Jul 28, 2022

How To Clean Your Roof the Easy Way!

A clean roof isn't just about curb appeal – it's crucial for keeping your home in tip-top shape. Over time, moss, dirt, and other nasties can build up, causing damage if left unchecked. That's where Wet & Forget comes in. Our roof cleaning solutions are easy to use and won't harm your roof.

We've got two fantastic options for the Kiwis who love to tackle DIY projects, so you can get your roof looking spick and span in no time. Our bleach-free, non-caustic and non-acidic biodegradable formulas won’t damage your roof in any way but will clear it of moss, mould, algae and lichen.

Remove Moss and Lichen From Your Roof with Wet & Forget Products

Wet & Forget Original Moss, Mould, Lichen & Algae Remover

Concentrated formula works with a garden sprayer, covering between 250 to 300m2
You need a dry day with no chance of rain for at least 4-5 hours afterwards
Mix 1 to 5 in your spray bottle
No harsh chemicals and no scrubbing, simply spray and let Mother Nature do the hard work for you

Rapid Application Moss, Mould, Lichen & Algae Remover

Ready-to-use formula
Again, pick a dry day when it won’t rain for at least 4-5 hours after application
Attach your hose and off you go, no mixing, no scrubbing
Sprays up to 8 metres with the Reach Nozzle

How Much Rapid Application Do I Need To Clean My Roof?

To tackle the roof of the average 3-bedroom house, you’ll need 2 x 2L packs. Bigger roof or like to stock up and save? Choose our larger 4 or 6-pack options.

A Step-By-Step To Apply Our Roof Cleaners

Choose a cool, calm, overcast day for application. This helps the product stay wet on your roof longer for better results.
Ensure the roof surface is dry before applying the cleaner. This allows for maximum penetration into the unwanted growths.
Thoroughly saturate the entire roof area to effectively eliminate all moss, algae, lichen, and fungi.
For heavy lichen, spray the lichen first, wait 15-20 minutes, then saturate the whole roof. This helps break down the lichen's protective layer for better removal.
If your roof has severe growth, re-apply the cleaner after a month.
No need to rinse, let nature do the rest! The dead growth will gradually decompose and wash away with rainfall.
We recommend checking your spouting 3-6 months after spraying as you may have a build-up of lichen that needs to be cleaned.
Re-apply Wet & Forget at the first sign of any regrowth to keep your roof clean and protected.

Important: You can’t use regular Wet & Forget 5L with the 2L Rapid Application Reach Nozzle, it won’t work as the dilution rates are very different.

Coverage of 100-300m2 is the same for both products (depending on porosity and amount of contamination on the surface).

Just A Heads-Up

If there’s a chance of overspray onto your plants or grass, water the garden before the application to create a barrier, then water again after spraying to wash away any product.

Can I Use These Products On Tank Water?

If you’re collecting rainwater from your roof, you can still use our awesome products! Just disconnect your water tank for 3-4 weeks, or until you’ve had a good 36mm of rain. This will make sure all the concentrate and decomposing debris gets washed away before it has a chance to get into your tank.

Why Choose Wet & Forget When Cleaning My Roof?

Steer Clear of Chlorine Bleach Products

While bleach might seem like the go-to for cleaning, it's actually a bit of a no-no when it comes to cleaning your roof. Chlorine bleach can be harsh, stripping away the natural colour of wood shingles and accelerating the wear and tear on metal gutters and spouting. So, for a roof that's clean and healthy, it's best to steer clear of the bleach and opt for one of our products instead.

Safe For Cleaning Most Types of Roof

Whether your roof is clad in steel, clay tiles, cedar or asphalt shingles, corrugated iron, concrete tiles, or even polyethene plastic, Wet & Forget offers a safe and effective solution. Our specially formulated cleaners target these stubborn growths, restoring your roof's pristine condition over time without harming the underlying surface. Say goodbye to the unsightly green and black stains and say hello to a roof that's both beautiful and protected.

While Wet & Forget Outdoor is safe to use on polycarbonate and other transparent roofing materials, you may notice some temporary white streaking while the product works its magic. This is totally normal and won’t damage your roof, but it might not look at its peak for a little while.

How Our Dynamic Duo Helps Maintain Your Roof

In the damp, sun-deprived corners of New Zealand's south-facing roofs, moss, mould, and lichen thrive. These unsightly growths not only detract from your home's appearance but can also cause lasting damage to various roofing materials. Here’s what Wet & Forget Original and Rapid Application were designed to do.

Removes the Moss From Your Roof

Moss thrives in damp, shady spots, making rain-soaked, sun-deprived roofs a perfect breeding ground. Its thick growth and shallow roots trap moisture against your roofing materials, creating a vicious cycle of dampness that fuels further moss growth and accelerates damage. This persistent moisture can lead to wood rot, the erosion of asphalt shingles, and other costly problems.

Clears Your Roof of Green Algae

Just like moss, algae thrives in damp environments. While it doesn't develop roots, it still holds moisture against your roof, creating a perfect breeding ground for other biological growths like moss and lichen. This means algae isn't just an eyesore - it's a potential catalyst for more serious roof problems and a sign that your roof needs some attention.

Gets Rid of Black Fungi From Your Roof

Black fungi, often mistaken for dirt or grime, is a stubborn biological growth that can ruin your roof's appearance. While its removal might be a gradual process, our specially formulated roof cleaners effectively target and eliminate this unsightly fungus. With consistent application, you'll see a noticeable improvement in your roof's cleanliness and overall aesthetic. So, let our products do the hard work for you, and say goodbye to those black stains for good.

Cleans Lichen Off Your Roof

Lichen is a stubborn organic growth that can cling to your roof through thick and thin. Its mild acidity can gradually erode your roof, making it an annoying foe that's difficult to remove with scrubbing alone. However, our specially formulated roof cleaners are up to the challenge, effectively targeting and eliminating lichen, leaving your roof looking its best.