My house is only 3 years old. So then in addition to driving the 4 nails too deep into the shingle, the ones that came off were two nails short of the required six. Didn't check the good ones that didn't rip off, only the ones that were laying on the ground the next morning. But now that makes me wonder about the rest of my roof. Might get an inspector to check that it was put in according to code.
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