What is the correct way to fit CURVED single panes of glass onto a steel frame to prevent cracking as shown in picture. Existing appears to of been installed using an exterior adhesive / sealant. I assume cracking occurred as a result of stress caused by curing of the sealant and differential thermal expansion of glass and steel. Is it correct to use something like CT1 or does this situation always require rubber gaskets etc.
Cracked curved glass on steel frame
- Thread starter DSJC
- Start date
-
- Tags
- conservatory glazing
- Joined
- 14 Nov 2014
- Messages
- 1,564
- Reaction score
- 397
- Country
What are the others put in with? Whatever material it is being fitted to will have a different rate of movement to the glass. I would say a flexible seal would be better , but take greenhouses , they are held in by metal clips. Your biggest trouble is probably going to be getting the correct pane to replace that , curved glass can be quite complex to get the exact curve ( and also quite expensive! )
Sorry should of mentioned in question - We already have the new glass [in total 12 panes are to be replaced] - and yes it was complex and expensive! So I want to understand the how the professionals would do it, so that I make sure they are fitted correctly.
Might be an idea to engage with two or three manufacturers of modern takes on glazing putty to ascertain if they'd recommend their product as being suitable for your application? I just picked this site at random to give an idea as to what I mean. I wouldn't however just take the word of one supplier as they might simply be keen to promote their product to you regardless!
Endurance WHITE Glazing Putty Replacement 310ml | Sealco Scotland (sealco-scotland.co.uk)
Interesting that the cracked pane is directly above the door. Coincidence or possibly subject to slightly more adverse forces when door is opened and/or closed?
Endurance WHITE Glazing Putty Replacement 310ml | Sealco Scotland (sealco-scotland.co.uk)
Interesting that the cracked pane is directly above the door. Coincidence or possibly subject to slightly more adverse forces when door is opened and/or closed?
It would work similarly to a car windscreen, attached to a metal frame and subject to all sorts of torsions, vibrations and small impacts.
However windscreens are not just glass, that's why they withstand such abuse.
Your problem will be the thermal stress as you know.
Speak to the glass manufacturer and see what they suggest.
Surely there will need to be expansion gaps and specialist adhesive/sealant.
I remember a guy from autoglass fitting a windscreen with a Sika sealant.
However windscreens are not just glass, that's why they withstand such abuse.
Your problem will be the thermal stress as you know.
Speak to the glass manufacturer and see what they suggest.
Surely there will need to be expansion gaps and specialist adhesive/sealant.
I remember a guy from autoglass fitting a windscreen with a Sika sealant.