repairing a ceiling from hurricane Florence . Should I square up the opening? I cut out where it was wet and on the one end you can see I went past the rafter by about 4 inches, should I just cut to the next rafter to make it easy to screw on or use a thing piece of wood between the seems or? [attach]103723[/attach]

A year-and-a-half ago we had our 1974 popcorn ceilings containing asbestos professionally scraped off. Unfortunately, although the company was licensed with the state, they left a lot of material inside our home. One of the rooms scraped was our garage. They definitely skimped the most on the garage. There are still patches of popcorn on the drywall. The problem is, we want to replace all of the drywall in our garage as it was damaged when we bought the hhouse.The company we got a quote from says they will need to demo all of the existing drywall since it is in poor condition. Being that this is in the garage, if I seal off the door to the house will that be enough to keep any potential asbestos fibers from entering our home? Is there a risk of that fibers could somehow get through the attic and into our rooms? Is there another option here? There is also still material on the lights and garage door that we are going to wet down and take care of before this begins. I just want all of this asbestos nightmare to be over.