Plenty of homeowners are sold to the idea of overlaying existing asphalt shingles for its convenience and affordability. Installing a completely new roof can cost a lot as the hassle of tearing off the old roof would take a long time and add to the labor costs. Additionally, there’s also the dumping fee for removing your old roofing.
However, adding a second layer of shingles isn’t a simple matter. The truth is that various variables have to be just right for it to work. There are times when it’s better to tear off the old roof and start fresh.
Here are some reasons why adding putting a new layer of shingles over the existing one is not a good idea.