Guest User
9/13/2005
I have a contractor that wants to use 1x12's as my roof and put the metal roof on over those. The question is, he wants to leave about 1 1/2 foot spacing between the 1x12's. Should this really be done?? Should a new roof construction have that large of a gap when putting the metal over it. I know that is not the case if I were using regular singles, but I am not sure about the Metal roof. Thanks!
Todd Miller
Isaiah Industries, Inc.
9/13/2005
There are some metal roofing products that can be installed that way. Many of them can't though. Some of the ones that technically can be installed that way, their manufacturers will say to not do that for a residential application. So, first and foremost, this question is answered by the manufacturer of the roofing. That said, my opinion, there is a big risk of condensation problems when this is done. If it is done, you will want a vapor barrier behind the ceilings, good insulation, and good ventilation. I'd prefer to see all of those things plus solid decking and a good underlayment personally.
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