The selection of a suitable and practicable glazing method depends on a variety of factors such as the size of the glass, the exposure and the type of framing material and system.
Glazing and fixing techniques must comply with the recommendations of BS 8000: 1990 Workmanship on building sites Part 7: Code of practice for glazing, BS 6262: 1982 Code of practice for glazing for buildings, and amendments plus those of the frame and sealant manufacturers and any recommendations featured in the DSG GLASS GUIDE. It is not the intention of this section to provide method statements on the various techniques of glazing, but to offer a general guide and introduction to the methods of glazing currently available. Diagrams are provided for illustration purposes only.
Setting blocks, location blocks and, where necessary, distance pieces must be used to provide support and adequate clearance between the glass and the frame.
The number and spacing of the blocks relates to the size of glass pane, framing system and conditions of use.
They should be of a resilient, nondegradable and non-absorbent material and should be able to accommodate the thermal expansion of the frame and glass without imposing stress on the glass.