Our design department offers architects and developers tailor-made rooftop projects – from idea and concept to execution.
Together, we realize aesthetic rooftop solutions that enhance both buildings and their surroundings.
Green Roofs of the Future
We create and develop the next generation of sustainable, living rooftop landscapes for recreation, food production, and increased biodiversity.
Mattak designs and builds site-specific green roofs with specially developed systems for low maintenance and long lifespan.
projects
Sundt
The iconic Sundt Department Store was designed by Per Grieg in a functionalist style. For us, it has been important to preserve the original architectural expression.
BIOTOPE ROOF
For BARA Eiendom at Kronstad in Bergen, we have developed a nature-inspired rooftop garden on top of the new Link building.
Buen
Yes, nature, recreation, and vegetable cultivation are indeed possible on rooftops in Bergen.
Rooftop Garden on Fenderen
We are well underway with establishing a new rooftop in a business cluster located in a former shipbuilding area.
NHH- Transforming black roofscapes into vibrant green biotopes
As part of a strategic sustainability initiative, we conducted a feasibility study for the Norwegian School of Economics (NHH) exploring how their existing rooftops can be transformed into productive and inviting landscapes – combining vegetation, solar panels, food cultivation, and social spaces.
The team
Sigurd L Boasson
Concept Developer and CEO
Sigurd is the founder of MATTAK and has been part of the development of both the company and all of our projects. His strength lies in creating concepts that combine nature, social meeting places, and food production in urban environments. Sigurd has a background as both general manager and project manager at the landscaping company and urban developer Boasson AS, with technical education as well as a master certification in landscaping.
Sigurd is genuinely passionate about utilizing rooftops for people, nature, biodiversity, and food production wherever possible. He also believes that much more is possible if we are willing to think unconventionally and push boundaries.
Kristian Holo
Head of Discipline and Project Design Lead
Kristian has been with MATTAK as Head of Discipline since our very first rooftop project was conceptualized, designed, and built in 2022. His strength lies in working from idea to concept and into detailed design. His interdisciplinary expertise in building physics, construction, regulations, and groundwork gives us a practical and functional technical foundation. Kristian has a background as a certified landscape technician and landscape architect with extensive experience in design and project management.
Kristian is committed to carrying forward good experiences, building on what works, and continually challenging ourselves with each new project.
Jørgen Holo
Design, Product Customization, and 3D Specialist
Jørgen’s background as an industrial designer gives the team valuable insight into how we design tailor-made solutions that add value to our projects. One example is our slanted railing, which meets safety standards while not feeling like a fence. With his unique expertise in 3D modeling and interdisciplinary collaboration, we are able to visualize both known and unforeseen challenges in early phases..
Christopher Haatuft
Sustainability Leader and Food Specialistg
Christopher is, together with Sigurd, one of MATTAK’s pioneers. Since day one, he has brought a holistic focus to the overarching sustainability perspective. His input on material use, food yield, and other ecological services from rooftops, along with the importance of creating strong social zones from a restaurant and hospitality perspective, makes MATTAK DESIGN something unique and distinctive.
Christopher has a background as a restaurateur and Michelin-starred chef, with experience from restaurants in Paris, the USA, Asia, and Norway.
Andreas Vadum
Vegetation and rainwater runoff Specialist
Andreas has a background as a landscape architect and has worked on large, complex developments in urban areas. At MATTAK, he contributes valuable knowledge and expertise in locally adapted vegetation, using rainwater runoff as a resource, and managing rainwater effectively.
Jan Sverre Nesbø
Technical Support and Building Consultantg
Jan Sverre has been with MATTAK since the beginning, and his crucial input on technical solutions provides an added layer of quality assurance. We do not design anything that cannot be built, and we integrate durable and high-quality solutions into all our projects.
Jan Sverre has a background as tender manager and project manager at the landscaping company and urban contractor Boasson AS, with both technical education and a certified builder’s qualification.
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