Bamboo decking is rapidly becoming the material of choice for outdoor spaces, and with good reason. Its combination of strength, sustainability, and beauty makes it a standout option. Especially when manufactured using the strand woven process, bamboo delivers exceptional durability, high density, and resistance to mold and weather damage—often outperforming hardwoods like mahogany.
However, to truly maximize the benefits of bamboo decking, proper installation is essential. Even the highest-quality decking boards can underperform or deteriorate prematurely if installed incorrectly. As a factory technologist working closely with bamboo from harvest to final product, I’ve seen first-hand what works—and what can go wrong.
Here are the most common mistakes to avoid when installing bamboo decking, and why understanding the material’s unique qualities is key to long-term success.
Misunderstanding the Nature of Strand Woven Bamboo
One of the most frequent installation issues stems from treating bamboo like traditional wood. While it shares some characteristics, strand woven bamboo is fundamentally different in composition and behavior. During manufacturing, harvested bamboo is shredded into fibers, then compressed under extreme heat and pressure with resin binders. This process creates a product that is incredibly dense—denser than most hardwoods, including mahogany.
Because of this ultra-high density, bamboo decking expands and contracts less than traditional wood, but it still requires proper spacing and installation techniques. Failing to account for this can result in warping, buckling, or gaps appearing over time.
Skipping Acclimatization
Bamboo decking needs time to acclimate to the local environment before installation. This step is often overlooked, especially in fast-paced projects. When strand woven bamboo boards are delivered, they should be stored in the installation area for at least 72 hours to adjust to ambient temperature and humidity.
Skipping this step can lead to problems post-installation, as boards may expand or contract once exposed to outdoor conditions, leading to structural issues or cosmetic flaws.
Installing Without Proper Ventilation
A major advantage of strand woven bamboo is its resistance to mold. Its density greatly reduces moisture absorption, and many boards are treated with anti-mold agents during manufacturing. However, proper airflow beneath the deck is still critical. Poor ventilation traps moisture, creating an environment where mold and mildew can begin to grow—even on treated, high-density bamboo.
Installers should ensure that the substructure allows for at least 150mm of clearance and adequate airflow beneath the boards. Without this, the underside of the decking may stay damp for extended periods, counteracting the bamboo’s natural and treated mold resistance.
Incorrect Fastening Techniques
Strand woven bamboo is exceptionally hard—so hard, in fact, that regular nails or screws may not penetrate the boards without pre-drilling. Some installers attempt to use standard fasteners, which can split the boards or cause them to loosen over time.
To avoid this, always use stainless steel screws or fastening systems designed specifically for dense composite materials. Hidden clip systems are also recommended for a cleaner finish and to allow for natural movement of the boards without stress points.
Ignoring Expansion Gaps
Another common mistake is failing to leave adequate spacing between boards. While strand woven bamboo is dimensionally stable, it still reacts to temperature and humidity changes. Boards should be spaced with at least 5–6mm gaps between them, and end joints should have a minimum of 3mm spacing.
Neglecting expansion gaps can cause the decking to swell and push against adjacent boards, leading to buckling or damage over time. This compromises not only the appearance but also the structural integrity of the deck.
Using the Wrong Substructure Material
Bamboo decking performs best when supported by a stable, weather-resistant substructure. Installing it on untreated timber joists or softwood can reduce the lifespan of the entire system. Moisture in the substructure can wick into the decking boards, increasing the risk of mold growth or warping.
To match the durability and 15-year warranty of strand woven bamboo decking, use treated hardwood, recycled plastic, or galvanized steel substructures that resist rot and corrosion.
Neglecting Regular Maintenance
Despite its high density, weather resistance, and factory-applied anti-mold treatments, bamboo decking still benefits from basic maintenance. Some users install their deck and then forget about it, assuming it will stay pristine for 15 years without attention.
While bamboo requires less upkeep than many hardwoods, regular cleaning to remove debris, leaves, and dirt is essential. An annual wash with a mild detergent and soft brush is typically sufficient. For decks in shaded or humid areas, periodic application of a UV-protective sealant can help preserve color and surface integrity.
Overlooking Manufacturer Instructions
Each bamboo decking product can have slightly different specifications depending on the producer’s manufacturing techniques, treatments, and coatings. Some boards are pre-oiled, some are raw, and others are finished with UV-protective layers. Ignoring the specific instructions that come with your product can lead to poor adhesion of sealants, mismatched finishes, or even voided warranties.
Always read and follow the installation and maintenance guidelines provided by your supplier. These are created based on rigorous factory testing and are key to ensuring your deck performs at its best for years to come.
Building a Deck That Lasts
Bamboo decking, particularly when manufactured using the strand woven process, is engineered to provide exceptional performance. It boasts higher density than many hardwoods, better resistance to mold than mahogany, and the ability to withstand harsh weather conditions—all backed by a 15-year structural warranty.
To fully benefit from these qualities, proper installation is critical. Avoiding the common mistakes listed above ensures that your deck won’t just look beautiful on day one, but will maintain its strength, safety, and appearance for many years.
Whether you're a professional builder or a homeowner tackling your first deck project, understanding the unique properties of bamboo and respecting its installation requirements is the foundation of a truly long-lasting outdoor space.