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25mm Marine Plywood Sheets

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1167 reviews
Rated 4.7 out of 5 stars
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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.

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All sizes in millimetres (mm) Dimensions Need help?
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Min: 100mmMax: 2440mm
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Min: 50mmMax: 1220mm

Your cut: 100 × 50 mm (10 × 5 cm)

Roughly the size of a bank card.

Approximate Weight: 88.89 g

Free delivery when you spend £250+

Estimated delivery: from Check My Postcode

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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

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4.7 / 5 • 1167 reviews
Andrew, 14th October
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Really good finish to the wood. Cut spot on to size, clean cut edges.
Verified, Collected by Cut My
HK, 13th October
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Ah it's great, perfect, exactly what I needed. SO useful. Will absolutely be using again - I don't have a car so it's less easy for me to go to a big DIY place for getting this kind of thing done, this is just exactly what I need. Overnight delivery so I had it the very next day.
Verified, Collected by Cut My
Mr John Christiansen, 11th October
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I only ordered a plywood shelf that was cut to size and was so happy that it fitted perfectly. I bought it as a trial to see how accurately it was cut as I need to order some more which I will now definitely be ordering.
Verified, Collected by Cut My
Richard Felton, 7th October
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Clean cut and well pacjaged
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Gregg Arthur, 4th October
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Excellent work and great quality timber
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Stephen Kingham, 4th October
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Good. Packed well.
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Mr W, 1st October
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Good quality cut, measured to size - just right!
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niki, 30th September
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brilliant, exactly what we wanted and fast service
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Viktorija, 28th September
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Scammers. Listing in mm instead of cm as most conpanies. Bought a sample f9r almost £40 and they did not resolve nor accepted return (even if it fits via letterbox)
Verified, Collected by Cut My
ANTHONY MARCH, 28th September
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The piece that I had cut to size was Brilliant in both accuracy and quality. Would Highly recommend. Anthony March
Verified, Collected by Cut My
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