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FSC® & PEFC™ Certified Timber
MP Moran has held Chain of Custody certification for nearly 10 years. Certification applies to products supplied from our Watford branch - view our full certification details .

What is Plywood?

Plywood is an engineered wood panel made by gluing together thin layers of wood veneer, with the grain of each layer rotated 90 degrees to the one beneath it. This cross-grain construction gives plywood excellent strength and dimensional stability in every direction, making it far less prone to warping, splitting or shrinking than a single sheet of solid timber. It's manufactured in a range of grades, thicknesses and material types, from softwood and hardwood through to marine grade, so it can be matched to structural work, furniture making, decorative joinery or projects exposed to damp and outdoor conditions. At MP Moran, our plywood range is stocked in thicknesses from 3.6mm to 25mm, giving trade and DIY customers a panel suited to almost any job.

Plywood by Type

MP Moran is a renowned supplier of plywood, offering a robust and adaptable solution for a wide range of construction and joinery projects. Our selection of plywood is designed to meet the diverse needs of both domestic and commercial applications, ensuring that your project benefits from materials that are not only durable but also versatile. Whether you're working on structural frameworks, furniture, or decorative applications, our plywood selection offers the perfect combination of strength, flexibility, and aesthetic appeal.

What plywood do we sell online?

Our online range of plywood products at MP Moran includes a variety of options to cater to different project requirements:

  • Structural Plywood: Available in 9 items, this plywood is ideal for load-bearing applications, offering robustness and reliability.
  • Birch Plywood: With 5 items available, birch plywood is known for its fine grain and strength, making it suitable for high-quality finish applications.
  • Marine Plywood: Offering 4 items, marine plywood is specially treated for moisture resistance, perfect for outdoor or high-moisture environments.
  • Shuttering Plywood: Available in 2 items, this plywood is designed for concrete formwork and temporary structures.

When to use plywood in your projects?

Our range of plywood is no exception to this ethos, with our plywood renowned in the area as being of high quality for exceptionally good prices. Plywood is essential for:

  • Structural Applications: Ideal for construction projects where strength and stability are required, such as in roofing, flooring, and wall sheathing.
  • Furniture Making: Its versatility and range of finishes make plywood suitable for crafting various types of furniture.
  • Decorative Purposes: Plywood can be used for decorative interior applications, offering a stable base for painting, veneering, or laminating.
  • Outdoor and Moisture-Prone Environments: Marine plywood is specifically designed for use in areas where moisture resistance is crucial.

Selecting the right plywood for your project not only meets the structural requirements but also enhances the overall quality and longevity of your work.

Browse plywood at one of our local MP Moran branches

Our comprehensive online selection is ready for you to explore and order, ensuring you find exactly what you need. Alternatively, you can experience our products firsthand by visiting an MP Moran branch near you. We take pride in offering only the highest quality products and services, aiming to elevate your project with our superior plywood solutions. For a shopping experience that seamlessly blends top-notch quality, expert guidance, and utmost customer satisfaction, turn to MP Moran.

Hardwood Plywood

Choosing plywood by type means matching the panel's construction to the job it needs to do, whether that's furniture-grade strength, structural load-bearing, or long-term exposure outdoors. For structural and load-bearing work, hardwood plywood is the stronger, denser option, with tighter grain and fewer voids than softwood alternatives. It's available in a range of thicknesses to suit different projects, from 12mm hardwood plywood for cabinet carcasses and worktops through to 18mm hardwood plywood for flooring, staircases and heavier-duty builds where extra rigidity matters.

Softwood & Marine Plywood

For general construction, roofing, boxing-in and site hoarding, softwood plywood offers a more budget-friendly panel without sacrificing usability across everyday trade jobs. Where a project will face damp conditions, standing water, or permanent outdoor exposure, upgrade to hardwood marine plywood, manufactured with WBP (weather and boil proof) adhesive to resist delamination. Our hardwood marine plywood boards are a popular choice for boat repairs, garden structures and bathroom substrates, giving you a panel built to hold up where standard plywood would fail.

Plywood by Size

Filtering plywood by size helps you pick the right sheet for the load, span, and finish your project demands, since thickness directly affects both strength and cost. For lightweight jobs such as drawer bases, model making and backing panels, thinner sheets like 3.6mm plywood and 5.5mm plywood offer flexibility without unnecessary bulk. Moving up, 6mm plywood sheets and 9mm plywood are common choices for wall linings, cupboard backs and lightweight furniture panels where a bit more rigidity is needed.

