What we buy and where we buy it matters at every level of our supply chain - from the design team and main contractor to the operatives on site and our suppliers producing materials across the UK and abroad. To get it right, we take a thorough approach to sourcing sustainable materials.
We’re committed to sourcing core construction products and materials responsibly. This includes environmental and ethical sourcing, health impacts, embodied carbon impacts and resource efficiency considerations. But supply chains in construction are often fragmented and transient. That’s why we’ve developed clear guidelines.
In early 2020, we published our Prohibited Materials List. This sets the minimum requirements for sourcing materials on our projects. Since then, we have expanded its scope and published our Materials Brief to provide guidance to design teams on materials that we would avoid, prefer and those that would be ideal. We circulate this guidance at the start of any project. From avoiding laminated glass to recommending air purifying paints, the list states clearly our expectation of high quality and thoughtful design. With construction progressing on four of our sites, our procurement has been a lot more varied in 2020. Despite this, we remain on track to source 100% of our core construction materials with responsible sourcing certification, and exclusively from the UK and Europe.
Our guidelines for our developments are simple. Core construction materials including steel, concrete, hard landscaping and facades should always come with responsible sourcing certification. Where certification isn’t available, we ask for evidence of basic health, safety and environmental management. And for every development we always target FSC Project Certification, to guarantee timber is from responsible sources. Across our development pipeline, we have early in-depth conversations with specialist contractors, to be able to influence design and specification, and we request information from suppliers to improve transparency in our decision making.
What’s on the surface matters too, and for our material finishes we’re recommending we select, wherever possible, natural low-carbon materials that can be sourced locally. At Nova East, the proposed palette includes extensive areas of carbon-negative materials such as cork and timber
Reducing carbon emissions
To meet our carbon target, we’re also addressing supply chain emissions by specifying materials with recycled content, concrete with cement replacement, metals with low carbon emissions from their manufacturing process, and source heavy materials like stone locally. Other factors like cost, availability and lead in time are equally important, but we need carbon to be considered for every material choice if we want to reduce our supply chain emissions.
The first step is to simplify our designs to limit the cost of materials. Buying fewer materials is the best way to reduce carbon. For instance, at Lucent W1, we’re reducing embodied carbon by 20% by designing the structure to be leaner and simpler to build, alongside specifying low-carbon materials. This will save materials and programme costs. We’re also adopting modern methods of construction, such as a platform approach to design for manufacture and assembly, reducing the construction time, waste and cost. At Sumner Street, this approach achieves a reduction of over 19% in embodied carbon compared to traditional construction methods.
We then focus on the properties of the materials we specify and procure (alongside cost and availability), to adopt low-carbon alternatives wherever possible. This means careful analysis and selection of every raw material we use. Our aim is to avoid materials with a high-carbon intensity such as traditional steel and concrete. We replace them with materials that have a high recycled content, an inherently low-carbon profile, such as engineered timber, or that are sourced locally.
Our Materials Brief and Prohibited Materials List
The Global Slavery Index shows that certain countries have a substantial risk of slavery in manufacturing. So, when our designers specify materials or our contractors buy materials from outside the EU, we will engage with the supplier to ensure our expectations are met. Sometimes this will be in the form of an assessment, where we check suppliers against fair pay and labour standards using tools like SEDEX, EcoVardis and SA8000.
With our growing development pipeline, we’ve taken a closer look at our procurement policies to equip ourselves and our partners with the right tools for meeting our expectations.
That’s why we’ve published our new Materials Brief which includes our Prohibited Materials List, to strengthen our fight against modern slavery in the sourcing of construction materials. The brief contains the material requirements for common materials used on Landsec development and portfolio projects. It also sets out the materials we prohibit use of in our construction activities based on health impacts, responsible sourcing, embodied impact and resource efficiency considerations. The prohibited materials list is based on the Walkfree Global Slavery Index and on the Ethical Trading Initiative, to enable us to assess materials and geographical areas at risk, and promote sourcing of responsible materials.
We’re laying out our expectations from our partners clearly, so we can address human rights challenges within the industry and discuss how we’ll work together to increase transparency and minimise risk. Our Prohibited Materials List complements our Sustainability Brief for Developments.
As part of digitising our construction methods, we trialled a cloud-based software, at the Forge. This automates site data collection
and uses artificial intelligence to provide accurate and immediate insights into waste and material movements to and from the construction site. It has proven extremely effective at minimising environmental risk. We have set a number of responsible procurement targets at the Forge. Since starting on site, Qflow has identified 159 risks early by flagging any noncompliance at the site gate, removing any human handling errors and minimising the time needed to address them. It has also given us insights into waste movements off site, allowing us to think how we can manage our waste more efficiently. It is making our supply chain more transparent and has proven vital to staying on track to achieve our sustainability targets at the Forge. The trial was so successful we have extended it for the duration of the construction, and are now working with QFlow to increase use of their data in our reporting and planning.
|We prefer||We want to avoid|
|High recycled content and post-consumer reclaimed materials||Virgin aggregates|
|Cement replacement products, like GGBS and PFA||Anodised metals|
|Rapidly renewable materials like timber||Crude oil-derived products|
|Steel produced in electric arc furnace||Steel produced in traditional furnaces|
|Regional materials, sourced within a 300-mile radius||Stone and heavy materials manufactured outside the EU|