ID Garage sheathing

[Mike Lamb]

Does this material have a name? It was soft, something like cork board.

[Jim Katen]

It looks like Celotex, a soft compressed fiber product. You can break off pieces with your hand. Firtex and Homasote are similar products but they have different textures and colors. 

[Bill Kibbel]

What is the date of the home?  With the asphalt spots, it sure looks like one of the Insulite products, but there were many, many brands of fiberboard.

[Mike Lamb]

I think 1970's.