Course Introduction


1. Comfort, sound insulation and resilience
2. Overheating
3. Pitched roof insulation
4. Flat roof insulation
5. Internal solid wall insulation
6. External solid wall insulation
7. Timber framed wall insulation
8. Suspended floor insulation
9. Air tightness and the use of tapes
10. Use of vapour control membranes
11. Maintenance and design
12. Choosing the right systems

Need Materials?

If you’re working on a building project and need help specifying your materials, checkout the following.


Welcome to Back to Earth’s online course. Our course is designed to provide you with a practical guide to understanding and using wood fibre insulation. It’s the perfect course for anyone interested in sustainable construction and the use of wood fibre insulation systems.

Over the next 12 modules we’ll guide you through a range of topics, starting with an overview of the subject and moving on to cover roof, wall and floor insulation. We hope you find the course useful, and if you’d like to discuss anything in more detail, please do not hesitate to get in touch with us.

Your instructor

“Chris had been a builder and has built his own beautiful Passivhaus, so, unlike most importers of building materials, he completely understands what goes into every aspect of building a house, he really knows his materials and how they fit into an entire house build.”

This course has been expertly curated by Chris Brookman, founder of Back to Earth. Chris has over 21 years of experience working in sustainable construction.

During that time he’s worked on numerous building projects, ranging from major residential developments to one off, self-build projects. You can find out more about his work here. Chris has developed this course to allow others to gain a deeper understanding of wood fibre insulation and how to use the material effectively.

If you are an architect, builder or even self-builder and are considering using wood fibre insulation, this course is designed for you.

Course supporters

We’ve been fortunate enough to work with some fantastic partners during the development of this course. The following organisations are well worth considering for your sustainable building project.

Registered Architect + Certified Passive House Designer. BUSINESS:  BLOG: Passivhaus in Plain English 

Architect director at Paul Testa Architecture, university tutor at 

Marianne is a Chartered Building Surveyor specialising in the repair of older buildings.

Creators of innovative timber frame structures. Specialist oak frame designers and carpenters who hand craft award winning buildings.