Fixing and buying guide

What this product is and who it is for

This is a sheet of engineered hardwood plywood manufactured with WBP adhesive, which bonds the veneer layers to resist moisture, boiling water, and prolonged damp exposure. It suits builders, contractors, and serious DIYers undertaking structural work, external cladding, flooring preparation, roof decking, and bespoke joinery. The B/BB face grading makes it cost-effective when one finished surface is required; the better B face can be positioned outward or upward for visibility.

Size, pack contents, and compatibility

Each sheet measures 2440 x 1220 mm (8ft x 4ft) and is 22mm thick. Sheets are typically supplied individually or in packs depending on order quantity. The 22mm thickness is compatible with standard timber framing, joinery, and flooring systems across UK construction. Check your project specification and structural requirements before ordering, as thickness affects load capacity and span limits.

• Sheet dimensions: 2440 x 1220 mm
• Thickness: 22 mm
• Face grading: B/BB (one better face, one utility face)
• Bonding: WBP (Weather and Boil Proof)
• Suitable for interior and exterior use where moisture resistance is required

Pre-installation checks and preparation

Before fixing, inspect sheets for damage, delamination, or warping. Store plywood flat and dry on a level surface, protected from weather and direct sunlight. Allow sheets to acclimatise to the site environment for 48 hours before installation, particularly in heated or damp spaces, to minimise movement. Check that the substrate or frame is level, square, and capable of supporting the plywood weight and intended load. Identify which face is B grade and position it appropriately for your application.

• Inspect for damage, splits, or delamination before use
• Store flat, dry, and level; protect from weather
• Allow 48-hour acclimatisation on site
• Ensure substrate is level, square, and structurally sound
• Plan fixing method and spacing according to building regulations and design specification

Fixing and installation guidance

Fixing method depends on application: flooring substrates typically use ring-shank nails or screws at 150-200mm centres; structural panels and cladding may use bolts, screws, or nails depending on frame type and load. Use corrosion-resistant fixings when exposed to weather or damp. Pre-drill screw holes to prevent splitting, especially near edges. Follow your project specification, building regulations, and structural engineer recommendations for spacing, fixing type, and load limits. For external applications, seal cut edges with appropriate sealant or paint to maintain WBP protection.

• Use corrosion-resistant fixings for external or damp applications
• Pre-drill holes to prevent splitting
• Follow project specification and building regulations for fixing spacing and type
• Seal cut edges with paint or sealant to maintain moisture protection
• Consult structural engineer or architect for load-bearing applications