Roof Cleaning Tips: Keep Your Roof Clean, Safe, and Long-Lasting

If you own a home in Spokane or the surrounding area, roof cleaning is something you shouldn’t ignore. It’s not just about making your roof look better—it’s a key part of preserving its integrity, protecting your investment, and avoiding expensive repairs.

Whether you’ve noticed roof moss, dark streaks, or stains forming on your shingles, it’s time to take action. In this guide, we’ll walk you through everything you need to know about roof cleaning, including how to remove moss, which methods are safe, and how to keep your roof clean long-term.

Why Roof Cleaning Matters More Than You Think

Your roof is constantly exposed to sun, rain, wind, and organic buildup. Without regular maintenance, dirt and biological materials like moss and algae begin to take over.

Here's what happens when you skip roof cleaning:

Moss retains moisture, leading to shingle decay and wood rot

Algae stains can make your roof appear older and poorly maintained

Lichen growth can eat into roofing materials over time

Mold and mildew can spread to your attic and ceilings

Debris buildup may cause improper drainage, increasing leak risks

Dirty roofs reduce energy efficiency by holding excess heat

Ignoring roof moss and dirt doesn’t just look bad—it shortens the life of your roof.

Common Causes of Roof Moss and Staining

Moss and algae love moisture and shade. If your home is near tall trees or doesn’t get enough sun, your roof is the perfect breeding ground.

Most common causes of moss and stains:

Overhanging branches blocking sunlight

Clogged gutters causing water pooling

Leaves and debris collecting in roof valleys

North-facing slopes that stay damp longer

Humid or rainy seasons that promote moss growth

Poor ventilation that traps moisture under the shingles

If you see fuzzy green growth on your shingles—it’s time to remove moss before it causes structural damage.

Safe Roof Cleaning Methods (Soft Wash vs. Pressure Wash)

There’s a lot of debate about how to clean a roof properly. Some people recommend pressure washing, while others prefer soft washing. The truth? It depends on your roof’s condition and material.

Soft Washing – The Safer Method

Soft washing uses low pressure and eco-safe cleaning solutions to break down dirt, moss, and algae without damaging the roof surface.

Pressure Washing – When (and Why) to Avoid It

High-pressure washing may seem effective, but it can dislodge shingles, strip protective granules, and lead to leaks. It should only be used on metal or tile roofs in good condition—and even then, with caution.

How to Remove Moss from Your Roof Safely

Moss removal is a major part of roof cleaning, but it must be done carefully to avoid causing more harm than good.

6 Safe Steps to Remove Roof Moss

Brush Off Loose Moss – Use a soft-bristle broom; never scrape or pull hard

Apply Moss-Killing Solution – Use commercial or DIY roof moss treatments

Let It Sit and Soak In – Most treatments need 15–30 minutes to activate

Rinse Gently – Use a hose on low pressure, not a power washer

If done incorrectly, moss removal can loosen shingles or even void your roof warranty.

Eco-Friendly Moss and Roof Cleaning Solutions

If you’re concerned about the environment—or pets, kids, and nearby plants—there are eco-friendly roof cleaning options available.

Safe Cleaning Solutions You Can Use

Oxygen bleach – Kills moss and algae without harming landscaping

Vinegar + water – Gentle and natural but less powerful than commercial cleaners

Zinc or copper-based treatments – Prevent moss regrowth over time

Baking soda – An old-school remedy, but only useful for small patches

Low-VOC commercial products – Read labels to ensure they’re safe for use

Avoid using household bleach—it may kill moss but can also corrode metal flashing and ruin plants below.

How Often Should You Clean Your Roof?

In Spokane’s climate, roof cleaning isn’t just a one-time task. Preventive care goes a long way.

General roof cleaning schedule:

Once per year – Minimum recommended for most homes

Twice per year – For shaded or tree-covered roofs

After heavy storms – Check for debris buildup and moss start

Before selling your home – Boost curb appeal and perceived value

Routine cleaning can extend the life of your roof by 5 to 10 years or more.

Tools & Safety Gear for DIY Roof Cleaning

Thinking about doing it yourself? You’ll need more than just a ladder.

Must-have equipment:

Safety harness with roof anchors

Non-slip shoes and gloves

Garden hose with sprayer

Soft-bristle broom or roof brush

Cleaning solution for moss and algae

Protective goggles and dust mask

Important: Never work alone on the roof, and never step on wet shingles—they’re slippery and dangerous.

How to Prevent Roof Moss from Coming Back

Prevention is the key to avoiding constant roof moss battles.

6 Tips to Prevent Moss and Algae Regrowth

Trim back overhanging tree branches

Install zinc or copper strips along roof peaks

Keep gutters clean for proper drainage

Avoid letting leaves pile up on your roof

Improve attic ventilation to reduce moisture

Schedule yearly roof inspections and cleanings

Following these tips can save you thousands in roof repairs down the line.

Why Choose Professional Roof Cleaning Over DIY

While DIY may seem appealing, roof cleaning isn’t always safe or easy. Professional roof cleaning services have:

Proper safety equipment and training

Knowledge of the right methods for your roof type

Commercial-grade, eco-safe cleaning solutions

Experience identifying hidden roof issues

The ability to complete the job quickly and safely

Insurance and guarantees for peace of mind

Trying to remove roof moss with household tools may lead to bigger problems—like leaks or shingle damage.

Roof Cleaning FAQ – Quick Answers for Homeowners

Not if done correctly. Soft washing is gentle and safe for asphalt, tile, and metal roofs.

Not always—but if you’ve had moss in the past, check annually to catch regrowth early.

It’s not recommended for shingles. Use soft washing unless it’s a metal or tile roof.

Yes, especially zinc- or copper-based solutions with proper application.

You can, but it requires caution, equipment, and time. Many homeowners prefer professional help.

Spring or early fall—when weather is dry and cool but not freezing.

Let Us Handle Your Roof Cleaning – So You Don’t Have To

You don’t need to risk climbing ladders or experimenting with homemade solutions. LAV Spokane Painters specializes in roof cleaning, moss removal, and long-term roof maintenance. We use safe, effective, and environmentally friendly methods to keep your roof clean, your home protected, and your curb appeal sharp.