How Do You Clean Moss Off Shingles?

How To Deal With Green Moss on Roof Shingles?

Moss growth tin create several problems on shingle roofs. While a minor layer of thin moss isn't too troublesome, large clumps of moss tin degrade shingles, get beneath them and create opportunities for leaks. Further, many of the methods of removing moss that are recommended online actually damage the shingles, which could significantly increase your odds of getting a leak. So, how do you safely remove moss from a roof? If y'all plan on replacing the roof, do you need to remove the moss first? And how do you prevent moss from growing back after you have removed information technology? We'll reply those questions and tell you other things that you lot demand to know about how to handle the moss on your shingle roof.

Roof shingles with moss growth

Tabular array of Contents

Why is Moss Bad for Shingles?
What if the Moss Appears Dead?
How To Remove Moss From a Roof
Methods You Shouldn't Utilize To Remove Moss From a Roof
Why Shouldn't I Add a New Roof Over Moss?
Should You Remove Moss-Covered Shingles Before You Install a New Roof?
The Benefits of Removing Moss-Covered Shingles Before a New Roof Installation
How To Prevent Moss on Your New Roof
What if the Moss Grows Back?
What if I Like the Moss?
Do Y'all Need Help Dealing With Moss?

Why is Moss Bad for Shingles?

Y'all may feel that a bit of moss gives your roof some charm, just as ivy growing up the side of your business firm might. While moss may be beautiful, it is a detriment to your roof. Hither'south why:

Most plants gather water from their roots, merely mosses assemble water from their leaves. Therefore, they practice non mind that shingles, dissimilar soil, are a dry out and relatively nutrient-complimentary environment. They will grow roots directly into the shingles, which can destroy the shingles and create the opportunity for leaks.

When it rains, moss will soak up water and retain it, creating consistently wet conditions on your roof. Moss growth will also interfere with proper drainage of water off the roof as water needs to trickle through or around the moss instead of running straight downward to the gutters. The resulting constant exposure to water can degrade shingles.

Over fourth dimension, moss can as well work its way under shingles, lifting them up. This uplift creates opportunities for water to penetrate lower layers of the roof and, potentially, your home.

While minor moss infections may not cause many bug, it is probable to get severe over fourth dimension. Once you spot moss growth on your roof, yous should take steps to resolve it. If you lot have a severe infection, you may have no selection but to remove the shingles that accept been damaged by it. A professional roofer tin assistance you assess what kind of intervention your roof needs.

What if the Moss Appears Dead?

If the conditions has been consistently dry out, moss may appear to exist dead. However, some species of moss can stay alive when dried out for months. All it will take is one rain for it to recover and continue growing. If your moss has dried out, take the opportunity to accept a roofer remove the moss from the roof.

Moss growing on roof

How To Remove Moss From a Roof

If your roof has sprouted a moss infection, you can remove it before it becomes serious enough to bear upon the functioning of your roof. Moss is tough and typically y'all will not exist able to remove it by hand. Withal, y'all can use a chemic solution to loosen the moss without dissentious the shingles. We don't recommend that you step on the roof for moss removal.

Materials You'll Need

A garbage bag.
A garden hose.
A ladder (familiarize yourself with ladder rubber before you start).
A moss-specific cleaner that does not apply bleach and is rated by the EPA.
Or your own cleaner mix of mild bleach or mild detergent mixed with water in a spray bottle. Y'all may mix 2 cups of chlorine bleach with ii gallons of h2o. Or you tin use 8 ounces of dish lather with 2 gallons of water.

