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Split your purchase of £25.00 into 4 with no sign-up fees or late fees. Your purchase will be split into 4 payments, payable every 2 weeks
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second payment
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third payment
£6.25
fourth payment
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Choose Clearpay at checkout to pay later with Pay in 4.
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Remaining payments are taken automatically.
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Clearpay lends you a fixed amount of credit so you can pay for your purchase over 4 instalments, due every 2 weeks. Ensure you can make repayments on time. You must be 18+ and a permanent UK resident (excl Channel Islands). Clearpay charges a £6 late fee for each late instalment and a further £6 if it’s still unpaid 7 days later. Late fees are capped at £6 for orders under £24 and the lower of £24 or 25% of the order value for orders over £24. Missed payments may affect your ability to use Clearpay in the future and your details may be passed onto a debt collection agency working on Clearpay’s behalf. Clearpay is credit that is not regulated by the Financial Conduct Authority. T&Cs and other eligibility criteria apply at clearpay.co.uk/terms
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Key Features
{{home}} Use in walls, floors & roofs
{{verified_user}} Suitable for humid conditions when sealed
{{fitness_center}} Resists warping and bending
{{wb_shade}} Intended for interior or covered use
Technical Specification
Technical Specification
URN:
4002010
Product:
Hardwood
Application:
Floors, roofs, walls
Indoor/Outdoor Usage:
Exterior (if treated), Interior
Material Type:
Hardwood
Thickness:
18mm
Width:
1220mm
Length:
2440mm
Weight:
22kg
Sales Unit:
Sheet
Sales Unit Coverage:
2.98m2
Moisture Resistant:
No
Grade:
BB / CC
Wood Species:
Poplar
Treatment Type:
Untreated
Facing:
Hardwood
Edge:
Square
Bond Class:
BS EN636-2 (Class 2)
Colour:
Natural
Finish:
Veneer
Formaldehyde Level:
E1 (low)
Country of Origin:
China
Product Overview
Structural hardwood plywood board, measuring 2440mm x 1220mm (8' x 4') with an 18mm thickness.
Made from cross-laminated hardwood veneers, kiln-dried and bonded with moisture-resistant adhesive, classified to EN636-2 (suitable for humid interiors or sheltered exteriors when sealed), it provides high strength, stability, and impact resistance.
Widely used for floors, roofs, walls, and heavy-duty joinery, the smooth hardwood face is pre-sanded, allowing for painting, staining, or clear finishing where appearance matters.
Features & Benefits
Cross-grained veneer construction: Alternating layers distribute weight evenly, reduce warping, and improve strength in tension and compression.
Humidity-Stable Bond: Meets EN636-2 standards for humid environments. While the adhesive is moisture-resistant, the wood requires a protective coating to prevent rot and water damage if used in wet areas or outdoors.
Hardwood face veneers: Smooth, sanded surface can be painted, stained, or clear finished for decorative use.
Durability: Designed to resist bending and surface distortion under load.
Strength-to-weight ratio: Provides reliable performance in demanding flooring, decking, and roofing applications.
Standard sheet size (2440mm x 1220mm): Compatible with common framing centres, easy to cut, and minimises waste.
Thickness 18mm: Heavy-duty panel suited to structural and joinery applications.
Please Note: Colour and finish are representative only and may vary slightly as this is a natural product.
Applications
Flooring: Functions as a structural subfloor when installed across joists spaced at appropriate industry-standard intervals.
Heavy-duty workbenches: Provides a high-strength, impact-resistant surface suitable for intensive workshop environments.
Furniture frames: Used for primary carcass construction in heavy-duty wardrobes, tables, and large storage units.
Roof decking: Suitable for flat or pitched roof decks on outbuildings when the span is correctly matched to the board thickness.
Kitchen worktop substrate: The high-strength 18mm core provides a stable, load-bearing base for laminate or stone surfaces across standard 600mm cabinet spans. For more on why this material is the industry standard for kitchen worktop substrates, see our technical guide on managing deflection and moisture resistance.
