Installation Guide

QCI0274 REV. 1 Page 7 Certified 10/01/10
After the door is installed plumb
and square, measure the remain-
ing curb opening from the door to
the wall. (1)
Cut the bottom u-channel your
measured width minus 3/16”.
(example: if the remaining width is
36”, cut the u-channel to 35
13/16”.)
Once cut, set horizontal u-channel
in place to check proper fit. Then
measure from the top of the hori-
zontal u-channel to the top of the
door to get your vertical u-channel
length. (2)
Cut the vertical u-channel to that
measurement. (example: remaining
height is measured at 72”, cut the
vertical u-channel at 72”.)
1. Measure from door to wall and subtract 3/16” to get the horizontal u-channel length.
2. After horizontal u-channel has been installed,
measure from top of horizontal u-channel to top
of door to get vertical u-channel length.