Bay Window repair.

Mattyjw · 18 Sep 2016 at 14:53

My Mum double glazed bay window that appears to be made with three individual windows with something that looks like pvc pipe siliconed in between them, whilst the windows themselves are old they are intact however the pipe has perished probably down to uv exposure, is there something available which i couluse to fill the gap other than a new length of pipe?

https://goo.gl/photos/7CJKqzNj6sxSGkJz9

Hedge · 18 Sep 2016 at 15:29

Cement?

ron3003 · 19 Sep 2016 at 16:14

Looks from the pics to have been bodged originally with a plastic downpipe and some cement. You need proper aluminium reinforced bay corner posts with self tapping fixings through the frames into the post to hold everything together.
Like these
http://www.bostontradewindows.co.uk/shopping/pgm-more_information.php?id=48&=SID#MOREINFO

Mark A · 19 Sep 2016 at 20:55

If the bay is holding any weight it should really have the reinforced poles that Ron3003 linked above.

You could bodge it with some flat trim and silicone sealant to weatherproof it and make it look a bit better. If you can remove the old crap from inside the gaps between the frames you could foam that up with polyurethane foam.

Mattyjw · 20 Sep 2016 at 08:21

I think it was a bodge it and scarper install, the top bay started to crack and had to be retied in to the structural brickwork with steel ties .

Would the the two side units need to come out to fit the corner posts?

I was considering using low expansion foam in the gaps as I've read that it is used in some double glazing installs would that work?

Mark A · 20 Sep 2016 at 10:11

Its no wonder the brickwork above cracked :eek:

. There is a lot of weight being held up by just the frames without structural bay poles.

I think to do it properly you'd need to remove the whole thing as I doubt the pvc cill will be steel reinforced. You'd need to drill a hole in the cill on the corners to fit baypole jacks directly onto the brickwork underneath. These allow you to jack up the inner structural pole to support the weight above. Otherwise the pvc cill will just be crushed under the weight allowing the brickwork above to crack or worse.

If the brickwork above is all sorted now and you dont want to fit a new bay or completely remove the old one I wouldn't remove any glass or unscrew anything. Low expansion foam would be ideal to insulate the corners and then trim over with pvc trims.