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Shingle to corrugated roof transition help needed!!!

11923 Views 4 Replies 3 Participants Last post by  jaros bros.
I have installed a polycarb corrugated roof over my deck. My problem is the fact that the house roofing (dimensional shingles) overlaps directly onto the roof. The deck roof is a slightly flatter pitch than the house roof. I have issues when the wind blows rain back up between the two roofing types. I have closure strips installed back underneath the shingles against the house sheathing. It does not seem to matter. The shingles overlap the corrugated deck roofing by 4-5 inches. Is this enough? Should I move the closure strips to the edge of the shingles & seal? Or would it be wiser to use some flashing in order to extend the house roofing further over the deck roofing? If it is the latter; should I use closure strips & seal there? This is my first time dealing with this particular problem; so I want to make sure I tackle the issue correctly before starting. Thanks!
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You might want to also try adding some Great Stuff, expandable foam in the recesses of the corrugations and then install the Bird Block or Closure Strips, which then can be sealed in place with a high grade sealant caulking.

I would wait until doing the caulking though, until I saw if that Great Stuff and Closure Strips did the trick, in case you have to disassemble it again.

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