5/4x6 Ipe Tongue & Groove Decking board profile diagram
Decking

5/4x6 Ipe Tongue & Groove Decking

This 5/4x6 Ipe decking board (Tongue & Groove profile) pairs the proven outdoor performance of Ipe (Brazilian Walnut) with a 3,680 Janka hardness rating — one of the hardest commercially available woods on earth. The interlocking tongue and groove profile creates tight, seamless joints for exterior decks, patios, and pool surrounds, with no visible fasteners on the finished surface. In stock and ships nationwide — order 5/4x6 Ipe decking boards online or call 1-844-674-4455 for expert guidance.

5/4 x 6(1"×5.5" actual)[25.4mm × 139.7mm]
Contractor Trusted
Expert Backed
Ships Nationwide
SKU: IPE-54X6-TG-SB-L1

Configure Your Order

Select profile, grade, and length below to see live pricing

The premium choice for durable, weather-resistant outdoor surfaces.

T&G

Select and Better is our standard grade

Length Guide

Available lengths: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22′

Estimated Shipping Weight
Weight per linear foot:2.67 lbs/LF
1' board:2.7 lbs

5/4x6 Ipe T&G Decking — Complete Guide

Everything you need to know about t&g ipe decking

About 5/4x6 Ipe Tongue & Groove Decking

Ipe lumber is renowned in the decking world for its exceptional strength and durability, making it an ideal material for both residential and commercial decking applications. With a natural resistance to weather conditions, insects, and decay, Ipe wood not only lasts but also maintains its appearance over time. The tongue-groove profile further enhances the aesthetic appeal of deck boards while simplifying installation, ensuring a seamless look and creating a solid bonding between boards that minimizes movement and warping.

  • Exceptionally strong with a Janka hardness of 3680, ensuring resistance to denting and wear.
  • Natural resistance to rot, pests, and moisture allows for extended use in various climates.
  • Tongue-groove design enhances the visual appeal and creates a secure, tight fit for deck boards.

Key Benefits

Unmatched Durability

Ipe is one of the hardest woods available, making it highly resistant to wear from foot traffic and environmental factors.

Natural Weather Resistance

With its tight grain and natural oils, Ipe resists moisture absorption, preventing swelling and warping over time.

Visually Striking Appearance

The rich brown tones and fine grain patterns of Ipe enhance the aesthetics of any outdoor space, creating a timeless look.

Ease of Installation

The tongue-groove profile creates a secure fit, allowing for easier installation and reducing the likelihood of warping or movement.

Technical Specifications

Janka Hardness

3680

Density

69 lbs/ft³

Durability Rating

Class A (very resistant to decay)

Dimensional Stability

Excellent dimensional stability with low shrinkage rates

Installation Guide

Difficulty:
Moderate

Key Tips:

  • Ensure proper spacing between boards for expansion and contraction.
  • Use a high-quality exterior wood glue in tongue and groove joints for added stability.
  • Allow acclimatization of Ipe wood prior to installation in the environment.

Recommended Tools:

Miter saw
Drill with wood bits
Fastening or pneumatic nail gun

Maintenance & Care

Cleaning

For best results, clean the deck regularly with a mild soap solution and a brush to remove dirt and debris.

Finishing

Periodic application of a UV-protective oil finish is recommended to maintain the color and protection.

Weathering

Ipe naturally weathers to a silver-gray color if left untreated, which is aesthetically pleasing and does not affect performance.

5/4x6 Ipe Tongue & Groove Decking — Frequently Asked Questions

A 5/4x6 Ipe board weighs approximately 2.67 lbs per linear foot. Ipe has a density of about 69 lbs/ft³, making it one of the densest commercially available hardwoods. A 12-foot 5/4x6 Ipe board weighs approximately 32 lbs. Always factor weight into your structural and shipping calculations.

5/4x6 Ipe decking has an expected service life of up to 75+ years when properly installed. This is 3-5× longer than pressure-treated pine and 2-3× longer than cedar. Ipe achieves this exceptional longevity through its 3,680 Janka hardness and Class 1 durability rating, providing built-in resistance to rot, decay, insects, and fungal growth without chemical preservatives.

5/4x6 Ipe decking pricing varies by profile, grade, and board length. Select and Better grade boards typically range from $4-$12 per linear foot before shipping. While the upfront cost is higher than pressure-treated lumber, Ipe's up to 75+-year service life makes the lifetime cost per year significantly lower. Use the configurator above for exact pricing, or request a custom quote for large orders.

Yes — 5/4x6 Ipe wood decking outperforms composite in hardness (3,680 vs ~200 Janka), lifespan (up to 75+ years vs 25-30 years), and heat resistance. Unlike composites, Ipe won't melt, warp in extreme heat, or fade significantly. While initial cost is similar ($8-15/LF installed), Ipe wood decking costs less over its much longer lifetime. Composites do offer lower upfront maintenance, but Ipe's natural beauty and durability make it the superior long-term investment.

Ipe is widely considered one of the best woods for 5/4x6 decking boards. With a 3,680 Janka hardness rating, Class A fire-rated certification, and up to 75+-year lifespan, Ipe (Brazilian Walnut) outperforms nearly every other commercially available wood species. Other excellent options include Cumaru (Brazilian Teak) and Massaranduba (Brazilian Redwood), but Ipe remains the industry benchmark for premium outdoor hardwood applications.

