Is Composite Decking Water-resistant?
Decks outside have to be able to handle rain, snow, and heat. Water-resistance is a very important thing to think about when choosing deck materials. Decks made of traditional wood are easily damaged by water, which causes them to bend, crack, and rot. When it comes to this, composite decks work much better. Even though composite decking isn’t fully waterproof, it’s much more resistant to water than wooden decks.
Generally, composite wood decking can withstand moisture exposure. However, prolonged exposure to water or extreme weather conditions can still affect it. This article will explain the waterproofing principles, advantages, and considerations of composite decking boards. You will gain a better understanding of this material’s water resistance.
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Table of Contents
Waterproof Performance of Composite Decking
To start, let’s be clear: composite decks are very resistant to water. It is not completely waterproof, though. Nearly perfect protection can only be achieved with fully synthetic materials like plastic. The advantage of composite wood decking lies in its moisture and corrosion resistance. It can handle daily splashes of rain and temporary pools of water while absorbing water much more slowly.
Because of these features, it will stay stable in most outdoor settings. Even so, moisture can still get in and cause damage in very damp situations or for long periods of time.
Why is Composite Decking Waterproof?
Composite decking is waterproof because of the materials it is made of and the way it is made. Wood fibers and recycled plastic make up most of it. It does not absorb water, effectively reducing contact between the wood fibers and external moisture.
Especially for capped composite decking, an additional polymer protective layer coats the surface. This significantly enhances the waterproofing capability compared to traditional wood decking. Therefore, capped composite decking is a superior choice for humid, rainy regions.
Under What Conditions Does Composite Decking Lose Its Waterproofing?
Composite deck materials are not completely waterproof. The following situations may cause waterproofing failure and require special attention:
- Prolonged Immersion: Composite deck boards can handle wet and rainy places. But if it stays buried in water for a long time, the wood fibers inside will slowly soak up the water. Eventually, the boards may grow, become softer, and lose some of their strength.
- Exposed Cut Edges: Cutting boards during installation expose the core material. These cut surfaces become vulnerable entry points for moisture. The core material of composite decking is inherently water-resistant. However, prolonged exposure to moisture still poses a risk of damage.
- Scratches and Damage: Deep scratches or other damage can weaken the protective layer on the top, letting water in.
- Installation Errors: During installation, ensure adequate drainage slope or spacing between panels. Otherwise, standing water on the deck surface may not drain away promptly. Moisture can seep through gaps, causing structural damage.
How to Ensure Composite Decking’s Waterproof Performance?
Although composite decking offers excellent waterproof properties, remain mindful of the following factors. Each can impact the decking’s actual waterproofing performance.
Composite Deck Brands and Models
Within budget constraints, always select reputable brands. Different composite deck brands may offer varying warranty periods and terms for waterproofing. For specialized applications like pools or docks, consult the manufacturer. For example, EVODEK offers capped composite decking with superior waterproofing performance.
Installation Quality
Proper installation ensures waterproof performance. Set up proper drainage slopes while the work is going on. Make sure that the framing of the deck has a small slope to keep water away from the building.
Additionally, gaps between panels should be maintained according to the manufacturer’s recommendations. This allows the panels to expand and contract with temperature changes and facilitates rapid drainage. Specialized hidden fastening methods are often used for composite deck boards. This keeps the board surface from having too many holes in it.
Regular Cleaning and Inspection
Composite decking doesn’t absorb water by itself, but you should quickly remove any leaves or water that is sitting on it. This keeps the surface from being slippery and saves the deck framing below.
Clean the surface often to keep it looking good and make it less likely to slip. In addition, do a full check of the deck once a year. Look for deep scratches, loose boards, or problems with draining, and fix any issues right away.
Conclusion
Even though composite decking isn’t fully waterproof, it’s much better at keeping water out than wood. It’s the best option for places outside that usually get wet. It does not need much upkeep and provides long-lasting safety and good looks.
The waterproofing performance of composite decks requires professional installation and regular cleaning and maintenance. You can use it to create an outdoor space that stands up to wind and rain. For more information about composite decking, feel free to contact EVODEK. We look forward to answering your questions.
FAQ
Will Composite Decking Develop Mold After Prolonged Water Accumulation?
This varies depending on the type of composite wood decking and the structure underneath. The top of capped composite decking is dense. Because moisture and oxygen have a hard time getting through, mold is not likely to grow on the boards themselves. The top of uncapped composite decking is pretty porous. Surface mold may show up in places that stay damp for a long time, but usually not as much as on wood.
So, check the deck drains often to keep water from building up for a long time. Mold can grow on the deck’s base structure or on organic matter that has gathered in damp places. The most important thing to do to stop mold growing is to make sure there is good drainage.
Does Composite Decking Become Slippery When Wet?
Most composite wood decking surfaces are very good at keeping people from slipping. But in places that stay damp for a long time, algae and dirt growth may make the surface slippery. Specialized cleaners for composite decks can get rid of algae and dirt, making the surface smooth again.
The most important thing is to keep the deck dry and well-ventilated, and you should sweep away leaves every so often. This prevents the buildup of organic matter.
Should Cut Edges of Composite Decking be Sealed During Installation?
Sealing is a good idea, especially in places that get a lot of rain or water. Cut edges leave the core material open, which could allow moisture to get in. Long-term contact with still water can lead to seepage and edge swelling. Use a special edge sealer for composite deck boards on cut surfaces. This adds an extra layer of protection, making your deck last longer.
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