5/4x4 Massaranduba Wood Decking board profile diagram
Decking

5/4x4 Massaranduba Wood Decking

This 5/4x4 Massaranduba Wood decking board pairs the proven outdoor performance of Massaranduba (Brazilian Redwood) with a 3,190 Janka hardness rating — one of the hardest commercially available woods on earth. This naturally durable hardwood withstands extreme weather, UV exposure, and heavy foot traffic without chemical treatment — perfect for exterior decks, patios, and pool surrounds. In stock and ships nationwide — order Massaranduba decking online or call 1-844-674-4455 for expert guidance.

5/4 x 4(1"×3.5" actual)[25.4mm × 88.9mm]
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Ships Nationwide
SKU: MASS-54X4-E4E-SB-L1

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

The Premium Choice for Long-Lasting Outdoor Spaces

Eased-Edge (Standard)

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:1.70 lbs/LF
1' board:2 lbs

5/4x4 Massaranduba Wood Decking — Complete Guide

Everything you need to know about eased-edge massaranduba decking

About 5/4x4 Massaranduba Wood Decking

Massaranduba lumber, particularly in a 5/4x4 (nominal) / 1x3.5 (actual) profile, is an exceptional choice for decking applications. Known for its incredible strength and durability, Massaranduba, also known as Brazilian Redwood, provides superior weather resistance, making it ideal for outdoor environments. The E4E profile enhances the visual appeal and simplifies the fastening process, ensuring a secure and attractive finish for any decking project.

  • Remarkable strength and durability for outdoor use
  • Excellent resistance to rot, insects, and moisture
  • E4E profile offers a smooth finish and easy installation
  • Stylish appearance enhances outdoor aesthetics

Key Benefits

Superior Durability

Massaranduba is renowned for its high durability rating, resisting rot and insect damage effectively, making it a long-lasting choice for decking.

Low Maintenance

This lumber requires minimal upkeep due to its natural oils that protect against moisture and decay, offering convenience for homeowners.

Aesthetic Appeal

The rich, reddish-brown tones and unique grain patterns of Massaranduba add a sophisticated look to any outdoor space, elevating the overall design.

Technical Specifications

Janka Hardness

3190

Density

1,090 kg/m³ (68 lb/ft³)

Durability Rating

Class 1 (highest durability)

Dimensional Stability

Excellent dimensional stability; minimal shrinkage and expansion

Installation Guide

Difficulty:
Moderate

Key Tips:

  • Allow for proper expansion spacing of at least 1/4 inch between boards
  • Ensure adequate ventilation under the deck to prevent moisture buildup
  • Use stainless steel or coated fasteners to prevent rusting

Recommended Tools:

Drill
Circular saw
Tape measure
Level

Maintenance & Care

Cleaning

Regularly sweep and wash with mild soap and water to prevent dirt buildup. Avoid harsh chemicals that may harm the wood's finish.

Finishing

Reapply a UV-protective finish every 1-2 years to maintain color and protect from sun damage.

Weathering

While naturally resistant, continual exposure to the elements can fade the wood; routine maintenance is advised.

Frequently Asked Questions

A 5/4x4 Massaranduba board weighs approximately 1.70 lbs per linear foot. Massaranduba has a density of about 65 lbs/ft³, making it one of the densest commercially available hardwoods. Always factor weight into your structural and shipping calculations.

Yes — Massaranduba is rated Durability Class 1 (Very Durable) and is naturally resistant to rot, decay, insects, and fungal attack without chemical treatment. It is naturally durable and performs exceptionally well in full exterior exposure including decking applications. While ground contact is possible, we recommend elevating Massaranduba boards at least 6" above grade for maximum lifespan.

Massaranduba outperforms composite in hardness (3,190 vs ~200 Janka), lifespan (up to 50+ years vs 25-30 years), and heat resistance. Unlike composites, Massaranduba won't melt, warp in extreme heat, or fade significantly. While initial cost is similar ($8-15/LF installed), Massaranduba costs less over its much longer lifetime. Composites do offer lower upfront maintenance.

Massaranduba 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.

Massaranduba is DIY-friendly with proper preparation. Key requirements: (1) Always pre-drill all screw holes — Massaranduba 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 5/4x4 Massaranduba board has actual finished dimensions of 1" × 3.5" (25.4 x 88.9 mm). The "5/4x4" 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" × 3.5") when calculating material quantities and coverage for your project.

We responsibly, legally, and ethically source all our Massaranduba. We work only with suppliers who follow responsible forestry practices with full chain-of-custody transparency. Note: We are not FSC certified. Massaranduba trees grow naturally in diverse tropical forests and regenerate well under managed harvest. The extremely long lifespan (up to 50+ 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