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You'll need to hire a cat flap installer in order to install a pet door inside your uPVC or glass panel. They can also help with more sophisticated models, like microchip pet flaps. DIY attempts to install a pet flap can often cause issues like draughts and low energy efficiency. Professional tradespeople can save you from the hassle and expense of dealing with these problems. Cost There are many elements that could affect the cost of installing a cat flap. The type of flap you select, the surface you want to put it on and wheth