Metal Window Frame Rusting
Whenever you see metal rusting anywhere, it's usually not
going to be good news. Remember that metal rusts where moisture
accumulates for long periods of time.
If you noticed the basement window has a metal frame around it. The
damage looks like it's at the top and bottom of the window frame, but
the sides don't look as bad.
I wouldn't doubt that water sits on the top of the damaged window frame
for long periods of time during the winter. If this window is located in
an area where it snows, there's a good chance that the snow will
accumulate around the base of the house and this snow should be removed
regularly.
Most homeowners don't realize that snow creates more than just heating
problems. Snow often accumulates on roofs and if this snow isn't
removed, could form ice dams and ice dams lead to water damage.
If you see metal rusting, especially in a situation like this, you
should find out what's causing the problem first, if possible. I don't
suggest that you wait eight months until it snows before you make the
repair, but it wouldn't be a bad idea to monitor the home repair, until
you find out what's causing the damage.
Home Repair Tip: If you noticed the window is new and the metal frame is
old. Obviously someone replaced the old window without making the
necessary for home repairs. The metal frame should either be replaced or
repaired and then repainted.
I don't know how long the homeowners expect the new window to last, but
I doubt that the metal window frame will last the duration, if it's not
repaired and maintained on a regular basis.