http://brewwiki.win/wiki/Post:....Cat_Flap_Installatio
uPVC panels are a durable and long-lasting alternative to composite doors. They are durable, efficient and fireproof. They are also reasonably priced and easy to maintain. A double-glazed sealed unit with a hole already made for the cat flap is the most convenient method to install an animal flap inside a uPVC sheet. This is more secure than cutting a hole 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 are also energy