Modern construction demands a lot from its materials. Structural integrity, fire safety compliance, sustainability credentials and consistent quality; ideally all in a single product, at a competitive price point, with reliable availability.
For housebuilders, offsite contractors and builders merchants across the UK, meeting all of those requirements has historically meant making compromises. WISA Spruce plywood, a premium range of engineered panels, manufactured by UPM and distributed in the UK through James Latham, is making that compromise unnecessary.
Built to perform
WISA-Spruce Special is a versatile, certified engineered timber panel made from Nordic Spruce. Lightweight yet strong, it offers the dimensional consistency and structural rigidity that modern construction projects demand. Available from 3 to 13 plies thick, WISA-Spruce Special is suitable for a wide range of loadbearing applications including floors, walls, ceilings, roofing and structural sheathing.
It’s one of the fastest-growing materials in the UK offsite construction sector, and it’s easy to see why. In an industry where quality control and repeatability are critical, WISA-Spruce Special delivers exceptional structural performance. Full compliance certification gives specifiers and procurement teams the confidence they need, while the panel’s workability makes it a practical choice on the factory floor and on site.
Fire safety built in
Where projects require enhanced fire performance, WISA-SpruceFR provides the answer. The fire retardant variant of WISASpruce Special, it achieves a Euroclass B fire rating, certified to B-s1,d0 for wall and ceiling applications and Bfl-s1 for flooring, meeting regulatory requirements for both residential and commercial use.
Critically, the fire retardant treatment does not compromise the panel’s structural or technical performance. WISA-SpruceFR performs to the same high standard as WISA-Spruce Special across all construction applications. In the context of increasingly stringent fire safety requirements in the UK, having a certified, high-performance fire retardant plywood panel that doesn’t ask you to trade structural integrity for compliance is a genuine advantage.
A strong sustainability story
Sustainability is no longer a nice-to-have in construction. It’s a requirement, written into design briefs, procurement criteria and planning conditions. WISA Spruce is well placed to meet these demands.
The panels are produced from timber sourced from sustainably certified Nordic forests and manufactured in low-emission facilities. The range uses UPM’s proprietary BioBond adhesive, a technology that replaces 50% of the fossilbased phenol in standard adhesives with lignin, timber’s own natural bonding agent. The result is a carbon footprint approximately 10% lower than a conventional panel, without any compromise on performance or appearance.
WISA-Spruce Special has also achieved top marks on the James Latham Carbon Calculator, the industry’s first digital tool to provide a cradle-to-warehouse carbon footprint for timber products. The range supports developer ambitions for LEED and BREEAM certifications too. For projects where carbon reporting has become a standard deliverable, that level of transparency and certification matters.
Consistency for offsite and MMC
The rise of modern methods of construction (MMC) has raised the bar for material specification. Offsite and modular builds depend on panels that are dimensionally consistent, fully certified and straightforward to work with at scale. WISA-Spruce Special was built with this environment in mind, and its full compliance certification directly addresses the quality control concerns common in the modular sector.
Whether fabricating wall panels, floor cassettes or roof structures, contractors can rely on WISA Spruce to perform consistently from one batch to the next. That kind of repeatability reduces waste, speeds up production and helps projects stay on programme.
Available across the UK through James Latham
WISA Spruce is stocked across James Latham’s 12 UK trading depots, with short lead times as standard. For the offsite sector, that means a well-credentialled, in-demand product that’s ready to stock and easy to supply. For larger volume requirements, a direct-from-port option is available. Backed by James Latham’s dedicated panels and specification teams, customers have access to technical expertise and hands-on support throughout the project lifecycle.
With almost 270 years of experience in the timber industry, James Latham has long-standing relationships with the best manufacturers in the world. WISA Spruce sets a new standard for sustainable, high-performance structural plywood, it meets the full demands of modern UK construction, and it’s a product that reflects exactly the kind of quality James Latham stands behind.
To find out more about WISA Spruce and WISA-SpruceFR, or to speak to a member of the James Latham panels team, visit www.lathamtimber.co.uk
