Installation: Method 1
1. The Rib Profiles should be
positioned parallel to the laps of the
installed roofing membrane. Once
the rib spacing has been determined, chalk lines on the membrane
to indicate each rib location and
to serve as a guide to keep them
straight. Note: Test chalk to ensure
that snapped lines or the color used does not permanently stain the
membrane and can be washed off before using on the roof membrane
(red chalk will permanently stain the membrane).
2. Position the edge of the rib flange on the chalk line. Using a
hinge type motion, keep the flange edge on the chalk line and roll the
rib so a hand welder can be inserted. Tack-weld only the centermost
portion of the rib every 6” being careful not to weld the flange to the
membrane. The initial heat setting on the hand gun should be at #8.
(Do not use excessive heat for this step to avoid compromising the
watertight integrity of the membrane).
3. Connecting multiple ribs is
achieved by using the supplied
connector pins. Insert a pin half
way into the end of one profile.
Connect the adjoining rib by
inserting the exposed end of the
pin into the alignment hole.
4. Once the entire run of rib
profiles has been tack welded
at least every 6” on center, position the automatic walk welder so it
straddles the rib. Set the welding temperature to 1004°F (540°C) and
the speed to 12. 5 feet ( 3. 8 meters) per minute as a starting point.
Welders may vary slightly, so trial welds should be completed prior to
welding the ribs to the membrane.
5. Manually engage the drive
system of the welder using the
control buttons located on top of
the machine as soon as the nozzle
is inserted under the rib flange. As
heat is applied to the underside
of the rib flange, pressure must
be applied to the topside of the
flange using a 2-inch silicone
roller. Once the complete run of the flange is welded to the membrane, the welder must be turned 180 degrees and positioned to weld
the opposite flange.
6. An alternative method to weld the rib profile in place is to entirely
weld each rib to the membrane using a hand-held heat gun.
Installation: Method 2
1. Once the rib spacing has been determined, the first run of Rib
Profile is welded to the membrane using a pan as a straight edge.
The pan is typically fabricated from TPO Coated Metal or 24-gauge
sheet metal and serves as a straight edge and spacer during the rib
welding process. The width of the pan may be calculated by subtract-
ing the width of the
welder body from the
distance required be-
tween ribs. Multiple
pans will be required
when using this
2. Welding the first
set of ribs will first
of a chalk line to provide a reference point for the edge of the metal
pan. Note: Test chalk to confirm it can be removed from the surface
of the membrane after the welding process is complete (red chalk will
permanently stain the surface of the membrane).
3. Position ribs in proximity to where they will be welded. Connect
multiple individual ribs using the supplied connector pins. Insert a
pin halfway into the alignment hole located at the end of one profile.
Connect the adjoining rib by inserting the exposed end of the pin into
the alignment hole. If the connector pins are properly inserted, a tight
connection will be achieved between the ribs, and welder movement
over the connection area should not be affected.
4. With the first row of ribs
properly positioned parallel
to the field seams, align one
edge of the metal pan along
the chalk line. Holding the pan
in place, position the side of
the welder body against the
opposite edge of the pan so it
may serve as a guide.
5. Set the welding temperature to 1004°F (540°C) and the speed to
12. 5 feet ( 3. 8 meters) per minute as a starting point. Welders may vary
slightly, so trial welds should be completed prior to welding the ribs to
6. Engage the nozzle so it is centered under the rib and manually
start the welder using the controls located on top of the machine.
Continue welding the rib, making sure the nozzle remains centered.
Note: The nozzle is not locked-in at this position and may stray if left
7. As the entire run of rib is welded, a second pan is required for a
continuous welding process. An additional field mechanic is required
to move the pans as the welding process continues.
8. Once the first run of ribs is welded in place, push one edge of
the pan against the welded ribs.
9. Position the welder against the edge of the pan, and use it to
keep the rib to be welded parallel to the previously welded rib.
10. Continue with this process as the ribs are welded over the
remainder of the roof area.
Helpful Tip: To reduce separation of connected Rib pieces during the
Method 2 welding process, use a hand welder to heat the end of one of the
Ribs after inserting the connector pin. Then, push the two ends together to
create a tack weld that will hold the pieces together.