If I use a Therma-Tru impact resistant entry system, does that mean that my glass won break when debris hits it?
No. The entry system is designed to prevent significant air leakage into the house when struck by debris. Preventing significant air leakage into the house minimizes the chance of the roof being blown off. The glass may break when struck and the door may be severely damaged, but significant air leakage should not occur. Homeowners’ insurance should cover replacement of damaged doors, a much more inexpensive solution than replacing the roof and possibly the whole house.
