Roof Curb Height Requirements

Curb height is the height of curb at shorter wall.

Roof curb height requirements.

Different panels can have different profile styles and rib height requirements. In no case should the curb be less than 14 inches in height. Vibration isolated curbs see figure 12 vibration isolated curbs is available on a special quoted basis. This is a minimum flashing height.

Paint color can be useful to know as well since rooftop curbs can be custom painted to match your roof. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. See figure 6 6. Specify prefabricated roof curbs and related products by a roof curb manufacturer not with or by the equipment manufacturer.

Regardless of the model a roof curb is used to mount the assembly so that it sits securely and the hole through the roof is protected. Prior to the application of roofing materials the roofing contractor should make a visual inspection of the deck surface to see that it is ready for the application of roofing materials. Maximum height of tallest wall will be 42 00. Curb heights vary in increments of 4 00 from 14 00 to 34 00.

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. 0 25 inches 6 ft. 0 20 inches 5 ft. Standard height of the curbs is approx 20 however it is necessary to measure the height of the upblast exhaust fan just to be sure the overall height to the top of the fan from the roofline is 40 it s properly covered by the 20 height.

The curb should provide a minimum clearance of 10 inches between the top of the finished roof surface and the top of the wood nailer continuous around the curb perimeter. Flat or sloped. Windows and doors are to be a minimum of 16 above the roof line. The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures.