18mm Class 3 Hardwood Ply

18mm Class 3 Hardwood Plywood

Class 3 Hardwood Plywood is a high-quality, moisture-resistant, and dimensionally stable plywood panel engineered to perform under demanding conditions. Manufactured from sustainably sourced hardwood veneers and bonded with durable phenolic resin adhesive, this plywood meets the requirements for EN 636-3 (Exterior grade) classification making it ideal for use in humid and exterior environments where exposure to moisture and temperature variations is expected.

Product Features

• EN 636-3 Certified meaning it is classified for exterior and humid conditions
• Constructed from durable hardwood veneers for superior strength and resistance to impact.
• Waterproof adhesive ensures long-term bond integrity even under moisture exposure.
• Sanded on both sides for easy finishing, painting, veneering, or laminating.
• Engineered for minimal expansion, warping, or delamination.
• Manufactured using legally and responsibly sourced hardwood available with FSC or PEFC certification.
• Calibrated thickness for consistent performance in structural and decorative applications.

Product Benefits

• Long lasting durability withstands weathering, moisture, and high mechanical stress.
• Suitable for both structural and non-structural purposes in interior and exterior settings.
• Maintains shape and strength even in fluctuating humidity and temperature.
• High resistance to rot, fungal attack, and delamination extends lifespan and reduces maintenance costs.
• Smooth, uniform faces allow for a professional finish with paints, stains, or laminates.

Applications and Versatility

Class 3 Hardwood Plywood is designed for demanding environments across construction, furniture, and industrial sectors. Common uses include;

• Cladding, soffits, fascia boards, and external wall panels.
• High-humidity areas such as kitchens, bathrooms, and laundry rooms.
• Cabinets, shelving, worktops, and furniture frames.
• Caravan interiors, truck bodies, boat interiors, and decking substrates.
• Base material for underlays, structural flooring, or roof sheathing in exposed environments.
• Durable crates, pallets, and transport containers requiring moisture resistance.

Features & Benefits List:

• Stocked thicknesses are 12mm and 18mm but 4-25mm is available to order in as a special
• Finish size of the sheet is 2440mm x 1220mm
• Phenol Formaldehyde (WBP – Weather & Boil Proof) adhesive system.
• Can be painted, stained, laminated, or veneered.
• Store flat in dry, well-ventilated areas, avoid direct contact with ground or water before installation.

Additional Information:

We offer convenient and flexible delivery options to suit every project:

Van delivery for smaller orders - HIAB crane lorry for larger or bulk deliveries - Site delivery available on request

If you need delivery before the estimated date, please contact us and we’ll do our best to arrange an earlier slot.

For more information, please contact either

Oldham on 0161 633 1264

Agecroft on 0161 383 6400

Rochdale on 01706 656 980

Or email us at [email protected]