This document provides instructions for installing R-panel roof curbs. The instructions are as follows: 1. Attach sub-frames to the roof purlins using bolts, washers and nuts. 2. Layout the curb locations and mark the throat area cut lines on the roof panel. 3. Center the back-up channels with the roof openings and slide them underneath the roof panels. The instructions provide diagrams and details for properly installing and securing the roof curbs.

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 :
R - PA N E L S
p: (800) 284-1412 f: (903) 759-3598 w: www.lmcurbs.com address: 827 fisher rd longview, tx 75604

2. ROOF CURB
INSTALLATION INSTRUCTIONS
R-PANEL
Installation Check List:
_____Attach Sub-frame(s) Step 1
_____Layout Curb(s) on Roof Panel Step 2
_____Mount Back-up Channels Step 3
_____Apply Sealants & Set Curb in Place Step 4
_____Fasten Curb to Back-up Channels Step 5
PARTS LIST
Flat Washer Polyurethane Sealant Caulk
Nut
14 Gauge Galvinized Steel Subframe
5-1/2” tall
3/8” x 1” bolts Length is equal to the purlin spacing minus
1-3/8”
#14 - 1 1/8” Neoprene
Self-Tap Screw
Back-up Channel
Triple Bead Sealant Tape
BEGIN INSTALLATION
1 ATTACH SUB-FRAMES
Attach sub-frames to purlins (see drawing 1.1 and 1.2). Finger
tighten all hardware, then upset threads to secure nuts. Attach
sub-frames using the nuts, bolts, and washers.
Sub-frame
Washer
Nut
Bolt
Drawing 1.2
Roof Purlin
Drawing 1.1
*NOTICE* Sub-frame max. loading 500 lbs.
WARNING! Page 1
ALWAYS USE FALL PROTECTION WHILE
WORKING AROUND ROOF OPENINGS.

3. ROOF CURB
INSTALLATION INSTRUCTIONS
R-PANEL
Cut Line will be 2 1/2”
2 LAYOUT CURB ON ROOF PANEL less than outer edge of
Mark base ange locations and throat area cut lines by setting roof upslope/downslope
curb base ange.
curb in place on roof panel (DO NOT USE LEAD PENCIL).
Upslope/downslope cut lines will be 2 1/2” less than outer edge of
base ange.
Note #1: For uninsulated curb(s), throat opeing is actual I.D. of curb.
For insulated curb(s), use actual I.D. and add 1 3/4” to each side.
Drawing 2.1
Top View Roof Panel
Throat Opening
Remove Insulation leaving insulation facing (see note #1)
Roof Opening
in place. Cut insulation facing diago-
nally and tuck sections
under roof panels to
Insulation
trim roof openings. Cu
rb
Ba
se
Fla n ge
ng Fla
Drawing 2.2 e B ase
rb
Cu
Drawing 2.3
*Notice* Sub-frames and back-up channels not shown in the above picture.
Roof Panel
3 MOUNT BACK-UP CHANNELS
Center back-up channels with the center roof opening(s). Cut slots Back-up Channels (under
roof panels)
in back-up channels to slide over sub-frame(s) (see drawing 4.1).
Back-up channels are not be screwed to sub-frame or
purlin. Slide back-up channels underneath roof
panel (see drawing 4.2). Back-up channels are to be
ush with roof opening as showing in drawing 4.2.
Roof Purlin
6”
Fold cut tabs up 90 degrees DRAWING 4.2
11
/ 2” BA underneath the back-up
CK
-UP
OU CE CH
T SID
E
NT
ER NE
L
AN channels as shown.
DIM OF
EN SU
SIO B-F
NO RA
FB ME
AC
K-U
PC
HA
NN
ELL
1”
DRAWING 4.1
DRAWING 4.3
*NOTICE* DO NOT SCREW BACK-UP CHANNELS TO SUB-FRAMES!
WARNING! Page 2
ALWAYS USE FALL PROTECTION WHILE
WORKING AROUND ROOF OPENINGS.

4. ROOF CURB
INSTALLATION INSTRUCTIONS
R-PANEL
The upslode highs are to be installed
4 APPLY SEALANTS & SET CURB IN PLACE
UNDER the roof panel.
Apply a strip of sealant tape on the upslope side of the roof curb(s)
and on downslope side of the roof panel before setting roof
curb(s) in place (see drawing 4.1).
Roof Curb
Roof Panel
The downslope highs are to be installed
OVER the roof panel.
Caulk
(apply as shown)
Sealant Tape
Sealant tape on both
sides of roof opening.
Drawing 4.1
*NOTICE* Sub-frames and back-up channels not shown in the above picture(s).
5 FASTEN CURB TO BACK-UP CHANNELS
Fasten curb(s) to back-up channels and roof panel using self-tap Roof Panel
screws (see drawing 5.2). DO NOT FASTEN CURB, ROOF PANEL, OR
BACK-UP CHANNELS TO SUB-FRAMES.
Drawing 5.2
Self Tap Screws
Drawing 5.1
Back-up Channels (under
roof panels)
*NOTICE* Sub-frames and back-up channels not shown in the above picture(s).
WARNING! Page 3
ALWAYS USE FALL PROTECTION WHILE
WORKING AROUND ROOF OPENINGS.

5. ROOF CURB
INSTALLATION INSTRUCTIONS
R-PANEL
COMPLETED INSTALLATION
WARNING! Page 4
ALWAYS USE FALL PROTECTION WHILE
WORKING AROUND ROOF OPENINGS.