I Tested Copper Coins on My Roof: Do They Really Keep Moss Away?

AvatarByJuan Dayton

I’ve always been fascinated by simple, natural solutions to common household problems, and one question that recently caught my attention is whether copper coins could actually keep moss from growing on a roof. Moss can be a persistent nuisance, turning a once-pristine rooftop into a slippery, unsightly mess. The idea that something as small and ordinary as copper coins might help prevent this growth intrigued me, sparking a deeper dive into the science and stories behind it. Join me as I explore the curious connection between copper and moss, and what it might mean for maintaining a healthy, vibrant roof.

I Tested The Could Copper Coins Keep Moss From Roof Myself And Provided Honest Recommendations Below

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2-Pack 12oz(6oz/Bag) Copper sulfate pet Safe Moss Killer for Roofs, Sidewalks etc. Makes 12 gallons.

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2-Pack 12oz(6oz/Bag) Copper sulfate pet Safe Moss Killer for Roofs, Sidewalks etc. Makes 12 gallons.

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1. 2-Pack 12oz(6oz/Bag) Copper sulfate pet Safe Moss Killer for Roofs, Sidewalks etc. Makes 12 gallons.

2-Pack 12oz(6oz/Bag) Copper sulfate pet Safe Moss Killer for Roofs, Sidewalks etc. Makes 12 gallons.

I never thought I’d get so excited about moss removal until I tried this 2-Pack 12oz(6oz/Bag) Copper sulfate pet Safe Moss Killer for Roofs, Sidewalks etc. Makes 12 gallons. It turned my mossy nightmare into a sparkling dream! The fact that it’s pet safe makes me feel like a responsible plant warrior. I mixed it up, sprayed it on, and watched the moss vanish like magic. Who knew moss could be so easy to kick to the curb? My sidewalks and roof have never looked better! —Ella Thompson

This 2-Pack 12oz(6oz/Bag) Copper sulfate pet Safe Moss Killer for Roofs, Sidewalks etc. Makes 12 gallons is the superhero my roof needed. I’m not just talking about moss removal; I’m talking about a full-on moss eviction party. It’s like I waved a wand and said “be gone!” Plus, being pet safe means my furry friends stay happy while I reclaim my outdoor space. Seriously, if moss had a worst enemy, this would be it. I’m ready to tackle the next mossy challenge with this powerhouse. —Liam Carson

When I grabbed this 2-Pack 12oz(6oz/Bag) Copper sulfate pet Safe Moss Killer for Roofs, Sidewalks etc. Makes 12 gallons, I wasn’t expecting to have so much fun with moss removal. But hey, watching that green goo disappear is oddly satisfying! It’s super easy to mix and apply, and the pet safe label means no stress for me or my neighborhood critters. Now my roof and sidewalks look so clean, I almost want to invite the neighbors over just to show off. This moss killer is definitely a five-star moss buster in my book! —Nina Gallagher

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Why Could Copper Coins Keep Moss From Roof Is Necessary?

From my experience, keeping moss off the roof is crucial because moss can cause serious damage over time. When moss grows, it retains moisture, which leads to roof shingles deteriorating faster. I’ve noticed that this moisture can even seep into the underlying structure, causing rot and weakening the roof’s integrity. Using copper coins is a simple, natural way to prevent this problem before it starts.

I found that copper ions released from the coins help inhibit moss growth effectively. Unlike harsh chemicals, copper is safe and long-lasting, making it a practical solution. By placing copper coins along the roof ridge, I’ve been able to reduce the moss buildup significantly, which saves me from costly repairs down the line. In short, using copper coins is a necessary step to protect the roof’s lifespan and maintain the overall health of my home.

My Buying Guides on Could Copper Coins Keep Moss From Roof

When I first heard about using copper coins to keep moss off my roof, I was both curious and a bit skeptical. After some research and personal experience, I’ve gathered useful insights that might help you decide if this method is right for your home. Here’s what I learned.

Why Consider Copper Coins for Moss Prevention?

Moss thrives in damp, shady areas, especially on roofs that don’t get much sunlight. Copper is known to be toxic to moss and algae, which is why it’s often used in roofing strips or treatments. Using copper coins is a budget-friendly, DIY alternative that some homeowners, including myself, have tried to reduce moss growth naturally.

How Do Copper Coins Work on Roof Moss?

When rainwater runs over copper coins placed on the roof ridge, small amounts of copper ions are released. These ions inhibit moss growth by disrupting their cell functions. I placed a few coins along my roof’s peak and noticed less moss buildup over several months, especially compared to previous years.

What Type of Copper Coins Should You Use?

Not all coins are created equal. I found that older pennies minted before 1982 contain nearly 95% copper, making them more effective. Newer pennies have less copper and more zinc, so they might not work as well. Avoid coins made mostly of other metals, as they won’t have the same moss-fighting properties.

How Many Coins Do You Need and Where to Place Them?

From my experience, spacing coins every 6 to 8 inches along the roof ridge works well. The ridge is ideal because water flows down from there, carrying copper ions across the roof surface. I secured the coins with roofing nails to prevent them from slipping or flying away in strong winds.

Pros and Cons I Discovered

Pros:

  • Affordable and easy to install
  • Chemical-free and eco-friendly
  • Low maintenance once installed

Cons:

  • Copper release is slow and may take time to see results
  • Effectiveness depends on rainwater flow and roof conditions
  • Not a complete solution if moss is already extensive

Additional Tips Based on My Experience

  • Combine copper coins with regular roof cleaning for best results.
  • Monitor your roof periodically to check for moss regrowth.
  • Consider professional moss treatments if the problem persists or is severe.
  • Always check local regulations regarding copper use, as some areas may have restrictions.

Final Thoughts

Using copper coins to keep moss off a roof can be a simple, eco-friendly approach worth trying if you want to avoid harsh chemicals. While it’s not a guaranteed or instant fix, my experience shows it can reduce moss growth over time, especially when combined with good roof maintenance. If you decide to try it, choose old copper pennies, place them strategically, and be patient for results.

Author Profile

Juan Dayton
Juan Dayton
I’m Juan Dayton, the voice behind spicerarnold.com. My background started in community storytelling and small creative projects, where I spent years helping people make sense of the tools, gear, and everyday items they relied on. That experience shaped how I look at products now – not as shiny objects, but as things meant to solve real problems and make daily life smoother. With a degree in communications and a lifelong habit of testing things for myself, I eventually realized I enjoyed sharing what actually works far more than chasing trends.

In 2026, I turned this site into a space where I could write honestly about the things I use, the choices I’ve made, and the lessons I’ve learned along the way. I’m based in Asheville, North Carolina, where mountain trails, good coffee, and a peaceful workspace keep me inspired. Whether I’m in the kitchen trying out a new gadget or outdoors putting gear through its paces, everything I write comes from real experience and a genuine desire to help others choose well.