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A popular option for homeowners A composite door cat flap offers a secure entry point for your pet. It also reduces the risk that unwanted critters will enter your home. However, adding a cat flap your composite door requires experience and knowledge of the door's composition. Any structural changes can weaken its integrity, and affect its thermal performance. Include a cat flap to a composite door A cat flap allows your pet to move around the house without allowing other animals or cats. It can also reduce heating c