Posted by John Affleck on October 17, 2016 . 0 Comments
WHY SEALED UNITS FAIL?
The purpose of a double glazed sealed unit is to create a thermal barrier between the two panes of glass. A thermal barrier is created by trapping still dry air in the unit, as still dry air is a very poor conductor of heat.
The sealed unit is under pressure and expands and contracts daily when it is heated by the sun and then cools. One day a seal on the unit will open under pressure and reseal when the unit cools. The unit now acts as a pump pumping out dry air and breathing in cool damp air.
Eventually when the desiccants in the spacer bar are saturated you will see condensation in the unit.
We solve this problem by drilling two 4mm holes in the glass with our diamond coated drills (supplied) and then you apply our drying pellets through the bottom...