Metal shed - Roof condensation problem

Nightglow · 29 Mar 2013 at 07:41

You can buy DIY spray your self foam kits, last one I seen used cost around £200- £300 though.

http://www.businessmagnet.co.uk/company/expandingfoam-135582.htm

http://www.foamseal.co.uk/diy-spray-foam/?gclid=CJ2nnq22obYCFUbMtAodPT4A1Q

Could always contact a few firms & see what they would charge to spray your shed, might be close to you doing another job, so saving costs.
You would need a minimum coating thickness of 25mm to stop the condensation.

Dublove · 10 Apr 2013 at 18:04

Diy Foam kits are not properly fire rated which is unfortunate. I have a steel roof on my workshop to do approx 60m2 and I have 4 quotes varying from £800 - £3000 for the same thickness of sprayfoam!

You could try Grafo Therm - http://www.grafoproducts.co.uk/index.htm apparently it works really well but you need good ventilation.

TimMatrix · 10 Apr 2013 at 22:01

Dublove said:
Diy Foam kits are not properly fire rated which is unfortunate. I have a steel roof on my workshop to do approx 60m2 and I have 4 quotes varying from £800 - £3000 for the same thickness of sprayfoam!

You could try Grafo Therm - http://www.grafoproducts.co.uk/index.htm apparently it works really well but you need good ventilation.

Lots of brilliant replies, many thanks guys.

As for this one, the Grafo Therm. This sounds interesting. Have you done that to your shed, or did you just googled it, found it, and posted it here?

I'd love to hear anyone having their comments on using Grafo Therm. Are they expensive? I am thinking of doing it myself, after donning the protective gear and hiring tools, of course. But would that tot up as cheaper than having someone doing it? Labour costs, etc.

I will email them (the company) sometime this weekend.

TBirdUK · 10 Apr 2013 at 22:33

I would use silver foil backed bubble wrap insulation, used it to insulate the inside of my van, fits around all surfaces, easy to glue and stops cold bridges (which causes condensation).
Its quite cheap per meter compared to other methods and does work.

bitslice · 11 Apr 2013 at 09:17

As per dublove, also look at Anti-condensation paint, only one supplier it seems but appears to be a similar idea.