https://securityholes.science/....wiki/Cat_Flap_Fitter
The incorporation of a cat flap into your bifold doors can provide numerous benefits for both you and your feline companion. It can also prevent extreme cold or heat from entering your home. The first step is to measure your pet's measurements to determine the size of the flap you'll require. This will enable you to create a hole of the correct size for the flap. Outdoor Access Even those with no DIY skills can manage to install a cat flap on an external backdoor. This will cut down on the cost and hassle of hiring a carpenter or hand