Basic
$0.17 – $0.50 per sq ft
Soft wash with a standard algaecide mix in one application, loose moss brushed off, plants pre-wetted and rinsed
How Much Does Clean Roof Shingles Cost in Portland, Maine?
Soft-wash cleaning of an asphalt shingle roof to remove algae, moss and stains.
Clean Roof Shingles in Portland, Maine typically costs $0.20 to $0.59 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Clean Roof Shingles in Portland, Maine
$0.20 – $0.59
per sq ftPrices in Portland are 1.0% lower than the national average for clean roof shingles.
National average: $0.20 – $0.60 per sq ft
What you get at each price level
Standard
$0.20 – $0.59 per sq ft
Soft wash at a mix strength suited to asphalt shingles, surfactant for dwell, moss removed by hand, plantings wetted and rinsed
Premium
$0.25 – $0.74 per sq ft
Soft wash with longer dwell plus a second spot application on heavy streaks, moss hand-removed, plants covered, downspouts rinsed
Cost Breakdown in Portland
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.09 – $0.26 | sq ft |
| Labor | labor | $0.07 – $0.20 | sq ft |
| Supplies & Other | supplies | $0.02 – $0.08 | sq ft |
| Equipment & Disposal | equipment | $0.02 – $0.05 | sq ft |
Prices adjusted for Portland local market conditions.
Clean Roof Shingles photo examples
Gray asphalt shingle roof slope with dark algae streaks running down it
Photo: Mcbooz · CC BY-SA 3.0 · Source
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Cost Factors in Portland, Maine
What Affects Pricing
- Materials ($0.09-$0.27 per square foot)
- Labor ($0.07-$0.20 per square foot)
- Supplies & Other ($0.02-$0.08 per square foot)
- Equipment & Disposal ($0.02-$0.05 per square foot)
Local Price Adjustments
Material costs3.0% below avg
Labor costsAt national average
Frequently Asked Questions
References
- How Much Does Roof Cleaning Cost? - This Old House, This Old House, retrieved Nov 2026
- Construction wages by metro and rural area, used for the labor adjustment by ZIP code, U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025
- Regional price parities for goods, used for the materials adjustment by ZIP code, U.S. Bureau of Economic Analysis, 2024
Get Free Estimates in Portland
Connect with local clean roof shingles contractors in Portland for personalized quotes based on your specific project.