"Jasan" wrote in message
oups.com...
I woke up this AM to find that our large round top window in our family
room had cracked during the night. It was 20-30 below zero last night
in Minnesota. I was wondering if the cold weather can cause this. Our
house was built in 2002 so the window is still actually pretty new. If
the cold can do this how does one prevent it from happening?


is it an insulated (thermopane) window?
are there exterior mouldings? if there are, water could have settled in and
around the glass unit and the severe cold could have frozen the water so
quickly it broke the lite. this could have happened if there are no
exterior mouldings and there was a bad seal on the outside and allowed water
to collect.
if it is a thermopane, is it cracked on the inside or outside?
was there a snow build up on the window sill?


mike..............