Roof Algae Severity Quiz
Score visible streak coverage from 1 to 4 using age, tree cover, and north face. Typical-candidate language is educational, not a diagnosis.
- Severity 1–4
- Appearance only
- Educational only
Get a local soft wash quote
Send the job size from this estimate. This page does not sell washing services and does not promise a crew, price, or appointment.
A roof algae quiz answers a visual question: how much streaking are you describing, and do common shade or age factors show up? Choose none, light specks, bands, or heavy coverage. Add a roof age band, whether trees cover the roof, and whether a north face is in play.
Coverage sets the base score. A 20+ year roof can bump light or banded answers by one step. Light streaks plus trees and a north face can bump again, still capped at 4. No visible streaks stay at 1 even if the yard is shady. None of that identifies a species or a leak.
Scoring runs in your browser. A quote request is sent only if you submit the form. Browse the Household hub, or open the soft wash mix calculator, house sq-ft estimator, or vinyl siding cleanability checker.
How to use the roof algae severity quiz
- Choose streak coverage: none, light, bands, or heavy.
- Pick a roof age band.
- Say whether trees cover the roof and whether a north face is involved.
- Read the 1–4 score and the typical-candidate note.
- Optionally submit name, phone, ZIP or city, surface, and square feet for a local quote request.
Frequently asked questions
Is a roof algae severity score a diagnosis?
No. This quiz returns an educational 1–4 appearance score from streak coverage, roof age, tree cover, and whether a north face is involved. It is not a roof inspection, leak test, or manufacturer claim.
What do the 1–4 severity levels mean?
1 is little or no visible streaking. 2 is light specks. 3 is distinct bands. 4 is heavy coverage, or lighter streaks plus age or shade factors. Levels 2–4 are labeled a typical soft-wash candidate from appearance only.
Why do trees and a north face matter on a roof algae quiz?
Shade and moisture are commonly discussed with dark roof streaks. This page can bump a light-streak score when both tree cover and a north face are present. That is an educational hint, not proof of algae species.
Does roof age change the score?
A 20+ year band can raise a light or banded score by one step, capped at 4. Older roofs are often where people first notice streaks. Age alone does not diagnose the roof.
What happens when I request a local soft wash quote?
The form collects name, phone, ZIP or city, surface, and square feet. Surface prefills to roof. This site does not sell washing services and does not promise a price, crew, or appointment.
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