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A cat flap could cause a draught if it's left open. This is a common problem encountered by cat owners. A draught-excluder can reduce the amount of cold air that enters the home. However the cat flap can provide greater protection against the elements. Tomsgates offers a variety of dog doors that are insulated and cat flaps that work for any type of installation including wall-mounted installations. The Material One of the most important elements of a cat door is its insulation. Insulation keeps cold air out and warm inside. Insu