Draftstopping shall be installed in attics and concealed roof spaces, such that any horizontal area does not exceed 3,000 square feet (279 m 2 ). Exceptions: 1. Draftstopping is not required in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.

What is the difference between fire blocking and Draftstopping?

Fireblocking and draftstopping have similar, but slightly different, purposes. As you see here, fireblocking is intended to resist the movement of flames, where draftstopping is intended to resist the passage of smoke and gases. Fireblocking is intended to resist upward movement of flames, smoke, and gases.

What is Draftstopping?

“Draftstopping” is defined in both the International Residential Code (IRC) and the International Building Code (IBC) as, “A material, device or construction installed to restrict the movement of air within open spaces of concealed areas of building components such as crawl spaces, floor-ceiling assemblies, roof- ...