Zinc Strips vs. Zinc Sulphate – What’s Best for Moss Control on Your Roof in Longview, WA?

May 5, 2025

Why Moss is a Big Problem for Roofs in Longview, WA

Longview’s damp Pacific Northwest climate makes it a hotspot for moss growth on roofs. Moss traps moisture, lifts shingles, and shortens the life of your roof. That’s why many homeowners turn to zinc-based solutions — but should you go with zinc strips or zinc sulphate powder?

Let’s break it down.

Zinc Strips: Long-Term, Passive Protection

What Are They?

Zinc strips are narrow metal pieces installed near the peak of your roof. When it rains, zinc ions wash down the roof surface, inhibiting moss growth over time.

Pros:

  • Low maintenance after installation
  • Long-lasting (can remain effective for 5–10 years)
  • Eco-friendly with minimal runoff impact
  • Ideal for prevention rather than treatment

Cons:

  • Upfront installation cost is higher than powders
  • Less effective on existing moss
  • Requires a professional roofer for proper placement

Best For:

Homeowners in Longview looking for long-term moss prevention without constant reapplication.

Zinc Sulphate Powder: Quick, Affordable Treatment

What Is It?

Zinc sulphate is a powder or granule you sprinkle directly on moss-covered areas. Rainwater activates the compound, killing the moss within days to weeks.

Pros:

  • Fast-acting treatment
  • Cost-effective upfront
  • Easy DIY option for small problem areas

Cons:

  • Needs reapplication every 6–12 months
  • Can harm nearby plants if runoff isn’t controlled
  • May corrode metal gutters over time
  • Not ideal for long-term prevention

Best For:

Homeowners who need a quick fix for visible moss and are comfortable with routine maintenance.

Our Recommendation at Revival Roofing

At Revival Roofing in Longview, WA, we often recommend a combination approach:

  • Use zinc sulphate to kill existing moss.
  • Follow up with zinc strips for lasting prevention.

We also stress the importance of professional roof inspections and safe moss removal practices — using the wrong method can void your roof’s warranty or cause structural damage.

Final Thoughts: Choose the Right Moss Control for Your Roof

If you’re wondering whether zinc strips or zinc sulphate are right for your roof in Longview, WA, consider your budget, goals, and willingness to maintain the system.

Need expert help? Contact Revival Roofing for a free moss control consultation and quote. We’re proud to serve Cowlitz County with honest, experienced roofing solutions.