Looking for some help with slate roof cleaning. Questions is not sure if pressure can or should be used on something like that. We have a lift we will be using but any suggestions on chemical use and the approach we should use to tackle this job would be really helpful. Any tips at all are welcome. Thanks guys.

AP ALL CLEAN LLC
Commercial, Industrial & Residential
Professional Pressure Washing

3410 Pine Top Dr.
Indianapolis, IN. 46227