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Old 08-31-2009, 08:55 PM   #1
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2x 15# or single 30#?


Last underlayment question...honest!!

They are the same price and a roll of 30# covers two squares and 15# covers 4 squares. ABC will be delivering soon and I need to finalize the order.

Felt will be covering GAF peel and stick (entire roof) and concrete S tiles will be resting on battens.

3.5 in 12 hip roof.

I'm trying to get the most life out of my roof possible. Realizing that the shallow pitch could mean some wind blown rain under the tile, I'm trying to maximize the lifespan of my underlayment.

So...one layer of 30# or half lapped 15#?

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Old 09-02-2009, 03:13 PM   #2
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2x 15# or single 30#?


#30 but you still need to lap it.

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