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| Glazing Panel Visual Defect |  | ||
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| Posted by: DaveF1958 ® 03/10/2010, 02:35:27 Author Profile eMail author Edit |
I have a curtain wall glazing panel which has reflective blinds within the panel cavity and a large black spot has appeared on the face, about 600 to 800mm dia.
It is not dirt or glass staining and is visible from some directions only. It is not visible from close to the panel. At the worst it appears as an inky black area. I know it's not a lot of info but has anybody any ideas? DaveF
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| : Glazing Panel Visual Defect -- DaveF1958 | Post Reply | Top of thread | Engineering Forum |
| Posted by: Marky ® 03/10/2010, 08:27:33 Author Profile eMail author Edit |
Hi Dave....Welcome to the forum..ok I'll bite....What's Curtain Wall Glazing Panel? If it's a simple pane of glass it sounds like air has leaked in between layers...I have several windows in our building like that. |
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| Posted by: DaveF1958 ® 03/10/2010, 09:18:01 Author Profile eMail author Edit |
Marky Thanks for the contact. This unit is a sealed unit about 4m x 1.3m x 0.4m aluminium frame with a double glazed front, then an aluminium mirror finish blind, then an insulated back panel. It is part of the cladding wall to a steel structure building. Dave
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| Posted by: Marky ® 03/10/2010, 09:36:16 Author Profile eMail author Edit |
Dave....is it a single unit manufactured elsewhere and installed? Or built as part of the building? I guess a picture would be nice..but I think it's an air leak. |
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| Posted by: RWOLFEJR ® 03/10/2010, 09:53:53 Author Profile eMail author Edit |
Sounds like moisture or condensation in between a double pane window? Like was said... betting a leak occurred. Guessing you have enough moisture that the two panels are now connected via the moisture. Maybe the panel wasn't gapped right? Maybe a pane is warped? I really thing it's a case of the panes touching in that area either by real contact or connected by water drop. One drop would make a big spot if the panels are tight to each other and it would probably only show up at certain angles. |
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| Posted by: DaveF1958 ® 03/10/2010, 09:47:29 Author Profile eMail author Edit |
Marky Units are manufactured in China. Installed by the manufacturer, managed by me. See attached picture, this was taken in very overcast conditions. It was raining on was on the roof getting wet and a bit dissapointed with the view!! Dave
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| Posted by: Marky ® 03/10/2010, 10:19:16 Author Profile eMail author Edit |
It's a manufacturers issue...If it's an air/condensation issue try applying a hairdryer to the area and see if that helps eliminate or reduce the area. |
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| Posted by: DaveF1958 ® 03/11/2010, 01:04:53 Author Profile eMail author Edit |
Thanks for the input. Now organising a 40m boom lift so I can have a closer look at the front of the affected panels!!
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| Posted by: rwolfejr ® 03/11/2010, 09:43:08 Author Profile eMail author Edit |
I missed the part about the mirror blinds inside these panels...
Any chance there's something pushing the blinds against the outer pane? I see what you mean in your picture... Sure the customer isn't going to be too pleased with that. |
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| Posted by: DaveF1958 ® 03/14/2010, 06:13:06 Author Profile eMail author Edit |
Because this is a factory assembled unit the blind slats are held in a slotted side frame which fixes the slat angle at 70deg. Have been close up to the panels in position and the blind slats appear true and straight. They are about 70mm behind the inner face of the glass. It's a *** of a job and replacement is going to be extremely difficult. |
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