I'm hoping you can give me a little info. I'm under contract to buy an old house (built in 1910) in southern CT. The inspector and I found ourselves up in the attic, and noticed that the stack vent terminates in the attic, and doesn't extend through the roof. Must have made for a very smelly attic. Anyway, we also noticed that the roof has three layers of shingles, and I believe that is one layer too many for CT building code. For some reason, the seller is refusing to extend the vent through the roof for us prior to closing, he is leaving that for us to repair. (This is an estate sale, the seller is in CA and I have to assume that he wants as little to do with home repair as possible)
My question is, is there a reason it would not have been vented to the outside when the house was built, or was the roofer just having an off day? Also, am I going to have an issue installing a roof vent through three layers of shingles? Thanks guys.