IPE — the only decking that outlives the house

IPE (pronounced 'ee-pay'), also called Brazilian Walnut, Lapacho, or Tabebuia spp., is a South American tropical hardwood. It's roughly 30-40% denser than red oak, with a Janka hardness of 3,680 (vs 1,290 for oak, 540 for cedar). The density is why it's expensive — boards are slow-growth, take 60-100 years to mature, and the dense wood literally dulls saw blades faster. Plus it's mostly harvested from sustainable FSC-certified Brazilian plantations now, which raises cost. Installed: $20-35/sqft vs $7-12/sqft for cedar or $14-22/sqft for premium composite.

Yes — and this is actually conservative. IPE has a natural Class A fire rating (same as concrete and steel) without any chemical treatment, plus inherent rot, mold, fungus, and termite resistance from its dense oil-rich grain. Original IPE installations from the 1920s-1940s (Boston Harbor docks, Atlantic City boardwalk) are still structurally sound today after 80-100 years. Modern residential IPE decks routinely last 50+ years with basic maintenance. The 25-year average lifespan often cited refers to surface aesthetics, not structural life.

UV light breaks down lignin (the dark resin in the cell walls) on the exposed surface, creating a thin silvered layer typically 1-2mm thick. Underneath, the wood is unchanged — same color, same density, same rot resistance. Sand off 1mm and you reveal fresh chocolate-brown wood. The silvering is purely cosmetic and many homeowners actually prefer it (the 'driftwood' look). If you don't, applying a penetrating UV-blocking oil every 12-18 months prevents it.

A penetrating UV-blocking oil designed for tropical hardwoods. Recommended brands: Penofin Verde, IPE Oil by DeckWise, Messmer's UV Plus for Hardwoods. Apply 2 coats first year then 1 coat annually. Avoid film-forming products (varnishes, polyurethanes) — they peel off IPE within 2 seasons because the wood's natural oils prevent adhesion. Material cost ~$0.40-0.80 per sqft per application; labor 4-6 hours for a 200 sqft deck.

Yes, but with caveats. IPE is too hard to groove cleanly with standard router bits — boards must come pre-grooved from the supplier (DeckWise IPE Clip system, Eb-Ty pre-groove). DIY grooving in the field works but burns through expensive carbide bits fast. Stainless screws are mandatory (galvanized corrodes from IPE's natural acidity). Pre-drilling every fastener hole is non-negotiable: IPE will split if face-screwed without pilot holes. Account for ~50% more install labor than composite hidden-clip systems.

Mixed — depends entirely on sourcing. FSC-certified IPE (look for the Forest Stewardship Council stamp) comes from managed sustainable plantations and is legitimately eco-friendly. Non-FSC IPE may come from illegal logging of old-growth Amazon rainforest, which is a significant problem. Always require FSC paperwork from your supplier — reputable IPE distributors have it readily available. Cumaru and Garapa are similar tropical hardwoods with the same FSC concern and similar properties.

Different trade-offs. IPE: real wood, longer lifespan (40-75 vs 25-30), naturally cooler underfoot (~7°F cooler than dark composite), but requires oiling and is 1.5-2× the install cost. Composite: zero maintenance, color guaranteed 25-30 years, but heat retention (dark composites get hot), looks synthetic up close, and lifespan caps at ~30 years. IPE is the choice for forever-decks; composite is the choice for forever-easy decks. Both cost roughly the same over 30 years when you factor in IPE's oil cost vs composite's higher upfront price.