https://funsilo.date/wiki/Why_....Install_a_Double_Gla
You're tired of having get up to open the door for your pet. If so, a cat flap could be the answer. Pet-flap fitters can put them in any type of door including uPVC or composite doors. They can also be fitted into certain types of walls. Security It is not uncommon to see cat flaps installed into doors, however there are many who have them installed into windows or double glazed doors. The installation of a cat flap into glass is a great option if you don't want to cut through a wooden or wall door, and is an ideal option