I'm ready to shingle a new patio roof (16x10)the slope is just over 1:12.I live in central Texas, not much snow.I know shingle manfacturers (GAF) do not recommend shingles less then2:12, but if I double the felt/tar paper up should shingleing stillbe OK?Thanks..

Doesn't that answer your question?--Doug Miller (alphageek at milmac dot com)How come we choose from just two people to run for president and 50 for MissAmerica?

Can I use Shingles??

Dec 16, 2003 24 Replies

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AJScott 22 years ago

Eh, I'm still foggy on the original question. Is the person who posted the original question trying to get away with using shingles that are less than what the manufacturer recommends by using some other roof-sealing method and cuttin corners -- oppos, cost -- because he has a ton of some roof sealer crap sitting around in his garage, or something else?

Call me absolutely naieve, but the way I see it, major corporations who manufacturer shingles don't stay in business for a few generations by giving out bad advice about the best use of their own products. But that's just me. Think whatever suits your own self.

AJS

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Manny Davis 22 years ago

"Larry Davick" wrote in news:byQDb.410430$275.1287754@attbi_s53:

That's how I would do it. Just ice and water the whole roof and shingle it. But I wouldn't do it on a large roof section, because I have heard of cases where it failed. I have, however, done small porch roofs this way (including on my own house) and they didn't leak.

But it is risky, and if it leaks don't be surprised.

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minerva nine 22 years ago

Two words: channel drain. It's cheaper, it's easier to put up, and it will probably leak less than the shingles. M9

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Don Phillips 22 years ago

The building code typically requires a minimum 2:12 (I think) if you double the underlayment. You can go with a single underalyment when your pitch is at least 4:12.

Sincerely,

Donald L. Phillips, Jr., P.E. Worthington Engineering, Inc.

145 Greenglade Avenue Worthington, OH 43085-2264

snipped-for-privacy@worthingtonNSengineering.com (remove NS to use the address)

614.937.0463 voice 208.975.1011 fax

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Don Phillips 22 years ago

During a downpour, a 1:12 roof will not let the water flow fast enough and you will get water under the shingles.

Sincerely,

Donald L. Phillips, Jr., P.E. Worthington Engineering, Inc.

145 Greenglade Avenue Worthington, OH 43085-2264

snipped-for-privacy@worthingtonNSengineering.com (remove NS to use the address)

614.937.0463 voice 208.975.1011 fax

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