Last edited 24 Mar 2021

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Wood and the Circular Economy

Wood circular.jpg


[edit] Introduction

Throwaway culture is on the rise, yet so is the awareness of climate change. It is a paradoxical situation and one that needs addressing now on both sides.

The Department for Environment, Food & Rural Affairs (Defra) reported that 62% of total waste accumulated in the UK was down to construction, demolition and excavation. And the Circle Economy claims that global construction of housing and infrastructure has the largest resource footprint at 38.8 billion tonnes. These are difficult statistics for the construction industry, but they can be reversed.

[edit] The circular economy

The Ellen MacArthur Foundation defines the circular economy as: “based on the principles of designing out waste and pollution, keeping products and materials in use, and regenerating natural systems.”

The 2020 Circulatory Gap Report sites prioritising regenerative resources as one of the seven key elements of the circular economy and a transformational step forward: “Ensure renewable, reusable, non-toxic resources are utilised as materials and energy in an efficient way.”

[edit] Cradle to Cradle

In 1995, architect William McDonough and chemist Dr Michael Braungart created the Cradle to Cradle Design Framework, which led to the Cradle to Cradle Certified Products Program (C2C Certified).

Their reason for developing this philosophy was to advocate for “intentionally designed products which eliminate the concept of waste, use clean energy, value clean water and celebrate diversity.”

It is a human-centric and environmental-centric approach to creating new products more efficiently and more sustainably that ultimately do not compromise the environment.

The framework is based on quality assessment and innovation. Products are assessed under five criteria called quality categories:

The product is then given an overall certification level, a grade - Basic, Bronze, Silver, Gold and Platinum - based on how many of the quality categories the product fulfils.

In 2017, the British Woodworking Federation did a feasibility study on cradle-to-cradle timber windows. The windows were awarded gold for material re-utilisation, renewable energy and carbon management, water stewardship and social fairness. Silver was awarded for material health, giving an overall 'silver' grading for timber windows. The only reason for not achieving Gold was that only 95% of the materials used were wood and preservatives. To get the top mark, 100% of the materials need to be assessed.

At the 2019 ASBP Awards, EcoCocon won the Product Innovation Award for its use of straw bale panels in a rural self-build. The panels were C2C Certified with a silver award, and the project was a first for using this particular system in the UK. What impressed judges most was “the combination of extremely high fabric efficiency (Passivhaus certification) achieved through the use of a range of low-impact, natural materials to create a comfortable, healthy environment.”

With the number of C2C Certified products rising, others have been inspired to raise awareness of this offering, cue the creation of Cradle to Cradle Marketplace. As a natural renewable building material, it is unsurprising there are already a number of timber C2C Certified products available for the built environment.

[edit] Cradle to Cradle in practice

The Cradle to Cradle Certified Products Program is not only a certification scheme but a benchmark for design. It is not just the product’s ability to be regenerated that makes it attractive, it is the safety of the product too. As part of the certification process all the components making up the product are tested against toxicity standards and any risks are identified. This extends to the supply chain too.

In a recent interview in Dezeen, Ikea’s head of circular design, Malin Nordin, announced its partnership with the Ellen MacArthur Foundation. Nordin talked of the importance of embedding the circular message into its supply chain. "What we realised quite quickly is that IKEA being a circular company on its own is quite pointless. We are interdependent of other businesses."

This stance from huge global brands is likely to trickle down and influence the supply chain. Eventually, it could be a requirement for any supplier feeding into a circular economy-led business.

Major housebuilder, Barratt Developments, announced two sustainability targets for its supply chain at its 2020 Supply Chain Conference to help reduce waste and reduce carbon emissions. It also recycles wood waste through social enterprise, Community Wood Recycling, and donated 790 tonnes in 2019. This was used in the community for uses such as DIY projects, biomass heating and woodchip.

It makes good business sense for anybody involved with designing, making or specifying products to look at the changes they need to make to ensure inclusion in these supply chains if they are to be future-proof and enable a circular economy.

[edit] Building the UK’s circular economy

The Vision 2040 of the European Forest-Based Sector targets material collection rates of forest-based products at 90% and for their reuse and recycling to account for 70% of all recyclable material. This idea of a circular economy would store carbon and substitute more energy-intensive materials.

In the UK, the Green Building Council (UKGBC) is working with its members and the wider industry to develop practical guidance which will enable organisations working in the built environment to overcome the barriers to implementing circular economy principles.

[edit] Wood helps the world go round

In the timber industry, many companies are already recording environmental data to help prove a product’s credentials. The Lifecycle Database is based on generic wood products in the UK including structural products, panel products, solid timber products and windows. The data collected is based on Lifecycle Assessments (LCA) and Environmental Product Declarations (EPDs).

The LCA covers cradle to grave, including forestry, harvesting, transportation, processing and manufacturing, through to the various end of life options. Measuring the manufacturing of products in this way not only provides traceability but provides insight into the performance of the product too.

Timber membership bodies take sustainability seriously and many have policies, tools and certification schemes in place that support the circular economy approach.

[edit] Circular design

A key element to making the circular economy work is circular design. The Circular Design Guide offers advice and an abundance of free resources to encourage discussions around the concept. Architects often face difficulties in persuading clients to go with an option that is not the norm. The Circular Design Guide offers advice on how to have this conversation with a client and educate them on why circular design is so important.

Guidance is offered on material choice including ‘materials journey mapping’. Created in partnership with the Ellen MacArthur Foundation, it encourages those involved to think about the parts and materials, processing, production, sourcing, and other product ‘ingredients.’

[edit] Wood CO2ts less

Wood befits the ‘reduce, reuse and recycle’ movement. It also helps to reduce CO2 in the atmosphere thus contributing to the slowing down of climate change as wood captures and stores carbon. It is a cost-free solution to carbon capture. Wood can also be used to offset sectors of the economy that cannot become carbon neutral, so it is beneficial to use this natural and renewable material instead of other materials.

Studies have shown wood products can improve emotional state, reduce blood pressure, heart rate and stress and improve sleep patterns. Wood interiors also add warmth and character. Therefore, it is often used in biophilic design, a way of bringing the outdoors in.

To find out more about wood and the circular economy including biobased materials, read this interview we did last year with sustainability expert Pablo van der Lugt.

Find out more about the Wood CO2ts less campaign here.

[edit] Related articles on Designing Buildings Wiki

[edit] External references

--Wood for Good

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