Roof Curb Height Requirements

In no case should the curb be less than 14 inches in height.

Roof curb height requirements.

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. Windows and doors are to be a minimum of 16 above the roof line. 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. 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.

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. 0 25 inches 6 ft. Comply with local code requirements for minimum curb height but in no case shall curb height be less than 18 inches as measured from top of bar joist to top of curb nor shall curb height be less than 8 inches as measured from top of roof membrane to top of curb. 0 20 inches 5 ft.

Flat or sloped. Different panels can have different profile styles and rib height requirements. See figure 6 6. Minimum flashing height requirements are 8 for all mechanical skylights wall flashings or any other item that extends 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. This is a minimum flashing height. 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.

Paint color can be useful to know as well since rooftop curbs can be custom painted to match your roof. Vibration isolated curbs see figure 12 vibration isolated curbs is available on a special quoted basis. Curb heights vary in increments of 4 00 from 14 00 to 34 00. Specify prefabricated roof curbs and related products by a roof curb manufacturer not with or by the equipment manufacturer.