9
Glazing
All glazing is supplied by specialist manufacturers, and is produced within agreed standards outlined by the Glass and Glazing
Federation (GGF). Glass impurities cannot be completely avoided, so minor occurrences are allowable within these standards.
The document ’Visual quality standards for installed insulation glass units constructed from flat transparrent glass’, states the
following:
• Both panes of sealed unit shall be viewed at right angles to the glass from the room standing at a distance of not less than
2 metres for toughened, laminated or coated glass, not less than a distance of 3 metres in natural daylight and not in direct
sunlight.
• Flat transparent glass, including laminated or toughened (tempered) glass shall be deemed acceptable if the following
phenomena are neither obstrusive nor bunched: totally enclosed seeds, bubbles or blisters: hairlines or blobs: fine scratches
not more than 25mm long;minute embedded particles
Impurities, dirt and scratches.
Larger scratches or marks within the glazed unit will be considered for replacement under the
12 Year Warranty - please contact VELFAC with details. Scratches or marks on the external face of the glazed units cannot
be covered by the warranty, as they are a result of handling after the transport packing has been removed. If the damage is a
result of installation, please contact your installer.
Shades.
Ordinary glass used in double-glazing is generally taken to be clear - but it is actually green. The colour reduces light
transmission. Therefore, two pieces of glass of the same type but with different thicknesses can be perceived as if they have
different shades of colour - this cannot be addressed.
Uneven heat across the glass surface can cause cracks due to thermal stress, which is not covered by warranty.
Therefore, we advise that you do not
:
• attach adhesive posters or signs to the window
• paint the window completely or partially
• attach adhesive plastic film or filters to the window
• create areas of partial shadow/shading
• blow hot air on the window (blow dryer, space heater, etc.)
