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Manufacturer and supplier of roof products and accessories for the metal building industry since 1964
R-Panel Roof Curb
R-Panel Roof Curb (High Rib Roof Curb) fits any R-Panel metal roof system. Curb dimensions and configuration are built to meet any skylight or rooftop equipment requirements. Pitch correction to match roof slope as specified. Rib-to-rib (R&S Layover) side flanges come standard for a complete weather tight seal. Economical flat flange models are also available. Roof curb may include a custom finish that matches the roof color. Roof Curbs install under the roof panel on the up-slope and over the roof panel on the down-slope, which results in a shingled watershed condition for complete weather-tight condition. In addition, a 20-Year Warranty comes standard on all aluminum curbs.
Roof Curbs For: HVAC | Exhaust Fans | Skylights | Gravity Vents | Pipe Penetrations
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Aluminum Roof Curb with Layover Side Flanges and Damper Shelf
Features
- Custom-fabricated to match any metal roof profile
- Integral upslope cricket for water diversion
- Aluminum (preferred) or aluminized steel construction
- Full-penetration/continuous welds
- Mill or custom color finish
- Partitioned top for HVAC as specified
- Backer-channel, sealants and fasteners for install
- CAD drawings supplied with every order
- Structural calculations available upon request (fee)
- Aluminum curbs carry a 20-Year Warranty
- Description
- Model Guide
- Sizes and Weights
- Documents
- Certification
Specifications
| Material | 0.80 aluminum 18 GA, 14 GA or 16 GA Aluminized steel 1″ Rigid Insulation R6.5 (higher R-Values available) |
| Construction | Full penetration welds, thoroughly tested Mitered corners for true square top |
| Curb Up-slope | Flange installs under panel Panel closures welded or shipped loose Integrated 4″ high water cricket Min 9″ between up-slope curb wall and closures |
| Curb Down-slope | Flange installs over panel Caps (straps) welded or shipped loose Minimum 3″ down-slope flange |
| Curb Side Flanges | Rib-to-Rib, layover to next natural high rib Minimum 3″ between curb sidewall and high ribs |
| Curb Top | Level top when specified Skylight curbs slope with roof |
| Dimensions | 6″ – 8″ curb height on up-slope (custom heights available) |
| Finish | Aluminum mill finish Powder coat (standard colors) Kynar (exact match) |
| Accessories | 14 GA backer-channel Sealants, fasteners |
| Certifications | Engineering calcs (additional costs apply) |
| Warranty | 20 Years (aluminum) 1 Year (steel) |
TYPE IF CURB (Internally Flanged)
Same design / construction as above with the following exceptions:
| Curb Up-slope | Up-slope base flange breaks inward 1-1/2″ Includes 2-peice water diverter assembly and backer channel |
| Curb Down-slope | Down-slope base flange breaks inward 1-1/2″ Integrated caps in curb wall accept panel highs |
| Curb Side Flanges | Side base flanges break inward 1-1/2″ |
| Backer Channel | Integral backer channel Included with all IF curb kits |
Options
| Curb Liner | Conceals insulation, mill or white finish, complete kit for install |
| Ridge Mount | Installs on ridge condition, double pitched |
| Collar Top | Square-to-round transition |
| Over / Over | Up-slope and Down-slope over roof panel |
| Non-Insulated | Cost savings when insulation not required |
| High R-Value | 2″ thick insulation for R14 value |
| Damper Shelf | Damper support for exhaust fan |
| Duct Supports | Blank-offs, duct supports for HVAC equipment |
Curb Model Guide
Provide roof panel make, model, seam spacing and pitch when requesting quote
| Model | L x W x H |
Side Flanges | Closures/ Caps |
Upslope/ Downslope |
Curb Top | Insulation | Material | Finish | Options (add all that apply) |
| MBR
R-Panel / High Rib |
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1: Fixed / Welded
2: Loose / Field Located 3. None 4. Up-slope Flat, Down-slope Offset |
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Example
MBR-48x96x8-L1SY-18AM-CL: Metal building roof curb with outer dimension of 48″x96″ and 8″ high at the upslope curb wall. Features layover type side flanges with fixed / welded closures and caps and a non-pitched-corrected top flange. Fabricated of aluminum, mill finish and a curb liner (double wall).
Terminology
Closure: seals trapezoidal panel at up-slope curb opening (under panel)
Cap: seals trapezoidal panel at down-slope curb opening (over panel)
Seam Clip Side Flanges (C): side flanges integrate with roof panel seams (includes seam clip)
Layover Side Flanges (L): side flanges extend and layover next natural high rib
Flat Side Flanges (R): flat side flanges 3″ typical
Internally Flanged (F): perimeter base flange breaks / seals inside curb wall
Under / Over: up-slope installs under, down-slope installs over roof panel
Over / Over (OO): up-slope and down-slope flanges install over roof panel
Floating 2-Curb System (FC): Inner weight-bearing curb and outer flashing curb (heavy equipment)
Ridge Mount (RM): Inner weight-bearing curb and outer flashing curb (heavy equipment)
Curb Liner (CL): white or mill finish liner on inside of curb wall; conceals insulationFloating
Collar-Top (CT): square-to-round transition for pipe penetrations
All curbs custom-sized to meet project specifications. CAD drawings are provided with each curb order (submittal package) including HVAC partitions, damper shelves and panel rib/seam contour placements.
Documents
Additional curb configurations available, call for details
| Product Description | Model | Submittal | Specifications | Installation | Warranty |
| Layover Side Flanges | MBR-L | WORD | |||
| Flat Side Flanges | MBR-R | WORD | |||
| Internally Flanged | MBR-F | WORD | |||
| Ridge Mount | MBR-R-RM | WORD | |||
| Collar Top Adapter Square-to-Round Transition |
MBR-CT | WORD | |||
| Accessories | Model | Submittal | Specifications | Installation | Warranty |
| Backer Channel Layover Side Flanges |
SUB-MBR-L | ||||
| Backer Channel Flat Side Flanges |
SUB-MBR-R | ||||
| Backer Channel Internally Flanged Curbs |
SUB-MBR-F |
Optional engineering calcs by Structural P.E. to ensure local codes and load tolerances are met.
Check out our Product Line Card
R&S manufactures a vast array of products to fit your project needs. We aim to supply all of your metal building roof accessory needs, not just one product. Why go to multiple vendors when R&S can supply it all?
