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If you leave your cat's flap open, it may create draft. This is a challenge that many cat owners face. A draught excluder can help minimise cold air entering the house, but the cat flap that is insulated will offer more protection from the elements. Tomsgates has a range of cat flaps that are insulated and dog doors that can be used for any type of installation including wall installations. The Material Insulation is one of the most important characteristics of a cat-door. This is what will keep cold air