If anyone would be so kind to help me be a bit more informed with contractors, by giving their advice I’d be much obliged! I have a GC that I somewhat trust handling some home improvement projects (painting and roofing). My house’s original roof is almost twenty years old. When the house was built (not by me) the roofers put up basic three tab asphalt with no underlay of any kind. It needs replacing. The roofer says it’s a waste to pull up the old roof and wants to lay over the old. As well, he says I don’t need an underlay as the old shingles will do that. I spec’d GAF Timberline Ultra shingles. I thought that I’d need GAF Shingle-Mate as well but he says no. Should I insist upon it? I have no problem paying the extra labor to have it done. It seems to me to be the proper way to go. Yes or no?
Thanks in advance,