https://trade-britanica.trade/....wiki/Cat_Flap_Instal
A cat flap can create a draught if left open. This is a problem that many cat owners have to deal with. A draught-excluder can help reduce the amount of cold air entering the home. However, a cat flap will offer more protection from the elements. Tomsgates offers a variety of cat flaps insulated and dog doors that can be used for any kind of installation including wall installations. The Material One of the most important features of the cat door is its insulation. This is what will keep cold air out and warm air in. Insulat