Our conventional / built-up roof curbs feature full penetration continuous welds at all seams. We fabricate the curbs with a 3″ perimeter flat flange around the base of the curb, in addition to a 1.5″ x 1.5″ treated wood nailer to accept roofing material. Curb walls are finished with 1″ rigid insulation and may be fitted with an interior white liner. Additionally, higher R-Value insulation is available. We provide scaled CAD drawings with all orders.
|18 GA, 14 GA or 16 GA aluminized steel
1″ Rigid Insulation R7.2 (higher R-Values available)
|Full penetration welds, thoroughly tested
Mitered corners for true square top
|Curb Base Flange
|3″ perimeter base flange
Custom base flange available
|Level top when specified
Skylight curbs slope with roof
1.5″x1.5″ treated wood nailer
|12″ height typical
1.5″ top flange
3″ perimeter base flange
|Galvanized steel mill finish
|Engineering calcs (additional costs apply)
|Conceals insulation, mill or white finish, complete kit for install
|Installs on ridge condition, double pitched
|Cost savings when insulation not required
|2″ thick insulation for R14 value
|Damper support for exhaust fan
|Insulated blank-offs, duct supports for HVAC equipment
|L x W x H
|Options (add all that apply)
Conventional Built-up or Membrane Roof
|R: Flat Flange
S: Slope w/ Roof
X: Not Insulated
C: Stainless Steel
|CL: Curb Liner
RM: Ridge Mount
CT: Collar Top
Flat Side Flanges (R): flat side flanges 3″ typical
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.
Conventional roof curbs are raised metal platforms that offer support and weatherproofing, distributing the weight of rooftop equipment like HVAC units, exhaust fans, and skylights, and preventing damage to the roof membrane.
Types of conventional roof curbs also called built-up roof curbs include Non-Ventilated Curbs for general equipment support, Ventilated Curbs with airflow vents, Curbs with Curbsticks for added stability, and Custom Curbs designed for specific needs and equipment dimensions.
Built-up roof curbs are most commonly made of galvanized steel for durability and weather resistance, but can also be made from aluminum or stainless steel for specific applications.
The main benefits include enhanced weatherproofing, structural support for rooftop equipment, and simplified equipment installation. Conventional roof curbs provide a ready platform for mounting, streamlining the installation process and saving time and construction costs.
Custom roof curbs offer a perfect fit for unique equipment and complex roof configurations, ensuring optimal performance and aesthetics.
Roof curbs are used extensively on commercial roofs to ensure the safe installation and proper functioning of various components of the roof system, such as HVAC equipment, and more… Learn More
Commercial buildings often have at least one or a combination of these items on the roof: fans, condensers, skylights, hatches, vents, or AC units… Learn More
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?