Cracked window


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Old 01-07-17, 02:21 PM
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Cracked window

Hello-

Noticed today that a window in my bedroom is cracked. Not sure when it happened as the shade over this window is rarely opened. The window is a renewal by anderson double paned window. The crack is on the outside window. There is a screen on the window. Just curious on how the window could have cracked. Did a little research and seems that sometimes there may be a defect in the glass, but that would usually surface in the first year. It has been cold recently. Could that be it? Seems weird. Any ideas?

http://i1128.photobucket.com/albums/..._162241957.jpg
 
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Old 01-07-17, 02:35 PM
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It could be a "time" thing and undue pressure on the frame could crack them. Is it a single or double sash? If single is it on the movable sash? How old is the window?
 
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Old 01-07-17, 02:41 PM
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Don't know much about windows but I'm pretty sure double. Both top and bottom move. The bottom slides up to open, but you can lower the top to clean it, if that is what makes it a double. It is the bottom window. I believe the windows are 10 to 15 years old.
 
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Old 01-07-17, 02:48 PM
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Since the sash is removable, you can have a new IGU (Insulated Glazing Unit) installed in the frame. Any good glazier can do it at a reasonable cost. In addition the damage appears to have been caused by an impact near the middle of the glass, which wouldn't preclude a bird strike, that can flex the screen enough to touch the glass but not damage the screen.
 
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Old 01-07-17, 02:52 PM
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Never thought about a bird doing that. Good thought. Maybe the cold has "helped" it grow. Thanks for the insight Chandler!
 
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Old 01-07-17, 06:59 PM
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You should be able to use their website to get the service you need, if you want to maintain your warranty with them. Otherwise any glass company can replace it once they come measure the size and get one made.
 
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Old 01-08-17, 09:41 AM
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Temperatures do get pretty cold where you are. The crack could have started from a defect at the edge of the glass when it was installed and then spread when the cold added stress.
 
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Old 01-08-17, 11:08 AM
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Most commonly if cracks occur in winter its ice around the outside edge of the glass that causes stress cracks but if you have clear evidence of a bird strike... that would explain it. Chips on the glass edge (from factory) can show up as a crack much later too. Occasionally a window will crack from stress in the winter from frame shrinkage.
 
 

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