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Plywood Sheets

Plywood is an engineered wood available in a variety of thicknesses and sizes. The cross grain structure of plywood sheets make them strong and resistant to cracking, warping or shrinking, so it can be used for external applications and internal. Our range of plywood sheets includes marine plywood, which is the highest grade available, as well as hardwood and birch.

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  • Plywood PRC Mixed Light Hardwood EN636-2S Class 2 FSC 25 x 1220 x 2440mm Plywood PRC Mixed Light Hardwood EN636-2S Class 2 FSC 25 x 1220 x 2440mm

    Plywood PRC Mixed Light Hardwood EN636-2S Class 2 FSC 25 x 1220 x 2440mm

    MLH (Mixed Light Hardwoods) is an internal and external plywood. It has a light sanded finish, which can be easily cut or painted and has a variety of uses. These include treated exteriors such as sheds, decking and fencing. Moist interior uses such as...
  • Plywood Hardwood EN636-2S Class 3 12 x 1220 x 2440mm Plywood Hardwood EN636-2S Class 3 12 x 1220 x 2440mm

    Plywood Hardwood EN636-2S Class 3 12 x 1220 x 2440mm

    The plywood that we stock is mixed light hardwood (MLH) and is FSC certified. It uses an EN314 Class 3 glue bond meaning that is can be used in humid interior environments, as well as covered exterior ones. However, if the ply is to be used outdoors...
  • Q Mark Plywood Hardwood EN636-3 Class 3 PEFC 2440 x 1220 x 18mm Q Mark Plywood Hardwood EN636-3 Class 3 PEFC 2440 x 1220 x 18mm

    Q Mark Plywood Hardwood EN636-3 Class 3 PEFC 2440 x 1220 x 18mm

    Q-Mark Plywood Hardwood EN636-3S Class 2 PEFC is a durable, multi-use sheet material. This plywood is intended for internal use and can occasionally withstand the risk of getting wet, such as from spillages or water leaks. Manufactured from hardwood, it...
  • Plywood Hardwood EN636-2S Class 3 15 x 1220 x 2440mm Plywood Hardwood EN636-2S Class 3 15 x 1220 x 2440mm

    Plywood Hardwood EN636-2S Class 3 15 x 1220 x 2440mm

    The plywood that we stock is mixed light hardwood (MLH) and is FSC certified. It uses an EN314 Class 3 glue bond meaning that is can be used in humid interior environments, as well as covered exterior ones. However, if the ply is to be used outdoors...
  • Marine Plywood External Use Class 3 25 x 2440 x 1220mm Marine Plywood External Use Class 3 25 x 2440 x 1220mm

    Marine Plywood External Use Class 3 25 x 2440 x 1220mm

    Marine plywood is a robust and high-quality product. To make the marine plywood sheets, the thin plies are set up perpendicularly in a plywood-making process known as cross-lamination that gives the material a lot of strength. However, heat and pressure...
  • Plywood White Oak Veneered Single Side 6 x 1220 x 2440mm Plywood White Oak Veneered Single Side 6 x 1220 x 2440mm

    Plywood White Oak Veneered Single Side 6 x 1220 x 2440mm

    This plywood has an oak veneer to give it the look of genuine wood while maintaining the benefits of plywood. It's ideal for both DIY and trade projects, and it's simple to use and cut.
  • Q Mark Plywood Hardwood EN636-3 Class 3 PEFC 2440 x 1220 x 12mm Q Mark Plywood Hardwood EN636-3 Class 3 PEFC 2440 x 1220 x 12mm

    Q Mark Plywood Hardwood EN636-3 Class 3 PEFC 2440 x 1220 x 12mm

    Q-Mark Plywood Hardwood EN636-3S Class 2 PEFC is a durable, multi-use sheet material. This plywood is intended for internal use and can occasionally withstand the risk of getting wet, such as from spillages or water leaks. Manufactured from hardwood, it...
  • Plywood White Oak Veneered Single Side 3.6 x 2440 x 1220mm Plywood White Oak Veneered Single Side 3.6 x 2440 x 1220mm

