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1x4 Red Balau Tongue & Groove Outdoor Flooring board profile diagram
Outdoor Flooring

1x4 Red Balau Tongue & Groove Outdoor Flooring

Engineered for covered porches and protected outdoor spaces, this 1x4 Red Balau outdoor flooring board (Tongue & Groove profile) leverages Red Balau's 1,580 Janka hardness for a natural lifespan of up to 40+ years. The interlocking tongue and groove profile creates tight, seamless joints for covered porches and outdoor living spaces, with no visible fasteners on the finished surface. In stock and ships nationwide — order 1x4 Red Balau outdoor flooring boards online or call 1-844-674-4455 for expert guidance.

1 x 4(0.75"×3.5" actual)[19.0mm × 88.9mm]
Contractor Trusted
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Ships Nationwide
SKU: REDB-1X4-TG-SB-L1

Configure Your Order

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

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:1.28 lbs/LF
1' board:1.3 lbs

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1x4 Red Balau Tongue & Groove Outdoor Flooring — Complete Buyer's Guide

Red Balau, also known as Bangkirai, is a premium tropical hardwood sourced from Southeast Asia (Malaysia, Indonesia, Philippines). With a Janka hardness rating of 1,580 lbf and a density of 59 lbs/ft³, Red Balau is classified as Class 2 - Durable — one of the most durable commercial lumber species available. The heartwood exhibits light to medium red-brown with interlocked grain, moderately coarse texture, creating a striking natural appearance that improves with age.

Why Choose 1x4 Red Balau Wood for Your Outdoor Flooring?

Red Balau 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 1x4 Red Balau outdoor flooring delivers a service life of 40+ years with minimal maintenance — an optional annual oil treatment preserves the original color, or you can let the Red Balau wood weather to a distinguished silver-gray patina. Red Balau carries a Class A - Low flame spread, making it suitable for wildfire-prone regions where code-compliant materials are required.

The 1x4 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 Red Balau lumber is available in Select and Better grade with lengths ranging from 4′ to 20′. For detailed step-by-step instructions, consult our Red Balau installation guide. Long-term care recommendations are covered in our Red Balau maintenance guide.

1x4 Red Balau Outdoor Flooring — Installation & Coverage Specs

  • Recommended joist spacing: 16" on center for 1x4 boards (0.75" actual thickness)
  • Fastener placement: Secure per profile requirements, one fastener per joist minimum
  • Board weight: A 12-foot 1x4 Red Balau board weighs approximately 13 lbs (1.08 lbs/LF)
  • Coverage: Each 12-foot 1x4 board covers 3.5 sq ft of outdoor flooring surface (3.5" face width)
  • Pre-drilling required: Always pre-drill in Red Balau — the 1,580 lbf hardness prevents direct screwing

Janka Hardness

1,580 lbf

Service Life

40+ years

Durability

Durable

Fire Rating

Class A

1x4 Red Balau Outdoor Flooring — Frequently Asked Questions

1x4 Red Balau outdoor flooring has an expected service life of 40+ years when properly installed and maintained. This is 3-5x longer than pressure-treated pine and 2-3x longer than cedar. Red Balau achieves this exceptional longevity through its natural density (Janka hardness: 1,580 lbf) and Class 1 durability rating, which provide built-in resistance to rot, decay, insects, and fungal growth — all without chemical preservatives.

1x4 tongue & groove Red Balau 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 Red Balau to prevent splitting. T&G Red Balau should only be used in covered or semi-protected areas.

1x4 Red Balau outdoor flooring pricing varies by profile, grade, and board length. 1x4 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, Red Balau's 40+ 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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