Autumn Sale - 5% OFF orders £50+ -

discount offer
£0.00
Configure Options
Qty: 1
Order a Sample
Show Visualiser

25mm Marine Plywood Sheets

Star Rating
Star Rating
Star Rating
Star Rating
Star Rating
889 reviews
Rated 4.7 out of 5 stars
5 stars
(746)
4 stars
(82)
3 stars
(14)
2 stars
(12)
1 star
(35)
£2.00 Inc. VAT
Order a Sample

Our 25mm marine plywood is engineered to endure in damp and humid environments. With its rugged construction, our BB/BB grade plywood provides exceptional performance for outdoor structures, boatbuilding, trailer beds, docks, and other projects exposed to moisture.

Order your plywood cut-to-size and benefit from precision cutting techniques for excellent accuracy. Our fast processing and delivery ensure you get your custom marine plywood sheets when you need it.

For marine and damp environments, choose our 25mm thickness for maximum moisture resistance and lifelong durability.

More product info

Free Delivery
Orders Over £250
Low Prices
Shop Smart & Save
mm
Min: 100mmMax: 2440mm
mm
Min: 50mmMax: 1220mm

Approximate Weight: 88.89 g

Free delivery when you spend £250+

Estimated delivery: from Check My Postcode

Collect from BN5 9XR: -

£2.00 Inc. VAT
In Stock
Autumn Sale - Get 5% Off - orders £50+
discount offer
thames valley air ambulance university of cambridge Eurostar National Trust gov uk NHS bannatyne legoland urban outfitters britvic jaguar landrover rspb
thames valley air ambulance university of cambridge Eurostar National Trust gov uk NHS bannatyne legoland urban outfitters britvic jaguar landrover rspb

Key Features

The Strength and Durability

25mm marine plywood is engineered for superior performance in humid, wet environments. The thick 25mm construction provides exceptional strength and moisture resistance, making it ideal for boatbuilding, outdoor structures, docks, trailer beds, and other heavy-duty applications.

Built to Resist Warping and Rotting

Unlike standard plywood, marine plywood retains its structural integrity when exposed to dampness over time. Its durable laminated hardwood veneers prevent swelling, cracking, and delamination.

Easy to Work With

25mm marine plywood can be cut and machined with standard power tools for DIY projects. The affordable cost provides a high-quality material without breaking your budget.

Applications

The 25mm thickness offers pronounced stability perfect for:

  • Concrete forms
  • Flooring and roofing
  • Storage sheds
  • Shelving and workbenches
  • Exterior structures

For long-lasting performance in wet environments, choose 25mm marine plywood. Be sure to seal edges when using outdoors. Contact us to order your custom-cut marine plywood today.

We also offer birch plywood, hardwood plywood and softwood plywood.

Marine Ply Board Specifications

Material Plywood
Finish Marine
Thickness 25mm
Maximum Sheet Size 2420mm x 1220mm
Minimum Sheet Size 100mm x 50mm
Plywood Grade BB/BB
Manufacturers Tolerances +/- 10 % plus 0.4mm (e.g. 5mm cast sheet could vary from 4.1mm to 5.9mm)
Cutting Tolerances +/- 1mm

Frequently Asked Questions

What thickness of plywood do I need?

When deciding on the appropriate hardwood plywood thickness, consider the specific application to ensure optimal performance.

  • For intricate crafts and hobby projects, a thinner option, such as 4mm plywood, is well-suited.
  • If you're working on cabinet backs, a 6mm plywood sheet provides the necessary stability.
  • For furniture construction and shelving projects, opt for either 9mm or 12mm plywood, depending on the specific load-bearing requirements.
  • When durability is paramount, especially in applications like flooring, subfloors, or heavy-duty uses, it is advisable to select a sturdier option such as 18mm plywood.

Is marine plywood waterproof?

Marine plywood is not waterproof, however, it has a negligible core gap so that the likelihood of water getting trapped between the layers is minimised. This provides a strong and stable glue bond for extra strength.

How is marine plywood different from regular plywood?

Compared to standard plywood, marine plywood uses higher quality wood, more layers, has a more durable adhesive, and is designed to resist delaminating and warping when exposed to moisture over time. Regular plywood is not suitable for prolonged wet conditions.

What is the best way to seal marine plywood?

Since marine plywood is typically used around or in water, you’ll need to treat every surface of the wood with sealant. You can find a good waterproof penetrating epoxy to be ideal as it works deep into the wood, dries transparent, and requires less maintenance than other types of sealant.

Do you need marine-grade plywood?

We recommend marine-grade plywood around any instance where your sheet is going to be near water.

How long does marine plywood last?

When properly maintained, marine plywood can last over 25 years even with constant water exposure. Also, proper sealing and painting helps to extend its lifespan.

Is marine plywood treated with chemicals?

No, marine plywood is not chemically treated. It achieves its water resistance through the use of durable face and core veneers, resistant adhesives, and multiple laminated layers.

Delivery depends on the size of your order

Reviews

Star Rating
Star Rating
Star Rating
Star Rating
Star Rating
4.7 / 5 889 reviews
JB, 22nd October
Star Rating
Star Rating
Star Rating
Star Rating
Star Rating
Good quality, as ordered
Verified, Collected by Cut My
Lee J Haywood, 22nd October
Star Rating
Star Rating
Star Rating
Star Rating
Star Rating
I bought 2 birch plywood panels (12mm) for use as kitchen cupboard shelves and they are perfect for the job. Good quality with a nice finish and are now loaded with cans, etc.
Verified, Collected by Cut My
Rob_w, 21st October
Star Rating
Star Rating
Star Rating
Star Rating
Star Rating
Ordered plywood cut to size in order to build a custom display for housing miniature bronze animal skulls. The wood was well finished without rough edges and were cut accurately. I aged the plywood with a wire-wool/vinegar solution before assembling then finished with linseed oil.
Verified, Collected by Cut My
Richard Baker, 19th October
Star Rating
Star Rating
Star Rating
Star Rating
Star Rating
Cut exactly to size making fitting straightforwards.
Verified, Collected by Cut My
Hilary, 18th October
Star Rating
Star Rating
Star Rating
Star Rating
Star Rating
Great product, precisely cut and good customer service, thank you!
Verified, Collected by Cut My
R Field, 18th October
Star Rating
Star Rating
Star Rating
Star Rating
Star Rating
Sheet of marine ply cut to size to raise up a cooker to surface height. All good. Treated with yacht varnish afterwards. Happy with the service.
Verified, Collected by Cut My
Erika, 15th October
Star Rating
Star Rating
Star Rating
Star Rating
Star Rating
I built a cabinet to hide my tv. I have no carpentry skills but cut my cut the pieces exactly as ordered and it looks great (I had a little help putting it together!). I couldn’t have done it without cut my’s help. Excellent service at reasonable price.
Verified, Collected by Cut My
Paul Galbraith, 14th October
Star Rating
Star Rating
Star Rating
Star Rating
Star Rating
Marine ply was perfectly smooth sanded finished, cut to exact measurements given. Would use again
Verified, Collected by Cut My
Joshua Ray, 12th October
Star Rating
Star Rating
Star Rating
Star Rating
Star Rating
The cut came out perfectly to how I wanted it :D
Verified, Collected by Cut My
robert, 11th October
Star Rating
Star Rating
Star Rating
Star Rating
Star Rating
expensive!
Verified, Collected by Cut My
Customer Services

We're Here to Help

Our Help Centre is available 24/7 to explore FAQs, discover DIY ideas and advice, and even ask our community of fellow DIY enthusiasts.