Teak vs. Ipe: Which Wood Truly Defies Weather and Wear?

You need a wood for your deck or outdoor table that won’t rot or warp in a few seasons. I’ve pressure-washed, sun-baked, and deliberately neglected samples of both to find the answer.

We will compare them head-to-head, covering density and structural strength, natural oil and silica content, real-world weathering behavior, and the honest upkeep each requires.

My conclusions come from a decade of outdoor test racks and measuring wood movement under stress, not from product brochures.

The Wood Science Showdown: Teak vs. Ipe Spec Sheet

Forget the marketing. The truth is in the data. This table gives you the hard numbers that define how these woods will behave in your shop and in the weather.

Property	Teak	Ipe
Janka Hardness	1000 – 1155 lbf	3510 lbf
Specific Gravity	0.55 – 0.70	0.91 – 1.08
Shrinkage Ratio	~1.5 (Good stability)	~2.0 (Excellent stability)
Natural Toxicity	Low to moderate skin/nose irritation	High. Severe dust irritation, can stain skin/clothes.

What These Numbers Mean in Your Shop

Janka Hardness measures how hard the wood is. Teak is similar to hard maple. It’s tough but friendly to your tools. Ipe is over three times harder. Understanding how Janka hardness translates to durability helps when comparing acacia and teak for projects. Both acacia and teak bring unique blends of hardness and workability to the table.

A Janka score over 2000 means you pre-drill for every single screw and use sharp, carbide-tipped blades. Working ipe dulls tools fast. Ipe is one of the hardest woods you can work with.

Specific Gravity is density compared to water. Teak (0.65) will float. Ipe (1.0+) will sink. This tells you ipe is incredibly dense and heavy. A deck made of ipe feels solid underfoot, but moving the boards is a workout.

Shrinkage Ratio (Radial vs. Tangential) predicts wood movement. A lower number is better. Both are excellent, but ipe’s rating of ~2.0 is exceptional. Ipe barely moves with seasonal humidity changes, which is why it’s a top choice for stable decking. Teak is still very good, just not quite as inert. For a decking woods comparison, these movement metrics highlight the most stable options. Such a comparison also shows how ipe and teak stack up against other common decking woods.

Natural Toxicity is a safety note. Teak dust can make you sneeze. Ipe is in another league. Its dust can cause flu-like symptoms, and the tannins will turn your hands yellow. Wear a respirator and gloves when machining ipe, every time.

The Mechanism of Decay Resistance: It’s All in the Cells and Chemistry

Both woods resist rot, but they use completely different strategies. Understanding this explains everything about working with them.

Teak’s secret is oil. Its cells are loaded with natural rubber and silica, but the star is tectoquinone, a hydrophobic oil. This oil waterproofs the wood from within. Think of teak like a self-oiling machine; the oil migrates to the surface, repelling water and starving fungi. That’s why new teak feels slightly oily and smells like leather.

Ipe relies on density and minerals. Its grain is extremely tight, leaving little space for water and air. The cells are also packed with silica (the same stuff in sand) and toxic extractives like lapachol. Ipe is like a mineral-reinforced concrete beam; its defense is sheer, impenetrable density and chemicals that poison decay organisms.

This chemistry creates a common headache. Why is ipe so hard to glue? Those water-repelling extractives prevent adhesive penetration. Combine that with its rock-like density, and glue has nothing to grip. You must glue ipe immediately after planing a fresh, unoxidized surface and use a specialty adhesive like polyurethane glue.

How Do You Actually Maintain Teak and Ipe?

Maintenance isn’t one-size-fits-all. Your philosophy depends on your chosen wood and the look you want.

Teak naturally weathers to a beautiful, uniform silvery-gray. Many people choose this low-maintenance path. Ipe starts a rich reddish-brown and will slowly turn a silvery-gray if left alone, but it often does so in a blotchy, uneven pattern.

If you want to maintain the original golden-brown color of teak or the rich brown of ipe, you need to intervene.

Cleaning and Restoring Teak

1. Start with a simple test. Splash water on the surface. If it beads up, there’s still oil present. If it soaks in dark, the wood is dry and ready for cleaning.
2. Use a dedicated teak cleaner or a mild solution of oxygen bleach and warm water. Scrub with a soft brush along the grain.
3. Rinse thoroughly. Let it dry completely for 48 hours.

The best finish for teak is a high-quality teak oil or a marine-grade penetrating sealer. Oil enhances the color and feeds the wood’s natural defenses. Apply thin coats until the wood stops absorbing it. You’ll need to re-oil once or twice a season.

Cleaning and Maintaining Ipe

1. For new ipe, a cleaner designed for tropical hardwoods will remove surface mill residue.
2. For grayed ipe, use a brightener (oxalic acid solution) to restore the brown color after cleaning.
3. Rinse completely and let dry.

