Note to all of my firends.

R-values have no place in the window industry, because the resistance
value of the glass pack and the frame are always compromised by the air
infiltration around the opening and the amount of passive energy from
short wave radiation (light).

The window industry therefore uses U values. Though they are basically
1/R-Value, U values can fluctuate where R-values are relatively static.

Any moisture inside the glass pack indicates seal failure. It is up to
the window manufacturer to honor his warranty.

Odds are, that the warranty does NOT include installation or removal of
the old window. Odds also are, that the manufacturer will ignore you.

You might be best to request replacement sahes (the parts that hold the
glass. If your windows tilt in and out, you will be able to replace
these yourself very easily.