Donaldson Timber Engineering Ltd

What Donaldson Timber Engineering Ltd does

Donaldson Timber Engineering Ltd (DTE) is the UK's largest and longest-established manufacturer and supplier of engineered wood products, founded in 1985 and headquartered in Buckhaven, Fife, Scotland, as a subsidiary of the James Donaldson & Sons Group (established 1860). The company designs, fabricates, and delivers precision-engineered structural timber components — principally prefabricated roof trusses (standard, attic, mono, piggyback), open web joists manufactured under licence using the MiTek Posi-Joist system (TR26 timber flanges with Posi-Strut steel webs), I-joists produced via the Metsa Wood Finnjoist system (OSB webs with Kerto LVL flanges), and prefabricated spandrel and gable panels — plus complementary items such as EGGER chipboard flooring, firring timbers, and Kerto beams. Production runs across nine to ten regional manufacturing branches covering mainland UK (Buckhaven, Cramlington, Warrington, Ilkeston, Chipping Norton, Ashford, Gamlingay, Andover, Cullompton), each equipped with modern CNC cutting and pressing equipment, supported by an in-house design office and a sales-led go-to-market model with technical sales managers embedded locally.

DTE generates revenue through the one-time sale of made-to-order engineered timber components delivered directly to construction sites, priced via per-unit quotations with an online instant quote tool for simpler configurations and bespoke engineering quotes for complex projects. Its customer base is anchored by the UK's largest national housebuilders — Taylor Wimpey (Supplier of the Year 2025), Bellway Homes, Barratt Homes, and McCarthy & Stone — alongside commercial and leisure developers (Kingspan Timber Solutions on Center Parcs Woburn Forest, Sloane Curtis on Merry Hill Shopping Centre), housing associations and social housing projects, the specialist DTECH care home division, and smaller builders and self-build customers reached through the Donaldson Direct service. The company holds first-mover regulatory credentials including the UK's first CCPI mark for bespoke trusses and joists (March 2025), ISO 9001 since 1991, and FSC and PEFC chain-of-custody certification, which together function as procurement gatekeepers in safety-conscious construction supply chains.

The business is privately held within the family-owned James Donaldson Group, operates exclusively in mainland UK, and has expanded over the past seven years through the 2018 acquisition of Cambridge Roof Truss (Gamlingay branch), a 2019 South West branch opening, ongoing branch-level capex on Hundegger saws and MiTek presses, and continued senior leadership renewal including the promotion of a dedicated Lead Engineer to head the DTECH care home vertical in May 2025.

Name

Donaldson Timber Engineering Ltd

Legal name

Donaldson Timber Engineering Ltd

Website

https://donaldsontimberengineering.co.uk

Company type

Private

Founded year

1985

Operating status

Operating

Headcount range

251–500 employees

Short description

Donaldson Timber Engineering Ltd is the UK's largest and longest-established manufacturer of engineered structural timber components, producing roof trusses, open web joists, I-joists, and panels for national housebuilders, commercial developers, care home specialists, and social housing providers through ten regional branches across mainland UK.

Ownership category

akta.pro rank

Product category

Engineered Structural Timber Components

NAICS

Engineered Wood Member Manufacturing (321215)

SIC

Millwood, Veneer, Plywood, & Structural Wood Members (2430)

akta.pro primary industry

Wood Trusses, I-Joists & Framing Components (IMADADAD)

akta.pro secondary industry

Engineered Wood Products Distribution (LVL, I-joists, Glulam, CLT) (IMAMAIAD)

Keywords

• Engineered timber products
• Roof truss manufacturing
• Structural timber components
• Open web joists
• I-joist flooring systems

Headquarters

HQ city

Buckhaven

HQ country

United Kingdom

HQ region

Europe

Offices9 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Manufactured timber products (roof trusses, joists, panels): DTE designs, manufactures, and supplies precision-engineered structural timber components including roof trusses, open web joists (Posi-Joists), I-joists, and panels. Products are made to order and delivered directly to construction sites. Revenue is generated through the sale of these manufactured products.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Donaldson Timber Engineering Ltd designs, manufactures and supplies precision-engineered structural timber components — including prefabricated roof trusses, open web joists (Posi-Joists), I-joists (Finnjoists), spandrel and gable panels, firring timbers and Kerto beams — through nine to ten UK regional branches. Products are made to order to project specifications using MiTek and Metsa Wood engineering systems, then delivered directly to construction sites for residential, commercial, leisure and care home builders.

