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 1x6 Ipe Wood for Your Siding?
As exterior cladding, Ipe siding provides a weather-tight barrier with exceptional impact resistance. The dense grain resists dents, hail damage, and woodpecker damage far better than cedar, pine, or fiber cement alternatives. Properly installed 1x6 Ipe siding 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 1x6 rainscreen profile is engineered for open-joint cladding systems with ventilation gaps behind the boards. This modern system manages moisture while creating a striking contemporary facade. 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.
1x6 Ipe Siding — Installation & Coverage Specs
- Recommended joist spacing: 16" on center for 1x6 boards (0.75" actual thickness)
- Fastener placement: Secure per profile requirements, one fastener per joist minimum
- Board weight: A 12-foot 1x6 Ipe board weighs approximately 24 lbs (1.98 lbs/LF)
- Coverage: Each 12-foot 1x6 board covers 5.5 sq ft of siding surface (5.5" face width)
- Pre-drilling required: Always pre-drill in Ipe — the 3,680 lbf hardness prevents direct screwing
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