5/4x4 Massaranduba Outdoor Flooring

Massaranduba, also known as Brazilian Redwood, is a premium tropical hardwood sourced from Northern South America (Brazil, Suriname, Venezuela). With a Janka hardness rating of 3,190 lbf and a density of 68 lbs/ft³, Massaranduba is classified as Class 1 - Very Durable — one of the most durable commercial lumber species available. The heartwood exhibits deep red to reddish-brown with straight to interlocked grain, fine to medium texture, creating a striking natural appearance that improves with age.

Why Choose 5/4x4 Massaranduba Wood for Your Outdoor Flooring?

Massaranduba outdoor flooring is ideal for covered porches, screened-in rooms, and breezeway floors where a refined, interior-quality finish is needed in a weather-resistant package. Properly installed 5/4x4 Massaranduba outdoor flooring delivers a service life of 50+ years with minimal maintenance — an optional annual oil treatment preserves the original color, or you can let the Massaranduba wood weather to a distinguished silver-gray patina. Massaranduba carries a Class A - Low flame spread, making it suitable for wildfire-prone regions where code-compliant materials are required.

The 5/4x4 eased-edge (E4E) profile features gently rounded edges on all four sides, reducing the risk of splinters and creating a comfortable walking surface. This is the most versatile profile — suitable for face-screw installation with countersunk stainless steel fasteners. All Massaranduba lumber is available in Select and Better grade with lengths ranging from 4′ to 20′. For detailed step-by-step instructions, consult our Massaranduba installation guide. Long-term care recommendations are covered in our Massaranduba maintenance guide.

5/4x4 Massaranduba Outdoor Flooring — Installation & Coverage Specs

• Recommended joist spacing: 16"–24" on center for 5/4x4 boards (1" actual thickness)
• Fastener placement: Face-screw with two stainless steel screws per joist, approximately 1" from each edge of the 3.5" face
• Board weight: A 12-foot 5/4x4 Massaranduba board weighs approximately 20 lbs (1.68 lbs/LF)
• Coverage: Each 12-foot 5/4x4 board covers 3.5 sq ft of outdoor flooring surface (3.5" face width)
• Pre-drilling required: Always pre-drill in Massaranduba — the 3,190 lbf hardness prevents direct screwing