What is this exterior wall sheathing?
Forgive the crude photos, it is the only markings I have found and it needs alot of light to make the words visible.
The house built in 1975, the sheathing and siding both 1/2 inch thick.
I’m thinking it’s beaverboard or some type of fiber board I also have a cutaway of the material the sheathing has a black paper or felt adhered to both sides.
Thanks for your time.
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