2 1/2 inch nails for original asphalt shingles?


Old 08-07-12, 10:01 PM
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2 1/2 inch nails for original asphalt shingles?

Half venting here, but wanted to ask seriously in case there is some consideration I have overlooked....

Making my first roof repair. It is a classic case study of why you need counterflashing and kickout flashing in order to avoid leakage. Previous posts have helped bolster my knowledge to undertake this. However....

When I pulled off the damaged shingles, I started to encounter difficulties. Despite the instructions for the GAF timberline series calling for four roofing nails (1.25 inch), I encountered a number of shingles with clusters of nails, and, more frustratingly, several cases of 2.5 inch standard construction nails being used. Both of these conditions made it difficult to remove existing shingles without damaging more.

Nowhere do I see this being a recommended technique. Was my builder's roofer just a lazy, or was there some other consideration that would make me use this technique when I reinstall?

And was an $8 piece of kickout flashing where the gutter and roof abutted the brick facade really that big a deal to omit???

Appreciate anyone's perspective, otherwise I am going with 4 nails per shingle....1.25 inch each!!!
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Old 08-08-12, 03:23 AM
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Standard construction nails should never have been used in roofing. The heads are not large enough. 2 1/2" nails on one layer is not called for, either. Check your GAF specs also. If they are architectural shingles, it may call for 5 nails. If 3 tab, then 4 would be correct. Do what ever they say as your warranty will ride on that.
Old 08-08-12, 06:38 AM
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Yeah, don't copy what was done but I don't think you were going to anyway
Old 08-08-12, 07:13 AM
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Thanks - wanted to make sure I wasn't losing it....
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