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Do not do it! I have been roofing in Bowie for a long time. It used to say on the shingle wrapping that you need a 50-degrees minimum temperature to apply the shingles. This meant, where applied, so up on the black felt paper on the roof in the sun temperatures may be 50-degrees even
Bowie homes built by Levitt in the late 1960s, had 4 inches of fiberglass insulation with a paper vapor barrier originally installed on the attic floor. The current building code calls for approximately 14 inches of fiberglass attic insulation with a single vapor barrier. This can be achieved by installing an additional 10 inches of unfaced, no paper,
