Square Roof Curb 21" Square x 12" High, Model SRC-18-H12
This roof curb is 21" long by 21" wide and 12" high and is only compatible with roof vents or fans that have a curb mount flange measuring 21.5 inches. Active Ventilation Products' prefabricated roof curbs are for flat or low-slope membrane roofs.
A roof curb is a metal box that acts as a base for a roof vent or fan. Roof curbs, which can also work as a hatch, allowing easy access to ductwork, HVAC units, or maintenance in the attic below.
Traditionally, roofers build wooden roof curbs on the roof during the membrane installation. However, building wooden curbs can cause damage to the roof membrane. This happens because of the cutting of lumber, as well as loose nails or screws that end up getting walked on by the crew. Using prefabricated aluminum roof curbs eliminates the need to build wooden boxes and reduces the chance of damaging the roof.
A key safety feature is that aluminum curbs are not flammable, unlike wooden roof curbs. Most roof curbs vent out heat from range hoods or HVAC units. This heat can cause wooden curbs to burn. However, aluminum will not burn, rust, or corrode. Aluminum curbs are safer and easier to weld.
Installation of this roof curb is for EPDM, PVC, and TPO roof membranes
The flashing on the roof curb enables mechanical fasteners to attach the curb to the roof securely. Once placed, it must be covered with roofing material to ensure a watertight seal.
AVP offers roof curbs in various sizes and with the option for insulation.
The curb mount flange, vent, and fan lines are ready to install on AVP's roof curbs. This includes Aura Vents, Pop Vents, and Round Back Vents as well as Attic Fans and Aura Solar Fans for powered ventilation.
For any questions, please email the sales team at sales@roofvents.com or call 845-565-7770
