"It is not against the law, but in SOME areas there is a requiremnt that an owner cannot apply a third layer over two existing layers."
This is where I become a little confused, new york state law says the following:
Section R907.3 of the NY State Residential Code:
"New roof coverings shall NOT be installed without first removing existing roof coverings where any of the following conditions occur:
1. Where the existing roof or roof covering is water-soaked or has deteriorated to the point that the existing roof or roof covering is not adequate as a base for additional roofing.
2. Where the existing roof covering is wood shake, slate, clay, cement or asbestos cement tile.
3. Where the existing roof has two or more applications of any type of roof covering."
Reading this seems to me that it is illegal to "install" a 3rd layer of roofing. Not nescessarily illegal to posses a 3rd layer. Implying the installer of the roof would be liable, not the home owner.
I'm not too concerned, structurally, the building inspector said there was no signs or warpage or stress, but he also said the new roof was 3-5 years old, he said over time (10+ years) significant warpage and sagging can occur with all the weight. He suggested I sister-up every other struss or so to reinforce the roof, at the very least he suggested vertical supports from the rafter to the trusses to help better distribute the load.
My only concern is it is a legal 2-family, currently set up as a mother/daughter. After closing I'd like to set it up as a 2 family, meaning I have to seperate some utilities (add an electric service for the apartment). I know the electric service has to be inspected, I also don't know if I need two CO's for each apartment, or just one for the house? I will do what I need to do to get things rolling, but I don't want an inspector to come and tell me I need to spend $15k to replace a roof.
Thanks for the input,