# WPC waterfronts and boardwalks: specify for real exposure

Canonical: https://woodplasticcomposite.net/guides/wpc-waterfront-boardwalk-marina-design/
Language: en
Updated: 2026-10-01
Version: 1
Review: Technical and language review not yet recorded

## Summary

A waterfront installation combines several exposures. Water uptake, wet grip, fastening durability and the supporting structure must be assessed together.

## The technical principle

Intermittent splash, standing water and permanent immersion are different service conditions. Wetting can affect mass, dimensions and material response, while retained water can interact with freezing. A laboratory immersion result does not automatically approve every marine use or describe the complete installed assembly.

https://woodplasticcomposite.net/guides/wpc-waterfront-boardwalk-marina-design/#technical-principle

## What to specify and verify

Define the location of boards relative to water, expected access, maintenance and any exceptional loads. Obtain relevant product evidence and a suitable fixing specification for the exposure. Consider safe cleaning access, replaceable components and how water escapes around joints and supports.

https://woodplasticcomposite.net/guides/wpc-waterfront-boardwalk-marina-design/#specification

## Application and common mistakes

Do not describe a board as universally marine-grade without a defined scope. Green Plank's published Nordic coastal references are useful starting points for project questions, not blanket approvals. Ask for the exact product, installation date, maintenance record and current condition of a comparable site.

https://woodplasticcomposite.net/guides/wpc-waterfront-boardwalk-marina-design/#application

## Discuss your project with Green Plank

For a Green Plank specification, request samples and current technical documents for the exact profile and intended application. Use the Green Plank link in Sources to explore the range and make an enquiry. Commercial disclosure: this portal features Green Plank. General material science does not certify any particular product.

https://woodplasticcomposite.net/guides/wpc-waterfront-boardwalk-marina-design/#green-plank-project

## Key points

Exposure: Splash, pooling or immersion.
Assembly: Fixings, supports and drainage.
Operation: Wet grip and maintenance access.

## Comparison

Specification check | Evidence to request
Exposure | Splash, pooling or immersion
Assembly | Fixings, supports and drainage
Operation | Wet grip and maintenance access

## Does a coastal reference approve permanent immersion?

No. The reference conditions and the proposed application must be compared explicitly.

## Sources

1. Klyosov, A. A. (2007). Wood–Plastic Composites. Chapters 11 and 12; pp. 369–411. — https://doi.org/10.1002/9780470165935
2. Green Plank — Nordic projects and case studies (manufacturer references) — https://greenplank.eu/inspiration/projects-case-studies
3. Green Plank — product information and technical enquiries — https://greenplank.eu/