Edge clearance must always be allowed and cushioning, e.g setting blocks, gaskets, etc., installed to prevent contact with hard material. Glass to hard material contact should be eliminated at all times by the use of gaskets, bushes, neoprene linings and neoprene or hardwood setting blocks. All fittings must be free from high spots and/or burrs.

Glazing should generally be carried out in accordance with the requirements of BS 6262 and BS 8000: Part 7.