Plywood is one of the most widely used wood-based panels in Thailand’s construction and furniture industries. For contractors, knowing the standard plywood sizes and grades is critical to ensuring quality, cost-efficiency, and durability in projects. This guide explains the common plywood sizes Thailand, thickness options, and grade classifications to help you select the right material.

Standard Plywood Sizes in Thailand

The most common standard plywood size in Thailand is 1220mm x 2440mm (4’ x 8’). This size is widely used because it is compatible with global standards, easy to transport, and fits most construction and furniture applications.

• 4’ x 8’ (1220mm x 2440mm) – Standard universal size
• 3’ x 6’ (915mm x 1830mm) – Used in smaller furniture projects
• 5’ x 10’ (1525mm x 3050mm) – Less common, for large-scale wall paneling

Image suggestion: Standard plywood size chart Thailand
Alt: Standard plywood sizes in Thailand (1220x2440mm)

Common Thickness Options & Applications

Plywood is manufactured in various thicknesses. In Thailand, the most common options are 6mm, 12mm, and 18mm. Each serves different purposes:

• 6mm – Lightweight, ideal for ceiling panels and temporary structures.
• 12mm – Balanced thickness, suitable for furniture and wall partitions.
• 18mm – Heavy-duty, widely used in 18mm film faced plywood for concrete formwork.

Image suggestion: Plywood thickness samples 6mm, 12mm, 18mm
Alt: Plywood thickness options 6mm, 12mm, 18mm

Understanding Plywood Grades (A–D)

Plywood is classified by surface quality. In Thailand, international grading (A–D) is commonly used:

• A-Grade – Smooth surface, minimal defects, used for furniture and decorative projects.
• B-Grade – Slightly visible grain or knots, often used for painting or laminating.
• C-Grade – Noticeable patches and imperfections, suitable for non-visual applications.
• D-Grade – Lowest grade, used in subflooring, packing, or temporary structures.

How to Choose the Right Size & Grade for Your Project

When selecting plywood sizes Thailand for your project, consider:

1. Application – Furniture, flooring, wall, or formwork.
2. Durability Needs – Use higher grades and thicker panels for structural applications.
3. Moisture Exposure – In Thailand’s humid climate, WBP glue and higher grades perform better.

For concrete projects, contractors often choose wooden formwork guide to better understand how plywood interacts with formwork systems.

FAQ: Plywood Sizes & Grades in Thailand

Q1: What is the most common plywood size in Thailand?
A: 1220mm x 2440mm (4’ x 8’) is the most common and widely used.

Q2: Which thickness is best for concrete formwork?
A: 18mm film faced plywood is the contractor’s choice for durability and reusability.

Q3: Can lower-grade plywood be used in construction?
A: Yes, but only in non-structural areas. For visible or structural work, choose A or B grade plywood.