What sizes do plywood sheets come in?

Common boards are 2440×1220 mm (8×4), and Ply Direct can cut to any size you need. Thickness typically ranges from 4–30 mm depending on the material.

How much does a ply sheet cost?

Prices vary by material, thickness and dimensions. Enter your sizes on the product page for a live price or request a quote.

Can I get plywood cut to size?

Yes. Ply Direct offers accurate cutting on professional equipment for clean, splinter-free edges.

How is plywood different from MDF?

Plywood is made from cross-layered veneers for strength and improved moisture performance, while MDF is compressed fibres. Plywood is generally stronger and more moisture resistant.

25mm Marine Plywood | BS 1088 Full Board

25mm marine plywood — BS 1088 full board for the toughest, wet-area builds

Choose 25mm marine plywood when only maximum stiffness and moisture resistance will do. This This 25mm ply board is manufactured from durable hardwood veneers and bonded with waterproof adhesive to meet BS 1088 requirements. Because the core has minimal voids and strong glue lines, the sheet stays flat, cuts cleanly and holds screws exceptionally well. Therefore, it’s ideal for boatbuilding, heavy-duty floors, coastal joinery, outdoor furniture, and structural liners.

For projects that need superior load-bearing strength in damp locations, this 25mm marine ply is the go-to choice.

Key benefits

BS 1088 marine grade for proven performance in humid and wet conditions
25mm plywood thickness delivers serious rigidity for decks, floors and load-bearing panels
Smooth, sanded faces ready for varnish, paint or laminate
Low-void, dense core for crisp edges and superior screw-holding
High moisture resistance thanks to quality veneers and WBP bonding

Need parts ready to fit? Order Marine Plywood – Cut to Size.

Fitting a non-slip floor or ramp? See Buffalo Board – Full Board.

For dry-area cabinetry, compare Birch Plywood – Full Board.

Typical uses

Boat decks, bulkheads and seating where strength and water resistance are critical
Bathroom and utility floors with a suitable waterproof finish or membrane
Van and trailer decks that demand a strong, stable substrate
Outdoor and coastal projects in sheltered exposures
Worktops, benches and platforms that require extra rigidity

This 25mm marine plywood performs exceptionally well in any application where a stronger board is needed.

Working & finishing tips

First, acclimatise boards to site conditions. Next, pre-seal all edges—especially cut edges—with a compatible sealer or varnish. Then pre-drill and fix at the recommended centres, leaving small expansion gaps at walls and corners. Finally, apply a water-resistant finish; in shower or splash zones, pair the sheet with an appropriate waterproof membrane or liner.

Quick specs

Grade: BS 1088 marine plywood
Thickness: 25mm (full board; cut-to-size available)
Faces: Smooth hardwood veneers
Bonding: Waterproof (WBP) adhesive

Frequently Asked Questions

1. Is 25 mm plywood overkill for most projects?
Not when spans or loads are high. A 25mm marine ply board provides stiffness and stability that thinner sheets can’t match.

2. Can I paint or varnish it?
Yes. The faces are smooth and ready for varnish, paint or laminate—just seal edges first.

3. Is marine plywood completely waterproof?
No board is entirely “waterproof,” but BS 1088 25mm marine plywood offers excellent moisture resistance. Proper sealing and maintenance are still required.

4. Do you deliver nationwide?
Absolutely—order online for fast UK delivery. We also offer a cut-to-size service.