    Plywood White Oak Veneered Single Side 3.6 x 2440 x 1220mm

    This plywood has an oak veneer to give it the look of genuine wood while maintaining the benefits of plywood. It's ideal for both DIY and trade projects, and it's simple to use and cut.
  • Q Mark Plywood Hardwood EN636-3 Class 3 PEFC 2440 x 1220 x 25mm Q Mark Plywood Hardwood EN636-3 Class 3 PEFC 2440 x 1220 x 25mm

    Q Mark Plywood Hardwood EN636-3 Class 3 PEFC 2440 x 1220 x 25mm

    Q-Mark Plywood Hardwood EN636-3S Class 2 PEFC is a durable, multi-use sheet material. This plywood is intended for internal use and can occasionally withstand the risk of getting wet, such as from spillages or water leaks. Manufactured from hardwood, it...
  • Q Mark Plywood Hardwood EN636-3S Class 2 FSC 3.6 x 2440 x 1220mm Q Mark Plywood Hardwood EN636-3S Class 2 FSC 3.6 x 2440 x 1220mm

    Q Mark Plywood Hardwood EN636-3S Class 2 FSC 3.6 x 2440 x 1220mm

    Q-Mark Plywood Hardwood EN636-3S Class 2 3.6 x 2440 x 1220mm is manufactured from hardwood, making it extremely strong, perfect for constructing furniture, panelling, doors, and much more. This Q-Mark plywood is intended for internal use and can...
  • Plywood Hardwood EN636-2S Class 3 6 x 1220 x 2440mm Plywood Hardwood EN636-2S Class 3 6 x 1220 x 2440mm

    Plywood Hardwood EN636-2S Class 3 6 x 1220 x 2440mm

    The plywood that we stock is mixed light hardwood (MLH) and is FSC certified. It uses an EN314 Class 3 glue bond meaning that is can be used in humid interior environments, as well as covered exterior ones. However, if the ply is to be used outdoors...
  • Plywood Hardwood EN636-2S Class 3 25 x 1220 x 2440mm Plywood Hardwood EN636-2S Class 3 25 x 1220 x 2440mm

    Plywood Hardwood EN636-2S Class 3 25 x 1220 x 2440mm

    The plywood that we stock is mixed light hardwood (MLH) and is FSC certified. It uses an EN314 Class 3 glue bond meaning that is can be used in humid interior environments, as well as covered exterior ones. However, if the ply is to be used outdoors...
  • Plywood WBP Birch 12 x 2440 x 1220mm Plywood WBP Birch 12 x 2440 x 1220mm

    Plywood WBP Birch 12 x 2440 x 1220mm

    Latvian Birch Plywood is manufactured from birch veneers throughout, harvested from responsibly sourced forests, normally bonded together with a phenol formaldehyde adhesive, which has superior resistance to loss of bond strength with time. Birch is a...
  • Plywood WBP Birch 24 x 2440 x 1220mm Plywood WBP Birch 24 x 2440 x 1220mm

    Plywood WBP Birch 24 x 2440 x 1220mm

    Latvian Birch Plywood is manufactured from birch veneers throughout, harvested from responsibly sourced forests, normally bonded together with a phenol formaldehyde adhesive, which has superior resistance to loss of bond strength with time. Birch is a...
  • Plywood WBP Birch 6 x 2440 x 1220mm Plywood WBP Birch 6 x 2440 x 1220mm

    Plywood WBP Birch 6 x 2440 x 1220mm

    Latvian Birch Plywood is manufactured from birch veneers throughout, harvested from responsibly sourced forests, normally bonded together with a phenol formaldehyde adhesive, which has superior resistance to loss of bond strength with time. Birch is a...
  • Plywood WBP Birch 9 x 2440 x 1220mm Plywood WBP Birch 9 x 2440 x 1220mm

    Plywood WBP Birch 9 x 2440 x 1220mm

    Latvian Birch Plywood is manufactured from birch veneers throughout, harvested from responsibly sourced forests, normally bonded together with a phenol formaldehyde adhesive, which has superior resistance to loss of bond strength with time. Birch is a...
  • Q Mark Plywood Hardwood EN636-3 Class 3 PEFC 2440 x 1220 x 15mm Q Mark Plywood Hardwood EN636-3 Class 3 PEFC 2440 x 1220 x 15mm

