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If you're planning to put in a cat flap in your home, it is recommended to employ an expert tradesperson. DIY projects usually result in poorly-fitted pet flaps which allow drafts and result in more energy costs. SheffLOCK can be installed as a cat flap on all kinds of doors like wood composite, uPVC, composite, glass doors and even external walls. It takes about 2 hours to install the cat flap. Pet flaps cost money A pet flap permits your cat to come and go whenever it wi