How To Remove Moss From a Roof

Stride 1: Safely set up your ladder near the moss. With either your homemade cleaner or a store-bought option, spray the moss.
Step Two: Follow the store-bought cleaner's instructions for how long you should leave the cleaner on the moss. If using a bootleg spray, leave it on for fifteen-xx minutes.
Footstep 3: Using your garden hose on low pressure, rinse the moss thoroughly. You should find that nearly of the moss volition come off from the spray of the h2o. Be sure not to straight a pressurized spray beneath the shingles or directly against the shingles such that they might lift upwards. Otherwise, y'all could create a leak. Even if the moss is non coming off, rinse thoroughly. Information technology is very important to remove all of the cleaner that you sprayed on, or yous could damage your shingles.
Step Four: Whatsoever remaining moss should now exist loosened enough that you tin can manually remove it from the shingles. While standing on the ladder, gently lift the moss off the shingles and identify it in your garbage bag for disposal. You can secure the garbage bag to your ladder and so that you lot can always have one hand on the ladder.
Pace V: If some moss is nevertheless too ingrained on the roof to be removed by paw, you should not resort to other methods, such as using a brush or a pressure washer, equally they may damage the roof. Instead, consult with a professional roofer as to what your next steps should be.

Methods You Shouldn't Use To Remove Moss From a Roof

Unfortunately, there is a lot of bad advice out in that location virtually how to remove moss. While these methods may be effective at removing moss, they may besides impairment shingles in the procedure. We don't recommend you endeavour to remove your moss past:

Scrubbing: You may be tempted to scrub the moss off the shingles because moss grips shingles quite strongly. Yet, scrubbing is probable to damage the asphalt shingles and remove their granules.
Pressure washing: Pressure washers tin be very strong and certainly strong enough to intermission a shingle'south adhesive and lift it upwardly. They also can strip asphalt shingles of their granule surface, which can ruin their performance and destroy their colour. Any amount of pressure washing can crusade serious problems with the roof, including major leaks. Never use a pressure washer or a pressurized stream of water on your roof.
Using harsh chemicals: Loftier concentrations of bleach and other chemicals may do permanent harm to the shingles, increasing your risk for leaks.

Using whatever of these methods may also void your limited warranty on the roof. If you're in doubt about the safe or effectiveness of a moss removal method you want to endeavor, consult with a professional roofer. A handful of roofers in areas where moss infections are mutual practise specialize in removing moss. They may be able to do the work for you and, if not, may have recommendations near what your specific roof tin benefit from.

Why Shouldn't I Add a New Roof Over Moss?

When you demand a new roof, it may be tempting to add together a second layer of shingles over your existing shingles. Doubling upward your shingles tin save fourth dimension and expense on your roof replacement as your roofer doesn't need to remove and dispose of the sometime shingles. This strategy is convenient for homeowners considering the replacement won't take as long or make as much of a mess. However, there are some circumstances where merely adding a new layer of shingles isn't a expert thought.

For example, when you accept significant moss growth on your roof, simply roofing it upwardly with new shingles isn't wise. Several potential bug may occur if your roofer simply adds a new roof over your existing, moss-covered roof. These potential issues include:

Unknown roof status: If moss growth is severe, it may accept compromised the quality of your existing decking and underlayment. The simply way to know for sure is to remove the shingles and wait at these other layers. If your roofer doesn't do this, they may be compromising the quality of your new roof. Damaged underlayment and decking can interfere with the proper role of your new shingles. Moss won't die immediately and may continue to erode the decking, which increases the risk of a roof plummet.
Bumps in the roof: The combination of damaged and swollen decking forth with moss growth can make for a new roof installation that is anything merely smooth. Bumps and dips in the roof surface tin interfere with the proper drainage of h2o off the roof and foreclose the shingles from sealing properly. This uneven surface may also reduce your curb entreatment.
Unsafe conditions for roofers: Your roofers will demand to walk on your old roof to install a new ane above it, and moss makes for very unstable ground. It is liable to slip beneath their feet and could cause a fall. While roofers will wear a personal fall arrest system (PFAS) for safety, increasing their likelihood of a autumn is not wise.
Secondary infections: When moss is cut off from sunlight, it will eventually die. Withal, the dead moss volition yet be on your roof, where information technology may serve every bit a valuable source of h2o and nutrients for mold and fungi, which can grow in darkness. If you exit mold in place beneath your new roof, you risk secondary infections that tin can spread into your attic and harm your habitation. Rot and mold can impairment your structural woods, harm your drywall and make your air quality worse.
Voidance of your limited warranty: As information technology tin cause all of the harm listed above, adding shingles over a moss-covered roof may besides void your limited warranty on the new roof.

