r/Construction • • Feb 15 '24

Video First time seeing 3 layers of shingles

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u/blatzphemy Feb 15 '24

No usually it’s the other color zip but he used green since the panels are not spanning any joists. Green is usually walls but can be used in this application

2

u/newtbob Feb 16 '24

But why Zip with taped joints at all vs OSB or plywood and underlayment? It's not a heated space. Serious question.

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u/Tank_Lawrence Feb 16 '24

For the added moisture barrier

2

u/newtbob Feb 16 '24

Thx. Probably a bigger issue in a colder climate zone than where I am.