https://elearnportal.science/w....iki/Upvc_Door_Panels
Are you tired of having to climb up to open the door to your pet. If so, a cat flap could be the solution. Pet-flap fitters can put them on any type of door, including uPVC or composite doors. They can also be fitted into a variety of wall types. Security Cat flaps are often installed on doors, but many also install them in windows or double-glazed doors. The installation of a cat flap into glass can be a good option if you don't want to cut through a wooden or wall door, and it's also an ideal solution for those who live