Sika joins World Green Infrastructure Network

Sika joins World Green Infrastructure Network

WGIN welcomes Sika AG as a new corporate member. The Swiss multinational specialty chemicals company will also be part of the network’s European Chapter.

The World Green Infrastructure Network (WGIN) is delighted to announce that Sika is joining the Network as a new corporate member. Sika is also joining WGIN’s EU Chapter, the group’s advocacy section dedicated to advance the green infrastructure agenda in the European Union.

Sika AG was founded in 1910 with the invention of a quick-setting waterproofing admixture for mortars, which was used to waterproof the Gotthard Tunnel in Switzerland and enabled the Swiss railway company to electrify the important connection between Northern and Southern Europe. Today, thanks to its leading position in developing and producing systems and products for bonding, sealing, damping, reinforcing, and protecting in the building sector and motor vehicle industry, the company is considered as enabler of sustainable transportation and construction.

Sika has been waterproofing green roofs and other landscaped areas for over 40 years globally, and in the United States for over 25 years. Sika’s Sarnafil® roofing systems have recently celebrated their 60-year anniversary. With close to 400 million m2 of roofing and waterproofing membrane installed worldwide, architects, specifiers and building owners know they can rely on Sika for proven products and system performance. Already today, Sika generates 70% of its sales with products that have a positive sustainability impact.

Manfred Koehler, President of the World Green Infrastructure Network, commented: “We are very pleased to welcome Sika as a new member of WGIN and of its EU Chapter. As a multinational company well known for its innovative and high-quality products, Sika is a perfect match with our ambition to promote the deployment of green infrastructure globally. We look forward to working together on this key agenda.”

Patricia Heidtman, Chief Innovation and Sustainability Officer at Sika, said: “Sustainability is at the center of everything Sika does. Our company is focusing on helping customers to reduce their CO2eq footprint by providing innovative solutions and products. In many respects, Sika’s technologies make the company an enabler that strongly contributes to the climate neutrality journey of the construction and automotive industries. That’s why we share the ambition to promote green infrastructure in urban planning and we are happy to join WGIN and support them in this endeavor.”

 

Patrick Horisberger, Head Target Market Roofing at Sika, added: “Green roofs lower the energy costs by absorbing heat which in turn significantly reduces the need for air conditioning in summer and provides additional insulation in the winter. Another important benefit is their ability to reduce and slow stormwater runoff, besides using the roof as a recreational area. With our membership in WGIN we want to influence and support the development of green roofs by sharing know-how, supporting studies, and developing new solutions.”

 

Download the pdf version

 

Media contacts Luigi Petito Head of Secretariat, World Green Infrastructure Network – EU Chapter luigi.petito@wgin.org

 

Harriet Sihn Public Relations Manager, Sika AG sihn.harriet@ch.sika.com

 

ABOUT WGIN The World Green Infrastructure Network (WGIN) is a collaborative global network promoting the integration of green infrastructure in urban planning. Since 2009, WGIN has expanded to represent 22 National Associations and has held 10 World Green Infrastructure Congresses. WGIN has established supportive working research committees and has an active board of directors representing 11 nations. In 2019, WGIN set up a European Chapter with the aim of raising awareness among EU policymakers about the multiple benefits of green infrastructure.

 

ABOUT SIKA Sika is a specialty chemicals company with a leading position in the development and production of systems and products for bonding, sealing, damping, reinforcing, and protecting in the building sector and motor vehicle industry. Headquartered in Baar (Switzerland), Sika has subsidiaries in 101 countries around the world and manufactures in over 300 factories. Its more than 27,000 employees generated annual sales of CHF 9.3 billion in 2021.

Follow us on our social channels.

Follow us on the channel that best suits you to receive our latest updates!

NEW

LATEST POSTS

Green roofs for urban rainwater and stormwater management

The new paper by WGIN’s EU Chapter “Green Roofs for Urban Rainwater and Stormwater Management”, explores how green roofs can contribute to more climate-resilient cities. The paper highlights their role in managing rainfall, reducing pressure on urban drainage systems, and delivering wider benefits for biodiversity, urban cooling and well-being. Published ahead of the European Commission’s forthcoming Climate Resilience Framework, the paper underscores the importance of integrating green infrastructure and nature-based solutions into urban planning and climate adaptation strategies. Download the paper here.

Green roof research measures performance, but not yet people

New study maps 25 years of green roof literature and finds affordability and social equity nearly invisible. Submitted by WGIN members Ferre Maes and Bert Belmans In a study published in City and Environment Interactions, WGIN members Ferre Maes and Bert Belmans, together with Roméo Delcroix (Vrije Universiteit Brussel), analysed more than 3,500 green roof articles published between 2000 and 2025. They tracked how often 13 performance dimensions appear in titles, abstracts and keywords. The results show a clear imbalance. Stormwater management appears in 37% of publications, urban heat island mitigation in 19% and building energy in 18%. Affordability (1.7%) and social equity (3.2%) are among the least visible topics in the field, and have remained marginal for 25 years. The study does not show that green roof implementation is inequitable; it shows that the published evidence cannot yet answer this question. Research on parks, urban greening and green stormwater infrastructure engages with affordability and equity far more often, which shows this gap can be closed. There is no reason green roof research can’t do the same. A call to action WGIN’s mission is to advocate and promote the integration of green infrastructure in urban planning, globally. But planning decides who benefits, and evidence on who benefits is largely missing. If we want cities, funders and residents to trust green roofs as a public good, we need to be open about what we know and what we don’t. That openness is also an opportunity: evidence on affordability and equity is what opens the door to public funding, social housing and neighbourhoods green roofs have yet to reach. We call on our community to: Count people, not just performance. In research papers, project reports and case studies alike, report cost, access and who benefits alongside technical results. In publications, name affordability and equity explicitly in titles and abstracts so the work can be found. Plan for equity from the start. Build these questions into green roof strategies, subsidies, projects and research calls, before roofs are built. Make costs transparent. Manufacturers, installers and researchers alike can share life-cycle cost data, from installation and maintenance to lifespan and savings, in a consistent and anonymised format, so support schemes can reach beyond those who can already afford a green roof. Neighbouring fields already study performance and people together. The green roof community can too! Read the full paper here: 10.1016/j.cacint.2026.100476 (open access)

WGIN Global Green Roof Professional Development and Accreditation Programme – Call for National Associations Partners

In April 2026, WGIN launched the Global Green Roof Professional Development and Accreditation Programme. This initiative aims to establish an internationally recognised professional training programme focused on green roof design, installation practices, maintenance, and long-term performance. The online training is designed to deliver a set of universal quality best practices rooted in knowledge rather than technical skills. The programme’s intent is to accelerate the development of national and regional green roof markets by providing online training and accreditation.  The Global Green Roof Professional Development and Accreditation Programme is now looking for two national associations to design national training modules and examination questions based on the core curriculum developed under this project. The application process is open until 7 September. Selected national associations will be contacted by 21 September. For more information, see the call for interest. To apply for the call of interest, visit this link.