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expansion of ridge vent
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  1. Roofing/Siding
    I've installed ridge vents (ridgevent II) and am preparing to cap them with asphalt shingles. As we all know, Phoenix AZ is hot... These vents were installed hot, with no space between them. In the am, at about 60 degrees, they are about 3/8 to 1/2 inch apart. I am not a physics major, nor...
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