Green Building Forum - floor build up over concrete slab Tue, 19 Dec 2023 06:44:46 +0000 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 floor build up over concrete slab http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17225&Focus=292157#Comment_292157 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17225&Focus=292157#Comment_292157 Tue, 05 Oct 2021 11:41:29 +0100 cremi I have an insulated concrete slab which I want to build up by 80mm.
It is a passive grade house extension that I need to build up to match existing house floor level.

I had originally laid battons on the concrete, then 18mm plywood as a sub floor. I had some water
ingress from a hot water cylinder which resulted in mold build up to the underside of the plywood, which I have since removed.

I am wondering whether to put in a screed or an insulated floating floor, such as kingspan panels. My floor finish will be 18mm engineered timbers.

Will the Kingspan panels work in this case? I didn't use any DPM over the concrete slab initially, but I think the issue was caused by the un-ventilated void between battons (airtight building). By eliminating the void, will this prevent any future mold build- up?

Thanks]]> floor build up over concrete slab http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17225&Focus=292169#Comment_292169 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17225&Focus=292169#Comment_292169 Tue, 05 Oct 2021 22:04:18 +0100 tony
Engineered wood will need a substrate like sheets of t&g chipboard or ply]]> floor build up over concrete slab http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17225&Focus=292172#Comment_292172 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17225&Focus=292172#Comment_292172 Wed, 06 Oct 2021 07:36:15 +0100 GreenPaddy floor build up over concrete slab http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17225&Focus=292174#Comment_292174 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17225&Focus=292174#Comment_292174 Wed, 06 Oct 2021 09:46:32 +0100 cremi So, the screed seems to be the preferable option.

Thanks for comments.]]> floor build up over concrete slab http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17225&Focus=292183#Comment_292183 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17225&Focus=292183#Comment_292183 Wed, 06 Oct 2021 21:28:04 +0100 tony