- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
Last edited 26 Nov 2021
Sustainable Timber in Construction
If sustainably sourced, timber is undoubtedly one of the most environmentally-friendly materials currently available, being a natural carbon sink and truly renewable. This has made timber a popular material among sustainability champions and protagonists of green construction. Although its use in construction dates back many centuries, the advent of Cross Laminated Timber (CLT) has now made it possible to construct complete buildings in timber.
 What is sustainable timber?
Sustainable timber refers to timber that has been harvested responsibly from well managed forests that are continuously replenished; and ensure that there is no damage to the surrounding environment, or to native flora and fauna.
In the UK two main certification schemes, Forest Stewardship Council (FSC) and Programme for the Endorsement of Forest Certification (PEFC), assure that all wood and wood-based products originate from sustainable sources.
 Timber and climate change
Timber has a significantly lower embodied carbon footprint compared to other mainstream construction materials. This is due to the minimal processing required, even when accounting for the process of laminating (glulam or cross-laminated timber) which is generally required to create structural timber products.
If sustainably sourced, using timber can have an additional positive environmental impact because trees absorb carbon dioxide through photosynthesis and lock it away as carbon, thus removing it from the atmosphere. This phenomenon is called sequestration and can essentially offset the processing and transportation energy associated with timber products. Therefore, timber can be considered a carbon negative material. It is however important to remember that the sequestered carbon will be released at the end of life of the timber product (unless it is reused or recycled). The global warming implications of disposal options vary and are detailed in the table below.
It is interesting to note that in response to the Paris Agreement (COP21), scientists proposed a range of “negative emissions technologies (NETs) in order to limit climate change to “well below 2C”, three of which relate to timber and its capacity to absorb and store carbon from the atmosphere: afforestation and reforestation, building with biomass and biomass with carbon capture and storage.
Recent studies have found that the life cycle emissions from a CLT framed building (without including sequestration) can be about 30-50% lower than a typical concrete framed building. When sequestration is included, the benefit can be much more significant. However, it is important to note that these results assume that 100% of the timber is diverted from landfill at the end of its useful life. If timber is landfilled at the end of its useful life, analysis has suggested that the net emissions from a CLT framed building could exceed the life cycle emissions from a typical concrete framed building.
It is important therefore to explore the wider implications of sustainable solutions to ensure they are not creating problems for future generations.
- Chain of custody.
- Confederation of Timber Industries.
- Delivering sustainable low energy housing with softwood timber frame.
- Environmental plan.
- European Union Timber Regulation.
- Forest ownership.
- Forest Stewardship Council.
- Green Seal.
- Legal and sustainable timber.
- Legally harvested and traded timber.
- Programme for the Endorsement of Forest Certification.
- Sustainable materials.
- Sustainable Wood.
- Sustainably procuring tropical hardwood.
- Whole life carbon assessment of timber
Featured articles and news
Digital game and video competition for UK students aged 16 to 18.
Heritage protection in England vs Australia.
Three-quarters of fire doors fail inspections
The role of geoparks, biospheres and world heritage sites.
Just one month to go ! Find out more here.
A new gallery for the University of Huddersfield.
What will it take to stop it ?
To celebrate world bee day 2022 !
Not forgetting part F and the new part overheating part O.
As energy prices jump up in cost.
With people in the UK from Ukraine.
Industry leader Steve Murray takes on role.
An abundant and versatile building material.
600,000 heat pump installations targeted per year by 2028.
Helping prevent those unwanted outcomes.
How has transport changed due to Covid-19 ?
Will you need it ? after June 15 and the new Part O ?
Create an account and write the first of many articles.
CIAT commentary after the first meeting.
Who is to blame?
Research recommends focussing on portfolio success rather than project success.