30 Sep Garapa Deck Cleaning: Remove Green Stains Safely
Wanting to increase the longevity and visual charm of your Garapa decking? Garapa hardwood characteristics, such as its density, strength, and resistance to decay and rot, make it a preferred option for outdoor decking. However, it’s essential to know that Garapa can gradually become exposed to green stains caused by the formation of moss or mildew, which grows effectively in moist and low-light spaces. Even though this hardwood can handle green stains, it will become less appealing over time.
Wondering how you can remove green stains safely from your deck? Discover the causes, tips, and practical steps of treating green stains without damaging your Garapa deck.
Causes of Green Stains on Garapa Decks
- Moisture Holding: Your deck can constantly be exposed to outdoor conditions, such as dew and rain. These conditions can trap moisture underneath Garapa deck boards, which will create a humid environment that will develop fungal growth, lead to green stains, and cause the deck surface to slip.
- Shade: If a Garapa deck is not exposed to sunlight, it will take a long time for the moisture to dry, especially under the boards and where the furniture is placed. Hence, this may weaken your deck and increase the risk of green stains, swelling, or warping.
- Weather Conditions: Regular rain may cause long-lasting wetness on the deck surface and promote green stains. Consider winter vs. summer care for your deck.
- Debris Buildup: Accumulation of leaves and dirt can speed up the staining process that is produced by algae and moss on your deck surface.

Practical Guide to Remove Green Stains Safely
Remove Loose Debris and Dirt
Wanting to keep your deck clean? Take a broom and start sweeping debris, dirt, and removing dust that has built up over time from your Garapa deck’s surface. Also, check out leaves that might be trapped under and between the boards to prevent them from building up moisture that may result in green stains. Remember, use a soft broom to avoid scratching the deck surface.
Prepare a Mild Cleaning Solution
After sweeping debris, it’s essential to frequently use Loba Deck Degrayer, water, and a mop or cloth to wash the deck’s surface and remove mildew stains, green growth, and loose dirt without affecting Garapa’s aesthetic appeal of a golden-yellow colour. Don’t use harsh chemicals when cleaning your deck! Knowing how to clean your garapa deck will make a big difference in how it holds up over time.
Gently Scrub the Stained Areas
You must gently scrub the green stains on the Garapa deck with a soft-bristle brush. However, if the stains are stubborn, apply a bit more pressure and take your time to make sure they are completely removed. Although Garapa is a dense timber, avoid overdoing the scrubbing because it may scratch the deck.
Rinse Carefully with Water
After scrubbing the green stains, use the garden hose to rinse the deck with clean water to wash off all the dirt or soap residue without damaging the Garapa. It’s essential to refrain from using high-pressure washers that might break down the hardwood fibres and affect your deck surface integrity.
Let the Deck Dry Completely
Leave your deck to dry properly before you start applying any sealant treatment. Curious why? Because if the deck is not fully dry, moisture trapped in Garapa will cause fungal growth, which will bring back the stains. Touch the deck surface with your hand to feel if there’s still dampness. If not, apply our Loba Decking Oil Transparent to prevent algae growth, nourish, and enhance your deck’s elegant and inviting appearance.
Tips to Protect Your Deck from Future Green Stains
- Schedule a regular maintenance routine and inspect your Garapa deck more often so you can catch any green stains or mildew growth early.
- Install proper drainage and ventilation under your deck to stop water from accumulating between boards and help Garapa dry quickly.
Understanding and knowing how to safely handle green stains on your deck will help maintain Garapa’s durability and its visual appeal effortlessly. We offers a range of decking materials and cleaning products that will leave your deck spotless. CONTACT US for any hardwood enquiries.