It is currently 28 Mar 2024, 14:14
MattS wrote: Roof is metal with a costing of some sort but very easily I can insulate with Kingspan type, air gap above and osb underneath so feel
I can get it to an acceptable level of dampness!
9fingers wrote:One way to deal with metal or other sheet roofing is to spray the underside with closed cell expanding foam designed for the job. This puts a water proof insulating layer in intimate contact with the cold surface of the sheet and no condensation is formed.
I think there are DIY packs of the two part chemicals needed to apply the foam but I don't think it is cheap. I would imagine it needs to be built up in layers to prevent great globs of semi wet foam dripping everywhere. Plenty of scope for making a real mess methinks.
Bob
Tusses wrote:9fingers wrote:One way to deal with metal or other sheet roofing is to spray the underside with closed cell expanding foam designed for the job. This puts a water proof insulating layer in intimate contact with the cold surface of the sheet and no condensation is formed.
I think there are DIY packs of the two part chemicals needed to apply the foam but I don't think it is cheap. I would imagine it needs to be built up in layers to prevent great globs of semi wet foam dripping everywhere. Plenty of scope for making a real mess methinks.
Bob
yeah .. had my narrowboat sprayfoamed .. very very messy ! .. wouldn't want to try it in a working shop !
Something to consider at the build stage
still .. if it comes to it !
9fingers wrote:Ah Rich if you are thinking about this at the build stage, then you can buy a laminated shallow corrugated sheet which is a sandwich of metal/foam/metal. Quite light to handle and no condensation problems. I had a couple of buildings put up at work like this and it works well. You can get skylights that integrate into the profile too so you can keep solid wallspace for hanging storage on and still get good natural lighting.
Bob
Tusses wrote:I was thinking more of the OP .. if he can work it into the design to sprayfoam/have it sprayed
I think the boat was a about £1500 .. . 57ft long x 6'high,6'wide .. roof and walls done so 57'x18' ish
MattS wrote:
I know metal is the worst for condensation, if there was an air gap, then a good layer of insulating panel and OSB below so keeping warm and cold apart not keep condensation down to a minimum?
MattS wrote:So the garage is up
I've bought Wickes liquid damp membrane, because it was half the price of Synthaprufe! I'm struggling to find an answer to whether I need to take care covering the mastic/sealant used between the panels. The Synthaprufe data sheets and Google have not helped. No mention of anything I can't over paint with it. Any ideas?
MattS wrote:Thanks Bob, I was hoping I could get straight on with it today... Should have called the technical services line Friday!
TrimTheKing wrote:Nice space mate, quite tidy too. Enjoy, and keep this post up to date.
RogerS wrote:Harrumph....that floor is far too clean
Mike G wrote:I really would have insulated before filling the space.
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