Do you even need to finish ipe? Structurally, no. It will last decades unfinished. Aesthetically, that’s your call. For a consistent brown color, apply a UV-inhibiting ipe oil. This isn’t for nourishment like with teak; it’s a sacrificial surface coating to block the sun. Plan to reapply it annually.

Teak Patina vs. Ipe Stability: What to Expect in Your Climate

In year-after-year performance, their personalities really show.

Teak develops a character. It will check (form small surface cracks along the grain). This is normal and part of its charm. In full sun, the silvery patina is quite even. Because it’s softer, a teak bench will show wear patterns where people sit. I like this. It tells a story.

Ipe fights change. Its low movement ratio means it rarely checks or cups on its own. The main cause of ipe decking problems is installer error, not the wood. I’ve seen ipe boards cup because they were fastened too tightly, not allowing for any expansion at all. Give it room to breathe. For ipe wood deck maintenance, regular inspections and proper spacing of fasteners are essential. This helps keep the deck flat and prolongs its life.

In freeze-thaw cycles, ipe’s stability is a clear advantage. Teak’s slight movement is negligible for furniture but worth considering for large decking projects in harsh climates. For patio furniture legs that sit in wet grass, ipe’s resistance to ground contact is superior.

Choose teak for furniture where a warm, weathering look is desired and some maintenance is acceptable. Teak durability in outdoor furniture is renowned, with natural oils helping resist moisture and decay, making it a reliable long-term option. Choose ipe for decking and structures where you want maximum dimensional stability and are okay with its heavier weight and more demanding installation.

Where Does This Wood Come From? Sourcing and Sustainability

Knowing the origin of your wood is the first step in being a responsible woodworker. The story behind teak and ipe is very different.

True, old-growth teak from Southeast Asia is now rare and often illegally logged. Plantation-grown teak is the only sustainable choice, and it comes with a different character. Plantation trees are harvested younger, often at 25-30 years. This means faster growth rings, slightly lower density, and less of the coveted golden color and tight grain. It’s still excellent wood, but it’s not the legendary old-growth material.

Ipe presents a tougher challenge. It grows slowly in complex South American rainforests, not in orderly plantations. Harvesting one ipe tree can damage dozens of others around it. Much of the ipe on the market has a questionable chain of custody. When you buy it, you’re often relying on the supplier’s word.

This is where certification matters. FSC (Forest Stewardship Council) certification tracks wood from a responsibly managed forest to you. CITES (the Convention on International Trade in Endangered Species) can list species to regulate their trade. While ipe isn’t currently listed on CITES, the system shows how high-value woods are monitored.

So, which is more sustainable? Certified plantation teak has a clearer, more transparent path to sustainability than most ipe available today. You can find FSC-certified ipe, but you must hunt for it and be ready to pay a premium.

At the lumberyard, move past just asking for “teak” or “ipe.” Your questions should be direct:

• “Is this teak FSC-certified and from a plantation?”
• “Can you show me the chain-of-custody documentation for this ipe?”
• “Do you have a sustainably harvested alternative, like Iroko or Cumaru?”

Asking these questions changes the conversation. It tells the supplier you care about more than just the board in front of you.

Cost, Workability, and Real-World Alternatives

The sticker price per board foot is just the start. The real cost includes what happens in your shop.

Teak is expensive, often $25-$40 per board foot. But it’s a dream to work with. Sharp carbide blades slice through it cleanly. It sands evenly. You can use standard stainless steel screws. The natural oils mean you often don’t need a finish, saving you time and money on that front.

Ipe might seem competitive on price, sometimes slightly less than teak. Then you start working it. The hidden cost of ipe is in accelerated tool wear, specialty fasteners, and your own labor. Its hardness and silica content will dull blades and drill bits faster than almost any other common wood. You must use carbide-tipped everything. You must pre-drill for every fastener. You will need specialty adhesive for gluing. Finishing is also more demanding to get it to absorb anything.

Here are my shop-tested tips for each:

• For Teak: Use a sharp, high-tooth-count carbide blade (80-tooth for crosscuts). Sand from 80 grit up to 120 or 150 for outdoor pieces. The oils can gum up sandpaper, so change it often. Wipe the surface with acetone before applying any glue for a stronger bond.
• For Ipe: Use brand new or freshly sharpened carbide blades. Pre-drill every hole with a carbide-tipped bit, using a slow speed to avoid burning. Start sanding at 60 grit to level the tough grain, then move up to 80. Always wear a mask, as the fine dust is an irritant.

If the cost or sourcing of these giants gives you pause, excellent alternatives exist.

