Is It Possible To Install Vinyl Siding Over Slate Material Without Taking The Slate Off The House?
Yes it is possible, but there are several descive factors involved.
1. Is it slate or the old asbestos tiles.
2. How thick is the slate.
3.will adding 1-3″ of extra wall interfere with windows or doors.
If not, all you have to do is lathe the wall vertically with 1×4′s every 16-24″ (no more) which will cover old siding and give you a nailer for vinyl.