Installation Instructions

PAGE 36
STEP 18: INSTALLING ROOF SHEET METAL PANELS
LENGTH OF ROOF PANELS: 12’ WIDE BUILDING 6’5” LONG, 20’ WIDE BUILDING 10’-7” LONG,
24’ WIDE BUILDING 12’-7” LONG, 30’ WIDE BUILDING 15’-9” LONG.
YOU WILL NEED AT LEAST TWO PEOPLE TO INSTALL ROOF SHEET METAL PANELS
One person will be on a tall step ladder, extension ladder, or scaffold inside the building at the building peak and the
other on the outside of the building at the eave. An additional person on the inside of the building on a step ladder close
to the side wall can be helpful in lifting the panels onto the roof.
The roof metal is sized to allow a 1 1/2” overhang at the eave.
Place the first sheet of roof sheet metal at the back edge of the roof flush with the outside of the building frame. Place the
Overlap edge
of the panel flush with the end of the building frame. NOTE: If the building is 40’ long, trim 4 1/2” off the
leading edge or starting edge of the panel. This is done to allow the corner trim to fit properly at the other end of
the building when the last panel is trimmed to fit.
The person at the lower end of the panel must line the panel edge up with the edge of the building and set the lower edge
of the panel to allow 1 1/2” of overhang on the side of the building. The person at the upper end of the panel should line
the edge of the panel with the edge of the building frame and attach the panel to the top roof purlin (hat channel) with a 1”
painted (roof color), self-drilling screw with rubber washer. The person at the lower end of the panel should then attach
the panel to the lower purlin making sure that the panel is flush with the building frame. At the eave end of the panel you
must install a screw on both sides of each major rib, At the top of the panel and all other intermediate install one screw on
one side of each major rib. Where the next panel overlaps the previous panel install screws on both sides of the overlap
rib.
We recommend that you install one screw next to the under lap rib of the panel at each roof purlin at this time. This will
make the roof more secure when you have to walk on it, and give you location points for installing the remaining screws
later when the purlins are not visible. (A third person will save time and energy with this step.)
Place the overlap edge of the next roof panel over the under lap edge of the previous panel. Line the panel up with the
first panel at the bottom or overhang edge. Attach that upper and lower ends to the purlins. Again, attach the under lap
edge at each purlin. IMPORTANT: Now, take a measurement from the under lap edge of the panel at the top and bottom
to the next frame section. The dimension at the top and bottom of the panel should be the same. If the measurements are
not the same you will have to straighten the next panel to get you sheet metal to come out flush with the building at the
other end. When you set the next panel in place fasten it to the purlin at the overlap joint at the top and bottom of the
panel. You can now stretch or compress the panel to get it parallel with the frame section. Check the distance from the
under lap rib to the next frame section at the top and bottom of the panel. If the dimension at the top is larger install a
screw next to the under lap rib at the top. If the dimension at the bottom is larger install the screw there and leave the
screw out at the top. . This should be 36”. Attach at the bottom, measure to the next frame section, set the top edge at
the same dimension and attach the top of the panel. Place one screw in remaining roof purlins at the edge of the panel.
Repeat this installation method down the length of the building.
When you install the panels on the other side of the roof, you will have to work the top side of the panels from one side or
from the roof on the other side.
When all roof panels have been installed you must get up onto the roof and use the straight edge or string method to in-
stall the remaining screws. When walking on the roof step on the flats only (not on major ribs) . Step on or very
near the purlins or frame members. The screws should be a guide to purlin and frame locations.
(See illustrations on next page)