Double Glazing Condensation
One of the most common problems with double glazing is when condensation begins
to form between the two panes.
When the sealed units are manufactured the air gap usually contains dehydrated air,
or inert gases, and the spacer contains a silica gel which drys out moisture.
Over time, the seal can back down somewhere around the unit, moisture is let in,
and once the gel has absorbed as much moisture as it can - condensation begins to
form between the two panes of glass.
The only way to solve this is to replace the sealed unit.
Many suppliers of double glazing offer a long guarantee for the windows they installed,
so with any luck your replacements will be covered - otherwise it's a case of requesting