https://articlescad.com/adding....-a-composite-door-ca
A door made of upvc with a cat flap can help to lessen the draughts inside your home. By keeping your pets warm and out of cold air, you will reduce heating costs. Although it is possible to install a cat flap on both upvc and double glazing sealed units, it can be more challenging than with doors made of timber. This is because upvc comes in various thicknesses. Benefits A cat flap installed on your door allows you to keep your pet inside or outside the house, while still permitting other people to enter. It also kee