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Ecological Building Systems

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Virtual Insulating and Achieving Airtightness with Cross Laminated Timber (CLT)

Cross Laminated Timber (CLT) construction has seen a vast increase in popularity in recent years and is proving a welcome shift from energy intensive traditional construction such as masonry and steel.  UK projects are diverse from multi-storey residential buildings in London to affordable housing projects on the Isle of Mull.

Focussing on optimisation of design and on-site delivery of truly high-performance mass timber constructions, this CPD brings together expertise in natural wood fibre insulation as well as intelligent airtightness and windtightness solutions with specialist fixings systems.

CLT wall build up with wood fibre

Request CPD at a date that is convenient for you and your team.

Ideal for

  • Architects
  • Specifiers
  • Building Surveyors
  • Contractors
  • Consultants (Energy, Passivhaus)
  • Students
  • Anyone interested in sustainable, energy efficient building

Key learning

  • The future of the built environment
  • The environmental credentials of CLT
  • High performance mass timber construction
  • Optimal design & on-site delivery
  • Benefits of wood fibre insulation
  • Airtightness and windtightness solutions
  • Detailing and critical junctions
  • Specialist fixing details for CLT


Who it is for

This training is aimed at professionals from all disciplines of the building design and construction industry who are interested in using natural and sustainable materials to insulation high performance CLT constructions.

What you learn

We will look at reasons for using wood, consider the future of the built environment, the potential of this natural resource and our environmental responsibility to build sustainably.

Taking a simple, systematic approach, we will present the perfect method for achieving optimal thermal performance in CLT constructions, using a combination of natural wood fibre insulation, airtightness and windtightness solutions.

We will share lessons learnt from the numerous CLT projects we have been involved with and spend some time looking at examples of detailing and critical junctions.  We will also cover specialist fixing details for wood fibre insulation with CLT.  

Following a summary, we would be pleased to look at how this applies to a practice specific project, with design review and discussion.

What you will do?

You will receive industry leading training from a highly experienced technical professional.  We actively encourage you to share details and drawings in advance of a suitable project so that it can be included in the presentation, making the session as relevant as possible for all involved.  There will be time for questions and discussion.

There will be the opportunity to see samples of different types of wood fibre insulation including rigid boards, flexible batts and loose fill as well as a range of airtightness and windtightness membranes, tapes and accessories.

What happens on the day?

We will generally arrive at your offices around 30 minutes before the CPD starts to set up.  A dedicated meeting room with projector/screen would be helpful, although not essential, and we will bring a laptop to present from. The presentation will start at the time you have chosen and generally last around an hour.

Following the CPD, we can arrange for our technical professional to meet with you to discuss specific projects, review drawings and make recommendations.  Please let us know in advance if you would like this additional free service.

Key points to take away based on feedback from previous attendees

The use of CLT and its benefits in construction

  • Benefit and structural capacity of the innovative insulation and cladding fixings
  • The benefits of adhesive membranes
  • Technical support available from Ecological Building Systems

What you Gain

The UK is now in a unique position to capitalise on the success and momentum of the early CLT pathfinder projects and many more ground-breaking schemes planned.

Having been involved technically with many exemplar projects, some of which are listed below, Ecological can bring an invaluable contribution to specifiers and contractors on the subject:

  • Headquarters of The Woodlands Trust in Grantham
  • The Steiner Academy in Frome
  • Headquarters of furniture company Vitsoe in Leamington Spa

Points Gained

This CPD is a 1-hour stand-alone CPD providing 1 point towards maintaining your professional standard.  This can be doubled with an additional 1-2 hour related activity.

Sustainable architecture is a rapidly developing area and is a RIBA core curriculum topic.  There is a requirement for a minimum of 2 hours to be spent on each of the core 10 topics.

How it can be applied in the future (based on feedback from previous attendees):

  • Consider the use of CLT in building
  • Consider external structural loading

Continued Development 

We have a dedicated Training Area at our UK office in Cumbria where we offer practical training, giving delegates the opportunity to experience the application of our systems first-hand.

We are often involved in various events and shows around the country which include the use of wood fibre insulation as well as our airtightness and windtightness solutions in different build-ups on a variety of CLT constructions.

We regularly involved with on-site training, toolbox talks etc with all key stakeholders and trades involved in specific projects.


  • Why wood?
  • Keeping it simple with CLT and wood fibre insulation
  • Achieving airtightness and windtightness with CLT
  • Specialist fixing details for wood fibre insulation with CLT
  • Summary
  • Practice specific design review and discussion


Niall Crosson

Niall Crosson

Group Technical Manager (BTech, MEngSc, MIEI, CEPHC)

Niall is the Group Technical Manager for Ecological Building Systems and was also the company’s first employee. Niall holds a first class honours degree as a Bachelor of Technology and a Masters in Eng.Sc. Niall is a certified Passivhaus Consultant and has provided technical guidance on many award winning low energy projects in Ireland and the UK, and has authored or co-authored several chapters in both the Passivhaus Handbook and the Passivhaus Designers Manual. Niall is also on the board of directors of the Irish Green Building Council and provides guidance on several national standards committees.  Along with this, Niall has contributed to several construction publications including The Journal of the RIAI.

Ilias Igoumenidis

Ilias Igoumenidis

Technical Support Engineer (MEng Civil Engineer, CEPHD)

Born and raised in Greece, Ilias graduated from the Polytechnic school of Civil Engineers of Patras University and for many years ran his own Design and Construction company prior to moving to the UK to join Ecological.   Since 2013, he has been heavily involved with low energy consumption in building projects.  He was the first person in the Hellenic Passive House Institute to gain the International Certification of a Certified Passive House Designer. Ilias played a significant part of the first Certified Passive House project (Enerphit) in the south eastern Mediterranean area “Passivistas”.

Neil Turner

Neil Turner

Technical Sales Manager (BSc Hons)

Technical Sales Manager at Ecological Building Systems. A BBA-competent U-value assessor, who has been involved in developing CEN (Comité Européen de Normalisation) European standards, Neil has extensive experience in the building products sector.  Neil advises architects, contractors and timber frame specialists on the specification of sustainable insulation products and has been involved in numerous sustainable projects throughout the UK.

Fintan Wallace

Fintan Wallace

Architectural Technologist (MEngSc BTech, MIEI, CEPHC, CEPHT)

Fintan Wallace is an Architectural Technologist at Ecological Building Systems. Graduating from Dublin Institute of Technology in 2011 with a B.Sc (Hons) in Architectural Technology, it was here in D.I.T’s Bolton Street where Fintan developed a strong interest in low energy and Passivhaus design. From here he continued his studies becoming both a Certified European Passivhaus designer and tradesperson. Fintan has travelled to Baden Württemberg in Germany to study passive housing and sustainable energy technology, gaining significant knowledge regarding the use of natural insulations in timber frame and solid wall constructions. Fintan has been involved extensively in a deep energy retrofit of a property to the Enerphit standard in the west of Ireland and now advises on numerous projects throughout the UK for newbuild and retrofit.

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