https://telegra.ph/Fitting-a-C....at-Flap-in-a-UPVC-Do
Professional cat flap installers can install your pet's door into either a door or wall. The wall-mounted version is more secure, since an intruder is unable to get through. It also helps prevent the spread of draughts and also reduces the energy costs. The Tasker will mark out the position of the cat flap on your door, and then make the corners of the frame. They will also sand the edges of your frame to give it a smooth finish. Microchip cat flaps A microchip cat flap is an easy and effective method to keep your pet inside