Ipe requires minimal maintenance. Without treatment, it naturally weathers to an elegant silver-gray patina over 6-12 months. To maintain the original warm brown color, apply a UV-inhibiting penetrating oil (like Ipe Oil or Penofin) once or twice annually. Cleaning involves periodic washing with a mild soap solution. No sanding, staining, or sealing is required for structural durability.

Ipe is DIY-friendly with proper preparation. Key requirements: (1) Always pre-drill all screw holes — Ipe is too hard for direct screwing. (2) Use only 305 or 316 stainless steel fasteners — standard hardware will corrode and stain. (3) Face-screw with stainless steel trim-head screws. (4) Allow boards to acclimate on-site for 5-7 days before installation. A compound miter saw with a carbide-tipped blade is recommended.

A nominal 5/4x6 Ipe board has actual finished dimensions of 1" × 5.5" (25.4 x 139.7 mm). The "5/4x6" is the nominal (rough-cut) size — after kiln drying and precision surfacing, all hardwood lumber finishes slightly smaller. This is standard across the lumber industry, similar to how a nominal 2×4 softwood measures 1.5" × 3.5". Always use the actual dimensions (1" × 5.5") when calculating material quantities and coverage for your project.

We responsibly, legally, and ethically source all our Ipe. We work only with suppliers who follow responsible forestry practices with full chain-of-custody transparency. Note: We are not FSC certified. Ipe trees grow naturally in diverse tropical forests and regenerate well under managed harvest. The extremely long lifespan (up to 75+ years) means fewer replacements compared to softwood or composite alternatives, reducing long-term environmental impact.

Shipping & Delivery

Nationwide delivery: We ship to all 50 states via LTL freight, flatbed, or terminal pickup

Typical lead time: 5-10 business days for standard orders (custom milling may add 2-3 weeks)

Shipping estimate: Final freight cost calculated at checkout based on your location and order size

Rush service available: Contact us for expedited milling and shipping options

5/4x6 Ipe Tongue & Groove Decking — Complete Buyer's Guide

Ipe, also known as Brazilian Walnut, is a premium tropical hardwood sourced from Central and South America (Brazil, Bolivia, Peru). With a Janka hardness rating of 3,680 lbf and a density of 69 lbs/ft³, Ipe is classified as Class 1 - Very Durable (Up to 75+ Years) — one of the most durable commercial lumber species available. The heartwood exhibits rich brown to olive-brown, darkening to reddish-brown with age with interlocked to irregular grain, fine to medium texture, creating a striking natural appearance that improves with age.

Why Choose 5/4x6 Ipe Wood for Your Deck?

Ipe decking delivers a naturally slip-resistant, splinter-free surface that stays cool underfoot even in direct sunlight. Unlike composite or pressure-treated alternatives, it never fades to a dull gray unless you want the natural silver patina look. Properly installed 5/4x6 Ipe decking delivers a service life of 75+ years with minimal maintenance — an optional annual oil treatment preserves the original color, or you can let the Ipe wood weather to a distinguished silver-gray patina. Ipe carries a Class A (0-25 flame spread), making it suitable for wildfire-prone regions where code-compliant materials are required.

The 5/4x6 tongue & groove (T&G) profile features interlocking edges that create a seamless, flush surface with no visible gaps. Ideal for porch ceilings, soffit installations, and covered porch floors. All Ipe lumber is available in Select and Better grade with lengths ranging from 4′ to 20′. For detailed step-by-step instructions, consult our Ipe installation guide. Long-term care recommendations are covered in our Ipe maintenance guide.

5/4x6 Ipe Decking — Installation & Coverage Specs

  • Recommended joist spacing: 16"–24" on center for 5/4x6 boards (1" actual thickness)
  • Fastener placement: Secure per profile requirements, one fastener per joist minimum
  • Board weight: A 12-foot 5/4x6 Ipe board weighs approximately 32 lbs (2.64 lbs/LF)
  • Coverage: Each 12-foot 5/4x6 board covers 5.5 sq ft of decking surface (5.5" face width)
  • Pre-drilling required: Always pre-drill in Ipe — the 3,680 lbf hardness prevents direct screwing

Janka Hardness

3,680 lbf

Service Life

75+ years

Durability

Very Durable (Up to 75+ Years)

Fire Rating

Class A (0-25 flame spread)

5/4x6 Ipe Decking — Frequently Asked Questions

5/4x6 Ipe decking has an expected service life of 75+ years when properly installed and maintained. This is 3-5x longer than pressure-treated pine and 2-3x longer than cedar. Ipe achieves this exceptional longevity through its natural density (Janka hardness: 3,680 lbf) and Class 1 durability rating, which provide built-in resistance to rot, decay, insects, and fungal growth — all without chemical preservatives.

5/4x6 tongue & groove Ipe boards interlock via a milled tongue on one edge and a corresponding groove on the other. Secure each board by blind-nailing through the tongue at a 45° angle using stainless steel ring-shank nails or by face-screwing with countersunk stainless steel screws. Always pre-drill holes in Ipe to prevent splitting. T&G Ipe should only be used in covered or semi-protected areas.

5/4x6 Ipe decking pricing varies by profile, grade, and board length. 5/4x6 Tongue & Groove boards in Select and Better grade typically range from $4-$12 per linear foot before shipping. While the upfront cost is higher than pressure-treated lumber, Ipe's 75+ years service life makes the lifetime cost per year significantly lower. Use our online configurator above to see exact pricing for your selected options, or request a custom quote for large orders.

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