Start with the substrate
Brick, masonry, EIFS, stucco, metal panels, glass, coatings, sealants, and concrete react differently to pressure, chemistry, dwell time, and rinse volume. A test area helps reveal the actual risk.
Match chemistry to the condition
Organic growth, traffic film, mineral deposits, oxidation, construction residue, and graffiti are different problems. The proposal should explain what the selected method can address and what needs specialty or contact restoration.
Protect the site while cleaning
A commercial wash plan should show how the crew will manage windows, landscaping, vehicles, pedestrians, doors, drains, neighboring tenants, and any work that must stop when wind or weather changes.
