This article talks about common problems that can affect double glazing. It is not a complete guide but indicates where problems can arise. These ten problems are detailed below.
It is essential that when double glazed windows are fitted they have setting blocks beneath them. If they donít the windows will break down as moisture will find its way into the sealed unit. Even though there is silica between the two panes this will not cope with a large amount of water and condensation will appear between the panes.
Windows should have rebate platforms in their frames. Lack of these often leads to a build up of water in the housing. In a properly designed frame this requires no more than the addition of a slot or two. This allows proper ventilation.
Windows are often made with incorrect glass types. In some cases safety glazing recommendations are ignored. As well as choosing the right glass types, the glass must also be thick enough to resist wind loadings.
When installing double glazed units putty should not be used. Linseed oil putty can react chemically with the sealants causing them to disintegrate.
When fitting a casement window the fitter should check the alignment of the casement using a process known as toeing and heeling. this ensures that the window is square to the walls and ensures a perfect fit.
One key thing to check when fitting a window is to ensure that timber frames that have been acting as a support for the wall above are not removed when installing a new window. This can have disastrous consequences resulting in structural failure.
All windows and doors should be installed with an inset of a minimum of 10 mm into the opening.
The absence or failure of lintels account for many double glazing problems. Even worse they are often not detected until a few weeks after the installation.
It is essential that windows are manufactured with enough reinforcement to resist wind-loading. This stops the frames from deflecting.
And finally windows should be fixed in using the right kind of fixing. Masonry bolts should be used and these should have a corrosion resistant coating to ensure longevity.
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