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General: Underfloor Insulation(wooden Floors)

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- CommentAuthorHoward Frey
- CommentTimeOct 15th 2007
I would like to insulate underneath my sanded and varnished pine floor boards without having to pull them all up first.

I had the idea of taking up a couple of boards and taking gardeners netting to the under sides of the joists then filling the space between the joists with rockwool insulation.

I'm just a little concerned that this would prevent any air flow to the underside of the f.boards as the joists are 100 mm deep and the rockwool 100 mm thick. the varnish on the top is Johnson's Traffic Cote.

Any thoughts advice much welcomed
- CommentAuthortony
- CommentTimeOct 15th 2007
As long as you leave a clear path for ventilation under the insulation you will be OK say 100mm min. 150+ better.
- CommentAuthorTerry
- CommentTimeOct 16th 2007
The floor boards are well ventilated from above, just make sure the bottom of the joists are open to the air from below.

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