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A door made of upvc that has a cat flap can help to lessen the draughts inside your home. By keeping your pets warm and keeping cold air out, you can save money on heating bills. Although it is possible to install a cat flap into double glazing as well as upvc sealed units, it can be more challenging than with doors made of timber. This is because upvc comes in a variety of thicknesses. Benefits Having a cat flap fitted to your door