At the risk of a book length reply, I am going to redo my roof this summer, and am wondering if it is better to remove the old asphalt shingles, or (as many people have told me) just lay the new shingles on top of the old. There is only one layer on the roof now.
JG from Exeter, NH
That is actually a great and very straight-forward question, with an equally great and straight-forward answer. You can generally lay a new roof over the old without any problems as long as:
Ideally, your or your contractor should repair, reseat, or (ideally) replace all flashing around chimneys, valleys, vents, etc. He should also cut off or replace any curling shingles so the new ones lay flat. If you have had ice dam leakage, he should also remove the bottom few feet of old shingles and install an ice and water shield right against the roof sheathing plywood. You can then be assure that your roof will have a long and healthy life!
COPYRIGHT 1999 G.G. ALONZY
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