Donaldson Timber Engineering
30+ years industry excellence

Engineering
the future
of timber.

The UK's leading manufacturer of roof trusses, Posi-Joists and timber panels. Expert design. Exceptional service. Exacting standards.

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Large timber A-frame roof trusses being lifted upright in the DTE factory
30+
Years engineering timber
10
Regional branches
100%
Sustainably sourced timber
1st
To hold CCPI for trusses & joists
The range

Trusses are just the beginning

All products →
DTE joiner positioning truss timbers on the pressing bench01

Engineered system / 01

Roof Trusses

Standard, mono, attic and specialist trusses designed around your plans.

  • Spans to 16m
  • 35mm & 47mm sections
  • Attic & mono variants
  • CCPI verified
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DTE operative carrying a Posi-Joist across the production hall02

Engineered system / 02

Joists

Posi-Joist open web and I-Joist floor systems for domestic and commercial loads.

  • Posi-Joist open web
  • I-Joist 195–302mm
  • Domestic, apartment & office loads
  • Flat roof decks
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DTE joiner fixing studs into an open timber frame wall panel03

Engineered system / 03

Panels

Closed and open timber frame panels manufactured off-site to speed up your build.

  • Open & closed panel
  • Factory-fitted insulation
  • Build-sequence delivery
  • Sustainably sourced
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Instant pricing

Get an instant quote today

Configure trusses or joists, set your spans and get an indicative price before you pick up the phone.

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DTE operative running timber through a hydraulic press
Watch

Inside our factories

Donaldson Timber Engineering — company film

Donaldson Timber Engineering — manufacturing film

Why DTE

More than a supplier

01

Quality

Leading the way. Setting the standard. Raising the bar.

We never settle for “good” when we can push things further. Our reputation is built on the quality of our products and our service.

02

Experience

Big picture. Big knowledge. Small details.

Over 30 years supplying the UK construction industry, with expert technical advice from an in-house trained design team.

03

Reach

Local knowledge. National reach.

Ten regional branches mean we deliver nationally while building the local relationships that projects actually run on.

04

Family

The trusted name in timber engineering.

Part of the Donaldson Group, our heritage goes back further than anyone else in the sector — and we're still forward-thinking.

Long truss assembly line with joinery benches inside a DTE manufacturing hall
DTE operative smiling while nailing a timber component
DTE joiner setting out a timber component in the workshop
Services

From sketch to site

Design & Engineering
In-house trained designers turn a rough sketch or a full set of plans into a fully specified, regulation-compliant timber package.
Manufacturing
Continuously improved manufacturing processes across our UK sites, with quality control at every stage of the line.
Delivery
Our own fleet delivers across mainland UK, in the sequence you need it, offloaded safely on site.
Customer Support
From enquiry to after-sales, you get a named team who know your project — never a call-centre queue.
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Latest

News from the yard

June 3, 2025

DTE awarded Taylor Wimpey supplier of the year

Recognised for consistent quality and service across a national housebuilding programme.

May 14, 2025

Lauren Brister promoted to lead engineer

A step up for one of the design team's strongest technical voices.

March 6, 2025

First to achieve the CCPI mark for trusses and joists

Independent verification that our product information is clear, accurate and up to date.

Talk to a person

Ten branches. One named team on your project.

01592 715026