This document provides installation instructions for a universal standing seam panel roof curb in 6 steps: 1) Attach sub-frames to support the roof curb. 2) Mark and cut the roof panel to size. 3) Install backup channels under the roof panel. 4) Apply sealants and set the curb in place. 5) Fasten the curb to the roof panel. 6) Attach cap strips around the roof curb installation.

1. R O O F C U R B I N S TA L L AT I O N I N S T R U C T I O N S :
U N I V E R S A L S TA N D I N G S E A M PA N E L
p: (800) 284-1412 f: (903) 759-3598 www.lmcurbs.com 827 fisher rd longview, tx 75604

2. ROOF CURB
INSTALLATION INSTRUCTIONS
UNIVERSAL STANDING SEAM PANEL
Installation Check List:
_____Attach Sub-Frames Step 1
_____Layout Curb on Roof Panel Step 2
_____Back-up Channels Step 3
_____Apply Sealants & Set Curb in Place Step 4
_____Fasten Curb to Roof Panel Step 5
_____Attach Cap Strips Step 6
PARTS LIST
Flat Washer Polyurethane Sealant Caulk
Triple Bead Sealant Tape
Nut
14 Gauge Galvanized Steel Subframe
Bolt 5-1/2” tall
Length is equal to the purlin spacing minus
1-3/8”
Mounting Clip
Cap Strip
#14 - 1 1/8” Neoprene
Self-Tap Screw
Back-up Channels( eld notch)
BEGIN INSTALLATION
1 ATTACH SUB-FRAMES (framed opening is already installed)
Attach mounting clips to sub-frame and align the top of the sub-frame under Roof Purlin
Sub-frame
vertical box of roof curb and ush to the bottom side of roof sheets. Use the
mounting clip as a template, mark on purlin where 7/16” holes are to be drilled.
Once holes are drilled, attach mounting clips to purlins using at washers, nuts,
and bolts (see drawing 1.1). Finger tighten all hardware, then upset threads to
secure nuts. Attach sub-frames to mounting clips using at washers, nuts, and Drawing 1.2
bolts (see drawing 1.2). Flat washer
Nut
3/8” x 1” Bolts
Mounting clip
Drawing 1.1
Roof Purlin
*NOTICE* Sub-frame max. loading 500 lbs.
WARNING! Page 1
ALWAYS USE FALL PROTECTION WHILE
WORKING AROUND ROOF OPENINGS.

3. ROOF CURB
INSTALLATION INSTRUCTIONS
UNIVERSAL STANDING SEAM PANEL
2 LAYOUT CURB ON ROOF PANEL
Mark cut lines by setting roof curb(s) in place on roof panel (see
Cut Line
drawing 2.1) (DO NOT USE LEAD PENCIL). Upslope cut line will be 3” s 7”
inu
rbm
less than outer edge of curb base ange (see drawing 2.2). o f cu
g th
Len
Downslope cut line will be 4” less than outer edge of base ange (see
drawing 2.2). Remove exterior panel leaving the insulation face
showing (see drawing 2.3) and cleanup all metal shavings and debris.
Top View
Roof Panel Drawing 2.1
Roof Opening Layout throat opening on the insulation Throat Opening
and cut opening (see drawing 2.2).
Insulation
Cu
rb
Ba ge
se n
Fla Fla
Drawing 2.3 ng
e B ase
rb
Cu
*Notice* Sub-frames and purlins not shown in the above picture. Drawing 2.2
Edge of roof opening
3 BACK-UP CHANNELS
Notch back-up channels (see drawing). Slide back-up channels under roof
panel on top of sub-frames. Do not screw back-up channels to
subframes. They will be secured when curb is fastened down.
Cut leg of channel and fold under to form
notch for sub-frame (typically 4 places).
Back-up Channel
Back-up channels in place Drawing 3.1
Ce
nte
Ou rL
tsid ine
eD of
Su
CONVERT TRIPLELOK SEAM TO QUADLOK (if needed)
im b-F
en ram Convert a TripleLok panel seam to a QuadLok. Use duck billed crimpers to
sio
no e atten the panel seam. Steps 1 through 3 below illustrate how to properly
fB
ack
-up crimp the seam.
Ch
a nn
el
TRIPLELOK SEAM
QUADLOK SEAM Step 1 Step 2 Step 3
WARNING! Page 2
ALWAYS USE FALL PROTECTION WHILE
WORKING AROUND ROOF OPENINGS.

4. ROOF CURB
INSTALLATION INSTRUCTIONS
UNIVERSAL STANDING SEAM PANEL
4 APPLY SEALANTS & SET CURB IN PLACE The upslope highs are to be
Apply a strip of sealant tape and generous bead of caulk on the installed UNDER the roof panel.
upslope side of the roof curb and on downslope side of the roof
panel before setting roof curb in place (see drawing 4.1). Position
roof curb over roof opening and lower into place, shift curb to Roof Curb
align with sub-frames and roof panel.
Roof Panel
The downslope highs are to be
installed OVER the roof panel.
Caulk
(apply as shown)
Caulk Sealant Tape
(apply as shown)
Drawing 4.1
*Notice* Sub-frames and purlins not shown in the above picture.
Must ll end of standing
5 FASTEN CURB TO ROOF PANEL seam with caulk.
Fasten curb to roof panel using #14 - 1 1/8” neoprene self-tap screw Roof Panel
on 4” centers (see drawing 5.1). DO NOT FASTEN CURB OR ROOF
PANEL TO SUB-FRAMES. Please ensure all self-tap screws are
properly tightened before moving to the next step.
Self-Tap Screws
Drawing 5.1
*Notice* Sub-frames and purlins not shown in the above picture.
WARNING! Page 3
ALWAYS USE FALL PROTECTION WHILE
WORKING AROUND ROOF OPENINGS.

5. ROOF CURB
INSTALLATION INSTRUCTIONS
UNIVERSAL STANDING SEAM PANEL
6 ATTACH CAP STRIPS
Turn the cap strips upside down and apply sealant tape to the entrie length of both
inside legs. Then run a bead of caulk down the middle of the cap strips and Roof Panel
at each end of cap strip (see drawing 6.1). Install cap strips over the
curb/roof panel sidelap, fasten with screws alternating on 6”
centers (staggered on both sides). The capstrip should
extend approximately 6” past both upslope and
downslope base of roof curb.
Cap strips furnished with curb
Sealant tape Caulk Cap Strips
Screws staggered 6” on center (length varies)
(both sides)
Curb base Roof Panel Sealant tape
(both sides)
Caulk
Drawing 6.1 1” between each bead
of caulk at each end
*Notice* Sub-frames and purlins not shown in the above picture.
COMPLETED INSTALLATION
**Clean up installation debris before leaving area.
WARNING! Page 4
ALWAYS USE FALL PROTECTION WHILE
WORKING AROUND ROOF OPENINGS.