Product overview

Donaldson Timber Engineering Ltd (DTE) is the UK's largest and longest established manufacturer of structural timber components, offering a comprehensive suite of engineered timber products. The core product portfolio includes Roof Trusses (standard, attic, mono, piggyback configurations), I-Joists (Finnjoist system using OSB webs and Kerto LVL flanges), and Open Web Joists (Posi-Joist system with steel webs). Supporting products include Panels (spandrel and gable panels), Chipboard Flooring (EGGER products), Firring Timbers, and Kerto Beams. All products are manufactured using sustainably-sourced timber and supported by in-house design services and nationwide delivery. DTE operates through ten regional branches across the UK as part of the James Donaldson Group.

Differentiator

Problem solved

Functional benefit

Brands

• DTECH (Donaldson Timber Engineering Care Homes): A specialist division of DTE focused on care home projects with higher levels of engineering, standards and complexities.

Products and services

• Roof Trusses Prefabricated structural timber roof trusses — standard, attic, mono and piggyback configurations — designed and manufactured to project specification for residential, commercial and industrial buildings, delivered direct to construction sites.
• I-Joists (Finnjoists) Structural floor and roof joists manufactured using Metsa Wood's Finnjoist system with OSB webs and Kerto LVL flanges, providing lightweight, strong and dimensionally stable engineered timber for residential and commercial floor and roof systems.
• Open Web Joists (Posi-Joists) Open web joists manufactured using the MiTek Posi-Joist system with TR26 structural graded timber flanges and Posi-Strut steel webs, allowing easy installation of plumbing and electrical services and providing longer spans than traditional timber joists.
• Panels (Spandrel and Gable) Prefabricated spandrel panels and gable panels that eliminate blockwork at gables and party walls, helping construction projects achieve wind and watertight status faster.
• Chipboard Flooring (EGGER) Structural chipboard flooring products including EGGER Protect (P5 grade chipboard with weather-resistant surface) and EGGER Peel Clean Extra (with easy-to-peel protective film), supplied as part of DTE's complete flooring solutions.
• Firring Timbers Profiled timber products designed for flat roof construction to create falls allowing rainwater runoff, with custom 3D design tailored for each project.
• Kerto Beams Engineered Kerto LVL (Laminated Veneer Lumber) beams from Metsa Wood, used to support both Posi-joists and trusses together, enabling longer spans and creating working platforms for roof installation.
• SafeWell Reusable Stairwell Protection Kit Proprietary reusable and adjustable timber stairwell protection kit developed internally by DTE, used for construction site health and safety; described as the only such reusable timber kit on the market.
• Design & Manufacturing Services In-house timber engineering design service using MiTek and Metsa Wood engineering support to transform project specifications into precise designs and quality manufactured structural timber products.
• Delivery Services Nationwide UK mainland delivery service operated through DTE's network of ten regional branches, providing scheduled and sequenced deliveries of manufactured timber products direct to construction sites.

Quantifiable outcome

• Awarded Taylor Wimpey Supplier of the Year, beating over 100 suppliers in the Taylor Wimpey supply chain
• +2 more outcomes

Named customers12 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Eleven partnerships are on record, tiered core.

