I had the ensolite detaching from my ceiling as well. I cut a small slice in the ensolite at the area of the "bubble" and used a spray contact cement with the tube from a wd40 bottle to get it inside the bubble. Go all around the area with spray, push the ensolite against the
fiberglass and pull back. Let dry for 10 to 15 mins and push the ensolite back on. When done use a latex caulk to hide the cuts. I'm in Maple Ridge. PM me if you want to see how mine turned out.