Removing Mold off Wooden Decking

iVillage Member
Registered: 04-19-2013
Removing Mold off Wooden Decking
Sat, 04-27-2013 - 3:31am

The lovely homes with wooden decking and pergolas in and around Canberra often have to deal with mold formation due to damp and cold weather conditions. As a proud owner of wooden decking and pergolas, it can be quite frustrating when nature attacks and eats away your investment into luxurious decking.


Mold is algae – a living organism that looks green in color due to photosynthesis. Algae can not only ruin the expensive composite wood decking in your Canberra home, it can also be potentially dangerous because a deck that is covered with mold will be very slippery.

Removing mold from your outdoor wooden decking or pergolas

Although mold is a pretty common occurrence on most wooden decks in Canberra homes, there is no permanent solution to it – at least not yet.

Step 1 – Cleaning the wooden Canberra deck

To remove mold formation from your wooden decking, you need to first clear your deck of all furniture including flower pots and other decorative fixtures.

Step 2 – Scrubbing the mold off your wooden deck and pergola

Use a hard broom to sweep your wooden decking clear of any dirty and mud particles. Then you need to get down on your hands and knees and use a stiff brush over the entire Canberra decking plans. Give special attention to corners and underside of the skirting as this is where mold and algae have a good grip.

Step 3 – Chemical application

If you are satisfied that your decking and pergola is clear of mold buy an algae removing chemical from your local decking supplier. You need to do this because despite the scrubbing, microscopic colonies of algae will still exist and unless you clear them out with a strong anti-algae product, it will once again take hold over your entire wooden decking.

Step 4 – Buying the right chemical or product

Anti-algae products are available in two options – regular (factory made chemical), and environmentally friendly (usually produced from natural sources). Whichever product you select, read the instruction carefully as most anti-algae products come in concentrated form and need to be diluted before application.

If you are in doubt, seek the advice of your local decking contractor of which, there are many available in Canberra. Most would be happy to come over and look at your decking before advising you on a choice of anti-algae product.

Step 5 – Application

Brush or lightly spray the chemical so it covers the entire wooden decking. You will usually need to leave the decking alone for a couple of days so as to allow sufficient time for the chemical or anti-algae product to do its job. Follow instructions mentioned on the product package.
Some owners of Canberra homes remove mold the old fashioned way – using bleach in a water solution. While this is a low-tech, low expense approach, it has the potential of causing some damage to your expensive wooden decking.

Preventing reoccurrence of mold on your hardwood timber decking

While there is no foolproof way of preventing reoccurrence of mold on your expensive wooden decking, you might want to install a few hard coir mats at the entrance to your decking. Family members or guests should wipe their shoes on the mats – this is especially important in the monsoon. Wet dirt carried by shoes will quickly bring back algae and mold formation on your decks.

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At Turnkey Decks we are committed to providing both building excellence and value for money for our customers. That’s why at Turnkey Decks we don’t build great value decks or build excellent decks, we only build excellent decks for great value.