A. Your problems are common. I’ve seen shingles in a 50-mph wind that looked like the flip card section at a college football game. The tabs will not seal until there is a sunny day or two above 40°F. If there is dust blowing around before the shingles seal, it may coat the adhesive and they will never seal.
The adhesive on self-sealing fiberglass shingles seems to be their major problem. If it sticks well enough to hold the shingles on the roof, it may not creep enough to allow the roof sheathing to move with changes in moisture. The result is that the shingles split. The old organic shingles would creep within the shingle itself, but the...
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