Roof Curbs / Equipment Rails

We represent a complete line of HVAC roof curbs and equipment rails including;

Prefabricated roof curbs, metal building roof curbs, rooftop curbs, metal curbs, sloped curbs, roof curb adapters and equipment support rails.

Whether it's a basic 12" tall flat roofcurb for an exhaust fan or a highly custom roof curb adapter with a double pitch, we can meet all of your specifications.

A roof curb is designed to simplify the installation of roof mounted equipment and provide durable life long equipment support and weather tight service. The two basic designs offered are "roofed-over flashing" and "self-flashing". Both styles are available in a wide variety of sizes and configurations with options to provide a product to suit every application.

Roof curb with cant for roofed over flashing.	Self flashing roofcurb.	Equipment support rails.

To obtain pricing on HVAC roof curbs and HVAC equipment rails:

Step 1) Choose the roofcurb or support rail section below that best meets your requirements and download the appropriate templates. If it's easier, take a digital picture or draw a sketch detailing your requirements. Provide as much information you can. The more information you provide, the closer we can match your application. We do not need every last detail to generate an estimate. Roof curb and equipment support rail pricing is primarily dictated by the total weight of the steel required and the freight. We will confirm the important fit-up dimensions before entering your roofcurb into production.

Step 2) Fax or e-mail us your completed template, digital pictures or sketches:
             Fax: 978-222-8448    E-mail: sales@h-mac.com

Step 3) We will provide a quotation within 24 hours. Most roof curbs and support rails are built in 3-5 business days. Custom adapter curbs may take up to 2 weeks. Plan 3-4 days for standard ground freight. Expedited freight methods are available.

Step 4) If you decide to order the roofcurb or equipment rails, we will provide you with a detailed submittal package for your review and approval.

Do you need a highly custom curb and you're not comfortable taking your own dimensions? We have solutions!

1) If you are in the New England area, we would be happy to visit your site.
2) If you are outside the New England area, fax or e-mail us your equipment submittals and roofing specifications. We can generate detailed as-built drawings for your approval.

Do you need a roofcurb fast?

Our manufacturers can build almost any standard roof curb in 3-5 business days. Add 3-4 days for standard ground shipping, or we can quote you on overnight expedited freight.

Standard Roofcurb Features:

• Built with continuous welded seems with integral base plate for watertight construction and extra strength.
• Constructed of 18 ga. galvanized steel.
• Furnished with 1-1/2" fiberglass sound attenuating thermal insulation.
• Minimum curb height is 8"

Common roof curb options:

• Metal building roofcurbs
• Seismic roof curbs
• Sloped curbs
• Acoustical sound attenuating curbs
• Restaurant exhaust curbs
• Roof curb adapters
• Damper shelves
• .063" aluminum or 18 ga. GalvalumeTM
• Heavy gage construction
• Heights of 12, 14, 16, 18, 20, 24" or special heights
• Raised cant up to 4"
• Special flange widths
• Galvanized steel or aluminum liner
• Vent slots, 4" by 1/2"
• Burglar Security bars of 1/2" or 3/4" steel
• Decorative coating in a variety of colors
• Protective coating of Epoxy, Eisenheiss or Heresite
• Water diverter
• Wood nailer in lieu of polystyrene gasket on self flashing type curbs
• Treated wood nailer
• Back draft damper, exhaust or supply type, with or without motor operator
• Please contact us for options not shown above

Standard Roof Curbs - Download templates

Standard roofcurbs include roof over flashing and self flashing curbs. There are several variations of both styles. Choose the link that best meets your application and download the detailed specification sheets.
Roof Over Flashing Roof Curbs download pdf
Self Flashing Roof Curbs download pdf

Pitched Roof Curbs - Download templates

Single pitched curbs and double pitched roofcurbs are used on sloped roofs. Self flashing curbs are typically best suited for sloped roof applications.
Pitched Roofcurbs download pdf

Metal Building Roof Curbs - Download templates

Metal roof curbs are constructed of 18 ga. galvanized steel. 18 ga. GalvalumeTM or .063" aluminum are available for an additional charge. Standard 8" height may be modified to any standard or special height. Curbs feature continuously welded seams and rib pockets [Model MRSS, MRLC], and are lined with 1-1/2" fiberglass insulation. Curbs are furnished with 1/4" polystyrene gasket on top ledge and a cricket-style water diverter to prevent pooling of water.
Metal Roof Curbs download pdf

Special Roof Curbs For Restaurant Exhaust - Download templates

Restaurant roof curbs are designed to comply with applicable NFPA [National Fire Protective Association] code requirements as well as a variety of local requirements. Specialized restaurant curbs are made with the same rugged features found in standard RF-style and SF-style curbs. In addition, units can be equipped with 4" x 1/2" ventilation slots to release trapped heat from kitchen exhaust ducts.
Restaurant Exhaust Roofcurbs download pdf

Roof Curb Adapters - Download templates

Roof curb adapters are designed to fit new equipment to existing curbs. Constructed of 18 ga. galvanized steel with continuous welded seams. 1/4" polystyrene gasket on top ledge. Available as an enlarger or reducer.
Roof Curb Adapter download pdf

Sound Attenuating Roofcurbs - Download templates

Acoustical sound attenuating roof curbs have a special sound absorbing material designed for use with power roof ventilators where quiet operation is required. Sound curbs are designed with streamlined air flow passages using a core of modular sound absorbing cells of special fiberglass held in a galvanized steel frame. Reduces roof fan noise transmitted back into the room or auditorium by approximately 40% yet reduces the total air flow capacity by only 3 or 4 percent. Featuring the rugged all-welded construction of our standard curbs, these sound attenuating curbs are available as Type RF, Type SF and Type RFRC. Minimum height is 16" and special heights are available.
Sound Attenuating Roofcurbs download pdf

Rooftop Unit Curbs - Download templates

We can provide roofcurbs for all major rooftop unit manufacturers equipment. If we do not have the design in our database, simply send us your submittal package and we will match the base dimensions of the RTU.
Rooftop Unit Curbs download pdf

Equipment Support Rails - Download templates

Equipment support rails are custom made to meet specific requirements. Offered in 3" to 12" widths, 8" to 24" heights and standard lengths up to 10ft. Support rails in lengths greater that 10ft. are available at additional cost. Constructed of 18 ga. galvanized steel with continuous welded seams, integral base plate and flashing, and ample internal reinforcing. Wood nailer of specified width is secured to top of rail and covered by galvanized steel counter flashing cap.
Equipment Support Rails download pdf