Massaranduba wood decking is a popular choice for outdoor decks because of its exceptional hardness, natural durability, and rich reddish-brown color. Also known as Brazilian Redwood, Massaranduba is a dense tropical hardwood that performs well in demanding outdoor environments.
With a Janka hardness of about 3,190 lbf and a density of around 1,000 kg/m³, Massaranduba is one of the harder and heavier decking woods available. It is also rated as very durable and has good resistance to many insects.
However, its high density is both an advantage and a challenge. Massaranduba can be difficult to cut, drill, and fasten, and properly dried decking is important because the wood can experience significant movement during moisture changes.
Why Use Massaranduba for Decking?
Massaranduba is well suited to decking because outdoor decks need to withstand:
- Rain and moisture
- Sun exposure
- Foot traffic
- Scratches and impacts
- Seasonal temperature changes
- Insects and decay
Its high density and natural durability allow it to perform well under these conditions. Technical decking data classifies Massaranduba as very durable and reports a Janka hardness of approximately 3,190 lbf.
Massaranduba Decking Pros and Cons
| Pros | Cons |
|---|---|
| Very hard and durable | Difficult to cut and drill |
| Good resistance to decay | Heavy |
| Good insect resistance | Requires pre-drilling |
| Attractive reddish-brown color | Can be difficult to dry |
| Long-lasting outdoor performance | Can experience checking and movement |
| Good wear resistance | Usually costs more than common softwoods |
Advantages of Massaranduba Wood Decking
1. Extremely Hard
Massaranduba has a Janka hardness of approximately 3,190 lbf, making it much harder than many common decking woods. Its hardness helps the surface resist dents, impacts, and general wear.
This makes it particularly useful for decks that receive heavy foot traffic.
2. Excellent Natural Durability
Massaranduba is classified as very durable and has good resistance to decay and many insect attacks. This makes it suitable for exterior applications where wood is exposed to changing weather conditions.
3. Attractive Color
Fresh Massaranduba decking has a rich reddish-brown to dark red-brown color.
Over time, untreated outdoor wood naturally weathers and becomes gray or silver-gray. If you want to maintain the original reddish color, a suitable UV-protective finish can be applied.
4. Good Wear Resistance
The hardness of Massaranduba makes it suitable for decks that experience frequent use.
It is less likely to develop deep dents from normal foot traffic and outdoor furniture than softer decking species.
5. Long Outdoor Service
Properly installed Massaranduba decking can provide a long service life because of its natural durability.
The actual lifespan depends on installation, climate, drainage, moisture exposure, maintenance, and the quality of the lumber.
Disadvantages of Massaranduba Decking
1. Difficult to Work With
Massaranduba is extremely dense, so cutting and drilling require more effort than many common decking woods.
It can also have a significant dulling effect on cutting tools. Carbide-tipped blades and drill bits are recommended for demanding installations.
2. Pre-Drilling Is Necessary
Because of its high hardness, directly driving screws into Massaranduba can be difficult and may damage the fastener or board.
Pre-drilling screw holes is recommended before fastening the boards.
3. Heavy Weight
Massaranduba has a density of around 1,000 kg/m³, making it significantly heavier than many common decking materials.
This can make transportation and installation more difficult, particularly for long boards.
4. Drying and Movement
Massaranduba can be difficult to dry properly. Technical data reports relatively high tangential and radial shrinkage, meaning moisture content needs to be considered carefully during installation.
Using decking that has been properly dried for its intended application is important.
5. Higher Cost
Massaranduba generally costs more than common softwood decking because it is a dense tropical hardwood.
However, the initial price should be considered alongside its durability and expected service life.
How to Install Massaranduba Wood Decking
Installing Massaranduba requires more preparation than installing softer decking species.
1. Allow the Boards to Acclimate
Allow the decking to acclimate according to the lumber supplier’s recommendations before installation.
The correct acclimation period depends on the moisture content of the boards and the local environment.
2. Use Proper Joist Spacing
Joist spacing should be selected according to the board thickness, span, load, and applicable decking specifications.
For example, some suppliers recommend approximately 16 inches on center for standard residential Massaranduba decking, but the manufacturer’s instructions for the specific board should take priority.
3. Pre-Drill Every Screw Hole
Pre-drilling is one of the most important installation steps.
Massaranduba is too dense for reliable direct fastening in many applications. Use a suitable drill bit and drill the pilot holes according to the fastener manufacturer’s recommendations.
4. Use Corrosion-Resistant Fasteners
Outdoor hardwood decking should be installed with appropriate corrosion-resistant fasteners.
Stainless steel fasteners are commonly recommended for Massaranduba decking, particularly in demanding outdoor environments.
5. Leave Appropriate Board Gaps
Deck boards need enough space to accommodate moisture-related movement and allow water to drain.
The required gap depends on the board moisture content, width, installation conditions, and manufacturer’s recommendations.
Do not use a single gap measurement for every Massaranduba deck.
Massaranduba Decking Maintenance
One advantage of Massaranduba is that it does not require a finish simply to remain durable outdoors. However, maintenance may be desirable if you want to preserve its original color.
To Maintain the Natural Color
Use a suitable exterior penetrating oil or UV-protective finish according to the product manufacturer’s instructions.
Regular cleaning is also important to remove dirt, leaves, and other debris.
To Allow the Wood to Weather
You can leave Massaranduba unfinished and allow it to naturally weather.
