https://perfectworld.wiki/wiki..../How_to_Train_Your_C
uPVC door panels provide a long-term alternative to composite doors. They are strong energy efficient and are resistant to fire. They are also affordable and easy-to-maintain. Ordering a double-glazed sealed unit that has already cut a hole for the cat flap is the simplest way to install the cat flap on a uPVC sheet. This is safer than cutting a hole into an existing glass panel. UPVC Doors are easy to maintain Unlike traditional wooden doors, uPVC doors don't require frequent painting or sanding. They are also ener