Wood flooring insul...
 

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Wood flooring insulating underlay

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Offline  scruff9252
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We’re midway through doing a full downstairs Renovation just now - removing wall between kitchen / dining room, new kitchen, new fire the works.

We’re now choosing the flooring - 14mm thick solid beech is the preferred option. This is to laid over our concrete subfloor. I need a good insulated underlay and looking at xps.

Question becomes what thickness is enough? I don’t want to go too thin and have a cold floor. 5mm / 6mm or 10mm? It’s the whole downstairs so don’t have to worry about height transitions into any other rooms fwiw.

Is there any downside to going 10mm?

thanks.

 
Posted : 26/01/2025 3:14 pm
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Offline  ajc
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When you say 14 mm solid beech is that a thin beech layer on ply? Why xps insulation? Higher performance pir proably a better bet. And at that thickness all you are really doing is taking the edge of chill on the floor. The u value isn’t going to be great. Thickness is down to how tall you are and how near to the door frame you want to be. I assume you realise it will stuff up your stairs and you will be forever tripping on the different height riser as well as it not complying with building regs

 
Posted : 26/01/2025 3:50 pm
Offline  trail_rat
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Thicker is better in this scenario but all are doing minimal lifting on a non insulated slab

 
Posted : 26/01/2025 4:09 pm

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