What are misted units?

The double glazed unit consists of 2 pieces of glass held apart around the edge by a spacer bar normally silver in colour. This bar is filled with a desiccant, tiny silica balls similar to those found in parcels to reduce the moisture levels. In the case of double glazed units, the silica soaks up any residual moisture held in the space within the unit when it is first made. Around the outside of this metal spacer bar, sealant is pumped to seal the unit and complete the process.

After a period of time the seal breaks down, causing a hairline fracture in the seal, thereby letting air containing moisture in. Various factors can accelerate this breakdown, such as wood frames and putty, poor frame drainage, poor installations not leaving sufficient gap between the glass edge and the frame, locations in extreme sunny positions or where excessive vibrations occur and poor unit manufacture.
Once air gets into the unit, the silica originally used becomes fully saturated and condensation starts to form as temperatures rise and fall against the side of the glass.

If your units were installed during the last 10 years you may still be covered with a guarantee.
There are now companies that offer to repair these units in-situ, however if the unit was incorrectly fitted in the first place it will remain incorrectly fitted and therefore break down again. The only solution is to replace the dougle glazed unit with a new one.

Windowfix (Leics) can replace units very quickly and efficiently with very little disruption to yourselves. At the same time we can check the window frame for poor drainage or any other damage that may of resulted from the break down of the sealed unit.
In some cases a same day replacement is possible and all units carry a five year Guarantee.
At present until April 2009 we are offering to beat any like for like quotation by 20 per cent to all households throughout Leicestershire

Price: POA       # upvc Window service 001