Purpose Of A Roof Curb

The curb is secured into place and roofing material is extended all the way up the sides of the curb.

Purpose of a roof curb.

Seismic rating requirements are not just limited to buildings in a seismic zone many government buildings and buildings designated as defense shelters also require seismically rated curbs. When a building is constructed prior to the installation of the hvac rooftop unit rtu the roof is cut and a metal structure called a roof curb is installed. You see without a roof curb there would be no way to securely attach your fan to the rooftop. Roof curbs allow the installation of the primary roof and the flashings around this roof curb prior to the delivery of the actual roof equipment and the setting of this equipment.

Additional benefits of a seismically calculated curb. Specify prefab roof curbs for use with all roof penetrations and roof mounted equipment including and not limited to hvac units duct openings pipe penetrations power roof exhauster intake and relief vents flues or job fabricated items. Specify prefabricated roof curbs and related products by a roof curb manufacturer not with or by the equipment manufacturer. An added bonus of a seismic calculated rated curb is the protection against high wind damage.

Exhaust fan roof curbs may be little more than a simple metal box but the function they serve is a very important part of your commercial kitchen upblast fan system. The primary function of the curb is to keep weather out while supporting flashing the equipment on it. Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out.