You're Tired of having to climb up to open the door for your pet. If so, a cat flap could be the solution. Pet-flap installers can put them in any kind of door, whether it is uPVC, composite or composite. They can also be installed in certain types of walls. https://www.repairmywindowsanddoors.co.uk/barnet-cat-flap-installer-near-me/