https://lovewiki.faith/wiki/Ca....t_Flap_Installation_
uPVC door panels provide a long-term alternative to composite doors. They are durable energy efficient, durable, and fireproof. They are also inexpensive and easy-to-maintain. Ordering a double-glazed sealed unit that has a hole already made for the cat flap is the most convenient method of installing a cat flap in a uPVC sheet. This is more secure 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 also use le