https://writeablog.net/hornver....se61/using-upvc-cat-
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 you with more sophisticated models, such as microchip pet flaps. DIY efforts to put in a pet flap often fail and cause issues such as draughts and low energy efficiency. A professional tradesperson can spare you the hassle and expense of dealing with these issues. Cost The cost of installing a cat flap could be affected by a variety of factors. The type of flap you select as well as the area you wo