Best Outdoor Fence Wood: Why Black Locust Lumber Is the Ultimate Long-Lasting Choice
When selecting the best wood for your outdoor fence, longevity, resistance to weather, and cost are the most important factors. Both consumers and contractors are always looking for a wood that won't require frequent maintenance. That's where the superior black locust lumber shines.
In this guide, we’ll explore why Black Locust is considered one of the best outdoor fence woods and how combining smart building techniques—like a siding rain screen—can further extend the life of your structure.
Why Outdoor Fence Wood Quality Is Important
Fences are constantly exposed to moisture, humidity, UV light, insects and temperature extremes. Cheap wood may begin to rot, warp or crack after just a few years. That's why opting for a naturally rot-resistant wood species is crucial.
But many homeowners don't prioritise moisture control. As with walls, using a siding rain screen system with fences will better allow moisture to escape and dry, thus extending their lifespan.
Why Black Locust Lumber is Ideal
Black locust lumber is one of North America's hardest hardwoods. Here are a few reasons why it is perfect for fencing:
1. Exceptional Natural Durability
Black Locust is naturally rot-resistant, decay-resistant and insect-resistant. It doesn't need to be treated with chemicals to withstand exposure. It's sustainable and durable.
2. Long Lifespan
Black locust lumber can last 30-50 years or longer, even without treatment. Combined with installation techniques such as spacing and air flow (like a siding rain screen), it can last even longer.
3. High Strength and Density
This timber is super-dense and strong and stands up to denting, wear, and weathering. It’s ideal for harsh climates.
4. Low Maintenance
Black locust is low maintenance, unlike other softer woods that need regular staining. Good installation, including some ideas from a siding rain screen, can minimise maintenance further.
Using a Siding Rain Screen for Fences
You may be asking yourself, how does a siding rain screen apply to fences?
A siding rain screen is typically employed in the construction of buildings, where a gap is provided between the siding and the wall. This helps air and water to drain away.
This approach can be adapted to fencing to do the following:
Keep water out of the spaces between boards.
Improve airflow
Reduce mould and rot.
Extend the life of the wood.
When you build a fence with some space between the boards or allow for ventilation, you're actually creating a fence rain screen.
How to Create a Longer-Lasting Fence with Black Locust Wood
Here are some tips to make the most of your fence:
1. Allow Proper Spacing
Don't nail boards too close together. This helps create a siding rainscreen and promotes drainage.
2. Rise Above the Soil
While Black Locust is resistant to rot, it will last longer if not in direct contact with the ground.
3. Use Quality Fasteners
Opt for stainless steel or galvanised fasteners to avoid staining and damage.
4. Design for Drainage
Make sure your fence is not a water collection point. Sloping tops or spacing can prevent water accumulation.
Black Locust vs Other Fencing Woods
How does Black Locust stack up?
Cedar: Rot-resistant but weaker and less long-lasting
Pine (Treated): Cheap but needs to be chemically treated and regularly maintained
Redwood: attractive but more costly and not as dense as black locust.
Combined with airflow techniques like rain screen siding, black locust is one of the most durable and sustainable options.
Black Locust Lumber is Good for the Environment
Another key benefit of black locust lumber is its sustainability. It is a hardwood that grows faster than other species and doesn't need chemical treatment. This makes it environmentally and pet- and child-friendly.
Wood siding and other natural materials and careful design choices (such as a siding rain screen) can go a long way to minimising the environmental footprint over time.
Is Black Locust Worth It?
Black locust lumber may be more expensive upfront than other materials, but the long lifespan and minimal maintenance make it well worth it in the long run.
And with fewer repairs, replacements and treatments and the enhanced strength that comes from moisture management (such as a siding rain screen), the benefits are obvious.
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