Shattered Window - How did THAT happen?


Old 03-30-09, 01:06 PM
Thread Starter
Join Date: Nov 2005
Location: USA
Posts: 8
Upvotes: 0
Received 0 Votes on 0 Posts
Shattered Window - How did THAT happen?

Last evening I heard a loud crash but couldn't identify the source.

Today I discovered that one INSIDE pane of a double insulated
Andersen window in an UNOCCUPIED room had completley shattered - glass everywhere! There's even a screen on the outside of the window which remains unmarked.

The window has been installed for 20 years, there was nothing abnormal going on weatherwise.

I am mystified as to what could possible have caused that.

Has anyone got any ideas?

Clearly, I have a replacement job in front of me but this was definitely "a first"
Sponsored Links
Old 03-30-09, 03:31 PM
Join Date: Oct 2006
Location: Wilmington
Posts: 4,219
Upvotes: 0
Received 0 Votes on 0 Posts
Not a normal thing, but it does happen for no apparent reason. Andersen does warrant the glass for 20 yrs so contact them. Even if they are out of warranty, the glass is not replaceable and you have to replace the sash. There is a triangle with the Andersen logo and some numbers/letters etched in the corner of each sash glass. They will need that info.
Old 03-31-09, 01:54 PM
Join Date: Mar 2009
Location: WA
Posts: 1,167
Upvotes: 0
Received 0 Votes on 0 Posts
I know when installing new windows, you are required by manufacturer to leave a 1/4" gap at the top for future settling of the framing/shrinkage over the window. If you don't, over time, the settling/movement of the wood components will bear on the window frame and put considerable force there. I heard of one case where a child tapped the window and it broke. Thankfully, no one was hurt. Be safe, GBR
Old 03-31-09, 05:51 PM
Join Date: Oct 2004
Location: East of the Mississippi
Posts: 177
Upvotes: 0
Received 0 Votes on 0 Posts
collapsed glass


Has it been cold where you live?

Did you happen to notice any condensation patterns in the center of any of your windows this past winter?

Does the glass in your window look flat or does it look a bit concave?
Old 04-01-09, 07:04 PM
Temporarily Suspended
Join Date: Jul 2008
Location: NY
Posts: 10,986
Upvotes: 0
Received 0 Votes on 0 Posts
I would say the pressure built in between the panes due to an air leak, cold air from the outside & warm from the inside, almost like thunder.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes
Ask a Question
Question Title:
Your question will be posted in: