 17Kg/m². Pipe would be at 100mm for heat pumps

Aluminium spreader plates-For joisted floors

We can also supply aluminium spreader plates for a multitude of joist dimensions as well as plates designed to be fitted from below.


Free CAD
Full Installation
Industry Leading
Best UK
Trade Rates
We Will Beat
Any Quote