Installing Cellulose Insulation Directly To Roof Sheathing

Cellulose Insulation Answer Man CIMA GraphicCellulose Answer Man: Your Source For Information

Gared E. asked:
Can cellulose insulation be installed directly to the roof sheathing without baffles or an air gap. There are installed roof and soffit vents as if the house was to have a vented attic and then everything has been blocked off with cellulose insulation. It is a new construction home.

Cathedral-Ceiling-In-Bedroom-CIMAThe unvented dense packed design is the recommended way to insulate cathedral or cathedralized ceilings with cellulose insulation. Below is a document with a detailed discussion of this issue and two statements of CIMA’s position on the matter. Click on any to read more.


Have a question, add it to any post or the Contact Us page here on the Greenest Insulation Blog, or use the Contact Us form on the CIMA website.

Unvented Packed Cavity Roof-Ceiling Assemblies-CIMA

CIMA Unvented letter - April 28 2003

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