I worked for one of the largest roofing manufacturers in the world and sold roofing shingles back in the 80's. That seal stripe does not have to be removed. The fact that you see the stripe is due to a faulty installation of the shingle. The roofer used an air nail gun to apply but did not place the nail in the correct position on the shingle. He either placed the nail inside the seal stripe or did not hold the nail gun in a position to allow the crown of the nail to be flat therefore not allowing the shingle course above to seal. I lost about 30 shingles off my home in North Labelle. The same situation occurred. I called the insurance company yesterday but plan to contact the warrantee dept in the AM. Yesterday I drove all over the neighborhood and only one other home had the same situation with shingles blown off. This is definitely a faulty installation of the shingle. I can assure you beyond any doubt. We should not have lost shingles if they were applied correctly.
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