TL;DR
A roof wash mix is the diluted sodium hypochlorite solution—typically 2 to 4 percent strength with a surfactant added for cling—that soft-wash contractors apply at low pressure to kill the Gloeocapsa magma algae, moss, and lichen staining asphalt shingles. ARMA, the shingle manufacturers' association, endorses chemical cleaning precisely because pressure washing strips granules and shortens roof life.
What it means
A roof wash mix is the diluted sodium hypochlorite solution—typically 2 to 4 percent strength with a surfactant added for cling—that soft-wash contractors apply at low pressure to kill the Gloeocapsa magma algae, moss, and lichen staining asphalt shingles. ARMA, the shingle manufacturers' association, endorses chemical cleaning precisely because pressure washing strips granules and shortens roof life. The streaks fade over days as the organisms die, and crews rinse landscaping throughout the application.
Where it sits in the glossary
Roof wash mix is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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