There is a problem with wood deck materials when they are installed outdoors. It will lead to decay in the wood deck. Wood deck problems were solved by creating a new type of deck. Is there a problem with mould in composite decking? It depends on the grade of the deck you purchase. How often homeowners maintain their deck determines if it will get moulded. The article considers mould a problem and looks into conditions that might cause mould growth. 

What is decking mould?

There is a mould. The fungus grows in the form of multicellular filaments called hyphae. Mold may also be thought of as a multicellular, tiny fungus that aids in the decomposition of decaying organic matter in the environment. The moulds float in the air until they find the right spots to grow. There is a spot for your home furniture, your deck or fencing. The organic materials in your furniture and deck will be affected by one mould. The climate and weather can affect mould growth. A dry environment does not support mould growth.

The spores will have a hard time germinating. There is a damp environment that will support mould growth. The moulds will create a dark spot on your fencing. The process of decaying will continue until it has eaten the deck. The problem with mould is more than just discolouring or making dark spots on the fencing. It is possible that mould will cause serious damage and safety issues with your deck. The organic matter in the environment is decomposing because of mould growth. When you find wood or wood products, mould won’t stop until it has finished decomposing. 

Will composite decking get mould?

It depends on the grade of the deck you purchase. Several class actions have been brought against the manufacturers of composite deck materials. The class-action lawsuits were filed in response to the manufacturer’s claims. Dark spots on wood plastic are caused by mould. When wood-plastic is dark, it will discolour the surface texture and destroy the deck. The assurance that their deck won’t grow mould is what homeowners want. 

Is the deck resistant to mould? 

Plastic wood is made of wood dust and plastic. The assurance that plastic wood will defeat most of the wood problems is because it is more robust and better than wood. Mould is not a common problem. Anything organic that comes in contact with it will be attacked by mould. The wooden part of your deck will be destroyed if mould reaches the surface. There is a mixture of timber and plastic. After installing the deck, the timber part is exposed to the elements. When the weather is damp, the wood becomes a hot spot for mould growth.

Once mould enters the crevices of the wood plastic deck, it will cling to the timber part and begin to degrade the deck. This will cause dark spots on the surface of your wood-plastic deck. This will happen to the old-generation wood deck. There is an extra protective shell on the newer-generation wood plastic composite deck. And, there are two types of wood-polymer decking. There is little resistance to mould attack in the first generation deck. The newer generation has a protective shell over the surface, while the old one does not. Plastic is the material of the protective shell. The plastic covers the wood plastic board to prevent it from getting wet. If you maintain it, newer generation composite won’t get moulded. 


Is it possible that composite decking gets mould? It depends on whether you install the newer generation or the old one. A protective shell should hide the wooden part of the deck on the surface.

Read more: How long will the composite decking last?

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