BECAUSE OF THE NATURE OF THE GLASS PRODUCTION PROCESS, PERFECT OPTICAL QUALITY AND SURFACES FREE OF ANY MARKS CANNOT BE GUARANTEED.
THE FOLLOWING EXTRACTS ARE BASED UPON RECOGNISED EUROPEAN AND INDUSTRY STANDARDS AND IS SUPPORTED BY THE GLASS & GLAZING FEDERATION DOCUMENT.
The viewing standard will be as follows:
Toughened, laminated, low e glasses or other coated glasses will be viewed at 3 metres.
The viewing will be at 90 degrees, in natural daylight, imperfections may not be marked to highlight their presence and will only be visible to the naked eye.
A band 50mm wide around the perimeter of the double glazing unit is excluded as an area to be viewed.
The double glazing unit will be looked through, not at the surfaces.
This must be carried out as early as possible after installation.
What to expect when viewed as described:
The sealed unit is acceptable if the following are neither obtrusive nor bunched.
Bubbles, blisters, hairlines, blobs, minute particles, totally enclosed seeds or fine scratches no more than 25mm long.
Due to the manufacturing process, seeds and bubbles are deemed acceptable in patterned glass.
SOME BLEMISHES ARE TO BE EXPECTED.