Purpose Of A Roof Curb

Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out.

Purpose of a roof curb.

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. Specify prefabricated roof curbs and related products by a roof curb manufacturer not with or by the equipment manufacturer. The primary function of the curb is to keep weather out while supporting flashing the equipment on it. Another primary function of a roof curb is weatherproofing and protecting the interior of your exhaust system from the elements.

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 roof curb is designed to support the weight of the unit and to offer a means for contractors to connect the supply return air duct work. 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. An added bonus of a seismic calculated rated curb is the protection against high wind damage.

Roof curbs are in many cases installed on the roof and temporarily covered over for waterproofing purposes much earlier than the construction schedule requires delivery of the expensive and fragile roof top equipment. You see without a roof curb there would be no way to securely attach your fan to the rooftop. 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.