Why Remove Old Shingles?
Repairing your roof can be done after you remove old shingles, or you can shingle over one layer only. Shingling over too many layers can disrupt the airtight seal on your roof. Waterproof Integrity If you shingle over several layers, you may lose your waterproof seal and cause many more problems, including water leakage. Simply placing new shingles over leaky, old shingles may not solve a leakage problem. Reduce The Weight On Your Roof Putting too many layers of shingles on your roof can cause a weight load problem, since most roofs were only meant to hold two layers. The roof may get weak spots as the house ages. Damaged Shingles If the old shingles are damaged or curling in any way, it is best to remove them before putting on new shingles. It is important that the new shingles lie flat on the roof. Examine the Roof Deck It is a good idea to inspect the roof deck under the old shingles to see if it is in good condition. You will not be able to tell if it is warped or has soft spots u
