If you have Double Glazing (aka DGU) we cannot cut a hole and fit a pet door.
We must either: have a new DGU made, with a hole in it, or replace the DGU with Single Glazing (if appropriate).
Safety Glass (commonly found in full panel doors) will have a mark similar to this, near one corner. We cannot cut a hole in Safety Glass. Instead, we must have a new piece of Safety Glass made, with a hole in it.
WHAT TO DO
When contacting us, please tell us if your glass is Double Glazing or Safety Glass, and provide us with height and width measurements in millimetres so we can provide you with a quote.