https://opensourcebridge.scien....ce/wiki/Using_uPVC_C
http://brewwiki.win/wiki/Post:....Cat_Flap_Fitting_Nea
It is recommended to hire an professional to install a cat-flap inside your home. DIY projects typically result in poorly fitted pet flaps that can let in drafts or increase energy bills. SheffLOCK can be installed as the cat flap into all kinds of doors like wood, uPVC, composite and glass doors, as well as external walls. On average, it takes around 2 hours to install a cat flap. Cost of the pet flap A pet flap permits your cat to move around whenever it