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What type of boarding above rafters


Moonshine

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9 hours ago, Thedreamer said:

 

Did you see the video? Are those bits that get lifted in, like SIPS panels but in a roof?

 

 

Yes I guess they must be some form of SIP panel. The interesting thing is that it is not a continuous panel the full length of the roof, an off thin panel was added at the top.

 

But for the point of this discussion id does appear to have a (probably OSB) sarking layer on top.

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the 20  houses built next to my current house.

making a small scheme  -built in about 1992 by robison &davison 

locally know as R&D 

or rough and dangerous 

they were all built with english type roof ,no sarking boards ,so there must be a loop hole somewhere or SE has assured planning that they will take wind loads ??

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so yes its not a new thing houses being built by the bigger builders not using sarking board roofs in scotland 

I suppose it could be a balancing cost factor between   more skinner trusses +sarking and   thicker ones and no sarking 

I doubt it will be a wind loading factor that sways big builders  on which way to build 

Edited by scottishjohn
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once i get to a plan ,that is one thing I will try to quantify .both on cost +insulation value 

difference between sips panels and fully trussed roof and all the insulation etc .

and then non sarking type roof as an option as well 

roof on in a day is very attractive part of the sips choice 

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