For structural and load-bearing applications, thicker sheets are essential. 12mm plywood and 15mm plywood suit flooring underlay, shelving and mid-weight construction work, while 18mm plywood is a trade favourite for worktops, staircases and furniture carcasses that need to carry real weight. At the top end, 25mm plywood delivers maximum rigidity for heavy-duty structural builds and site applications where deflection under load isn't an option. All sizes are cut and stocked ready for trade and DIY collection or delivery.

Plywood by Material

Filtering plywood by material helps you match the sheet to the conditions your project will face, whether that's interior use, decorative work, structural builds or exposure to moisture. If you need an all-round option for general DIY, standard plywood boards are the most versatile choice, available in a wide range of thicknesses suitable for furniture carcasses, boxing-in, wall linings and internal joinery. For projects where a premium finish is important, birch plywood is a favourite thanks to its smooth edges, attractive grain and superior strength, or opt for a thicker format such as 18mm birch plywood for shelves, furniture frames and decorative installations, especially popular among makers and DIY enthusiasts seeking a crisp, clean aesthetic.

If your project involves outdoor areas, damp environments or high-humidity zones, marine options ensure long-term reliability thanks to enhanced moisture resistance, suiting bathrooms, utility rooms, garden structures and external cladding. Begin with marine plywood sheets or choose specific sizes such as 6mm marine plywood or 12mm marine plywood when added rigidity is needed outdoors. For a 9mm option, our full marine ply range is the place to check current stock. Whatever your requirements, from smooth decorative panels to heavy-duty, weatherproof timber boards, browsing plywood by material makes it easy to find the right sheet for lasting, reliable results.

Plywood FAQs

What are the three types of plywood?

The three main types of plywood are softwood plywood, hardwood plywood, and marine plywood, each suited to different applications. Softwood plywood is the most affordable option and works well for general construction, roofing, and site hoarding. Hardwood plywood uses denser veneers, such as birch, giving it superior strength and a smoother finish for furniture, cabinetry, and decorative joinery. Marine plywood is manufactured with waterproof WBP adhesive and void-free core veneers, making it the right choice for boat building, bathrooms, and any project exposed to consistent moisture. MP Moran stocks all three types across thicknesses from 3.6mm to 25mm.

Is plywood waterproof?

Standard plywood is not waterproof, though most grades are moisture resistant and can withstand occasional damp conditions without failing. Only marine plywood, bonded with WBP (weather and boil proof) adhesive, is designed to resist prolonged exposure to water and humidity. For outdoor projects such as garden structures, cladding, or boat repairs, marine plywood is the correct choice rather than standard softwood or hardwood sheets. Even marine-grade plywood benefits from a protective coating or sealant on cut edges and exposed faces to extend its working life. MP Moran's marine plywood range covers 6mm, 12mm, 18mm and 25mm thicknesses for outdoor and high-moisture applications.

Is 4-ply plywood stronger than 3-ply plywood?

Yes, plywood with more plies is generally stronger and more dimensionally stable, because each additional layer increases the number of grain-direction changes across the panel. This cross-lamination better resists twisting, warping, and splitting along the grain compared to panels with fewer layers. In thin sheets, such as 3.6mm to 6mm plywood, ply count matters more, since thinner panels rely on layer construction for rigidity rather than raw thickness. For structural applications, thicker sheets such as 12mm plywood boards or 18mm plywood boards typically use more plies again, giving the panel its load-bearing strength. Higher ply counts do usually add cost, so the right choice depends on whether the project prioritises strength or budget.

What's stronger, MDF or plywood?

Plywood is generally stronger than MDF because its cross-laminated veneer construction gives it far greater resistance to bending, splitting, and screw pull-out. MDF is made from compressed wood fibres and resin, so while it offers a smooth, uniform surface ideal for painting, it lacks plywood's structural rigidity and is more prone to sagging under load. Plywood also holds screws and fixings more securely along its edges, making it the better option for shelving, flooring, and load-bearing applications. MDF remains a popular choice for cabinetry fronts and decorative work where a flawless paint finish matters more than raw strength. For structural or load-bearing builds, hardwood ply or softwood ply is the stronger choice over MDF.

What is the lifespan of plywood?

Correctly installed and maintained, plywood can last several decades. Indoor plywood used in furniture, flooring, or joinery typically lasts 20 to 30 years or more, since it's protected from moisture and UV exposure. Exterior plywood, even marine grade, has a shorter working life, typically 15 to 25 years, depending on exposure levels and how well it's sealed and maintained. Regular sealing, painting, and keeping sheets off direct ground contact all extend service life significantly. MP Moran stocks WBP marine-grade plywood for projects that need to withstand years of outdoor exposure.

What thickness of plywood should I use for shelving?

