How To Set A Roof Curb

The curb should be installed to the roof and or wall using appropriate type and size fastener depending on roof and or wall material.

How to set a roof curb. If the roof curb will be mounted on a new building it can be assembled at any convenient location and installed as soon as the roof support members are in place. In this case additional nailing plates must be. 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. As a genera l rule the curb should be placed directly on the roof support members.

Roofi ng may be completed after setting the unit. 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. The rooftop unit may be mounted immediately after the curb is installed. The fan base is secured to the curb using a minimum of 8 appropriately sized galvanized self drilling screws.

As a general rule the curb should be placed directly on the roof support members. Make sure the surface is free of water and debris. Any piece of material or equipment if it is not simply sitting on the top of the roof such as a condenser will have a roof curb mounted to the roof with the piece of equipment above the roof curb. And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday.

The curb can also be mounted on a roof deck. Make sure all the measurements are correct and the location is properly marked. The primary function of the curb is to keep weather out while supporting flashing the equipment on it. Prep surface area by removing all debris and water.

Make sure that the duct connection and fan inlet are properly aligned and sealed. The curb can also be mounted on a roof deck. Use tack welding or other suitable fastening method to secure the roof curb in place. Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out.

Specify prefabricated roof curbs and related products by a roof curb manufacturer not with or by the equipment manufacturer. Use tack welding or other suitable fastening method to secure the roof curb in place.