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Re: Take the old off or leave it on ,that's my question
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ventilation is now critical so your roof won't sweat. don't know what the specs are where you live, but a good rule of thumb is one AF50 roof vent for every 600 sq ft of living space
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My contractor put on ventilated cap shingles, so no holes in the roof* except for the plumbing vent. It did have one of those wind turbine things.
* my chimney is at the eave so just a square notch
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Current/past Chevy/GMC trucks:
1958 Chevy C-60; 1965 GMC C-50; 1965 Chevy C-10; 1971 Chevy K-10; 1973 Chevy K-20; 1976 GMC C-20; 1977 Chevy C-10 Suburban; 1980 Chevy K-10; 1989 Chevy K1500; 1991 GMC V1500 Suburban; 2016 Chevy K2500 HD
Other vehicles: 1988 Jeep XJ; 2011 Toyota 4Runner
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