"Keith" wrote in message
oups.com...
If you read the Certainteed website install instructions, you will see
that installation into a rough opening is one of the options....in fact
when I ordered the windows, they asked for the rough opening size....


But is the replacement window the same identical outside dimensions as the
original ?
(height, width, depth)

Manufacturers can/do goof, reading and order, and mistake a 6 for an 8 or a
0 on a piece of paper or a tape measure, and the wrong size is a result.

AMUN