If it is in sensible condition and won’t interfere with the new roof, an old layer of shingles on the roofing can stay there. However, if you are opting for much heavier shingles or slate type of roofing system then…
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If it is in sensible condition and won’t interfere with the new roof, an old layer of shingles on the roofing can stay there. However, if you are opting for much heavier shingles or slate type of roofing system then…
