Can I fit a under floor heating in a suspended timber ground floor?
You can install under floor heating between the joists in suspended timber ground floors however, as there is less thermal mass, the heat output will be lower, approximately 70 80 W/m2 depending on floor make up and floor finish. Depending on how much you improve the insulation you may need to add some supplementary heat for those really cold days. The pipes are clipped to 50mm Kingspan or equivalent high density insulation at 100mm centres in joists packed with rockwool on top of sterling board or plywood fixed to the underside of the joists. The void on top of insulation and under floor boards is filled level to top of joists with sand cement biscuit mix. For more information link to section 4 in renovations.
