https://longshots.wiki/wiki/Through_Wall_Cat_Flap
The UPVC/PVCU material is eco-friendly that is resistant to fire and UV. It's also extremely well-insulated and can reduce heating costs. It's an ideal choice for homes in extreme climate zones. Installing a cat flap on a upvc door is relatively simple. Just follow the instructions which should be included with the kit you buy. Benefits UPVC door panels are extremely flexible and can be fitted into a variety frames. They are also immune to UV radiation and fire. This makes them an excellent option for homes in harsh weather areas. Moreo