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Ipe Deck Installation Guide
Everything you need to install Ipe (Brazilian Walnut) decking — joist spacing, board gaps, acclimation, fastener rules, pre-drilling, and species-specific tips.
Janka Hardness
3,680 lbf
Fire Rating
Class A
Lifespan
75+ years
Density
66 lbs/ft³
Ipe Wood Properties for Installation
Pre-Drilling
Required — always
Workability
Difficult — extremely dense, dulls standard blades quickly
Color
Rich chocolate brown, weathers to silver-gray without UV oil.
Tannin Bleed
Minimal tannin bleed. May discolor adjacent concrete temporarily.
Blade Note
Use premium carbide-tipped blades. Expect to replace or resharpen frequently.
Joist Spacing for Ipe Decking
Board Spacing for Ipe
Between Boards
3/32" (about the width of a nickel edge)
End Gap (Structures)
1/8" from fixed structures
Airflow Under Joists
18" minimum unobstructed air under joists
How to Acclimate Ipe Before Installation
Allow 7–14 days for Ipe to acclimate to your local climate before installation. Store boards on blocks at least 12" off the ground with proper ventilation between layers. Cover with plywood — never plastic or tarps.
Climate Note
Ipe performs exceptionally in all US climates — from Florida humidity to Minnesota freeze-thaw. Its extreme density prevents moisture absorption that causes cracking in cold climates.
Fasteners for Ipe Decking
- Fastener type: Stainless steel only (304 or 316 grade). No galvanized.
- Edge distance: 3/4" minimum from board edges
- Pre-drilling: Required — always
Ipe Installation Tips
Pre-drill EVERY hole — Ipe will split or break fasteners without it
Use self-drilling stainless steel screws rated for hardwood
Countersink screws slightly below the surface for a flush finish
Seal all fresh end cuts within 24 hours using end-grain sealer
Do not install over concrete slabs or blocks — ever
Use joist tape (e.g., G-Tape) to protect substructure from moisture
Common Ipe Installation Mistakes
Skipping pre-drilling — causes splitting and broken screw heads
Using galvanized fasteners — causes black staining and corrosion
Insufficient acclimation — boards expand/contract unpredictably
No end-grain sealing — leads to checking and end splits
Installing over concrete — traps moisture, causes cupping
Inadequate ventilation — minimum 18" airflow underneath
Build Your Custom Installation Plan
Get a printable, jobsite-ready plan with fastener spacing, joist layout, and climate-specific guidance.
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Ipe Installation FAQ
Common questions about installing Ipe decking.
For 1×4 and 1×6 Ipe boards, maximum joist spacing is 16" on center max. For 5/4×6, you can go up to 24" on center max. For 2×6, up to 32" on center max. Always verify with your local building code.
Required — always. Ipe has a Janka hardness of 3,680 lbf, which makes it essential to pre-drill to prevent splitting and broken fastener heads. Use brad point or Forstner drill bits for the cleanest holes.
Allow 7–14 days for Ipe to acclimate to your local climate. Store on blocks 12" off the ground with proper ventilation. Cover with plywood (NOT tarps or plastic). For a customized estimate, use our Acclimation Calculator.
Stainless steel only (304 or 316 grade). No galvanized. Never use galvanized fasteners with Ipe — they cause black staining and corrosion. For a clean look, use pregrooved Ipe boards with hidden fastener clips.
Leave 3/32" (about the width of a nickel edge) between Ipe boards for ventilation and expansion/contraction. Leave 1/8" from fixed structures from fixed structures like walls or posts.
Ipe decking can last 75+ years outdoors with proper installation and minimal maintenance. It's Class Class A fire rated and naturally resistant to rot, decay, and insects.
Ipe requires more care than softwood or composite due to its density (3,680 lbf Janka). Difficult — extremely dense, dulls standard blades quickly. With the right tools (carbide-tipped blades, stainless steel fasteners) and pre-drilling, both DIYers and contractors install Ipe successfully.