.png?width=140&quality=70){kind=logo}
How to Install Hardwood Dock Decking
A step-by-step guide to building a dock with tropical hardwood that lasts 50+ years. Covers permits, acclimation, joist spacing, fasteners, gapping, end sealing, and maintenance.
Looking to shop for dock lumber? Visit our Dock Decking application page for species options and live pricing.
Dock Installation Quick Reference
Joist Spacing
16" OC (5/4x6)
24" OC for 2x6
Fasteners
316 Stainless
304 OK for freshwater
Board Gap
3/16" – 1/4"
For drainage & expansion
Acclimation
5–7 Days
On-site before install
Step-by-Step Dock Installation
Follow these steps for a dock that outlasts every other material on the water.
1Check Permits & Marine Regulations
Dock construction is subject to local building codes, marine regulations, and environmental permitting. Verify requirements before purchasing materials. Consult a licensed marine contractor.
2Acclimate Lumber On-Site (5–7 Days)
Let dock decking boards acclimate on-site for 5–7 days before installation. Stack them with stickers (spacers) in a covered, ventilated area near the dock to equalize moisture content. See our acclimation guide for details.
3Set Joist Spacing for Your Board Size
For 5/4x6 boards: 16" on center max. For 2x6 boards: 24" on center max. For 1x6: 16" max. Use pressure-treated joists rated for marine/ground-contact use. Ensure all joists are level.
4Pre-Drill Every Screw Hole
Tropical hardwoods are too dense for direct-drive screws. Pre-drill with a countersink bit to prevent splitting and ensure a flush, snag-free walking surface on your dock.
5Use 316 Stainless Steel Fasteners
Standard 304 stainless can corrode in saltwater environments. For any dock exposed to brackish or saltwater, 316 marine-grade stainless steel screws are mandatory. Use 304 for freshwater docks.
6Leave 3/16" to 1/4" Board Gaps
Dock decking is constantly exposed to water. Proper gapping ensures drainage, ventilation, and room for seasonal expansion — especially important in marine environments.
7Seal All End Grain Immediately
Apply end sealer (such as Anchorseal) to every cut end before installation. This prevents moisture from wicking into the end grain, which causes checking and splitting — critical for dock boards near water.
8Annual Maintenance
Clean annually with a deck cleaner. Check fasteners and structural connections. Reapply UV oil if maintaining color, or let it weather naturally to a beautiful silver-grey patina.
Common Dock Installation Mistakes
Skipping pre-drilling
Fix: Always pre-drill. Tropical hardwoods will split if you try direct-driving screws.
Using standard steel fasteners
Fix: Salt air and water corrode non-stainless fasteners within months. Use 316 SS for salt, 304 SS for fresh.
Not leaving expansion gaps
Fix: Wood moves. Leave 3/16"–1/4" gaps between boards for drainage and expansion.
Forgetting to seal end grain
Fix: Unsealed cut ends absorb water and crack. Seal every cut immediately with end sealer.
Skipping acclimation
Fix: Installing without acclimation causes excessive gaps or buckling as boards adjust to local humidity.
Incorrect joist spacing
Fix: Wider spacing than recommended causes board deflection and an unsafe walking surface.
Dock Installation FAQ
Common questions about installing hardwood dock decking.
Disclaimer: The information on this page is for general reference only. Dock construction is subject to local building codes, marine regulations, and environmental permitting. Always consult a licensed marine contractor or structural engineer before building or modifying a dock. Ipe Woods USA assumes no liability for design or construction decisions.