General Glazing Guidelines
The guidelines for fitting of curved glass are similar to those of flat glass in many respects. For example ensuring there is enough tolerance for expansion, taking care that the glass does not come in contact with metal or indeed other glass, and in the case of window frames making sure that the glass is sitting on glazing blocks which are properly positioned.
The main point to note is that curved glass should never be pushed or forced into place, but rather fitted in a way that does not put the glass under undue stress. It should ‘sit there’ and be sealed with a sealant which is compatible for the glass being used
When glazing double glazed units, talk to your supplier and make sure that you use neutral cure silicone that does not have any organic plasticisers in it. Some of these silicones will attack the primary sealant on the unit causing it to break down over time. Butyl mastic strips are also very good for sealing and have the advantage of not being messy to work with. Where the glass is being fitted internally, the use of foam tape or neoprene gaskets work well.