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An Exceptional Green Roof

Green Team at Green Roof Technology, - Monday, February 27, 2017

Sufism Reoriented Sanctuary

 

An Exceptional Green Roof

After more than half a century in temporary quarters, Sufism Reoriented now has a permanent home in Walnut Creek, California. Designed under the guidance of Murshida Carol Weyland Conner by the distinguished architectural firm of Philip Johnson Alan Ritchie, the new sanctuary is set among serene gardens on three acres of land in a suburban neighborhood about twenty-five miles east of San Francisco.

Alan Ritchie’s design perfectly realized Murshida Carol Weyland Conner's vision. Brought to fruition by the Architect of Record, Soga + Associates Architect Inc, this beautiful design is to endure for over 700 years. The building is innovative in many ways, from its curved marble cladding from Carrera, Italy, to its climate control with state-of-art air filtering systems, to its Green Roof composition with 100% recycled Foam Glass Gravel  engineered by Jorg Breuning , Owner of Green Roof Service LLC , to its storm water management with rain harvesting features to retain the entire annual rainfall, to its 33 feet tall hollow bronze sculpture with seismic base isolators and acrylic butterflies, standing inside of a 3-story tall room with curved glass guardrails.


With highly experienced architectural services and project management by Clement T. Soga, Soga + Associates Architects Inc, the Sanctuary’s construction began on May 24, 2012 and its Ribbon Cutting ceremony was held on February 24, 2017.

 

Green Roof Service LLC – Green Roof Technology worked hand in hand with Sufism Reoriented, Soga + Associates Architects Inc, and SWA Group Landscape Architecture to create a Green Roof solution that perfectly mimics the natural soil horizons with materials that will last thousands of years without compromising or limiting healthy growth of any vegetation at any time. Jensen Landscape carefully implemented the details and specifications of this new type of Green Roof under the direction of Jorg Breuning.  It is the first Green Roof in North America that utilizes Foam Glass Gravel made of 100% recycled glass on a large scale.  The ultra-lightweight material performs as a drainage and retention layer combined with outstanding structural capacities. Foam Glass Gravel is produced in the USA and in Germany according to the strict specifications of Green Roof Service LLC - Green Roof Technology.      

27th February 2017

Jorg Breuning

World’s First Modular Green Roof System

Green Team at Green Roof Technology, - Sunday, February 12, 2017

World’s First Modular Green Roof System

Modular Green Roof System

Green Roof Professionals around the globe often wonder or speculate how and when the commercial modern Green Roof industry really took off. There are many opinions and alternative facts out there but only a few really know that the hot spots with patents were in Basel Switzerland and in Stuttgart Germany for seamless or wall-to-wall Green Roof systems.

The World’s first modular (or tray) system has been developed in Stuttgart by Brecht and Hämmerle, mainly known as the Brecht System (if one doesn’t consider terracotta pots on roofs as a modular system).

The Brecht System was a basic polystyrene box with a three-layer Green Roof system. The system was available in extensive, semi- intensive and intensive planting depth. With this simple three-layer system the inventor combined many benefits in one box. All systems had a water reservoir for maximum water retention – more than any other Tray system currently on the market and more than any fabrics, foams or mineral wools, and the boxes contained standard nursery soil for a healthy fast growth and to lower costs.

There were different options for covering the less attractive boxes, with either wood or metal (aluminum). Today we call these frames around the boxes: Edging.  

Based on the polystyrene, the boxes were very lightweight and easy to install. Actually, they fitted into each other to create different heights and different planting depths. I would describe them as a Modular –LEGO-like planting system.

Unfortunately, any polystyrene as a limited lifespan when exposed to UV or biological activity and so many of these roof gardens had problems after 5-10 years. Further, many of the plants rooted out of the boxes (drainage holes) and penetrated the waterproofing.

Around 1992 the last Brecht System was removed and replaced by wall-to-wall or seamless Green Roof systems. All of these Green Roofs are still existing - if the building still exists.

The Brecht Modular Green Roofs system had also other issues that are similar to the currently existing systems. However, nowadays the tray systems use metal, other plastics, and mainly with irrigation systems. This makes them last longer, but as often only delays the point of failure. The roots of plants and the biological activity on healthy Green Roofs are often underestimated as well as the functional lifespan of foams, polystyrene drainage mats, and mineral wool products.

Norwegian Green Roof Log Cabins in the USA

Green Team at Green Roof Technology, - Wednesday, February 01, 2017

Norwegian Green Roof Log Cabins in the USA

Sloped Green Roof

Around 50 years ago there was trend in the USA of having Norwegian Log Cabins as a second home.

All of these cabins came entirely from Norway and they all had a Green Roof. Most of these cabins with timber from Norway still exist and the owners are very proud of having these solid, cozy and unique structures.
Unfortunately most of Green Roofs have been replaced by metal roofing during the last 20 years.

Nevertheless the simple Green Roof systems (without plastics) lasted at least 3 decades without major maintenance and without any irrigation systems. Even Fire Marshals never had an issue with this unique long lasting roofing solution.
Around 12 years ago I had the honor to meet a building owner, who wanted a Green Roof back and as it was originally designed. The project was near Washington, DC and meanwhile the building was surrounded by 60 feet tall trees and entirely in the shade. The structure was still able to carry around 30psf for the Green Roof.

Finally, with a new roofing and a divided drainage system in a multilayered, seamless Green Roof the owner was satisfied with the result. Look at the picture (from 2015) and tell me what you think.

There is no irrigation system, no single source warranty, very limited use of plastics and very limited maintenance.



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