Roof Curb Purpose

Its construction is intended to support compression loads exceeding 1 000.

Roof curb purpose.

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. Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer. Once the roof curb is in place it is to be covered with roofing material for a water tight seal. And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday.

One specification required saves time and money eliminates confusion in trades. Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out. Curb installation should be a part of the roof deck not on top of insulation or roofing materials. Single source responsibility one contractor to co ordinate and install all curbs.

The size of your roof curb should be from 1 5 1 75 smaller than base of your fan. The primary function of the curb is to keep weather out while supporting flashing the equipment on it. Special purpose roof curbs equipment supports curb extensions gpe special purpose roof curbs description 1 inch 25 mm insulation flashing flange available heights inches mm gpfhl for heavy load applications. The flashing of the roof curb allows for mechanical fasteners to be used so that the curb is bonded to the roof.

If you have an existing curb that is larger than the new fan base you can order a roof curb adaptor that will allow for a. Curbs should be a minimum of eight inches above the finished roof and factory insulated to reduce condensation. All roof curbs delivered at the same time eliminates any delay in project all curbs mounted at one time. Proper curb style matches roof system and eliminates leak situations eliminates costs by preventing roofer from having to alter curb to meet design requirements.

Curbs can be insulated when needed and accommodate roof vent sizes ranging from 4inch to 48inch in diameter. 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.