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If you leave your cat flap open, it could create a draft. is a common problem experienced by cat owners. A draught-excluder can help reduce the amount of cold air that enters the house. However the cat flap will offer more protection from the elements. Tomsgates has a wide selection of dog doors that are insulated and cat flaps that are suitable for all kinds of installations, including wall installations. The Material Insulation is one of the most important characteristics of the cat-door. Insulation