https://squareblogs.net/server....santa3/replacement-u
https://jsfiddle.net/beeturnip9/b9ghak54/
https://telegra.ph/Cat-Flap-Double-Glazing-10-02-6
If you're planning to put in a cat flap inside your home, it is best to hire an expert tradesperson. DIY projects typically result in poorly fitting pet flaps that let in drafts or increase energy bills. SheffLOCK is able to install cat flaps on all types of doors, including wood, glass, uPVC composites and even external walls. It takes around two hours to put in a new cat flap. Cost of pet flap A pet fla