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PostPosted: Tue Mar 21, 2017 10:27 pm 
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Hello all,

I have a property which has suspended floors, there are approx 20 airbricks that which provide ventilation to the sub-floor.

I recently redecorated the property and laid laminate flooring down with fibre board insulation underneath.

Problem: The floors are just too cold! Even when heating is on they hardly ever warm to a comfortable level.

Question:
How can i better insulate the floor WITHOUT lifting the floorboards? (they are tongue/grooved hence the reason i dont want to get into removing them).

Could i:
Lift current laminate and fibre board, fill the gaps between the Floor boards with DraughtEX and then lay down some foil insulation? Then add the fibre and laminate back down? The extra layer of the foil will add 4mm to the overall floor which is OK.

Or, i was thinking of adding heated flooring?

Lifting the current laminate off is not a big deal as majority of the rooms are still empty.


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PostPosted: Thu Apr 13, 2017 8:20 pm 
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The only way is to get back to joists and insulate in between.


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PostPosted: Fri Apr 14, 2017 10:44 am 
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Have you thought about a layer of this between the fibreboard and the laminate?

http://www.diy.com/departments/duralay-3mm-laminate-flooring-glueless-wood-flooring-underlay-75-m/551316_BQ.prd

There are different versions of it, but we had it in our kitchen and it seemed to do the job pretty well.


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PostPosted: Fri Apr 14, 2017 10:57 am 
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If you have access under the floor and a decent area to move around then you can stuff glass wool between the joists and staple some netting over to hold in place. Dirty job but cheap and very effective.


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PostPosted: Fri Apr 14, 2017 9:41 pm 
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steviejoiner74 wrote:
If you have access under the floor and a decent area to move around then you can stuff glass wool between the joists and staple some netting over to hold in place. Dirty job but cheap and very effective.



Best way, or either thick socks or slippers.


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PostPosted: Sat Apr 15, 2017 2:26 pm 
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steviejoiner74 wrote:
If you have access under the floor and a decent area to move around then you can stuff glass wool between the joists and staple some netting over to hold in place. Dirty job but cheap and very effective.



If this was new build we were considering; then as I understand it 100mm Celotex or equivalent would meet current building regulations.
Still on the 'access under the floor theme' foam insulation can be cut and fitted between existing joints.
While a more expensive and labour consuming job, the result is effective.
Thin timber rippings cut from scrap were tacked across the bottom of the joists at centres suiting the lengths of the cut boards.


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