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PostPosted: Tue Jul 04, 2017 5:55 am 
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Morning all.

I recently had a wood stove installed but we decided to pull up the awful laminate and paint the floorboards. In preparation for next winter I want insulate the floor.

I have about a 3ft high space under the floor I can access. I did start fitting some celotex but the floor joists are all over the place width wise so am looking for an easier alternative.

Would foil bubble insulation on a roll be suitable? And would I staple straight across joists or go in and out? I'm conscious of allowing airflow that the timber may need too.

Thanks for the help.

O.


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PostPosted: Tue Jul 04, 2017 11:36 am 
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I would say carry on with the celetex. If you measure each piece as it is including any taper and then cut the celetex so the edges are bevelled inwards then you should be able to get each piece nice and snug.

38 x 19mm tile battens can be screwed on the joist sides so the celetex ends up flush to the top.

Alternatively I suppose you could screw tile battens down lower, then fit 11mm osb across. Then you could pour in loose fill insulation

https://www.insulationsuperstore.co.uk/ ... g-bag.html


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PostPosted: Tue Jul 04, 2017 1:15 pm 
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Netting over joists and lay 150-200 glass wool inbetween. Cheapest way and very effective.


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PostPosted: Tue Jul 04, 2017 1:43 pm 
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Having just done 170m2 of 200mm fiberglass between the joists I think I can say its hard work, the way I did it was to staple plastic mesh underneath the joists, you just put the roll down and then staple it a small way up the side of the joists, you don't have to do every inch the mesh I used is about 30cm wide, its used for laying on top of underground pipes/cables etc, available in blue red and green, I left gaps of about 60cm between each length of mesh, the fiberglass wont fall through the gap so don't make it too wide, I had an air nailer so a bit easier, the hard bit is you are bending over all the time. You could as suggested just lay the mesh over the top and tuck it all down with insulation, however I was aware that this could cause squeaking. However as you may be aware all my work was in vain the house burnt down earlier this year.


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PostPosted: Tue Jul 04, 2017 6:38 pm 
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With stevie here, let the netting sag down plenty between the joists and staple to the top or sides to hold it up.
Then roll the horrible stuff over.

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