    Q Mark Plywood Hardwood EN636-3 Class 3 PEFC 2440 x 1220 x 15mm

    Q-Mark Plywood Hardwood EN636-3S Class 2 PEFC is a durable, multi-use sheet material. This plywood is intended for internal use and can occasionally withstand the risk of getting wet, such as from spillages or water leaks. Manufactured from hardwood, it...
  • Plywood WBP Birch 18 x 2440 x 1220mm Plywood WBP Birch 18 x 2440 x 1220mm

    Plywood WBP Birch 18 x 2440 x 1220mm

    Latvian Birch Plywood is manufactured from birch veneers throughout, harvested from responsibly sourced forests, normally bonded together with a phenol formaldehyde adhesive, which has superior resistance to loss of bond strength with time. Birch is a...

Plywood

Plywood is an engineered timber closely related to MDF and chipboard, which are also used as sheet materials. It is made from thin layers of wood called veneers. These veneers are stacked with each layer rotated 90 degrees and glued together. This technique is called cross-grain and differs from solid wood, where the grain runs in one direction.

This method gives plywood several advantages:

  • High strength and stability
  • Prevents warping
  • Lower risk of splitting, especially when nails are used near the edges

What is plywood used for?

Quality plywood is a versatile, cost-effective alternative to solid wood. Thanks to the cross-grain layering, it can handle high pressure and is suitable for many uses, including:

  • Furniture
  • Flooring
  • Light partition walls
  • Doors
  • Panelling
  • Cladding
  • Sheds

Some branches offer plywood cut to size. Check your local branch page to see if this service is available.

Which plywood should be used?

At Howarth Timber & Building Supplies, we offer a wide range of plywood sheets. Choosing the right one depends on your project needs:

Internal applications: Used where moisture is not a concern. Choose plywood with EN636-1S technical class and EN314 Class 1 bond.

Typical uses include:

  • Packing cases
  • Furniture
  • Shelving

For projects where appearance matters, consider decorative plywood with natural wood grain face veneers.

External applications: Suitable for areas with occasional moisture, such as bathrooms with humidity or condensation. Use EN636-2S exterior plywood with an EN314 Class 2 bond.

Marine grade plywood is excellent here because it resists moisture, delamination, and fungal attacks. Uses include:

  • Roofing
  • Floors
  • Walls
  • Hoardings

For structural applications, like storage crates, we recommend structural plywood. For crates kept outdoors, choose plywood with EN636-3S and EN314 Class 3 bond.

What is marine plywood?

Marine grade plywood is the highest quality plywood available. It must withstand rain, snow, and regular water exposure to qualify as marine grade. But that’s not the only standard it meets.

Its main advantage is durability. Marine plywood outperforms most other plywoods outdoors. It’s used for boats, homes, and structures requiring strong moisture resistance. It has no knotholes or air pockets, making it structurally stronger.

What is a plywood sheet?

Plywood sheets are strong, versatile panels made by bonding thin layers of wood veneer. Their durability makes them ideal for construction, furniture, and DIY projects.

  • 18mm plywood sheets are perfect for structural work.
  • 3mm plywood sheets suit lightweight tasks.
  • 12mm plywood sheets offer a balance of strength and flexibility.
  • 6mm plywood sheets are often used for panelling and underlays.

Whatever your project, there’s a plywood sheet to match!

Frequently Asked Questions

What is plywood used for?
The main use of plywood is in structural applications. Plywood can naturally withstand a lot of stress and full weather exposure. Structural plywood is best used for beams and boardings, but it is commonly used in crates, bins, internal structures, outdoor furniture, and boxes.
What is marine plywood?
Marine grade plywood is essentially the highest-quality plywood you can get. It’s called “Marine grade” in part because it has to be fully capable of standing up to rain, snow, and moisture on a regular, repeated basis in order to qualify.
What is a plywood sheet?
Plywood sheets are strong, versatile panels made by bonding thin layers of wood veneer together. Their durability makes them ideal for construction, furniture, and DIY projects.

How to guides

An Ultimate Guide to Plywood

Find everything you need to know about plywood in our ultimate guide, from types and grades to practical uses and expert tips for woodworking, construction, and DIY projects. Perfect for beginners and professionals alike!

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