Installation & Assembly

2x4 Truss
OSB Sheathing
Straight Edge
22" x 48"
48" x 72"
1. Install (2) two 46" x 72" OSB sheathing panels across the front of the roof. Butt 46" edge
against back of gable siding. The 72" edge should be flush with the end of the 2x4 truss, see
detail below. Make sure the trusses are plumb and the roof sheathing meets the center of the
3rd truss. Use 7d sinkers spaced 12" apart. The roof sheathing will be about 1" below the ridge
to allow for ventilation if a ridge vent is installed.
Step 9 Install Roof Sheathing
46" x 72" Sheathing
3. Starting in lower left rear corner install (2) one 48" x 72" OSB sheathing across roof. Butt the
48" edge against back of gable siding and position the bottom edge 2-1/2" past back wall siding.
4. Install (3) three 22" x 48" wide roof sheathing across the top of the building. Siding will be
about 1" below ridge.
1X3 Trim
5. Install 60" long 1x3 trim boards on
the back wall, flush with the siding
on the end wall. Use 8d galv. nails
spaced 12" apart.
1" Below Ridge