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If you want to install a cat flap in your home, it's best to hire an expert tradesperson. DIY projects typically result in poorly fitting pet flaps that can allow in draughts or raise energy bills. SheffLOCK can be fitted as the cat flap into all kinds of doors, including wood composite, uPVC and glass doors as well as exterior walls. On average, it takes about 2 hours to install a cat flap. Cost of the pet flap A pet flap is an ideal method to allow your cat to move around at will. If the flap is not correctly installed, it could allow heat escape from y