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(206) 659-4349
K Single Corp
Roof Cleaning

Roof Cleaning Services in Seattle

Professional roof cleaning and moss removal for Seattle homes. Extend your roof's life with safe, effective cleaning from K Single Corp.

Get a Free Estimate Call (206) 659-4349
25+
Years Experience
15,000+
Projects Completed
4.7★
Google Rating
10-Year
Workmanship Warranty

Professional roof cleaning in Seattle costs $300 to $600 for a standard home and can extend your roof’s life by 5 to 10 years. K Single Corp uses safe soft wash methods and professional moss removal to protect your shingles, with optional zinc strip installation to slow regrowth between cleanings.

Moss is one of the biggest threats to residential roofs in the Seattle area. The combination of shade from mature trees, persistent moisture, and mild temperatures creates ideal growing conditions. Left unchecked, moss lifts shingle edges, traps moisture against the roof surface, and accelerates granule loss. A roof that should last 25 to 30 years can fail in 15 to 20 if moss is never addressed.

Why Roof Cleaning

What Sets Us Apart

Safe Soft Wash Methods

Low-pressure cleaning that kills moss and algae at the root without blasting away protective shingle granules.

Professional Moss Removal

Heavy moss growth carefully removed with specialized tools, working top-down to avoid lifting shingle edges.

Zinc Strip Prevention

Zinc strips installed along the ridge release particles that inhibit future moss and algae growth between cleanings.

Extends Roof Life 5 to 10 Years

Regular cleaning prevents moss damage that can shorten your roof's lifespan by a decade or more.

At a Glance

Typical Cost

$300 – $600

WA License

KSINGSC842B3

Credentials

Licensed, Bonded, Insured

Service Area

King, Snohomish, Pierce

Warranty

10-year workmanship

Get a Free Estimate

How Much Does Roof Cleaning Cost?

$300 – $600

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Our Roof Cleaning Process

1

Roof Inspection

We check for loose, damaged, or missing shingles and any structural concerns before cleaning begins.

2

Debris Removal

All leaves, branches, pine needles, and loose debris cleared from the roof surface, valleys, and penetrations.

3

Moss Removal

Heavy moss growth carefully removed with specialized tools, working from the top down.

4

Soft Wash Treatment

Professional-grade cleaning solution applied at low pressure to kill remaining moss, algae, and lichen at the root level.

5

Zinc Strip Installation

Optional zinc strips installed along the ridge to slow future moss and algae regrowth between cleanings.

6

Gutter Cleaning

Gutters and downspouts cleaned as part of every roof cleaning to prevent clogs from removed debris.

4.7 from 171+

What Our Customers Say

Read all reviews

I had a great experience with K Single Corp Roofing. They did excellent work, finished earlier than expected, and left e...

AK
A Kap
Google Review

They did a good job for a couple of our projects. Highly recommended.

MG
Mok Gary
Google Review

They did a great job. Communicated well, showed up timely for the work, worked diligently and finished earlier than expe...

TJ
Tammy Jensen
Google Review

Great work, super fast, clean, and professional work. Great communication from the workers and the office staff. Would 1...

CR
Carlos Rosario
Google Review

The company has been a pleasure to work with. Reasonable price. Nice, competent crew. Responsive front office.

JN
Joe Neal
Google Review

I've used K Single multiple times for different jobs. Joel is easy to work with and the crews do very nice work, going a...

HC
Henry Chism
Google Review

We had a very good experience with them. They were fast and efficient, and were less expensive than another roofing comp...

WJ
Warren Jackson
Google Review

I had a very good experience with the team that worked on our house. I'd use them again in a heartbeat.

AP
Andrea Proctor
Google Review

Joel and the other staff were great to work with as were the crew members. Communication could be a bit better but other...

OA
Omar Akkari
Google Review

A very good company to work with.

BG
Bruce Gracey
Google Review

Isidro and his crew were fantastic. They showed up on time, worked crazy hard and long hours, cleaned up spotlessly and...

