https://gotfredsen-lopez-2.blo....gbright.net/why-inst
https://www.openlearning.com/u..../choifry-slsd69/blog
Installing a pet flap on your French or Patio doors is a great idea if you own a dog or cat. It makes it easier for them to go in and out without you having to open the door. There are several options for cat flaps that are designed to fit into uPVC or composite doors as well as wooden doors. Some have a four-way locking system that can be set to leave only by entering only the direction of opening, or in both. Installation