https://yamcode.com/upvc-door-....panels-with-cat-flap
https://www.openlearning.com/u..../lerchekearns-slu49n
It is best to employ an professional to install a cat-flap at your home. DIY projects often result in poorly fitted pet flaps that could allow in draughts or raise energy costs. SheffLOCK can install a cat flap on all kinds of doors, including wood, uPVC composite, glass and even external walls. It takes about 2 hours to install a cat flap. Pet flaps cost money A pet flap is an ideal way to let your cat come and go at will. If the flap isn't fitted co