https://wifidb.science/wiki/Up....vc_Door_Panels_With_
uPVC door panels provide a long-term solution to composite doors. They are strong, durable and resistant to fire. They are also reasonably priced and easy to maintain. A double-glazed sealed unit with an opening already cut for the cat flap is the simplest way to install the cat flap on a uPVC sheet. This is much more secure than trying to cut holes in an existing glass panel. UPVC Doors are easy to maintain Unlike traditional wooden doors, uPVC doors don't require frequent painting or sanding. They also use less energy and can