http://brewwiki.win/wiki/Post:Fit_a_Cat_Flap_in_a_UPVC_Door_Panel Introduce your cat to the flap prior to installation to allow them to be familiar with the size and shape. Open the flap and let them explore it from every angle. Make sure that the cutout is square and even. Mark the screw holes and align them with the cat flap opening. The distance between the edges must be equal. Preparation Installing a cat flap in your home can be beneficial to the health and well-being of your pet. This is because it allows them to freely move between the indoors and outdoors without you having to allow them to enter or exit. It can also prevent them from fighting over litter boxes, cat food or the door to the house. The first thing that you'll need to do prior to beginning your cat flap install is make sure that you have the area ready for where it will be placed. It will be simpler to work if you remove any obstacles. You should also take away any furniture or decorations that might hinder your installation. You'll have to mark and measure the space where you intend to install the cat flap. This will stop you from making a mistake that could damage the door or wall. You should put the cat flap in a location that is easily accessible to your cats, but won't compromise your home's structural integrity. The cat flap can be set on the doorway leading to a locked space, like your laundry room or closet. This will stop the cat from soaring over it and you can keep your cats away from dangers. The flap for cats should be low enough for your smallest cat to use, as taller cats may struggle to jump through the flap. It is a good idea to employ a professional handyman when you have sliding doors or a sash window that is old-fashioned. Installing a cat flap in these doors and windows can be a challenge and mistakes can cause costly damage. A professional can install the cat flap with care and without harming the structural strength of the window or door. To determine the space for the ca