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Roof Washing: Extend Your Roof's Lifespan and Restore Its Beauty

Feb 10
2 min read

Updated: Sep 27

Your roof is one of your home's most important investments, protecting everything inside from the elements. Over time, algae, lichen, mold, and mildew can accumulate on your roof, not only diminishing its appearance but also potentially damaging the roofing material. Professional roof washing is the solution to restore your roof's beauty and extend its lifespan.


Minnesota roof with algae before treatment.

The Problem with Roof Contamination

Algae, lichen, mold, and mildew thrive on roofs, especially in areas with high humidity or shade. These organisms don't just create unsightly black streaks and stains. They can actually damage your roofing material:

  • Accelerated Deterioration: Algae and mold can break down roofing materials, shortening your roof's lifespan.

  • Reduced Energy Efficiency: Dark stains reduce your roof's ability to reflect sunlight, increasing cooling costs.

  • Decreased Property Value: A dirty roof significantly impacts your home's curb appeal and resale value.

  • Health Concerns: Mold and mildew can pose health risks, especially for those with allergies or respiratory issues.


Why Choose Professional Roof Washing

Professional roof washing offers significant advantages over DIY methods or pressure washing:

  • Eco-Friendly Soft Washing: Our soft washing techniques use gentle, biodegradable solutions that effectively remove contaminants without damaging your roofing material.

  • Safety: Professional cleaners have the proper equipment and training to safely work on roofs.

  • Comprehensive Results: We target algae, lichen, mold, black mold, and mildew, leaving your roof looking brand new.

  • Long-Term Protection: If treated growth returns in the first year, we re-wash the affected areas free, and within two years of service we re-wash them at half cost.


    Minnesota roof with moss and algae after professional soft washing treatment included in our Roof Washing service.

Our Roof Washing Service

Roof washing typically runs $800–$1,600 — $800 for a 2,000 sq ft home and $1,600 for a 4,000 sq ft home. Yours depends on the home, so Carson confirms the exact price after he looks at it. Our service includes:

  • Complete roof cleaning using eco-friendly soft washing techniques

  • Safe for your landscaping and greenery

  • Roof Washing Warranty: if treated organic growth returns within the first year, we re-wash the affected areas free; if it returns within two years of service, we re-wash at half cost

  • Workmanship Standard: if we miss an area or leave normal cleanable residue, tell us and we'll re-clean or touch it up


Restore Your Roof's Beauty Today

Don't let your roof suffer from years of accumulated algae, mold, and mildew. Contact Glass House Window Cleaning today to schedule your professional roof washing service.

Call us at (612) 294-8796 to book your appointment or visit our Roof Washing page. Glass House is locally owner operated, fully insured, and ready to restore your roof's beauty. Serving Ham Lake, Minnesota and surrounding areas.

Frequently Asked Questions

Can algae shorten the life of my roof?

Accelerated Deterioration: Algae and mold can break down roofing materials, shortening your roof's lifespan.

Do dark roof stains affect energy costs?

Reduced Energy Efficiency: Dark stains reduce your roof's ability to reflect sunlight, increasing cooling costs.

What method is used to clean roofs safely?

Eco-Friendly Soft Washing: Our soft washing techniques use gentle, biodegradable solutions that effectively remove contaminants without damaging your roofing material.

Where we work: Glass House is based in Ham Lake and serves Blaine, Anoka and the rest of the north metro. See every city we serve, read more home care guides, or get your quote.

Glass House window cleaner washing a front door's glass, with a ladder set against the home's siding

Get a clear price for your home

Send the quote form, or call or text (612) 294-⁠8796. Carson will look at your home and confirm the exact price before any work starts.

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