Fitting catflaps into either single or double glazing is problematical and often costly.  Where the ONLY option is to fit a cat flap into a double glazed door or window, the sealed unit has to be changed. A new double glazing unit with a circular hole has to be manufactured and fitted.These sealed units have to be ' toughened ' at manufacture. A replacement half door Double Glazed unit with a precut circular hole is anything between £150 and £250. Full height door glass can be £300 +

Single glazing is equally problematical. To cut a circular hole in situ is extremely difficult and carries a high risk of the glass breaking. It's often more economic to have a new panel of glass fitted with a precut hole.

I can only give advice if you want to keep the glass. Your local glazier has to quote for glass replacement.

HOWEVER, THERE IS ANOTHER SOLUTION - REPLACE THE GLAZING UNIT WITH A FLAT WHITE Upvc PANEL

You keep the Double Glazed unit. That goes back in if you move and you take your flap with you. The flap has the cats odour on it and gives them a sense of security at the new property.

Inclusive of a Petsafe 300 manual flap normally £180.00

 

Inclusive of a Sureflap microchip sensing catflap normally £220

 

 Full glass door costs around £350 all inclusive with a Sureflap

 

 Side windows can be converted to accommodate a flap,

For larger panels please supply measurements for a quote