Help Identifying Wallboard


I’ve been doing some work in the attic and would like to identify what type of wallboard is up there. I’ve attached two photos, hopefully their good enough to identify.

Thanks for the help!

Also, in case it matters, it looks to me like plaster but I want to be sure. Any possible dangers kicking this stuff up?

Drywall with plaster on top; I have the same wallboard and plaster in my house. Dampen it down, turn furnace/AC off put fan in window to vent out. Good luck with the project and wear a dust mask.


looks like cal kote over rock lath to me…just my opinion …jim