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Extensive Living Roof

Green roofs have been constructed for thousands of years, the most famous being the Hanging Gardens of Babylon. They have also been used in traditional building such as the sod roofs of rural Scandinavia. Experimentation in the earlier part of the 20th Century found that green roofs required special waterproofing, since roots were found to grow into what were typically tar roofs.


Our Mission

Over the past three years, research and experimentation have taken place primarily in Northern Europe, where sophisticated waterproof membranes have been perfected, construction standards have been developed, and green roofs' environmental, economic, and social benefits continue to be studied.

With heightened environmental awareness, many places worldwide have become interested in green roof technology.

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Extensive green roofs are designed with minimal planting medium profiles and sometimes only a mineral substrate.


The plants, normally moss, succulents, herbaceous plants and grasses, are chosen for their ability to regenerate and maintain themselves over long periods of time, in addition to being able to withstand the harsh conditions of cold, heat, drought and wind. Native species are often preferred.

Green roofs do not necessarily require irrigation, and since they are often not accessible to the public, they have fewer other requirements, such as guardrails.

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Why Choose TIGA?


Seamless installation of green roofing at one of my properties.
I would have no hesitation in recommending the services of Tiga and will Re-engage for future projects.

B Davies, 2023

Get in touch 

Every project starts with a conversation. Fill out the form and let us know what you want to achieve. A member of the TIGA team will be in touch.

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