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A door made of upvc with a cat flaps can help reduce the amount of draughts that enter your home. can save money by keeping your pet inside and letting the cold air out. It is possible to put cat flaps into both upvc panels and double glazing glass sealed units however it is more difficult than timber doors. This is because there are different thicknesses of Upvc. Benefits A cat flap placed on your door allows you to keep your pet inside or out of the house, while allowing other people in. It also keeps out stray cat