1x3 Massaranduba Tongue & Groove Siding board profile diagram
Siding

1x3 Massaranduba Tongue & Groove Siding

This 1x3 Massaranduba Tongue & Groove siding board offers unmatched exterior cladding longevity, backed by Massaranduba's 3,190 Janka hardness and a natural lifespan of up to 50+ years. The interlocking tongue and groove profile creates tight, seamless joints for exterior cladding and accent walls, with no visible fasteners on the finished surface. In stock and ships nationwide — order Massaranduba siding online or call 1-844-674-4455 for expert guidance.

1 x 3(0.75"×2.5" actual)[19.0mm × 63.5mm]
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SKU: MASS-1X3-TG-SB-L1

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

Premium Performance in Exterior Applications

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:0.91 lbs/LF
1' board:0.91 lbs

1x3 Massaranduba Tongue & Groove Siding — Complete Guide

Everything you need to know about t&g massaranduba siding

About 1x3 Massaranduba Tongue & Groove Siding

Massaranduba lumber is an exceptional choice for exterior siding and cladding applications due to its superior dimensional stability and weather resistance. The tongue-groove profile enhances the aesthetic appeal, creating clean shadow lines while allowing for versatile installation orientations. This profile is particularly effective in minimizing gaps, thus contributing to the overall durability and insulation properties of the structure.

  • Superior weather resistance
  • Exceptional dimensional stability
  • Attractive tongue-groove profile for seamless joints
  • Ideal for aesthetic and functional applications in exterior settings

Key Benefits

Durability

Massaranduba is renowned for its hardness and resistance to decay, making it ideal for the challenging climates of exterior applications.

Aesthetics

The tongue-groove profile creates an elegant appearance with uniform shadow lines, enhancing the overall architectural design.

Longevity

With a Janka hardness of 3190, Massaranduba offers longevity that makes it a cost-effective choice over the lifetime of the structure.

Technical Specifications

Janka Hardness

3190

Density

42 lbs/ft³

Durability Rating

Class 1 - High resistance to decay and insect attack

Dimensional Stability

Excellent, stable under varying moisture levels

Installation Guide

Difficulty:
Moderate

Key Tips:

  • Ensure proper acclimatization before installation
  • Leave adequate gaps for expansion and contraction
  • Utilize a level for accurate alignment

Recommended Tools:

Circular saw
Drill and screws
Measuring tape

Maintenance & Care

Cleaning

Keep the surface clean by washing with mild soap and water. Avoid harsh chemicals that may damage the wood.

Finishing

Periodic maintenance with wood oil or sealer is recommended to preserve color and prevent weather damage.

Weathering

Massaranduba naturally weathers to a silvery hue over time when untreated, which may be desirable for aesthetic purposes.

Frequently Asked Questions

A 1x3 Massaranduba board weighs approximately 0.91 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 siding 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 1x3 Massaranduba board has actual finished dimensions of 0.75" × 2.5" (19.0 x 63.5 mm). The "1x3" 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 (0.75" × 2.5") 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

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