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Old roofer told me to never nail shingles too tight and he was right
Last summer I was doing a small shed roof and hammered the nails flush like I always did. The next day I saw three shingles cracked right at the nail head. Called up that retired roofer I know and he said leave a 1/16 gap for expansion. Fixed it on the second try and no cracks since. Any other tips from old timers that actually work?
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