Professional Cat flap installers will put your pet's entrance in either a door or wall. The wall-mounted version is more secure as an intruder cannot reach through. It also prevents draughts and reduces your energy bills. The Tasker will mark the location where the cat flap is in your door, https://www.repairmywindowsanddoors.co.uk/st-neots-cat-flap-installer-near-me/