ThruFlow Legacy XP Dock Decking Panels

ThruFlow Legacy XP dock decking panels provide one of the most durable, environmentally friendly, and maintenance-free dock decking solutions available for docks, piers, marinas, and waterfront walkways.

Manufactured using advanced bonding technology and fiberglass reinforced polypropylene (FRPP), Legacy XP panels deliver exceptional strength while remaining lightweight and comfortable underfoot.

The open-grid architecture allows water, wind, and debris to pass through the decking surface while allowing 43% of sunlight to penetrate below the dock. This reduces environmental impact on aquatic vegetation and helps minimize uplift caused by waves, storm surge, and strong winds.

ThruFlow panels are widely used as replacement dock decking panels for residential docks, marina walkways, and waterfront boardwalks—making them a popular plastic dock decking replacement for traditional wood dock boards.

Legacy XP panels are also compatible with original ThruFlow Legacy panels, making them ideal for dock repairs, dock resurfacing projects, and new dock construction.

AVAILABLE PURCHASE OPTIONS

ThruFlow Legacy XP panels are available as single panels or discounted bundle packs depending on the size of your project.

• Single Panels – Ideal for repairs or small dock sections
• 10 Panel Bundles – Great for partial dock resurfacing
• 70 Panel Bundles – Popular quantity for full dock decking projects
• 140 Panel Bundles – Ideal for large docks and marina installations

Bundle packs often provide better pricing and freight efficiency for larger dock projects.

Coverage Guide: A standard 48" x 12" panel covers approximately 4 sq ft. A 70-panel bundle covers approximately 280 sq ft of dock surface (before waste/cuts).

WHY CHOOSE THRUFLOW DECKING?

• Stronger and longer-lasting than traditional wood dock boards
• No rot, splinters, staining, or annual maintenance
• Open-grid design allows water and wind to pass through the dock surface
• Environmentally friendly design that helps protect vegetation below the dock
• Comfortable, barefoot-friendly walking surface with excellent traction

KEY FEATURES

• Constructed from fiberglass reinforced virgin polypropylene
• Maintenance-free dock decking
• 360° engineered non-slip walking surface
• Allows 43% sunlight penetration below the dock
• Lightweight design – approximately 1.6 lbs per sq ft
• UV stabilized for long-term outdoor exposure
• No splinters, rot, mold, or algae buildup
• Helps reduce wind and storm uplift forces
• Lifetime limited manufacturer warranty

PANEL DESIGN

Legacy XP panels feature an interlocking tab design that allows each panel to connect seamlessly to the next, creating a clean and uniform dock surface.

The XP design includes elongated screw holes which provide greater flexibility during installation and make it easier to align panels with dock framing members. This is especially helpful when installing on existing docks where framing may have shifted or warped over time.

The open-grid decking surface allows water and wind to pass through the structure, helping docks better withstand extreme weather conditions.

AVAILABLE PANEL SIZES

• 36" x 12" Panel (1' x 3')
• 48" x 12" Panel (1' x 4')
• 60" x 12" Panel (1' x 5')

Multiple panel sizes allow dock builders to design layouts that fit various dock frame configurations.

PANEL SPECIFICATIONS

• Material: Fiberglass Reinforced Polypropylene (FRPP)
• Panel Thickness: 1.2"
• Surface Type: 360° Non-Slip Surface
• Light Penetration: 43%
• Weight: approximately 1.6 lbs per sq ft
• Warranty: Lifetime Limited Warranty

RECOMMENDED SUPPORT SPACING

• 36" Panel: 18" framing centers
• 48" Panel: 16" or 24" framing centers
• 60" Panel: 15" framing centers

AVAILABLE COLORS

Standard Colors

• Light Gray
• Maple

Premium Colors

• Ipe
• Seafoam
• Slate
• Walnut

Note: Premium colors are considered special order items and require a minimum order quantity of 70 panels.

