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Marine Plywood Sheets

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421 reviews
Rated 4.7 out of 5 stars
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Marine plywood is a hard-wearing wood for use in humid or wet areas. As standard, we offer our Marine plywood in a high-quality BB/BB grade, as this is a well-suited, exceptional sheet for humid and wet environments such as gardens, bathrooms and parks.

Please note that the colour of your marine ply may differ slightly from the images as we buy from multiple suppliers.

Buy your cut-to-size plywood from us and you’ll benefit from great customer service, fast delivery and precision cutting techniques ensuring excellent levels of accuracy.

Simply select your options below:

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mm
Min: 100mmMax: 2440mm
mm
Min: 50mmMax: 1220mm

Approximate Weight: 22.51 g

Free delivery when you spend £250+

Estimated delivery: from Check My Postcode

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Marine Grade Plywood Details

Our marine plywood sheets are built with a negligible core gap that reduces any likelihood of water getting trapped between the layers. This provides a strong and stable glue board for extra strength as it prevents expansion or rotting that could otherwise lower the integrity of the sheet.

Traditionally marine plywood sheets lend themselves for use in decorative projects in furniture such as an outdoor table, or in elements where moisture content may be of concern. 

Marine ply has a smooth surface that’s ideal for staining and lacquering but can be equally as beautiful without any finishing applications to highlight the clean, blemish-free wood. However, as our marine plywood is specialised for moisture-intense environments it does not require finishing for protection against moisture.

All of our wood sheets can be cut, allowing for various designs and finishes. The thinner sheets of ply are easy to work with and can be cut, routed and assembled easily as they’re light and easy to manoeuvre.

We provide a range of plywood sheets in a wide variety of thicknesses - hardwood plywood is a good option for furniture building; birch plywood is the most budget-friendly; if you need a lightweight or flexible sheet, go with softwood plywood.

Key Features

Versatile

We construct our Marine plywood by glueing marine veneers with a negligible gap between each veneer, creating a hardwearing sheet that is also light and malleable. Comparably, this glued plywood sheet is a lighter and cheaper alternative to pure solid wood.

Malleable

Marine ply has a smooth surface that’s ideal for painting, staining, and lacquering, but can be equally stunning without any finishing applications to highlight the clean, blemish-free wood. When used without finishing, our marine plywood is still fully capable of protection against moisture.

Water-Resistant

Built with a negligible core gap, our marine plywood sheets reduce the likelihood of water getting trapped between the layers. This provides a strong and stable glue board for extra strength as it prevents expansion or rotting that could otherwise lower the integrity of the sheet.

Inexpensive

Compared to a solid piece of water-resistant wood of the same size, our marine plywood works out as an inexpensive solution yet delivers the same desired aesthetic and properties.

Customisable

All of our marine plywood sheets are perfectly easy to machine and cut, allowing us to customise your sheet to fit any requirements that you require.

Uses & Applications

Boat Building

One of the most common uses for marine plywood is building boats of all types including yachts, sailboats, powerboats, canoes, and kayaks. Its moisture resistance makes it an ideal material for hull construction. Marine plywood can be used to fabricate the deck, cabin, and other boat components. Its strength and impact resistance are valued in boatbuilding.

Docks and Piers

Marine plywood is the preferred choice when constructing docks, piers, boardwalks, and ramps over water. The sheet piling used for docks is often made from marine plywood. It can withstand repeated wetting and drying cycles as well as contact with water without degrading. Marine plywood has the longevity needed in dock applications.

Outdoor Structures

For any outdoor structures that require moisture resistance, marine plywood is the best choice. It can be used to build outdoor cabinets, wall panels, wood decking, planter boxes, signs, and even outdoor furniture that will be exposed to the elements. Marine plywood is less prone to swelling, cracking and delaminating when used in outdoor projects.

Concrete Formwork

Concrete formwork built using marine plywood can withstand prolonged contact with concrete and the moisture from fresh concrete pour. The smooth face veneers of marine plywood make for attractive concrete finishes, and it resists deterioration better than regular plywood concrete forms.

Interiors

Inside campers, horse trailers, and motorhomes, marine plywood provides a durable surface that holds up to routine use in a damp environment. It is an ideal material for cabinetry, walls, and flooring in trailers designed for outdoor living. Marine plywood is lighter than most other water-resistant woods.

Marine Ply Board Specifications

Material Plywood
Finish Marine
Thickness 9mm12mm15mm18mm25mm
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 / 5 421 reviews
Philip Braakenburg, 22nd May
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Accurate cutting, profile as ordered. Good service.
Verified, Collected by Cut My
Perry Barrett, 22nd May
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Quality was good. Cut was to exact specification.
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Mrs Gillian Beckley, 20th May
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Well packed and exactly as I ordered
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Hugh, 18th May
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Excellent quality plywood, cut exactly to size and delivered promptly. Very happy with purchase.
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MICHAEL, 15th May
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Great quality plywood at a reasonable price. Prompt delivery. I recommend this supplier.
Verified, Collected by Cut My
Christine Straw, 11th May
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Perfect for the job in hand. Good quality. Easy to use.
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Nick Prodromou, 8th May
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High-quality, strong wood!
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Luke, 7th May
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Easy to order and quick delivery.
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Guy Farrow, 7th May
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Very accurately cut, good quality.
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David Hargreaves, 7th May
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Good to deal with - Please refer to my previous reviews
Verified, Collected by Cut My
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