Quote:
Originally Posted by Captain Ahab Jr
I get it but I'd never attack an old stone house with a power washer rather than the gentler approach with a brush
With a house that is that old you may find below an outer mortar layer the stone is held together with mud and horse hair and the internal wall cavity is just loose rubble
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It's a fine looking foundation wall, the kind it is hard to get apart because the stones all fit together. I too am pretty happy with a long handled brush and a five gallon bucket for washing down the wall.
A respirator is a must for getting the old mortar out, and the dirt out. If you can figure out a way to use a fan to pull air out of the space, it would be a great boon to your project.