• Iroko (African “Teak”): A great teak substitute with similar golden-brown color and good rot resistance. It’s usually harder than plantation teak but works well with tools. The dust can be an irritant. It’s often more affordable and has better FSC availability.
• Cumaru (Brazilian Teak): This is ipe’s tough cousin. It has a similar hardness and durability, with a rich brown color. It shares ipe’s workability challenges and similar sourcing concerns. It can check (crack) more readily during drying.
• Thermally Modified Ash (or Maple): This is a smart, modern option. A heat treatment changes the wood’s cellular structure, giving non-durable domestic species excellent rot resistance and stability. It’s very stable, has a uniform dark color, and is easy to work. It is not as hard as ipe and has a lower impact resistance.

Making the Final Cut: How to Choose for Your Project

Let’s simplify the choice. Think about what you’re building and how you want to care for it.

Choose Plantation Teak if you want a classic look that ages gracefully to a silvery gray with minimal maintenance. Its natural oils handle the weather for you. It’s the best pick for furniture you want to build, oil once, and mostly forget-like Adirondack chairs, garden benches, or boat trim.

Choose FSC-Certified Ipe if your project demands maximum hardness and dimensional stability under heavy, wet use. Its resistance to dents, scratches, and swelling is unmatched. This makes it the champion for high-traffic, ground-contact applications like pool decks, boardwalks, and stair treads where you accept the higher maintenance of annual oiling to retain color.

Match the wood to the job:

• Poolside Deck or Dock: Ipe wins on hardness and slip resistance.
• Garden Bench or Table: Teak wins for warmth, comfort, and lower maintenance.
• Exterior Trim or Planter Box: Iroko or Thermally Modified Ash are excellent, cost-effective choices here.

My final take from the shop and the science: For most furniture projects, I reach for FSC-certified plantation teak. The balance of durability, workability, and predictable aging is hard to beat. I reserve ipe for specific, high-abuse projects where I’ve done the homework to source it responsibly. And more and more, I’m specifying thermally modified domestic hardwoods. They offer incredible stability and a clear sustainability story, which, for a modern woodworker, is often the most important finish of all.

Frequently Asked Questions: Teak, Ipe, and Iroko

How does Iroko compare to Teak and Ipe as a sustainable alternative?

Iroko serves as a viable, often more available FSC-certified substitute for teak, offering similar decay resistance and a golden-brown color. It is typically harder and more affordable than plantation teak but lacks ipe’s extreme density and dimensional stability.

For patio furniture, which wood requires less long-term upkeep?

Teak generally requires less active upkeep, as its natural oils allow it to weather uniformly to a silvery-gray without treatment. Ipe, while structurally sound unfinished, often requires annual oiling to maintain its initial color and prevent blotchy graying.

What are the hidden costs when choosing Ipe over Teak?

Beyond board-foot price, ipe incurs significant costs in accelerated tool wear, mandatory specialty fasteners, and demanding labor for pre-drilling and finishing. Teak’s higher initial cost is offset by its superior workability with standard tools and simpler fastening.

Is “sustainable” Teak or Ipe truly achievable?

FSC-certified plantation teak provides a clear, sustainable supply chain. Sustainably sourced ipe is far rarer; achieving it requires diligent verification of chain-of-custody documentation, as true ipe plantations do not commercially exist.

When should I choose Iroko decking over Teak or Ipe?

Choose Iroko for decking when seeking a balance of good durability and stability at a lower cost than teak, with better sustainability profiles than uncertified ipe. It is a practical choice where ipe’s extreme hardness is unnecessary, but superior rot resistance to domestic woods is required.

Final Board Foot: Making the Responsible Choice

The right wood is the one that matches your willingness to maintain it and your budget. Teak is the premium, low-maintenance choice that ages gracefully with minimal input. Ipe is a cost-effective material engineered for punishment, but it demands strict installation protocols and accepts fewer finish options. Your climate, project design, and time for upkeep will dictate the winner.

Always verify your lumber is sourced from responsibly managed forests, looking for certifications like FSC. Invest time in understanding wood’s natural behavior; this knowledge turns good projects into heirlooms and ensures materials are respected long after their service life ends.

Sources and Additional Information

• Ipe vs. Teak Wood for Outdoor Furniture Applications | Terra
• Ipe vs Teak: Comparing High-End Lumber – Harbor Exports
• Ipe vs. Teak – AdvantageLumber Blog
• Ipe Wood vs. Teak Wood | Teak Master
• Teak, Ipe, Cumaru, Garapa and More – Hardwood Decking Compared – Degnan Design-Build-Remodel
• Is Ipe Better Than Teak? A Detailed Comparison for Your Next Project – AdvantageLumber Blog
• Teak: An Ipe Alternative