Thin floor insulation

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orange_dodo

Original Poster:

694 posts

189 months

Friday 19th September 2014
quotequote all
Currently planning the renovation of my kitchen and dining room which involves knocking down the wall between the two.

The dining room is a suspended floor with decent but ugly floorboards and a ~1m gap to concrete underneath. The kitchen is half suspended wood and half concrete (its small, only 2.4x2.1m). There is also a 1.2m single brick extention which effectively extends the kitchen and connects it to the conservatory; it also has a concrete floor.

We'd like to insulate the kitchen, especially the single brick extention as much as possible as it is freezing in the winter. Planning to insulate the walls but the floor is causing a headache. Due to there being concrete and brick I have to put any insulation over the top. I want to lay down something thin so the floor isn't raised too much, but also insulating so your feet don't freeze in the winter. Intend on having something like QuickStep laminate over the top.

My builder has said that the QuickStep underlay will provide plenty of insulation but I'm not confident it will and would be annoyed if after all this if the floor was still freezing cold.

Has anyone got any experience of this or advice?

Salesy

850 posts

129 months

Friday 19th September 2014
quotequote all
Lay some 6mm Wedi board, this will help.

The other option is to lay some foam http://www.theunderfloorheatingstore.com/xps-stand...

Then drop some under laminate heating on it [url]http://www.theunderfloorheatingstore.com/underwood-heating-13-c.asp[url/]

Our kitchen was the same but we laid travertine, we wouldn't be without the heating even if it is just to take the chill off.

Pheo

3,341 posts

202 months

Saturday 20th September 2014
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Put 1cm of xps under our travertine kitchen floor (along with electric underfloor). Seems to do the trick of breaking the heat route. Although wood is a natural insulator anyway so you might find 6mm ok. Depends how much height you can loose!

DrDeAtH

3,588 posts

232 months

Saturday 20th September 2014
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25mm celotex bonded down with your new flooring on top

Renovation

1,763 posts

121 months

Saturday 20th September 2014
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Pheo said:
Put 1cm of xps under our travertine kitchen floor
Is XPS the same stuff as Celotex ?

Can you tile directly onto it ?

Pheo

3,341 posts

202 months

Saturday 20th September 2014
quotequote all
Renovation said:
Is XPS the same stuff as Celotex ?

Can you tile directly onto it ?
Pretty similar I think - celotex is a brand name iirc - the differwnce is I think celotex doesn't use air for creating the bubbles.

I tiled straight on top

Renovation

1,763 posts

121 months

Saturday 20th September 2014
quotequote all
I'll have to get googling - if you can successfully tile onto XPS / Celotex that'll solve my problem
(conc floor with no DPC or insulation)

Pheo

3,341 posts

202 months

Saturday 20th September 2014
quotequote all
I did have a dpc (I think anyway, but could be wrong. I used tile adhesive to bed in 1cm xps boards then tiled on top. No issues so far!