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New Lancaster Green Roof

Green Team at Green Roof Technology, - Friday, January 25, 2013

The sun sets on the 3rd day of construction.  High winds and freezing cold temperatures have made this project particularly challenging.    

Using money from their $7 million dollar PENNVEST green infrastructure loan, the City of Lancaster has begun installing the first of 10 green roof projects.  The first extensive green roof is currently being installed on the Dewatering Building at the City’s Wastewater Treatment Facility.  The 7,000 square foot extensive green roof is divided between two rooftops.   Green Roof Technology has been the City’s green roof consultant for a while now and will continue to be involved every step of the way.  Our primary objective now is to oversee the installation of the extensive green roofs.  Many more pictures to come. 

Read more information about Lancaster’s Green Infrastructure PENNVEST loan at Water World.

Video highlighting Lancaster's green infrastructure plan.

Green Roof on Floating Home "Siberfisch"

Green Team at Green Roof Technology, - Monday, January 21, 2013

First Sustainable Home on the Water with a Green Roof

 

With the cost of living in large cities constantly rising, the search for viable alternatives is constant.

Flo Florian and Sascha Akkermann of design firm Confused-Direction and the project-developer Bernhard Urich had urban affordability in mind when they designed the Silberfisch houseboat.

The house is a thoroughly modern floating home that, instead of occupying a valuable plot of land, is anchored in a body of water. In theory, the Silberfisch would allow residents to remain in a location indefinitely or relocate on a whim. It’s an interesting concept whose acceptance by the general public might be debatable.

However, the eco-friendly principles underlying the house are universally appealing. Two of the primary “green” methods used in the house’s construction are a green roof planted with vegetation and the use of reclaimed wood wherever possible. The toilet is an Eco-Toilet which saves water recources. Additionally, the house produces zero emissions. As home prices and eco-friendliness become increasingly critical issues, Confused-Direction’s Silberfisch houseboat may become a realistic option.

 

 

 

 

 

 

 

 

 

Silberfisch houseboat is a floating home by Bernhard Urich and the guys from the design firm Confused-Direction Flo Florian and Sascha Akkermann. This eco-friendly project, with zero emissions, represents a balanced mix of design and maritime romance. It has been designed for the areas with big water surfaces or in cities where property costs are high house boats offer an alternative.

Visit also their home page:  www.schwimmhausboot.de/

 

Cool Roofs are not Green Roofs

Green Team at Green Roof Technology, - Thursday, January 17, 2013

By: Jörg Breuning

 

In Physics class we learned basics about thermodynamics and about thermodynamic equilibrium. In simple words the content of a black coffee mug “adjusts” faster to the surrounding temperature than in a white coffee mug assuming the material and material thickness of the mugs are the same.

Exposing these mugs to the sun light the black mug will convert the electronic energy (sun light) into heat faster and no light or shade cools it faster assuming the ambient temperature is lower. The physics behind converting light into heat is called radiation-less transition. White (or bright) colors reflect the (sun) light more effective than black. 

Any macroscopic or microscopic body on our earth is exposed to these physics properties including all particles in the air of which can be plentiful in polluted cities. While the sun light enters in to the earth's atmosphere, all bodies (particles in the air) receive portions of the sun's electronic energy and convert them in to heat. For example, on a high mountain we experience much more sunlight, or electronic energy, because the air is "thinner" or has less particles in which the light has to travel through. On a beach the light intention is also very high and this is caused by the reflection of the light off the the water and sand. Sunburns on the beach are of high risk because of the consistent wind, we don't experience the transition from light into heat on our skin as fast. No living organisms can reflect the light 100% effectively, but they can actively reduce the consequences (heat) by using techniques such as evapotranspiration.

Roof Surface Temperatures
(a sunny day in May, air temperature around 72ºF)

Reflective roofs can't reflect 100% of the light either, but they are good to a certain degree (see roof temps above). However while reflecting the light back in to the atmosphere, this reflected light will meet all the particles (bodies) again and substantially increase their temperature. It is well proven that less than 5% of sunlight is reflected back into space once it's in our atmosphere.

White roofs relocate the transition point of light into heat from the roof into the atmosphere or surrounding bodies (e.g. buildings). They simply don't eliminate the problem of increasing temperatures (heat island effect) caused by human settlements and they don't decrease the environmental foot print of structures. In addition, the white surface has a slow thermodynamic equilibrium. It takes a long time to to heat up in the winter (when heat is necessary) and cools down slower during summer nights.