• James Donaldson & Sons GroupcoreStrategic or Co-development Partner · 1 January 2024DTE is a subsidiary of the James Donaldson & Sons Group, a family-owned business established in 1860 with over 150+ years of heritage. The Group provides corporate support including HR, finance, legal, and strategic direction. DTE's privacy policy is issued by and on behalf of the James Donaldson Group.
• Kingspan Timber SolutionscoreChannel Partner/ Reseller/ Distributor · 1 January 2014Kingspan Timber Solutions was the main contractor for Center Parcs Woburn Forest project. DTE supplied 20,000 roof trusses through Kingspan for the £250 million leisure development. Tony Hutchison, commercial director of Kingspan Timber Solutions, commented on DTE's reliable supply and quality products.
• Morgan SindallcoreStrategic or Co-development Partner · 1 January 2013Morgan Sindall was the main contractor for the Kingussie Courthouse renovation project, converting a listed building into office space with an extension. DTE designed and supplied standard roof trusses while Morgan Sindall assembled glulaminated feature frames on site. Close collaboration was required to ensure designs matched for feature trusses.
• MiTekcoreTechnology or IntegrationMiTek provides software solutions for structural timber engineering and steel connector products for floor and roofing systems. DTE uses MiTek Posi-Joist systems and is supported by MiTek's in-house engineers. Co-sponsor of Fife College Design Engineer Construct programme.
• Metsa WoodcoreTechnology or IntegrationMetsa Wood provides Finnjoist products and engineering support. DTE designs all I-joist flooring systems using Metsa Wood's Finnjoists, which use OSB webs and Kerto LVL for flange material. DTE supplied Metsawood I-Joists for the Merry Hill Shopping Centre project.
• FSC (Forest Stewardship Council)coreOthersDTE is FSC certified (C015696). All products are made using legal and sustainably sourced timber. The FSC certification ensures timber comes from responsibly managed forests.
• PEFC (Programme for the Endorsement of Forest Certification)coreOthersDTE is PEFC certified (No 16-37-112) and was the first UK manufacturer of trusses to offer PEFC Chain of Custody certified products. PEFC Chain of Custody scheme ensures timber is legally and sustainably sourced.
• FinnjoistcoreTechnology or IntegrationFinnjoist is Metsa Wood's I-joist product that DTE uses for designing and cutting I-joist flooring systems. The product uses OSB for webs and Kerto LVL for flange material, creating lightweight, strong, and dimensionally stable I-joists.
• Timber Trade Federation (TTF)coreOthersAs members of the Timber Trade Federation, DTE has complied with their Responsible Purchasing Policy since 2008. Through the Responsible Purchasing Policy and PEFC systems, DTE has a due diligence system in place to cover all timber purchases.
• Construction Product Association (CPA)coreOthersThe CCPI was initiated by the Construction Product Association as a response to Dame Judith Hackitt's review of Building Regulations and Fire Safety following the Grenfell Tower tragedy. DTE was the first bespoke product manufacturer to achieve CCPI Assessed Status.
• Kerto (Metsa Wood)coreTechnology or IntegrationKerto LVL (Laminated Veneer Lumber) from Metsa Wood is used as flange material in Finnjoist I-joists. Kerto beams were also specifically used for the Bellway Homes Wimbledon project to support both Posi-joists and trusses together on a large scale. Beams were ordered from Finland and pre-cut to size.

Scale indicators7 records

Recent moves9 records

Expansion highlights6 records

Others

• MiTek Industries: MiTek provides the Posi-Joist system, software, and engineering support underpinning DTE's open-web joist offering, but also serves competing fabricators. While more an enabling/supplier relationship than a competitor, MiTek's ability to support rival manufacturers makes it a strategic ecosystem participant.
• Metsä Wood (Metsä Group): Metsä Wood supplies the Kerto LVL and Finnjoist components that DTE integrates into its I-joist floors and beams. As the upstream supplier, Metsä Wood also sells into competing roof truss and engineered joist manufacturers across the UK.
• ITW (Triforce Open Web Joist): ITW supplies metal-web open joist technology (including Triforce, formerly Gang-Nail – the same heritage as the previous employer of DTE's Andover GM). It is an enabling technology supplier competing in the open-web joist category against MiTek's Posi-Joist system used by DTE.

Direct peers

• Wolf Systems: Wolf Systems is a UK and Ireland supplier of engineered timber components and roof truss manufacturing equipment, including the easi-joist metal-web system. Direct overlap with DTE on open-web joists and roof truss design/manufacture for residential developers.
• Harlow Timber Engineering: Harlow Timber Engineering designs and manufactures roof trusses, floor joists, and spandrel panels for UK housebuilders and commercial projects, with multiple branches. Overlaps DTE on residential trusses, I-joists, and made-to-order engineered components.
• Scotts Timber Engineering (Saint-Gobain): Scotts Timber Engineering, also part of the Saint-Gobain stable, manufactures trusses, joists, and spandrel panels for UK housebuilders. Competes head-to-head with DTE for Bellway, Barratt and Taylor Wimpey contracts on similar product specifications.
• Pasquill (Saint-Gobain): Pasquill, now part of Saint-Gobain Distribution, is one of the UK's largest manufacturers of roof trusses, engineered joists, and timber frame systems. It competes directly with DTE on the same national housebuilder accounts in residential engineered timber components.

Broad incumbents

• James Jones & Sons: James Jones & Sons is one of the UK's largest sawmilling and timber engineering businesses, producing JJI-joists and roof systems alongside a broader timber products portfolio. It is a broader incumbent offering competing engineered joist and timber solutions to UK construction.
• Kingspan Timber Solutions: Kingspan Timber Solutions is part of Kingspan Group's broader offsite construction portfolio, supplying engineered timber and timber frame solutions for large commercial and leisure developments. Previously a customer of DTE on Center Parcs Woburn Forest, it competes for large leisure/commercial projects.

Emerging players

• Oregon Timber Frame: Oregon Timber Frame specialises in timber frame panels and complete offsite building systems for residential developers in the UK. While DTE supplies component trusses/joists, Oregon is moving into the higher-value integrated system sale, representing both an adjacent and partial-overlap competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/donaldsonste

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Donaldson Timber Engineering Ltd