Trunk CLT is your partner for the design, engineering, supply and erection of engineered timber structures.

We are passionate about engaging with projects where 'wood' takes centre stage and have a steadily growing portfolio of CLT and glulam work.

We have the capability and the interest to deliver entire buildings, bits of buildings - or even take on sculptural or functional commissions - whatever the project demands.  


If it involves engineered timber the project would benefit from our involvement. 

We are currently delivering one-off Passivhaus projects, funky add-ons to existing buildings, Paragraph 55 schemes - as-well as schools, modular housing and other larger projects of note.

About us


Mike is a Chartered Construction Manager and Certified Passivhaus Tradesperson and has worked within the emerging low energy construction sector for many years. 

Prior to setting up Trunk he managed early explorations of Passivhaus and Zero Carbon as a director of The Olive Green Group.

Mike has picked up numerous 'eco' gongs and is a committed professional, but is probably most content behind a drum kit or playing with the kids on a Welsh beach.  

Mike founded Trunk CLT in recognition of the need for a specialist operator to cater for the scale of project that was starting to be left behind by the existing suppliers.   


Jim is a CLT and Solid Timber construction industry specialist. He has extensive experience delivering groundbreaking bespoke one off and multi-storey timber projects in London, Nationwide and abroad.


As the Operations Director he is the link between Client, Engineer, Designer and Installer.

Jim's experience as an Appointed Person for lifting Operations has proven invaluable particularly in early assessment of the feasibility of projects and suitable building methods and programming.

Jim played an active role as a Director of the UKTFA which is now The Structural Timber Association. During his time on the Board he launched the Code of Practice and was a key part of the team which created Sitesafe.

Jim Johnstone
Mike Jacob
Our wider team...

Our team is growing and consists of experienced CLT erectors, carpenters, Passivhaus Tradespeople and maybe you...?



© 2016