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Windows Cracking

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> Roger,

> If tinting film is installed on surface "4" of a dual pane window it usually voids any warranty because it causes an excessive build up of heat inside the glass unit.  The surfaces are numbered from the outside with that surface as #1, the
> inside of the outside glass pane is #2 etc.  Was there a tinting film?.  Usually the tinting installed within the glass by the manfacturer is not a problem.  I would talk to a glass and glazing contractor before I started exposing headers and
> framing.  Let us know what is going on when you figure it out.:

Bob Fennema
San Diego, CA

> --------------------------------------------------------------------------
> From: Roger Turk <73527.1356(--nospam--at)>
> Subject: RE: Glass Cracking
> To: seaint(--nospam--at)
> Jesse and Jeff,
> Jesse, I don't know if the glass is encapsulated (sealed) with gas between
> the two panes.  I think that it is just a double pane window with the panes
> separated by a gasket, at least that is what it looks like.
> Jeff, the perplexing (to me) part of the crack is the parabolic shape.  If
> there was racking, I would expect the crack to be diagonal, e.g., failed in
> diagonal tension, a la concrete shear cracking.  I also don't know if there
> is a laminate applied to either pane.  The upstairs window is about 3' wide
> and 4' high; the first floor window is about 4'wide and 5' high.
> There are workmanship problems regarding windows in the house.  The bottom
> sliding sash of a double hung window in a bedroom had fallen out of its frame
> and has been replaced but there is still an indication that the jamb is not
> plumb in that window --- a wider side gap at the top of the moveable sash
> than at the bottom.
> The homeowners, who are not the original owners, fortunately were able to
> obtain copies of the county's approved plans just before the plans were
> scheduled for destruction and are trying to get additional information on the
> construction of the house.  I have made only an initial inspection of the
> house and don't know how far the homeowners want me to go with the
> investigation, or even if they want me to continue with an investigation.  If
> I do continue, your comments will be considered.
> Thanks for your comments, an I welcome any other thoughts, comments, or
> suggestions from the knowledgeable people on this list.
> A. Roger Turk, P.E.(Structural)
> Tucson, Arizona

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