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Batons are 38mm deep screwed into poured concrete floor. Client has bought 25mm Celotex as he only had a choice of that or 50mm. Will the half inch or so air gap between Celotex and my oak floor being nailed to the batons make any difference?
Was insulation laid within the concrete floor? If so would just some fibre board underlay without the batons be easier?
What is the insulation trying to achieve? Is it the only floor insulation there is? Is there a vapour control layer? Is there a DPM incorporated into the floor make-up?
what mikey said!
#insulationwolf
if it were me, and not withstanding the above, I'd put the celotex so it had the gap between it and the concrete not it and the floor to let air circulate a bit over the concrete.
if it were me, and not withstanding the above, I'd put the celotex so it had the gap between it and the concrete not it and the floor to let air circulate a bit over the concrete.
The problem is that if you create a dew point where the batons are, water will settle around the batons and will eventually rot them away. You will need to lay a vapour control layer over the battens to prevent internal moisture getting through to the subsrate.
Ah, yes, well, y'see. Yes, there is a DPM within the concrete. It is then painted over with another waterproofing resin. So moisture isn't going to be a problem (not one I'll be snagging for free in a year's time anyway 😀 ). Concrete was poured 2 years ago. I have no idea what the Celotex is trying to achieve. Only that the client wants it and I'm being paid to cut and fit the shite.
I might just fire a dozen cans of expanding foam in there. 😆
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do not get your spray cream and expanding foam mixed up