Johnny Tsunami Answers The Most Common Exterior Cleaning FAQs

We believe the best customers are informed customers. At Johnny Tsunami, we’re not just here to clean but also to educate our customers. Below you’ll find answers to the most common questions we get from local homeowners and business owners about exterior cleaning, roof care, gutter maintenance, solar panel cleaning, pricing, and seasonal protection in the Pacific Northwest.

“These guides help you make smart decisions, understand service expectations, and know exactly what to expect when you book exterior cleaning with us.”

Helpful Answers. Straightforward Advice

Soft washing is a low-pressure cleaning method that uses specialized cleaning agents to break down grime, algae, and moss. Pressure washing relies on high-pressure water to blast away dirt. Pressure washing is ideal — ideal for concrete and hardscapes but not safe for concrete and hardscapes, but not safe for roofs, windows, or siding. Soft Washing:
  • Safe for shingles, vinyl, stucco, and older surfaces
  • Extends surface lifespan
  • Kills mold, mildew, and algae at the root
Pressure Washing:
  • Best for patios, driveways, brick, and walkways
  • Can damage paint, shingles, and seals if used improperly
At Johnny Tsunami, we assess the material and use the correct technique — not a one-size-fits-all approach.

Absolutely — and in fact, it’s the preferred method. Our biodegradable cleaning solution is designed to kill and remove moss, mold, and mildew without causing harm to your roofing materials, paint, or landscaping. Unlike pressure washing, which can void warranties and strip surfaces, soft washing is gentle and thorough.

Our technicians follow industry best practices, stay OSHA-compliant, and perform a pre-clean walkthrough to ensure everything is protected and prepared.

Eventually — yes. But our professional treatment significantly delays regrowth. Most roofs stay clean for 12–18 months depending on your tree coverage, weather exposure, and drainage.

We recommend an annual maintenance plan for moss prevention, gutter flow control, and touch-up treatments. We also provide guidance on trimming overhanging trees, clearing roof valleys, and keeping surfaces dry to slow moss growth.

Unless your roof has structural issues or widespread shingle failure, cleaning is almost always the better first step. Soft washing removes years of buildup, reveals the true condition underneath, and helps you avoid premature replacement costs.

We’ll inspect and advise you honestly — if it just needs cleaning, we’ll say so. If you need a roofer, we’ll point you to trusted partners.

Spring and fall are ideal:

  • Spring = remove winter debris, prep for pollen and growth
  • Fall = remove leaves, prep for rain and freezing conditions

We clean year-round, weather permitting. Our team knows how to work safely in wet conditions and can flex around your schedule.

The PNW is a moss paradise:

  • Constant rain and cool temps
  • Tree shade and minimal sun exposure
  • Leaves and needles collecting moisture

Unchecked moss can damage shingles, trap moisture, and lead to leaks. Cleaning it off and applying preventative treatment is the smartest way to protect your roof and gutters from long-term damage.

Here’s what we recommend:

  • Gutters: Twice yearly (Spring and Fall)
  • Siding: Once a year minimum — more if you have trees or algae
  • Solar panels: Every 6–12 months for optimal efficiency

Regular cleaning keeps your home healthy, your curb appeal sharp, and your energy savings intact. We’ll help you build a schedule that fits your home and your goals.

Our customers Reviews

John Hodges profile pictureJohn Hodges
05:18 01 Apr 26
Had roofs/gutters cleaned & washed. Also, had additional screen reinforcement around chimney top to prevent critters from coming down the flue. Shawn & Daryl started the job on the first day, they did a fantastic job in spite of not having an optimal ladder for the job site. Second day, Gavin & Daryl came out, they did a fantastic job in spite of not having an optimal ladder. Third day, Gavin came back with a taller ladder to finish the job and install additional chimney screen. He did an amazing job with everything; he’s conscientious and thorough. And as requested, he sent us LOTS of photos afterwards.
We are happy with the service the guys provided. A shout out to Gavin, Shawn & Daryl for working so hard, and a job well done!
Ronald Buford profile pictureRonald Buford
03:31 31 Mar 26
JP was great to work with. You can tell he wants the business. Gave me a good quote, got here a little early ( said 0900 to 11 and got here at 0845 to work) and stayed till the job was done ? And it was a lot). I would recommend them to anyone!!!!!!!
Jim Hillier profile pictureJim Hillier
20:41 29 Mar 26
Considering the torrential rain, Gavin was very good at cleaning our gutters and roof. He also cleaned up all debris that came off roof during the rain. Time will tell how it went, but I am very pleased so far.
Jennifer Frey profile pictureJennifer Frey
23:41 27 Mar 26
Dillon provided more than 5 star service when performing soft roof wash/moss removal, siding wash, gutter cleaning, window and screen cleaning inside and out. Friendly, communicative, neat, respectful of the property. Very pleased. Recommending to my neighbor and employer.
Sandy Sosebee profile pictureSandy Sosebee
22:51 27 Mar 26
Dalton and Quentin soft washed the roof on our home and shed. They also blew debris from another shed that wasn’t even part of the job, as well as cleaned our windows. They were friendly, knowledgeable and professional. We highly recommend their work! We also want to say that JP, who came out to do the estimate, was also very friendly and professional in working with us to get the best roof treatment within our budget. Great experience all around!
Lucas Nickell profile pictureLucas Nickell
06:02 25 Mar 26
Quoted me $2,100 for a roof cleaning and gutter washing. Absolutely ridiculous.
Nick Hoyt profile pictureNick Hoyt
00:55 24 Mar 26
we were referred to this company by friends who were pleased with their work. the gentlemen were professional, friendly, and hard workers. they showed up slightly ahead of the appointed time and called to advise us of their presence. we would highly recommend this business.
David Smithson profile pictureDavid Smithson
20:36 20 Mar 26
Great job!
david coatsworth profile picturedavid coatsworth
00:27 18 Mar 26
Ty Jensen and his colleague, Dalton, did an outstanding job cleaning my roof and prepping it to control future moss growth. I am very grateful for their diligent and hard work and for explaining exactly what work they performed today. They are excellent workers employed by an excellent company. I have entrusted Johnny Tsunami to maintain my roof so that it outlives me. Thank you for such a great service.
Lynn Fritsche profile pictureLynn Fritsche
18:06 17 Mar 26
Merrill did an excellent cleaning job on our roof, today. He is a great service tech representative for Johnny Tsunami of Silverdale, WA. Merrill was punctual, very informative about the process and methodical in his work; all traits which put me at ease and made me feel I was getting very good value (in tapping my limited resources) for services rendered. Thanks, Merrill!
Karen Crouse profile pictureKaren Crouse
21:02 16 Mar 26
We have had you for many years for roof cleaning. Ty and Tristan did the best and most thorough cleaning of than any of the previous workers. I will specifically ask for them the next time we have our roof and solar panels cleaned. Please give them our thanks.
Mal Wright profile pictureMal Wright
20:07 14 Mar 26
Fair price. Very knowledgeable technician. Superb attention to detail and very helpful suggestions. I would hire this technician (Merrill) any day of the week for virtually any job around the house. He's that good.

Let’s Get Your Home Sparkling Again

It’s time to say goodbye to dirt and moss and hello to a cleaner, brighter home! From roof cleaning to pressure washing, we’re here to help.