https://pattern-wiki.win/wiki/....How_Much_Does_a_Cat_
If want to install a cat flap in your home, it is recommended to employ an expert tradesperson. DIY projects typically result in poorly fitting pet flaps that could allow in draughts or raise energy bills. SheffLOCK can be fitted as a cat flap on all kinds of doors, including wood, uPVC, composite and glass doors and even external walls. On average, it takes around 2 hours to install a cat flap. Pet flaps cost money A pet flap is an ideal option to let your cat move around as it pleases. However, if the flap isn't correctly in