Guest User
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
Isaiah Industries, Inc.
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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