We have a cottage that was built in the 70s. I had our asbestos tiles (tested by a company, some were 0.5% asbestos some were 2% asbestos) covered with quarter inch mahogany underlay and then sheet vinyl over top. We also have a popcorn ceiling in our living room that is almost definitely asbestos (we don't really want to test it, safer to assume it is asbestos) and we want to safely cover it up.
We had a contractor come in and say they would start by covering it with a primer of KILZ before hanging up half-inch drywall. Would one coat of KILZ primer be enough to safely start finding studs with a stud finder and marking the studs, or would multiple coats of the primer be needed, or would we need primer and then some sort of paint? Is it safe to spray KILZ primer on top of asbestos popcorn ceiling? Would a special type of paint be required to cover asbestos ceiling for safely marking studs, or would any paint (latex, acrylic, vinyl) be okay to cover the ceiling as long as it can be sprayed on?
Since popcorn ceiling is friable material we want to be as informed as possible and make sure we're going to be having this done right so it can be covered up as safely as possible. Any advice or information is greatly appreciated.
Here is a picture of our likely popcorn asbestos ceiling since a picture is worth a thousand words, along with a "crack" which is just drywall tape coming up from water damage a couple decades ago (I think we covered the crack with some paint before):
P.S. I believe we have a hand-cut roof, I'm not sure if that matters, I don't know any more detail about our ceiling studs or anything like that (are they 16 inch on center or 24 inch on center? not a clue) as our attic is covered with insulation (which also could be asbestos material...)