D
Darren
Google Review

Value and quality, but most importantly, they clean up after themselves every night! That's huge!

JF
Joe Fain
Google Review

Common Questions

Frequently Asked Questions

How much does roof cleaning cost in Seattle?
Professional roof cleaning in Seattle typically costs $400 to $1,000 for a standard home. The price depends on roof size, pitch, the amount of moss and debris, and the cleaning method used. Roof cleaning with moss treatment usually falls in the $500 to $800 range for most homes.
How often should I have my roof cleaned in Seattle?
Most Seattle-area roofs should be cleaned every 2 to 3 years. Homes surrounded by trees or in heavily shaded areas may need cleaning annually. Regular cleaning prevents moss from establishing deep root systems that damage shingles and reduces the risk of premature roof failure.
Does moss really damage my roof?
Yes. Moss lifts shingle edges, allowing water to penetrate underneath. Over time, moss roots break down the shingle surface, accelerating granule loss and reducing waterproofing ability. A thick moss layer also traps moisture against the roof, promoting rot in the decking below. In Seattle's wet climate, unchecked moss can shorten a roof's life by 5 to 10 years.
Is pressure washing safe for roofs?
No. High-pressure washing damages shingles by blasting away protective granules and can force water under the shingles into the roof deck. K Single Corp uses low-pressure soft washing methods that are safe for all roofing materials. We combine gentle rinsing with professional-grade cleaning solutions that kill moss and algae without damaging your roof.
What is the best time of year for roof cleaning in Seattle?
Late spring (April through June) and early fall (September through October) are the best times for roof cleaning in Seattle. Spring cleaning removes moss and debris after the wet season. Fall cleaning clears leaves and prepares the roof for winter rains. Avoid cleaning during freezing conditions or heavy rain.
Do zinc strips prevent moss growth?
Yes. Zinc strips installed along the ridge of your roof release zinc particles when it rains, creating an environment that inhibits moss and algae growth. They are not a complete solution on their own, but they significantly slow regrowth between professional cleanings. K Single Corp installs zinc strips as part of our roof cleaning service.
Can you clean a cedar shake roof?
Yes. Cedar shake roofs require specialized cleaning techniques different from composition shingle roofs. We use gentle cleaning solutions and low-pressure methods that clean the wood without damaging the natural texture. Cedar roofs benefit greatly from regular cleaning because moss and debris trap moisture that accelerates wood decay.
Will roof cleaning void my warranty?
Proper soft washing does not void manufacturer warranties. In fact, many shingle manufacturers recommend regular roof cleaning as part of proper maintenance. High-pressure washing, however, can void warranties because it damages the shingle surface. K Single Corp only uses manufacturer-approved cleaning methods.

Serving the Greater Seattle Area

Licensed, bonded, and insured across King, Snohomish, and Pierce counties.

Seattle Bellevue Redmond Kirkland Renton Kent Tacoma Burien Issaquah Bothell All Service Areas

Other Services We Offer

From roofing to siding, gutters, decks, and more. K Single Corp handles it all.

Residential Roofing

Residential Roofing

Complete residential roofing services for Seattle-area homeowners. From full replacements to storm damage repairs, K Single Corp delivers proven results backed by 25+ years of experience.

 Commercial Roofing

Commercial Roofing

Reliable commercial roofing for Seattle-area businesses. TPO, PVC, metal, and flat roof systems installed and maintained by K Single Corp's experienced crew.

 Roof Installation

Roof Installation

Professional new roof installation for Seattle homes and businesses. Every material type, expert crews, and a 10-year workmanship warranty from K Single Corp.

 Roof Repair

Roof Repair

Fast, reliable roof repair for Seattle homes and businesses. Fix leaks, storm damage, missing shingles, and flashing failures. Emergency service available.
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Ready to Get Started?

Request a free estimate and find out why 15,000+ homeowners trust K Single Corp.

Get Your Free Estimate Call (206) 659-4349

Most estimates completed within 24 hours.