Composite decking is a water-resistant material. You can build a composite deck in regions with high levels of moisture. Some homeowners even install composite decking close to their swimming pool because of its water-resistant abilities. Since composite decking is water-resistant, can you submerge composite decking in water? 

What is Composite Decking?

Composite decking is a flooring material. You can use composite boards to build a deck in your outdoor space. Composite decking is a good decking material if you compare it to other decking materials. The makers build composite decking with a mixture of wood fibres, recycled plastics and bonding agents. This mixture is heated, allowed to cool and then formed into composite decking. 

Apart from that, composite decking is highly durable and resistant to the elements. It is also resistant to water and moisture. Composite decking can survive in a moist environment. A capped composite decking will not swell or absorb water if you install it in a moist area. The plastic material in the composite decking gives it the ability to resist water. 

Composite decking is better than wood that cannot resist water. Water can penetrate wood easily.  It can also swell and rot over time if you, unlike composite boards that can repel water. Composite board makers usually advertise composite decking as water-resistant. The ability of the composite board to resist water makes it the perfect choice of decking material for most homeowners. If composite decking can resist water, does it also mean that composite decking is also waterproof?

Is Composite Decking Waterproof?

Since composite decking can resist water, most people thought that composite decking is also waterproof. Well, is that so? There is a clear distinction between a water-resistant material and a waterproof material.

A material that is resistant to water can resist water penetration. Such material will resist water penetration to some extent but not entirely. Likewise, composite decking is also resistant to water in that water can not penetrate the decking easily. If you situate a composite deck close to a dock or by the poolside, water will not be able to penetrate the board easily. When compared to a waterproof material, such material will not absorb water when completely immersed in a pool or pond.  

You can now see the differences between the two. Water can not easily penetrate a water-resistant material, but it can still absorb water when completely immersed in water. But for a waterproof material, such material will not absorb water if immersed deeply underwater.

If rain falls on your composite deck, the decking will not absorb water. The gaps between the deck allow water to flow off the deck easily. The plastic material in the composite decking also helps in repelling l water easily. It thereby prevents the composite deck from absorbing rainwater.  You can install a composite board in a moist environment without the board absorbing water from its surroundings.  

Can You Submerged Composite Decking in Water?

Knowing that composite decking is water-resistant and not waterproof, the response to the above question is No. You cannot submerge composite decking in water. Submerged means complete immersion of the composite board in the water. A composite board can only repel water but will absorb water if you place it inside water.

However, no composite decking board can be submerged in water without it absorbing water. Capped composite decking, however, has high water resistance. It can repel rainwater that falls on the decking. When submerged in water, the capped decking will absorb water but in a minimal amount. 

Conclusion

Can you submerge composite decking in water? The response to the question is No. composite decking can repel rainwater that in water? The response to the question is No. composite decking can repel rainwater that falls on it. But when you submerged composite decking in water, it will absorb water. Although the capped composite board has high water resistance, it will still absorb water in a minimal amount if you submerged it in water.