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A door made of upvc that has a cat flap can help to reduce the amount of draughts that enter your home. By keeping your pets inside and cold air out you will save money on heating bills. While it is possible to install a cat flap into double glazing and upvc sealed units, it is more difficult than with doors made of timber. This is due to the fact that there are different thicknesses of Upvc. Benefits A cat flap that is attached to your door is a great meth