Thread: Purlins?
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Old 02-12-17, 09:36 PM   #2
DEnd
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Yes you can attach the roofing directly to the 2x4s, assuming the roofing is thick/stiff enough. Check with the manufacturer first. The biggest issue you have is flashing however. The roof wall intersection absolutely needs to be flashed correctly. To do that correctly you will likely be removing wall shingles/siding anyway at that point it's likely not a huge task to make the room you need to add back in the roof sheathing. the positive to that is it will likely lead to a better appearance for the roof ie: much less likely to get dents in it, and a flatter appearance for the roof in general.
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