https://elearnportal.science/w....iki/Cat_Flap_Install
A door made of upvc that has a cat flaps can help reduce draughts in your home. You can save money by keeping your pets inside and the cold air outside. 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 due to the fact that upvc comes in different thicknesses. Benefits Having a cat flap fitted to your door is a fantastic way to keep your pet safe or out of the house while allowing visitors in. It also helps keep out
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