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Cat flap in glass door?

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  • 13-05-2019 6:17pm
    #1
    Alkers
    Registered Users Posts: 6,811 ✭✭✭


    Is the above possible?
    We have French doors and each door has a full height glass pane (double glazed). Is there any way of adding a cat flap or are we looking at new glazing or a new door?


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    #2
    colm_mcm
    Registered Users Posts: 73,382 ✭✭✭✭colm_mcm


    It’s certainly possible. There are companies who will supply a double glazed unit with the hole taken out of it for a cat flap,


    https://www.cornelscourtglass.ie/cat+flaps.html


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    #3
    Alkers
    Registered Users Posts: 6,811 ✭✭✭Alkers


    colm_mcm wrote:
    It’s certainly possible. There are companies who will supply a double glazed unit with the hole taken out of it for a cat flap,

    That's a new piece of glass? Not possible to cut the existing I assume?


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    #4
    colm_mcm
    Registered Users Posts: 73,382 ✭✭✭✭colm_mcm


    No, they need to have a spacer bar bonded between the 2 panes of glass where the flap is. Also you can’t just cut a hole in toughened glass.


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    #5
    antiskeptic
    Registered Users Posts: 9,555 ✭✭✭antiskeptic


    Simona1986 wrote: »
    Is the above possible?
    We have French doors and each door has a full height glass pane (double glazed). Is there any way of adding a cat flap or are we looking at new glazing or a new door?

    As has been said: not possible in an existing dg panel (toughened or otherwise)

    It wouldn't be a big deal to knock a hole in the wall though, depending on how thick it is. Friend did it. You'd need outside ground level to match inside ground level (perhaps building it up with a stack of patio slabs if not) to enable the cat to land on something rather than dangling 3ft over ground.

    A little careful kangohammer work would make the hole without damage to the surrounding area. After than, fit the cat flap. A few hours work for the right person.


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    #6
    GrumpyMe
    Registered Users Posts: 1,195 ✭✭✭GrumpyMe


    Simona1986 wrote: »
    Is the above possible?
    We have French doors and each door has a full height glass pane (double glazed). Is there any way of adding a cat flap or are we looking at new glazing or a new door?


    How much do you love your cat? :)
    You could shorten the height(at bottom) of the glazed part on one door. Install new shorter double glazed unit above and fill the shortfall with panel to match door frame. Install catflap in panel. It will ruin the look but puss is probably worth it! :D


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    #7
    Lumen
    Registered Users Posts: 31,008 ✭✭✭✭Lumen


    antiskeptic wrote: »
    As has been said: not possible in an existing dg panel (toughened or otherwise)

    It wouldn't be a big deal to knock a hole in the wall though, depending on how thick it is. Friend did it. You'd need outside ground level to match inside ground level (perhaps building it up with a stack of patio slabs if not) to enable the cat to land on something rather than dangling 3ft over ground.

    A little careful kangohammer work would make the hole without damage to the surrounding area. After than, fit the cat flap. A few hours work for the right person.

    I've been meaning to get this done myself.

    Would something like a 220mm core drill do a cleaner job? I see there are microchip cat flaps which recommend a 212mm or greater hole, which would leave enough clearance to sleeve it properly.


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    #8
    Muahahaha
    Registered Users Posts: 19,610 ✭✭✭✭Muahahaha


    colm_mcm wrote: »
    It’s certainly possible. There are companies who will supply a double glazed unit with the hole taken out of it for a cat flap,


    https://www.cornelscourtglass.ie/cat+flaps.html

    jesus that gave me a laugh, I would never have thought there would be a window company out there who literally specialises in retrofitting cat flaps into glass doors yet here we are, what a time to be alive :D

    On the topic would fitting a flap like this perhaps dramatically reduce the thermal loss performance of a double glazed glass door?


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    #9
    antiskeptic
    Registered Users Posts: 9,555 ✭✭✭antiskeptic


    Lumen wrote: »
    antiskeptic wrote: »
    As has been said: not possible in an existing dg panel (toughened or otherwise)

    It wouldn't be a big deal to knock a hole in the wall though, depending on how thick it is. Friend did it. You'd need outside ground level to match inside ground level (perhaps building it up with a stack of patio slabs if not) to enable the cat to land on something rather than dangling 3ft over ground.

    A little careful kangohammer work would make the hole without damage to the surrounding area. After than, fit the cat flap. A few hours work for the right person.

    I've been meaning to get this done myself.

    Would something like a 220mm core drill do a cleaner job? I see there are microchip cat flaps which recommend a 212mm or greater hole, which would leave enough clearance to sleeve it properly.

    The core will be round, the catflap frame square. You'd need to core the diagonal dimension of the catflap leaving gaps to fill top and sides.

    I'd hire a 9" angle grinder and diamond disc to cut the square deep as possible both sides, then kango the rest. You'd have a bit of filling of the slice marks which extend beyond the flap, but these are thin so a neat fill possible.


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    #10
    antiskeptic
    Registered Users Posts: 9,555 ✭✭✭antiskeptic


    Muahahaha wrote: »
    colm_mcm wrote: »
    It’s certainly possible. There are companies who will supply a double glazed unit with the hole taken out of it for a cat flap,


    https://www.cornelscourtglass.ie/cat+flaps.html

    jesus that gave me a laugh, I would never have thought there would be a window company out there who literally specialises in retrofitting cat flaps into glass doors yet here we are, what a time to be alive :D

    On the topic would fitting a flap like this perhaps dramatically reduce the thermal loss performance of a double glazed glass door?

    Not of the glass panel itself, which remains a dg panel. But cat flaps aren't at all airtight.

    Block your room vent by the same amount as the gaps in the flap and your no worse off ☺


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    #11
    whosedaddy?
    Registered Users Posts: 922 ✭✭✭whosedaddy?


    Just looking around wrt to taking tg panel out and replacing with either upvc infill panel or dg panel with flap.. (450mm x 450mm)
    TG being 44mm thick, i haven't found upvc panel to replace and cut opening myself..
    i'm actually quite happy if there are glazing companies advertising this as service.. as my glazing supplier is NOT providing us with replacement panel with cut out hole.
    Hole in wall not an option here.


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    #12
    Rowley Birkin QC
    Registered Users Posts: 6,218 ✭✭✭Rowley Birkin QC


    Has anyone costed a replacement DG panel for a standard size patio (non-sliding) door?



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    #13
    Flinty997
    Registered Users Posts: 11,509 ✭✭✭✭Flinty997


    I got ball park figures and it was working out a lot of money like 500+ at the end of that day so I scratched that idea.



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