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by xjr328
Sat Oct 17, 2009 7:16 pm
Forum: Glazing and Double Glazing Forum
Topic: Glazing distortion
Replies: 15
Views: 31178

In Reply: Rubbish..... firstly hot melt units are assembled on a press bench, using a hot butyl sealant the sealant increases the temperature of the air molecules inside the unit causing the psi inside the unit to increase, using the wrong desicant can cause fumes to become trapped in the unit as we...
by xjr328
Thu Aug 13, 2009 11:26 pm
Forum: Glazing and Double Glazing Forum
Topic: Glazing distortion
Replies: 15
Views: 31178

Pressure equalisation of sealed units is a achieved by drilling into the units either through the glass or through the spacer bar, the holes are then screened using a micro screen that allows air to enter the unit and filter out water droplets and dust etc, to understabd why a sealed unit distorts i...
by xjr328
Mon Feb 11, 2008 9:02 pm
Forum: Glazing and Double Glazing Forum
Topic: misting in double glazing cure??
Replies: 6
Views: 12079

leave it to the experts

your idea is spot on. don't listen to anyone who says units carn't be repaired. what they actually mean is they carn't repair them.

thousands of units have allready been repaired.
by xjr328
Mon Feb 11, 2008 8:56 pm
Forum: Glazing and Double Glazing Forum
Topic: PVC window panes cracking for no reason?
Replies: 2
Views: 4550

cracking windows

the answer is simple.

all sealed units react to temperature. In cold weather the units contract and can even implode. in hot weather the units expand and can even explode.
problem can now be solved fit a defogger valve.
by xjr328
Mon Feb 11, 2008 8:45 pm
Forum: Glazing and Double Glazing Forum
Topic: CONDENSATION ON MY NEW-ISH WINDOWS!
Replies: 5
Views: 6358

trickle vents

If the windows taken out had vents fitted, the replacement windows must have vents fitted to meet fensa regulations.
The condensation is caused by excessive moisture in the bedroom.
Try dehumidifier.
Fitting trickle vents will not get rid of the condensation.
by xjr328
Mon Feb 11, 2008 8:40 pm
Forum: Glazing and Double Glazing Forum
Topic: Glazing distortion
Replies: 15
Views: 31178

glass distortion

Glass distortion: Negative distortion is caused in double glazed units due to low temperatures. a sealed unit is not pressure equalised and is reacting to temperature changes. In cold weather the unit will have negative deflection and will distort any reflections, the same unit on a hot day will hav...
by xjr328
Mon Feb 11, 2008 8:08 pm
Forum: Glazing and Double Glazing Forum
Topic: Misting of double glazed units
Replies: 4
Views: 5214

sealed unit failure

Sealed units fail due to the fact that they are not pressure equalized, the life span of a sealed unit is 5 - 10 years.
New technology alows the units to be repaired and last 4 times longer than replacing.
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