Hole in double glazed patio door for cat flap.

I couldn't find anyone local when I wanted this doing, so I used this company:


http://www.montroseglass.co.uk/services/cat-flaps/


It was £250 for a full size French door glass unit replacement. It was all very efficient and straightforward.


The only issue is that the hole was cut quite high above the bottom edge of the glass, and as the glass is already about 20cm higher than the floor due to the door frame and the UPVC border around the door, the cat flap is a bit too high. We have therefore had to put a box under the flap so the cats can reach it! Not ideal, but it works. The glazier said that the hole couldn't be made any closer to the bottom edge of the glass to maintain the integrity of the unit. Something to bear in mind and check if getting this done.

greenface wrote: »

there is a minimum distance from the edge of the glass for a hole . Toughened is slightly more double or single glazed the same . I don't go less than 100mm (4inches) that's still about 3 inches above your glazing bead so about 7 inches from your cill. (normaly) inside and more outside. Anything that low has to be toughened but I have fitted fat claps in kitchen / utility windows slightly closer to the edge of the frame . Have your flap first incase it wont fit if its too low

Hi Greenface,

You seem to know what you're talking about, so a quick question.

We were interested in getting a cat flap fitted to a glass pannel (200cm x 39cm)...it occurred to us, however, that our little kitten is likely to grow into quite a large cat (due to the breed) - so we've been advised to get a "pet door" instead of a regular flap.

This is around 21cm in width, which would leave around 9cm of glass on either side - it sounds from your post above that this is likely to be a no-go?

Im getting a bit confused here if anyone can advise.

Currently looking at getting a new DG unit (well two actually) with a hole for catflap.
I have come across an issue where glazer says the panel size (380mmx1740mm) is too narrow for a 212mm hole.
The research ive done says that the glass adaptor kits need 212mm diameter min, even though the actual catflap interior dimensions are 160mm.

Is there any way round this or am i resigned to putting a hole in the wall?
PS, the panel measurements were taken up to the edge of visible glass so there may be another cm or two if measured properly.

Thanks in advance.

Just taken the beading off and had a proper measure (suprisingly easy!!) - the panel is actually 400x1770 - with just under another 10mm ish leeway between the existing panel and frame, with two of those blue spacers on each side.. so i may be able to twist someones arm to give it a go with a 210/212mm hole.

I have contacted two companies that have been mentioned on here (Im in the NW). with wildly varied costs.. although the dearer one might have been including measuring+fitting.