The windows were properly installed
and maintained. A design defect exists in
that water could easily bypass the seal and
accumulate in an area that did not drain
or dry out readily.
Researching recalls by the window
manufacturer may reveal a recall as was
the situation in this case where the manufacturer acknowledged the defect and gave
a prorated credit to the homeowner for the
failure during the warranty period.
Of course, water can enter a properly
designed window system as a result of im-proper installation, handling damage (
shipping) or other external damage (rocks from
lawn mowers) suggesting that an inspection
of the window system may be necessary.
3 Building Structural Movement
Structural movement of a building can
cause problems with window systems.
Deflection of the building structure can
occur from settling, nearby construction,
excessive loading, defective construction,
deterioration of the structure, foundation
movement and wind. Building deflection