Cat Flaps In Gillingham

Attempting to cut a cat flap into an existing sealed double glazed unit is one of the most common mistakes homeowners make when trying to manage the job themselves or using an unqualified fitter. The sealed unit in a double glazed window contains an inert gas between the two panes and is factory-sealed to prevent moisture ingress. Cutting into the unit breaks that seal immediately, which causes the window to mist up between the panes. Once a sealed unit fails in this way, the only remedy is to replace the entire unit. A professional cat flap glazier in Gillingham avoids this entirely by supplying a purpose-made toughened glass unit with the flap already fitted, installing it cleanly without touching the original sealed unit.

An ill-fitting cat flap also creates practical problems that go beyond aesthetics. A poorly cut hole or a flap installed without the correct frame allows cold air, draughts, and water to enter the property. In the older Victorian terraces common across Gillingham, where draughts can already be a challenge in winter, a badly fitted pet door installation makes the problem noticeably worse. Professional fitting ensures the flap sits flush, the surround is sealed correctly, and the overall weather resistance of the door or window is maintained. This is also relevant when it comes to home insurance, as some policies require that any modifications to windows or external doors are carried out by a qualified tradesperson.

Montrose Glass carries out every cat flap in glass installation to the same standard we apply to all glazing work, including a full check of the surrounding frame and seal before we leave. You are not paying for a rushed fix. You are paying for a job that holds up over time. For broader context on what good glazing work looks like, see our Window Repair and Replacement service in Gillingham.