RECOMMENDED FASTENERS

ThruFlow recommends a high-quality #10 or #12 stainless steel pan-head screw approximately 2.5" long.

Fasteners should pass through the panel and secure into the dock framing structure. Screws should not be fully tightened to allow for natural expansion and contraction.

The standard 48" panel uses 8 fasteners per panel on 16" centers.

Compatible stainless steel dock decking screws are available separately.

COMMON APPLICATIONS

• Boat docks
• Marina walkways
• Residential waterfront docks
• Dock resurfacing projects
• Commercial marina decking
• Boardwalks and waterfront pathways

DOCK DECKING COVERAGE CALCULATOR

Use the quick guide below to estimate how many ThruFlow Legacy XP panels you’ll need for your dock, pier, or walkway. Simply calculate your total dock surface area (Length × Width) and match it to the panel size you plan to use.

Step 1: Measure your dock surface area in feet (Length × Width = Total Square Feet)

Step 2: Divide by the coverage per panel (below) to estimate panel quantity

Step 3: Add 5–10% extra panels for waste, cuts, and end finishing

Coverage Per Panel

• 36" x 12" panel (1' x 3'): Covers 3 sq ft per panel
• 48" x 12" panel (1' x 4'): Covers 4 sq ft per panel
• 60" x 12" panel (1' x 5'): Covers 5 sq ft per panel

Quick Estimator Examples

• 4' x 20' dock walkway = 80 sq ft
  Using 48" x 12" panels (4 sq ft each): 80 ÷ 4 = 20 panels (recommend ordering 22 panels with 10% extra)
• 6' x 24' dock section = 144 sq ft
  Using 48" x 12" panels (4 sq ft each): 144 ÷ 4 = 36 panels (recommend ordering 38–40 panels)
• 4' x 40' walkway = 160 sq ft
  Using 60" x 12" panels (5 sq ft each): 160 ÷ 5 = 32 panels (recommend ordering 34–36 panels)

Bundle Pack Planning

• 10-Pack: Best for small repairs and partial resurfacing
• 70-Pack: Ideal for many full dock resurfacing projects (also meets premium color minimum)
• 140-Pack: Best for large docks, multi-slip systems, and marina projects

Need help estimating your quantities? Contact us with your dock dimensions and panel size preference and we’ll help you build a material list.

ADVANCED BUYER GUIDE: DOCK DECKING COMPARISON CHART

Most dock decking options look similar online, but they perform very differently over time. Use the chart below to compare ThruFlow vs wood dock boards vs aluminum dock decking for traction, maintenance, storm performance, and long-term value.

Tip: If you’re replacing wood dock boards and want a long-term solution with better traction and no annual maintenance, ThruFlow is often the best upgrade.

SHIPPING INFORMATION

ThruFlow Legacy XP dock decking panels ship either by UPS / parcel carrier or LTL freight carriers depending on the quantity ordered.

• Single Panels & Small Orders – Typically ship via UPS or similar parcel carrier.
• Bundle Packs & Larger Orders – Ship via palletized LTL freight carriers.
• 70 Panel & 140 Panel Bundles – Almost always ship via freight carrier due to weight and pallet size.

FREIGHT DELIVERY DETAILS

• Residential Deliveries: Freight shipments to residential addresses will include liftgate service so the pallet can be safely lowered to the ground at delivery.
• Commercial Deliveries: Commercial locations must have a forklift or loading dock available to unload the shipment. Liftgate service is typically not included for commercial deliveries.
• Commercial delivery addresses must be located in a commercially zoned area. Locations that are considered residential by the freight carrier may require residential delivery service.
• Someone must be present to receive and sign for all freight deliveries.
• Please inspect shipments for visible damage before signing the delivery receipt.

Need help with shipping? In most cases, freight costs can be calculated directly on our website. Simply add the panels you need to your shopping cart and enter your shipping zip code on the cart page to view available shipping options and estimated freight costs. Larger orders often reduce the shipping cost per panel due to palletized freight efficiencies.