https://securityholes.science/....wiki/Fit_a_Cat_Flap_
UPVC/PVCU is an eco-friendly material that is impervious to fire and UV. It also has a high insulation which reduces heating costs. It's a great option for homes in extreme weather zones. Fitting a cat flap into the door made of upvc is simple. Follow the directions that are included in the kit you buy. Benefits UPVC door panels are highly flexible and can be inserted into a variety of different frames. They are also immune to fire and UV radiation. This makes them a good option for homes located in extreme weather