Johnny Tsunami Answers The Most Common Exterior Cleaning FAQs

Roof cleaning costs in Washington typically range from $450 to $1,200 depending on your roof’s size, pitch, material, and how much moss or debris is present. At Johnny Tsunami, our average roof cleaning runs around $700 for standard residential properties. This cost ensures that your roof receives the right treatment, prolonging its life and improving your home’s overall curb appeal.
What affects pricing:

• Square footage
• Roof complexity and steepness
• Moss buildup severity
• Accessibility (multi-story homes, landscaping)

We offer transparent estimates and bundled pricing if combined with gutter or siding cleaning. Our technicians will walk you through the scope, explain the pricing, and deliver a clear estimate. If you’re in Kitsap County, King County, or surrounding counties, contact us for a custom quote tailored to your property’s unique needs

Moss Removal pricing depends on several key variables:

• Roof condition (severe moss = more labor and chemical application)
• Treatment area (partial or full roof coverage)
• Type of roof (metal, composite, tile — all require different approaches)
• Height, pitch, and overall accessibility

Soft Washing pricing is based on the total surface area cleaned and whether you’re treating siding, driveways, patios, fences, or concrete surfaces. Our process includes a low-pressure application of eco-safe solution, rinse, and optional preventative Moss Control. We’ll inspect your property and help prioritize what services bring the best ROI.

• Roof + Gutter Cleaning
• Gutter + Siding Washing
• Whole-home Exterior Clean + Windows + Decks

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.