https://output.jsbin.com/yifugatemo/
A popular option for homeowners A composite door cat flap provides an easy entry point for your pet. It also lowers the chance that unwanted critters will enter your home. But adding a cat flap your composite door requires knowledge and knowledge of the door's construction. Any structural modifications could compromise the integrity of the door, and also affect its thermal performance. Adding a cat flap to the composite door A cat flap allows your pet to leave and enter the house without letting in other animals or cats. It can also reduce heating c