I'm having a large extension built with underfloor heating throughout.
The builder is fitting new suspended timber floors throughout and so there will be plenty of clearance for UFH pipework etc.
He's mentioned that for timber floors they fit the insulation and pipework in between the joints, screed over and fit chipboard on top.
I understand that this is will work, but would it be more heat-efficient to have the timber floor lower and then sandwich the 100mm insulation / pipework / 75mm screed directly on top?
Essentially - is it more thermally efficient to build the UFH as if it were on top of concrete (space permitting) than seemingly botching it between joists and with chipboard on top?
The builder is fitting new suspended timber floors throughout and so there will be plenty of clearance for UFH pipework etc.
He's mentioned that for timber floors they fit the insulation and pipework in between the joints, screed over and fit chipboard on top.
I understand that this is will work, but would it be more heat-efficient to have the timber floor lower and then sandwich the 100mm insulation / pipework / 75mm screed directly on top?
Essentially - is it more thermally efficient to build the UFH as if it were on top of concrete (space permitting) than seemingly botching it between joists and with chipboard on top?