For most domestic shelving, 18mm plywood boards are the standard choice, giving enough rigidity to carry books, kitchenware or storage boxes without sagging over a typical 600-900mm span. 12mm plywood boards can work for lighter-duty shelving or shorter spans, such as airing cupboards or wardrobe internals, but will flex more under heavy or unevenly distributed loads. For long unsupported spans or heavier loads such as garage or workshop shelving, stepping up to 18mm or adding a mid-span support bracket is the safer option. As a rule of thumb, the longer the shelf span, the thicker the board or the more support brackets it needs.

Is marine plywood worth it for outdoor projects?

Yes, for any project with sustained exposure to moisture, marine plywood is worth the extra cost over standard sheet material. Unlike softwood or hardwood plywood, marine ply is manufactured with WBP (weather and boil proof) adhesive and void-free veneers, so it resists delamination and rot far longer when left outdoors or exposed to standing water. Standard plywood used outdoors without this protection will typically start to swell, warp or delaminate within a season or two, leading to costly replacement. For garden structures, boat repairs, external cladding or bathroom substrates, the higher upfront price of marine plywood is generally offset by significantly longer service life and fewer repairs.

What's the difference between hardwood and softwood plywood?

Hardwood ply is made from denser veneers, giving it greater strength, better screw-holding and a smoother finish, making it the better choice for furniture, cabinetry, staircases and load-bearing applications. Softwood ply uses lighter, less dense veneers, so it's more affordable and easier to work with, but generally less rigid and less suited to heavy structural loads. Softwood ply is a good fit for general construction, roofing, boxing-in and site hoarding, where cost and ease of handling matter more than maximum strength. Hardwood ply costs more but pays off on projects where durability, a fine finish or structural performance are priorities.

What size are standard plywood sheets?

The most common plywood sheet size in the UK is 2440x1220mm (8' x 4'), the standard full sheet used across most construction, furniture and general joinery projects. A narrower 2440x600mm (8' x 2') format is also available, typically as a tongue and grooved board suited to flooring and narrower structural applications. Most other thicknesses and material types are stocked in the full 2440x1220mm sheet, with cutting available in-branch if you need a specific size for your project.

What are the grades of plywood, and which grade should I use?

Plywood is graded by the quality of its face veneers, typically ranging from A grade, which is smooth, sanded and largely free of knots, through to C or D grade, which may include patches, knots and visible repairs. Higher grades cost more and suit visible, decorative work such as furniture fronts or shelving where appearance matters, while lower grades are perfectly serviceable for structural, hidden or site applications such as shuttering and hoarding. Marine plywood is graded separately again, since it's assessed on core quality and void-free construction as much as face appearance, reflecting its role in moisture-critical builds. For most trade and DIY jobs where the plywood won't be seen, a mid or lower grade softwood plywood offers the best value, while visible or fine joinery work justifies stepping up to a higher-grade birch plywood.

Can plywood be painted?

Yes, plywood can be painted, and it's a common way to protect the surface and improve its appearance for furniture, cabinetry and interior joinery. For the best finish, lightly sand the face veneer first to remove any raised grain, then apply a primer suited to bare wood before adding your topcoat, since plywood's face grain can telegraph through paint if left unsealed. Birch-faced plywood takes paint particularly well thanks to its smooth, tight grain, making it a popular choice for painted furniture and shelving. If the plywood will be used outdoors or in a damp area, painting alone won't waterproof the panel, so marine plywood with a suitable exterior paint or sealant is the more reliable option for long-term protection.

What is plywood made of?

Plywood is made from thin sheets of wood veneer, known as plies, bonded together with adhesive under heat and pressure. Each layer is laid with its grain running at 90 degrees to the layer beneath it, a technique called cross-lamination, which spreads strength evenly across the panel and reduces the natural tendency of solid wood to shrink, swell or split along the grain. The type of timber used for the veneers, along with the adhesive, determines the plywood's category, from softwood and hardwood species such as birch through to WBP-bonded marine plywood, which uses a weather and boil proof glue for extra durability. This layered construction is what gives plywood its strength-to-weight advantage over a single sheet of solid timber.

What are the disadvantages of plywood?

While plywood is a versatile and durable material, it does have some limitations worth considering. Standard plywood is not fully waterproof, so it can swell, delaminate or warp if left exposed to sustained moisture unless a marine grade is used. Cut edges are more porous than the face veneer and can absorb moisture more readily, so edges often need sealing or banding on projects exposed to damp. Higher grades and hardwood plywood also carry a higher price than basic sheet materials such as OSB or chipboard, and the visible face grain can require extra sanding or filling for a fully smooth painted finish. Choosing the right type and grade for the application, such as marine plywood for damp environments, addresses most of these drawbacks.

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