DIY Doctor UK DIY Forums

Hi, I'm a complete novice at DIY. We have suspended timber floor boards and wanted an easy way way to insulate them. A frieind suggested nailing wooden sheets on top of the exiting floorboards to stop the air coming through, maybe even with a polystyrene sheet in between.

I would be grateful for any thoughts on this, particularly whether this will cause and damp or condensation problems for the floor board

Thanks

Siraj

take the floor up and nail timber battens to each side of the joist, 50mm below the top of the joist. Cut and install hard board insulation 50mm between the joists and then relay the floor.
The airflow under the floor will dry any moisture, preventing condensation,
Laying insulation on top can be done, but this increases the finished floor height ,and it wont be as efficient, as the insulation will only be minimal

Thanks for the advice. Appreciate it.

Take up floorboards, tack fine netting under joists (the kind used to shield scaffolding is more than adequate). Lay any insulation you like except polyurethane as this will make joists sweat and may lead to problems later. Take a look here for further advice. http://www.which.co.uk/energy/creating- ... nsulation/