---
title: Plywood Backing Boards for Drylining | Trade Supply UK
description: Learn when and how to use plywood backing boards in drylining projects. Trade plywood supply available nationwide.
---

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# [Plywood Backing Boards for Drylining | Trade Supply UK](https://gointeriors.co.uk/blog/plywood-backing-boards-for-drylining-trade-supply-uk)

 Written by [GO Interiors](https://gointeriors.co.uk/blog/author/go-interiors) | 11-May-2026 04:54:15

## Plywood Backing Boards for Drylining: What You Need to Know

When specifying materials for drylining projects, plywood backing boards are often a small but essential detail.

Used within partition systems, they provide the reinforcement needed to support sanitaryware, radiators, grab rails and other wall-mounted fixtures — helping ensure long-term performance and avoiding issues post-installation.

## Why Use Plywood Backing Boards?

Plywood backing boards provide structural reinforcement within metal stud partitions, allowing fixtures to be securely fixed where plasterboard alone would not be sufficient.

Installing backing boards during first fix is standard practice on many projects and helps avoid costly remedial work later.

 

## What Thickness Plywood Is Used?

Common thicknesses for drylining backing boards include:

- **9mm** – light reinforcement applications
- **12mm** – general commercial backing
- **18mm** – heavier load-bearing requirements

Final specification should always align with project drawings and load requirements.

 

## Typical Applications

Plywood backing boards are commonly used for:

- Sanitaryware reinforcement
- Radiator and equipment fixing support
- Riser cupboards and access panels
- Boxing-in services and pipework
- Commercial washrooms and higher-use environments

 

## Do You Need Marine Plywood for Washrooms?

In higher humidity environments such as commercial washrooms, marine plywood may be specified for improved moisture resistance.

This makes it suitable for areas exposed to moisture or frequent use, where durability is important. As always, final material selection should align with project specifications.

 

## Consolidate Your Drylining Package

Rather than sourcing plywood separately, it can be added to your drylining package alongside plasterboard, metal stud and ceiling systems.

This helps to:

- Simplify procurement
- Align deliveries
- Reduce split orders
- Keep projects running smoothly on site

Explore our sheet timber range here: [https://gointeriors.co.uk/sheet-timber](https://gointeriors.co.uk/sheet-timber)

Or view our full dry lining materials range: [https://gointeriors.co.uk/drylining](https://gointeriors.co.uk/drylining)

[View full post](https://gointeriors.co.uk/blog/plywood-backing-boards-for-drylining-trade-supply-uk)

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