3 Methods on how to Remove Lichen From Colorbond Roof

Steel Colorbond roofs are the next greatest invention after the wheel. It’s longlasting, lightweight, and looks great. Since the colour is bonded to the steel, it saves you bucks from painting.


But over time, the roof will get worn out. You may find green unwanted guests popping up. Fret not!

how to Remove Lichen From Colorbond Roof

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This post will show you how to remove lichen from Colorbond roof. With 3 easy methods to choose from, you’re bound to find your solution. Let’s dive in.


Why Does Lichen Grow?

how to Remove Lichen From Colorbond Roof

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Now, what actually is the reason behind fungus and lichen growing on your roof? In short, it’s because of the environment you live in. Lichen likes warmth and moisture.


Even though your roof is meant to block water from your home, with time it becomes an ideal breeding ground for moss and lichen. This may be due to improper drainage from your roof.


For instance, if you haven’t cleaned your roof in a while, fallen leaves and twigs retain moisture and can be the main culprit behind this. Likewise, if your roof wasn’t installed by an experienced person, it could also be the reason.


To rule out the possibility of lichen growing on your roof, do regular cleanups of your roof. If the problem is super bad, consider hiring a professional to get your drainage checked.


All in all, you must get rid of moss and lichen asap, or else you could face potential health problems.


3 Methods to Remove Lichen from Colourbond Roof

There are many routes you can take when it comes to removing lichen from your roof. You could opt for chemical cleansers which will get the job done in a jiffy.


Or you could also try more mild and natural options such as a power washer, v or good old soap water. The options are endless. Let’s take a look at them one by one.

Method 1: Detergent and Bleach

A cheap and effective remedy to get rid of lichen is by using detergent and bleach. Simply mix 3/4th cups of bleach in one gallon of water. Spray this on all places where you see lichen grow.


Keep this mixture for 15 minutes and then remove all the leaves and wash the roof with plain water. Next, take a bucket of water and add half a cup detergent to it.


Take a sponge and scrub the roof well, focusing on the parts where lichen grew. After you’ve thoroughly scrubbed and washed the roof, the lichen should be long gone.

Method 2: Using plain water

how to Remove Lichen From Colorbond Roof

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If you have a hose at home, sometimes that’s all you need to maintain and clean your roof. Simply wash away any growing lichen that you see with water. This is an easy method but it may not work every time.


If the overgrowth on your roof is to a great extent, then plain water won’t cut it. Moreover, steer clear from pressure washers even if it seems easier. This is because pressure washers may damage your Colorbond roof.


Many times, using a pressure washer may even forfeit your warranty with your company. So consult with your company before you choose to take this route.

Method 3: Use Chemical Cleanser


how to Remove Lichen From Colorbond Roof

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You can head out and get your hands on cleaners which are specially formulated to get rid of lichen from your Colorbond roof. These cleaners will remove the moss and lichen easily, without damaging your roof at all.


There are many brands you can choose from. Look out for alkyl dimethyl benzyl ammonium chloride or octyl decyl dimethyl ammonium chloride as the active ingredient in the products.


Simply follow the instructions written on the packaging of the brand you choose and use a sprayer to spray on the lichen.


Just complete this procedure twice and watch the lichen slowly die away. Many brands even promise the lichen not coming back for 2 to 5 years!

Things to Avoid

Any method you use to remove lichen from your roof, shouldn’t be harsh or have a chance of damaging your roof at all! Many times, you may see people using abrasive cleaning methods such as sanding or power washing.


These are a big no when it comes to cleaning your Colorbond roof since it’ll cause huge damage to the material. To make your life easier, we’ve accumulated a few methods that you should always steer clear of. Read on to find out.

Wire Pads or Brushes

Although they may be fine to use on regular roofs, you’ll risk scrubbing away the surface of the roof by using wire brushes. This cleaning method is super abrasive and should never be used on your Colorbond roof.

Paint removers or Paint Thinners

In case you’ve painted your roof before, never use a commercial paint remover to get rid of it.


These solutions don’t sit too well with Colourbond roofs and again, can significantly reduce the life of your roof. Moreover, you risk losing your warranty.

Power Washers

We’ve said it once and we’ll say it again. Steer clear from power washers no matter how clean they make your roof. This will damage your roof structure and make all your efforts go down the drain.


Last but not the least, steer clear from sandpaper. The reason? Same as not using a wire pad. Sandpaper is too abrasive  Such cleaning methods may get rid of loose dirt, but you’ll have to also compromise your roof life.


That’s all about the things you have to avoid. In short, use any method after consulting with your local company if it’s advisable.

Call us direct at Earles Paints on 07 4121 5202 for all the information you need and visit us : Earle Paint Place Maryborough.

Bottom Line

Moss and lichen not only make your roof look unkempt but it also significantly reduces the life of your roof. Moreover, they could be toxic to you and your pets.


But with these easy solutions, worrying about them should be a thing of the past. We hope this post gave you a clear idea of how to remove lichen from Colorbond roof.


Have you tried doing this before? If there’s anything we missed, do let us know in the comments below. We’d love to hear from you.




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