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Continue up the roof, ensuring each upper course overlaps the one below it by at least two inches. It’s important to ensure all your underlayment lies flat before you fasten it to the decking. Ripples and lumps can telegraph through the shingles and may be noticeable from the ground. For the second row, cut the first shingle to start half a tab off from the edge to ensure the seams between shingles are staggered. This staggering pattern is essential for both aesthetic uniformity and effective water shedding. Additionally, consider informing your neighbors about the upcoming construction.
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