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5/4x4 Ipe Shiplap Siding board profile diagram
Siding

5/4x4 Ipe Shiplap Siding

This 5/4x4 Ipe siding board (Shiplap profile) offers unmatched exterior cladding longevity, backed by Ipe's 3,680 Janka hardness and a natural lifespan of up to 75+ years. The overlapping shiplap profile sheds water naturally and creates a classic, weather-resistant look for exterior cladding and accent walls. In stock and ships nationwide — order 5/4x4 Ipe siding boards 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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SKU: IPE-54X4-SHIP-SB-L1

Configure Your Order

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

Shiplap

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:1.7 lbs

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Alternative Siding Option

This same Ipe 5/4 x 4 is also available in a different siding profile:

Rainscreen

Designed for rainscreen clip systems with ventilation gap

5/4x4 Ipe Shiplap Siding — Complete Buyer's Guide

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 5/4x4 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 5/4x4 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 5/4x4 shiplap profile creates an overlapping joint with a distinctive shadow line between boards. Popular for siding, accent walls, and architectural cladding applications. 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.

5/4x4 Ipe Siding — Installation & Coverage Specs

  • Recommended joist spacing: 16"–24" on center for 5/4x4 boards (1" actual thickness)
  • Fastener placement: Secure per profile requirements, one fastener per joist minimum
  • Board weight: A 12-foot 5/4x4 Ipe board weighs approximately 20 lbs (1.68 lbs/LF)
  • Coverage: Each 12-foot 5/4x4 board covers 3.5 sq ft of siding surface (3.5" face width)
  • Pre-drilling required: Always pre-drill in Ipe — the 3,680 lbf hardness prevents direct screwing

Janka Hardness

3,680 lbf

Service Life

75+ years

Durability

Very Durable (Up to 75+ Years)

Fire Rating

Class A (0-25 flame spread)

5/4x4 Ipe Siding — Frequently Asked Questions

5/4x4 Ipe siding has an expected service life of 75+ years when properly installed and maintained. This is 3-5x longer than pressure-treated pine and 2-3x longer than cedar. Ipe achieves this exceptional longevity through its natural density (Janka hardness: 3,680 lbf) and Class 1 durability rating, which provide built-in resistance to rot, decay, insects, and fungal growth — all without chemical preservatives.

Use 305 or 316 stainless steel screws for all Ipe installations — never use galvanized or coated deck screws, which will corrode and stain the wood. Pre-drill every hole using a countersink bit sized for your screw. For 5/4x4 boards, place screws approximately 1" from each edge and 3/4" from board ends. A combination drill/driver with a clutch setting prevents over-driving into this extremely hard wood.

5/4x4 Ipe siding pricing varies by profile, grade, and board length. 5/4x4 Shiplap 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, Ipe's 75+ 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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