Installation Guide

Step 7
Continue with J-channel around the window. Cut the top ends of
the J-channel as shown in the detail to create a tab for tucking
under the header mount.
Step 8
With the J-channel fastened in place. Use the (2)
2" x 4" strips of butyl tape included to cover the
seems between the nailing flanges of the J-channel
and the header mount on either side of the opening.