https://squareblogs.net/toilet....skiing11/why-install
uPVC door panels are a long-term alternative to composite doors. They are strong energy efficient, durable, and resistant to fire. They are also inexpensive and easy to maintain. A double-glazed sealed unit that has a hole already made for the cat flap is the most convenient method of installing an animal flap inside a uPVC sheet. This is a lot safer than trying to cut the hole in a glass panel. UPVC doors are easy to maintain Unlike traditional wooden doors, uPVC doors don't require frequent painting or sandi