Metal shed - Roof condensation problem

TimMatrix · 25 Mar 2013 at 22:52

I am fed up of condensation on the inside of a metal shed, especially the roof, dripping water onto items in the shed, causing a bad mouldy smell.

How do one recommend to "insulate" the roof and what with, in order to keep out the condensation problem? I do not care how cold the shed might be, but I do want condensation to go away, thus keeping the contents nice and dry.

Any ideas? If there is a website showing some advice, or how to install something to keep condensaton at bay, I'd like to hear from you.

Many thanks.

TimMatrix · 26 Mar 2013 at 00:05

bitslice said:
Polystyrene sheet

spray glue
http://www.ebay.co.uk/itm/3M-77-Spray-Adhesive-500-ml-/251195052103

Also, improve the ventilation if you can, same principle as bathrooms.

Thanks, but the roof I have is not a flat type, more of a corrugated type, like this one...

The roof's similar corrugated as the walls.

TimMatrix · 26 Mar 2013 at 00:15

bitslice said:
I think they are all like that aren't they?
But yes, spray the lower corrugations and push the polystyrene onto it.

Ideally you would use spray foam, but that is ridiculously expensive.

Hmmm, thanks.

I will give a trial with a small segment covered with polystrene foam tiles and 3M glue spray.

If no condensation arises from that segment, then I will do the rest!!

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.