I have an odd project, and don't possess the proper tool. I need to remove homasote from the underside of a concrete garage roof. I basically want a big scrapper. I'm thinking hammer drill in hammer only mode with a chisel should work well, and be very light use on the tool.
If you've got one to loan or an even better idea let me know. I'd prefer not to pressure wash, as sealing the roof / slab so it stops leaking is the next task.