Professional Roof Cleaning
Remove moss, algae, lichen & organic staining without aggressive pressure washing.
Professional roof cleaning using ClenzO2 products.
Professional Roof Cleaning
Alpha Roofing & Restoration provides professional roof cleaning services for homeowners throughout the greater Seattle area and King County. Moss, algae, lichen, and organic staining are among the most common — and most overlooked — threats to a roof's long-term performance.
We use ClenzO2 products as part of our professional cleaning process. Our approach is thorough, careful, and designed to protect your roofing system while removing the organic growth that shortens its lifespan.
Moss, Algae & Organic Roof Staining
The Pacific Northwest's persistent moisture and mild temperatures create ideal conditions for moss, algae, and lichen to establish themselves on roof surfaces. Left untreated, these organisms cause real damage over time.
Moss holds water against shingle surfaces long after rain stops, accelerating granule loss and allowing moisture to work its way under shingles and into the underlayment. Algae produces dark streaking that traps heat and degrades shingle surfaces. Lichen bonds directly to shingles and is among the most difficult growth to remove without professional treatment.
Regular professional cleaning removes existing growth and can significantly extend the useful life of your roofing system.
Moss
Holds moisture against shingles, accelerates granule loss, and can lift shingle edges over time.
Algae
Causes dark streaking, traps heat, and degrades shingle surfaces — common on north-facing slopes.
Lichen
Bonds directly to shingles and is the most difficult organic growth to remove without professional treatment.
Organic Staining
Debris, tannins, and organic matter from overhanging trees leave staining that traps moisture and promotes further growth.
Professional Cleaning Using ClenzO2
Alpha Roofing & Restoration uses ClenzO2 products as part of our professional roof cleaning process. ClenzO2 is a professional-grade cleaning solution designed specifically for roof surfaces.
Our cleaning process is applied by trained roofing professionals who understand how to treat different roofing materials safely and effectively. We follow manufacturer application guidelines and take care to protect your landscaping, gutters, and surrounding surfaces throughout the process.
No Aggressive Pressure Washing
High-pressure washing is one of the most damaging things you can do to an asphalt shingle roof. The force strips granules from shingle surfaces, voids manufacturer warranties, and can drive water under shingles — causing the very damage you were trying to prevent.
Our professional cleaning approach does not rely on high-pressure washing. We use low-pressure application methods combined with professional-grade cleaning solutions to remove moss, algae, and organic growth without damaging your roofing system.
Roof Inspection Before Cleaning
Before we begin any cleaning work, we conduct a thorough roof inspection. This lets us identify any existing damage, areas of concern, or underlying issues that should be addressed before cleaning begins.
If we find damage during the inspection — missing shingles, failing flashing, cracked sealants, or signs of moisture intrusion — we will document it and discuss repair options with you before proceeding. Cleaning a roof with unaddressed damage can allow water to enter areas that would otherwise stay dry.
The inspection is included with your roof cleaning estimate at no additional charge.
Why Professional Roof Cleaning Matters
Extends Roof Lifespan
Removing moss, algae, and lichen before they cause structural damage is one of the most cost-effective ways to get more years out of your existing roof.
Protects Your Investment
A roof replacement is a significant expense. Regular cleaning and maintenance helps you defer that cost by keeping your current roof performing as long as possible.
Prevents Hidden Damage
Organic growth traps moisture against roofing materials, leading to rot, granule loss, and premature failure that often isn't visible until it becomes a serious problem.
Improves Curb Appeal
Dark streaking, green moss patches, and organic staining are among the most noticeable signs of a neglected roof. Professional cleaning restores a clean, well-maintained appearance.
Done by Roofing Professionals
Unlike general pressure washing services, our team understands roofing systems. We know what to look for, how to treat different materials, and how to clean without causing damage.
Paired with a Full Inspection
Every cleaning job includes a roof inspection. You'll know the condition of your roof — not just its appearance — when we're done.
Before & After Results
Professional roof cleaning removes years of moss, algae, and organic staining — restoring the appearance of your roof and removing the growth that shortens its lifespan.
We will add real before-and-after photos from completed projects as they become available. If you have seen our work and want to share photos, contact us at (206) 840-8191.
Real project photos will be added here.
Real Roof Cleaning Results
See the difference professional soft wash cleaning can make.
Areas We Serve
Alpha Roofing & Restoration provides professional roof cleaning throughout King County and the greater Seattle area, including:
- Bellevue
- Newcastle
- Mercer Island
- Sammamish
- Issaquah
- Redmond Ridge
- Fairwood
- Carnation
- Fall City
- Snoqualmie
- North Bend
- Madison Park
- Mt. Baker
- Mirrormont
- Ames Lake
Not sure if we serve your area? Call us at (206) 840-8191 and we'll let you know.
Free Roof Cleaning Estimate
Call us or submit a request online. We'll schedule an inspection, assess your roof, and give you a written estimate with no obligation.
(206) 840-8191Request an Estimate Online