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How to Get Moss off a Roof

Moss loves damp areas and especially places where there’s some shade. Plants will penetrate the shingles, which can expand and contract in freezing conditions. This can block water drainage and speed up the wear and tear of your roof. Moss development in the roof leads to wood rot issues and roof leaks. Luckily, there's something you can do! 

How to Remove Moss off A Roof

Moss can be removed using reasonably simple methods. If these plant species seriously invade your roof, there are several ways to go about it. Follow these steps to remove moss from your roof effectively. 

Step 1. Brush all moss loose from roof shingles with a hose

To access the roof, carefully place a ladder near the affected area, wear some old clothes, eye protection, and gloves. You can also use a safety rope for total protection. Take your hose and spray the water at a downward angle. Once loose, use a long, soft-bristled brush to scrub off the roof's moss from the top down. Ensure that you rub gently and don’t scrape the roof to avoid tearing down shingles. 

Step 2: Use a cleaning solution: DIY or store-bought

If your moss has developed in the broader area, simply hosing off won’t do the trick, and you may need to apply a commercial cleaning solution. It is best to use them on a cloudy day. They tend to evaporate quickly. Remember to cover areas below the roof as most cleaning solutions have discoloration and corrosive chemicals that may stain your decks or pathways. There are tons of home cleaners in stores and malls, but if you’re tight on a budget, you can make your home-made cleaner. All you need is a spray bottle and a mixture containing one of these four recipes: 

8 oz dish soap + 2 gallons of water
1 pound oxygen bleach + 2 gallons of water 
3½ cup chlorine bleach + 2 gallons of water 
3 cups of white distilled vinegar + 2 gallons of water 

To use any of these DIY recipes, you need to wet down the roof first. Apply the cleanser and leave it for about half an hour. Use a soft-bristle brush to scrub and rinse with water. 

Step 3: Install zinc or copper on the roof to prevent moss growth  

The best precautionary way to avoid moss growth on your roof is using zinc or copper-coated metal just below the top ridge on the roof. While zinc is more affordable, copper is very good at removing moss and algae. As a precautionary measure, you can as well prune any trees nearby that hang above your roof. Ensure that your roof gets enough sunlight, 

Should You Add New Roof Over Moss?

When you want to replace a new roof, it may be tempting to add the new layer over your current shingles. While it saves time and expense, this method may not be as convenient, after all. There are some instances where adding a shingle on top of another is never a good idea. In particular, if your roof has moss, then covering with new shingles won’t do the trick. That’s because you risk so many problems like bumps in the roof, secondary infections, and voidance of your limited warranty. 


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