I am not sure the previous answer is correct. You can have the sealed unit repaired / remade where they replace the seal and refil the void between the panes with inert gas. I just had one done last week.
Rhodri
August 2008
sadly you cant repair double glazed units,you will have to buy new units and replace them,you will need thickness of glass and size from where window and bead meets both height and width then take 10mm off size.hope this helps
shaun www.sdwupvcrepair.co.uk
July 2008
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