https://telegra.ph/How-to-Inst....all-a-UPVC-Door-Pane
A double-glazed cat flap lets your pet to go in and out of the house without restriction. This can ease stress, increase their feeling of freedom and encourage active play and exploration. The pet flap hole is cut during manufacturing and then put in new uPVC doors and windows. It should not be installed into existing tempered glasses. Cost When you decide to install a cat flap in your double glazing, you have to think about the cost of installation. The cost of installation will differ according to the kind and size