Should You Remove Moss-Covered Shingles Earlier You Install a New Roof?

When yous get a roof replacement, you may want to have your roofers install the new roof over summit of the old. In certain circumstances, this can help you save money. Withal, if your one-time roof has moss growth, tin you yet use this method?

Y'all may need to deal with the moss before the full roof replacement. Your roofers volition need to remove all the shingles on your old roof, or they may demand to remove the largest chunks of moss with a pressure washer and then apply the new roof. Information technology is only advisable to use a pressure level washer because you no longer need to worry about the condition of the old roof. The new one will offer the protection your home needs.

The Benefits of Removing Moss-Covered Shingles Earlier a New Roof Installation

While you may not necessarily have to remove the moss-covered shingles earlier a new roof installation, you should consider information technology. In that location are many benefits of removing the moss-covered shingles, including:

Reduce long-term costs: By removing the old roof, yous go along the opportunity to double-up roof layers during your next roof replacement. The maximum layers of shingles allowed to exist on the roof, co-ordinate to most building codes, are two. And then, once you utilise this strategy, y'all must tear off both roof surfaces during your next roof replacement.
Maintain abode value: Are you planning on selling your abode soon? A properly replaced roof is more probable to entreatment to potential buyers, while a poorly replaced roof may negatively touch your home value.
Avoid the take a chance of impairment: You can avoid all of the risks listed before in this commodity by simply removing all of the moss-covered shingles.

Roofer using roof stripping shovel to remove shingles with moss

How To Prevent Moss on Your New Roof

Now that yous have a brand-new roof, you'll want to take steps to protect it from getting a moss infection as the last ane did. Hither are a few means to prevent moss growth on your roof:

Remove sources of shade: Moss prefers to grow in the shade, so exposing more of your roof to sunlight will assistance deter it. You should consider trimming copse that shade out the roof or moving garden features, similar pergolas or trellises, and so that they practice not cast shade on the roof.
Choose algae-resistant shingles: Where in that location'due south moss, there is also algae (Gloeocapsa magma), as they thrive on the same wet and shady conditions. You lot tin can avert an algae infestation by installing algae-resistant shingles, such equally IKO's Nordic™ shingles. Though algae-resistant shingles will not preclude moss, they will assistance y'all avoid pesky algae.
Install a metal strip: A copper, zinc or a galvanized metallic strip installed on the ridge of the roof can forbid the growth of moss, algae and lichen. The strip volition oxidize over time and launder downwards the roof plane when information technology rains, making the roof aeroplane much less habitable for moss, algae and lichen. This is likewise why y'all might see a gap in the algae or moss growth directly beneath your existing flashing or next to an aluminum-sided dormer. However, it is important to note that calculation a copper strip will take time to start inhibiting moss. You shouldn't expect it to handle a electric current moss infestation by itself, only to forbid a new one.
Get regular inspections: Roofers can often prevent moss growth by ensuring that your roof is draining water properly. They should inspect and clean your gutters at least yearly to avoid the backup h2o that could attract moss.

Roof gutters with leaves

What if the Moss Grows Back?

If the moss does render, do not rely on harsh chemical treatments or dry spells to kill it. Chemic treatments may damage shingles as well equally moss, creating a more significant problem. Expressionless moss must still be removed by mitt, or it volition impede the menstruation of water off the roof and create issues. Information technology may crusade standing water. It may also clog gutters or let for leaks.

What if I Like the Moss?

Some homeowners discover moss enchanting, like ivy growing upward the side of their home. If you'd like to grow moss or other plants on your roof, you could consider investing in a residential light-green roof. Thin, extensive green roofs are plenty to grow succulents and mosses. If you lot're interested in taller plants, consider an intensive light-green roof.

Do You Need Help Dealing With Moss?

Whether you lot demand to remove a few moss-infected shingles or replace the whole roof, a professional roofer is your all-time resource. Attain out to one through IKO's Contractor Locator.