Guest User
7/3/2005
new construction on NC coast (hurricane country), will use Bengel from New Bern to install standing seam steel roof over SIPS. what are design considerations? where to ventilate? 30# felt over decking?
Todd Miller
Classic Products, Inc.
7/4/2005
I do not know Bengel. Yes, I would ventilate. Some SIPs have ventilation built into them. If you don't use them, you will have to build a cavity beneath the SIPs or another roof over them with at least a 1" vented airspace. 30# felt is common underlayment though I would use a slip sheet such as red rosin paper over it. There are also some newer synthetic underlayments which act as slip sheet and underlayment.
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