•Three and four chamber PVC-U profile represents the state-of-the-art in design and performance•Metal reinforcing is used in many, but not all windows for superior rigidity and strength•Full 70mm frame depth for extra rigidity and ‘fit’. Many systems are much narrower•3mm thick external walls on the profile - again for quality. ‘Thin wall’ systems could ‘flex’ or be more easily prone to damage
•M. Dobson Double Glazing window profiles are approved to BS EN12608:2003 and, in the correct specification, are approved to BS7950 standard for enhanced security. The window profile is extruded in a modern centre assessed to ISO 9001 (BS5750)
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