Johnny Tsunami Answers The Most Common Exterior Cleaning FAQs

• Safe for shingles, vinyl, stucco, and older surfaces
• Extends surface lifespan
• Kills mold, mildew, and algae at the root

• Best for patios, driveways, brick, and walkways
• Can damage paint, shingles, and seals if used improperly

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.