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https://marvelvsdc.faith/wiki/....Using_uPVC_Cat_Flap_
Installing a cat-flap to your home is a simple process. But, you'll have to be aware of a few things prior to beginning. upvc door panels with a cat flap can be installed without needing to cut an opening in your door or wall. Many glass suppliers offer them with holes already cut to fit the purpose of a pet-door. 1. Safety Cat flaps made of upvc are simple to install and can be adapted to different kinds of doors. They are weatherproof