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 Post subject: Roof
PostPosted: Wed Aug 30, 2017 8:54 am 
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Morning all. I'm replacing the roof on my shed. Its 14'x13' and I'm using Coroline bitumen corrugated sheet. For the roof deck I've chosen 18mm OSB3. Is that too thick/heavy (35kg per sheet) or should I use 15mm or 11mm?


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 Post subject: Re: Roof
PostPosted: Wed Aug 30, 2017 11:21 am 
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Do you need the OSB under the Coroline sheets?

I have a similar product (don't know the make) on a small shed ( I think it's 8 X 6) and the sheets are supported at either edge and also by two very small purlins running the length of the roof.

If I had to board it, I'd use WBP ply rather than OSB.

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 Post subject: Re: Roof
PostPosted: Thu Aug 31, 2017 2:36 pm 
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Thanks for that. I think I'll use ply. The reason for decking it out is because its only a 5 degree pitch and the specs call for that. They (Coroline) say use 18mm if nailing but think I'll use 12mm and screw it down to keep the weight down. Any thoughts appreciated. Sorry for late reply by the way.

Ken


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