We have had a lot of storms this year, including a few hurricanes. For those that are concerned about how Critter Quitters fair during these storms, we have gone through about 10 including several Cat 3 hurricanes with no reported problems. The stainless steel screws, if placed properly, will bite through the PVC and provide a mount that wont come off without the whole roof coming off. The only units that may have a problem are XL units mounted to metal pipes, but if snugged tightly they probably not going anywhere.