Workshop bench tops: Denser hardwood face veneers offer increased resistance to impact and tool abrasion for professional work surfaces.
Stage and platform construction: Certified structural rating ensures compliance with building regulations for temporary flooring and exhibition staging.
Installation Guidance
Seal all edges and cut faces: Prevents moisture ingress and extends service life.
Use appropriate fixings: Stainless steel or galvanised fasteners recommended for structural applications.
Fit in controlled conditions: Intended for interior or covered use; for permanent exterior exposure, use marine-grade plywood.
Compliance & Performance
Service class: EN636-2, suitable for humid interiors or exterior use when treated and sealed.
Classification note: Formerly referred to as WBP plywood; superseded by EN314 (bonding quality - glue line performance in dry, humid, or exterior conditions) and EN636 (service class - dry, humid, exterior).
What Customers Are Saying
Buyers highlight the quality and value of this 18mm hardwood plywood, with customers using it for projects ranging from shed builds to general joinery. One reviewer who purchased 20 sheets reported all arriving in excellent condition, noting they chose this over the more expensive marine plywood option and were pleased with the result. The competitive pricing is a common theme, alongside the smooth finish that makes it ready for painting or staining straight out of the packaging.
Summarised by AI from customer reviews.
Delivery & Returns Information
Delivery charges vary by product category and order value. Items may ship from different suppliers and arrive separately, so delivery charges can be shown per part of your order at checkout.
Standard (Nationwide) Delivery
Core Products
Core
ORDER VALUE
DELIVERY CHARGE
Under £250
ex. VAT
£25
ex. VAT
Over £250
ex. VAT
FREE
Core Delivery is our most competitive delivery fee. To qualify for Core Delivery, all the products in your basket need to be from our Core range. Core products have the Core icon next to their picture.
Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products
ORDER VALUE
DELIVERY CHARGE
Under
£300
£30
ex. VAT
Over
£300
ex. VAT
FREE
Express Delivery
Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products
We work with a nationwide network of trusted suppliers. Items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you will see delivery charges shown at checkout for each part of your order. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery areas
Delivery charges apply to mainland UK, excluding: AB, CA, CF, DD, DG, EH, EX, FK, KA, KW, KY, IV, LA, LD, LL, ML, NP, PA, PH, PL, SA, SY, TR, TQ and TD.
If your address is in one of these areas, we will contact you before processing your order to confirm any additional costs. We do not currently offer delivery outside the UK mainland.
What to expect on delivery day
Deliveries are typically kerbside.
Please ensure someone is on-site to accept delivery. For heavier items, help with offloading may be required.
Many building materials arrive on large vehicles. If access is restricted, a specialist vehicle such as a HIAB may be required and could incur an additional charge.
Why delivery can cost more than typical parcel delivery
Building materials often travel on larger vehicles and usually carry fewer drops per run than parcel networks. That is why delivery charges can be higher than standard e-commerce shipping.
Returns
Returns depend on what you have bought and whether there is anything wrong with it. For full details on eligibility, timeframes, and exclusions, please see our full policy.
What's the difference between structural and exterior plywood?
The primary difference between structural and exterior plywood lies in the environment the wood is designed to survive in, specifically regarding moisture levels and biological attack (like rot or fungus).
-Structural Hardwood Plywood: Rated for load-bearing. It has a certified strength and few internal gaps, ensuring it won't snap or sag under weight.
-Exterior Class 3 Plywood: Rated for weathering. It uses waterproof glue (Phenolic resin) that won't peel apart even when soaked.
Is 18mm plywood load bearing?
Yes, this a load bearing plywood.
Can I screw directly into this plywood?
You can certainly screw directly into structural hardwood plywood, but because plywood is made of alternating layers (plies) of wood glued together, it behaves differently than solid timber.
A few tips:
- Drill a pilot hole
- Screw into the face only and not the edges
- Use wood screws or course thread screws
Learn more
Learn more
Learn more
