Does Composite Decking Leach Chemicals?

M. John
composite deck garden

Does composite decking leach chemicals? You might have wondered if they do. People who like gardening, especially gardeners, are concerned about chemicals leaching into the soil. The ultradecking composite material is the most superior building material so far due to its properties. Like pressure-treated wood deckings, do composite decking also leach chemicals?

composite deck for gardening

What is Composite Decking Made From?

Decking makers made composite decking from materials that are eco-friendly and free from toxins. Composite decking makers use sawdust or wood fibres and recycled plastic material in making the decking. The recycled plastic material that goes into composite decking can include polypropylene or polyethylene.

Manufacturers use polyethylene in the packaging industry for plastic milk bottles, shampoo and conditioner containers. At the same time, industries also used polypropylene extensively in packaging edibles. It is also used to make plastic parts in the automobile industry because of its ability to resist chemicals.

Both the polypropylene and polyethylene plastics work well when combined with wood fibres to create a strong and composite decking material. The decking makers combined the wood fibre with the plastic material and bonding agent in co-extrusion process. The raw materials are combined and then introduced into an extruder that melts the mixture. The mixture undergoes a heating process in the factory, heated and poured into a moulding material.

The manufacturers moulded the wood fibre and recycled plastic material mixture into shapes and allowed it to cool. In some cases, composite decking manufacturers placed capped composite polypropylene shells around the three sides of the deck. This process protects the decking against stains, everyday foot traffic, and spills. Aside from that, it also contains ultraviolet ray inhibitors that help protect the sun from fading the colour of the decking over time.

Can Composite Decking Leach Chemicals?

The answer to whether composite decking can leach chemicals is No. To begin with, composite decking does not leach chemicals. Besides, composite decking is the best material you can use in building whatever you imagine. Unlike other building materials, they are safe to use. The composite decking is well sealed so that it can not split, crack or warp. They are not pollutants that can harm the soil.

Futhermore, wood-plastic decking do not contain dangerous substances. The composite decking contains wood fibres and recycled plastics. Aside from that, the composition of the composite decking materials is environmentally friendly. If you use composite decking in construction, you can rest assured that you and your pet will remain safe.

Unlike the pressure-treated wood that contains chemicals that can harm you and your pet, composite deckings are chemical-free. Decking makers sealed the composite decking in such a way that it can never crack. It is also a hard building material that can never warp, rot or decay.

The materials decking makers use in building composite decking are suitable for making garden beds. You can also use composite decking in making a raised garden bed for your edible plants. If you use the composite material to build your garden bed, you can be confident that your plants are safe for consumption.

Additionally, wood-plastic deckings are also resistant to moisture. Water can not penetrate through the material like wood decking. Also, wood-plastic material does not contain deadly chemicals; you don’t have to worry about chemicals getting into the soil. Gardeners can also use composite decking as a flower box or planter without the fear of the decking leaching chemicals.

Do Composite Decking Contain Harmful Chemicals?

The answer is no. Composite decking does not contain harmful chemicals. They are superior to other decking materials like lumber decking. It is superior in the sense that they do not contain toxic chemicals, unlike wood decking. Composite deckings are safe for use. It is not made with hazardous substances that are harmful to man and Its environment.


Does composite decking leach chemicals? The answer is no. Composite deckings are well-sealed and would not leach chemicals into the soil. Also, they can not crack, warp, rot or decay, making it the best building material so far.

Tags: Best decking materials, best rated decking, Decking material

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