13/01/2020
Summer and Winter Months
‘Cavity Failed Sealed Units’
Misted Double Glazed Failed Units are double or triple glazed sealed window units that have excess moisture trapped in the cavity between the panes of glass.
This is caused where there is a breach in the hermetic seal (airtight seal) around the edge of the sealed unit allowing moist air to enter the cavity of the unit over a period of days, weeks or months.
Temperature rises moist air is trapped
When the temperature rises the moist air trapped within the double glazed window unit condenses and over a period of time gives a white cloudy effect which to the eye is irritating and unsightly.
Over 90% of failed double glazing sealed units are south-east to south-west facing due to the fact that the sun rises in the east and sets in the west providing the greatest change in daily temperature which in turn creates the most movement in the window and door frame through expansion and contraction.
Failings in Double Glazed Windows
It is our opinion that if there were any weaknesses or faults in the original manufacturing process of the double glazed sealed unit, the continual expansion and contraction of the window or door frame will eventually cause the sealed unit to fail at the point of defect.
It is our professional opinion after decades of working within the double glazing industry that the only long term solution to this problem is to fully replace the failed unit with a new one. We can offer this repair service to any timber, UPVC, aluminium window frame of any age with a comforting 5 year warranty.