The reddish-brown color will gradually fade toward a gray or silver-gray appearance. This weathering does not necessarily mean the wood has lost its structural durability.
Basic Maintenance Checklist
- Clean the deck periodically.
- Remove leaves and standing debris.
- Keep drainage areas clear.
- Inspect boards for cracks or damaged areas.
- Check fasteners periodically.
- Refinish only when necessary.
- Follow the finish manufacturer’s maintenance instructions.
Does Massaranduba Decking Need to Be Sealed?
Not necessarily.
Massaranduba’s natural durability means a protective finish is not required simply to make the wood last outdoors. However, a suitable UV-protective finish can help maintain its original reddish-brown appearance.
If you prefer the natural weathered look, the decking can be allowed to turn gray over time.
Massaranduba Decking vs Ipe
Ipe and Massaranduba are both premium tropical hardwood decking options.
| Feature | Massaranduba | Ipe |
|---|---|---|
| Janka hardness | ~3,190 lbf | ~3,680 lbf |
| Density | ~1,000 kg/m³ | ~1,050 kg/m³ |
| Durability | Very high | Very high |
| Color | Reddish-brown | Brown to dark brown |
| Workability | Difficult | Very difficult |
| Outdoor use | Excellent | Excellent |
| Maintenance | Relatively low | Relatively low |
Ipe is generally harder, but Massaranduba still offers very high hardness and durability. The better choice depends on price, appearance, availability, and the requirements of the deck.
Massaranduba Decking vs Cumaru
Cumaru is another dense tropical hardwood commonly used for outdoor decking.
Both species are very hard and durable. Massaranduba has a Janka hardness around 3,190 lbf, while Cumaru is commonly reported around 3,200 lbf in decking comparisons.
The differences between them are relatively small in terms of hardness, so factors such as color, price, availability, and board quality may be more important when choosing between them.
Is Massaranduba Good for Decking?
Yes. Massaranduba is an excellent choice for decking when you want a very hard, durable, and naturally decay-resistant tropical hardwood.
Its biggest advantages are its:
- High hardness
- Natural durability
- Resistance to wear
- Attractive reddish-brown color
- Good outdoor performance
Its main drawbacks are its weight, difficult machining, need for pre-drilling, and sensitivity to moisture-related movement during drying and installation.
How Long Does Massaranduba Decking Last?
There is no single guaranteed lifespan for Massaranduba decking.
A properly installed deck made from high-quality, properly dried Massaranduba can last for decades. Actual service life depends on climate, drainage, installation quality, board quality, moisture exposure, and maintenance.
Rather than relying on a specific number of years, evaluate the quality of the lumber and installation conditions when estimating service life.
Is Massaranduba Decking Expensive?
Massaranduba is usually more expensive than pressure-treated pine and other common softwood decking.
However, it can be less expensive than some premium tropical hardwoods, depending on the supplier and market.
The final cost includes more than the boards. You should also consider:
- Fasteners
- Substructure
- Cutting and drilling
- Installation labor
- Finishing
- Transportation
- Long-term maintenance
Is Massaranduba Decking Worth It?
Massaranduba can be worth the additional cost if you want a long-lasting natural hardwood deck with high resistance to wear and outdoor conditions.
It may not be the best option if your main priority is:
- Lowest initial cost
- Lightweight boards
- Easy DIY installation
- Easy cutting and drilling
For homeowners who prioritize durability and the appearance of natural tropical hardwood, however, Massaranduba is a strong decking option.
Frequently Asked Questions
Is Massaranduba good for decking?
Yes. Massaranduba is very hard, durable, and naturally resistant to decay, making it well suited to outdoor decking.
Is Massaranduba better than Ipe for decking?
Not necessarily. Ipe is generally harder, while Massaranduba can offer excellent durability at a potentially different price point. The best choice depends on budget, appearance, availability, and project requirements.
Does Massaranduba decking rot?
Massaranduba is considered very durable and has good resistance to decay. However, no wood is completely immune to deterioration under every condition. Proper drainage and installation remain important.
Does Massaranduba decking need oil?
No. Oil is optional if you want to maintain the wood’s original reddish-brown color. If left unfinished, Massaranduba will naturally weather toward gray.
Does Massaranduba decking need pre-drilling?
Yes, pre-drilling is strongly recommended because of its extreme density and hardness.
Can Massaranduba decking be left unfinished?
Yes. It can be allowed to weather naturally. The color will gradually change from reddish-brown toward gray or silver-gray.
Is Massaranduba decking slippery?
Like any wood decking, slip resistance depends on surface profile, moisture, algae, maintenance, and installation. Grooved decking profiles are available and may provide additional surface texture.
Is Massaranduba decking sustainable?
Sustainability depends on the source and harvesting practices. When purchasing tropical hardwood, look for responsibly sourced or certified material where available and verify the product’s origin.
Final Thoughts
Massaranduba is one of the hardest and most durable natural hardwoods used for outdoor decking. Its high density, resistance to decay, and attractive reddish-brown appearance make it a strong alternative to other premium tropical decking species.
The trade-off is that Massaranduba is heavy and difficult to work with. Pre-drilling, suitable fasteners, proper board acclimation, and careful installation are especially important.
If you want a natural hardwood deck that can handle heavy use and demanding outdoor conditions, Massaranduba is a very strong option. Just make sure you buy properly dried decking and follow the supplier’s installation specifications.