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It is best to hire an professional to install a cat-flap at your home. DIY projects typically result in poorly-fitted pet flaps that can allow in draughts or raise energy bills. SheffLOCK can be installed as a cat flap on all types of doors including wood composite, uPVC, composite, glass doors as well as exterior walls. It takes about two hours to put in a new cat flap. Pet flaps cost money A pet flap is an ideal way to let your cat leave and come as it pleases. However, if the flap isn't correctly fitte