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You'll need to hire an installer for your cat flap if you want to install a pet door in your uPVC or glass panel. They can also assist you with more sophisticated models, such as microchip pet flaps. DIY attempts to install a pet flap can often result in problems like draughts or low energy efficiency. A professional tradesperson can spare you the trouble and expense of dealing with these problems. Cost The cost of installing a cat flap could be affected by a number factors. The type of flap you select as well as the area