That's very interesting as my brother is having a fit that we have to put holes in the roof again after redoing it. BUT, after just a short glace at the mount, I wonder if they are sturdy? We get some pretty high winds, couldn't it tear the shingle off? Is that all that's holding it on pretty much? And wouldn't lifting the shingle also defeat the purpose of possible water leakage? Once it's loose it's loose. I just don't want to buy one and be unhappy with it.....