The kingdom of plants were the only organisms over millions of year who developed a super-efficient mechanism to reduce the heat transitioned from the sun light. It is called evapotranspiration - powerful, miniature AC units powered simply by solar energy. These super little AC units are found naturally on Earth, but can be practically placed anywhere.  By using this naturally occurring phenomenon and installing green roofs, the outcome will go further beyond any man-made machine or material.

In many countries where insulation requirements are more intense than in North America, it is questionable whether reflecting roof material makes sense to start with. From a global environmental perspective and understanding the basic science of physics, reflective roofs are just relocating the heat issue caused by human development. It is similar to building a chimney higher at a coal power plant so not to pollute the air, when in fact the wind will just carry the pollution toward a different city.

Sometimes I wish all LEED™ professionals would have more common sense and follow these laws of nature and their own environmental gut feeling - it is simply better living under a tree canopy rather than under a polar glacier. 

A Nice Gift for Green Roofers - Un Jardin sur le Toit – First Green Roof Fragrance

Green Team at Green Roof Technology, - Monday, January 14, 2013

Un Jardin sur le Toit – First Green Roof Fragrance

by Jorg Breuning

Jardin sur le Toit by Hermès features a little slice of nature perched on the rooftop of the building of the house of Hermès in Paris, France. A feast for the sense and the mind. A fragrance of light and delight, crunchy and cheerful.

 

Hermes launches the new fourth fragrance from the collection of garden-inspired fragrances Un Jardin, named Un Jardin Sur Le Toit or “A Garden on the Roof” in 2011. Un Jardin Sur Le Toit refers to the especially luxurious garden located on the Hermes’ headquarters building roof. A secret roof garden, hidden in the heart of the city, in Paris.

The garden is full of aromatic herbs, flowers and fruits whose flavors vary as they pass through the metamorphosis induced by the seasons. Its fresh and sweet-smelling atmosphere is captured by apple, pear, rose, green grass, basil, magnolia and compost notes.  This fruity, vegetal, floral eau de toilette is appreciated by both women and men.

The composition is designed by Jean-Claude Ellena.

Picture: http://www.lacentraldelperfume.com

Elevating Urban Farms onto Rooftops

Green Team at Green Roof Technology, - Wednesday, January 09, 2013

By: Jörg Breuning

 
Photo credit: Kölner Wein Depot

Long before green roofs became necessity and rooftop farming was trendy in North America, Dipl.-Ing Markus Wittling was planning to elevate an entire vineyard on top of the Wine Museum in Cologne, Germany.  Build in 2002, the sloped green roof spans over the entire museum building of almost 20,000 square feet. It is the first vineyard on a roof, the first sloped rooftop farm and the first and oldest organic urban farm on a roof in the world.

In the middle ages Cologne was the most important wine trading town north of the Alps.  The "Weinmuseum Köln e.V." is honoring this factwith a brand new museum with astonishing and educational exhibits on wine. The green roof displays 40 of the most important grape species from around the world situated onto 720 vine stocks.  The soil layer (growing media) including granular drainage is approximately 27 inches deep and consists of a blend of porous volcano material like Lava rock and Pumice - materials in which grapes simply grow best. 

 This rooftop vineyard is a prime example of the performance of modern green roof technology and is ideal for educational purposes.  If you have a chance to visit Cologne, the Wine Museum is a must on your Green Roof Safari and your effort will be rewarded with amazing wine tasting

For more information: www.weinmuseum.com or simply contact us.

 

 

The Economics of Green Roofs from the Perspective of the Commercial Client

Green Team at Green Roof Technology, - Monday, January 07, 2013

 A Cost-Benefit Analysis of Extensive Green Roofs

In 1994, Fritz Hämmerle published an analysis on the economic benefits of extensive Green Roofs for the very first in the international Green Roof magazine Dach + Grün. Nearly 20 years later, it is now undisputed that extensive green roofs have numerous positive effects on the environment and the physical properties of buildings. Nevertheless, today only a small amount of extensive Green Roofs have been installed in North America and this is mainly due to the high initial costs of construction and the commitment to proper long-term maintenance.

The lastest cases study (2013, Jorg Breuing) about the economics of extensive Green Roofs in the USA is now available for download.

Download the entire case study as a PDF (107KB) exclusively at our Resources Page.                                         http://www.greenrooftechnology.com/case-studies

A Flower in Disguise

Green Team at Green Roof Technology, - Wednesday, January 02, 2013

By: Jörg Breuning & Samantha Yurek

"A weed is a plant that has mastered every survival skill except for learning how to grow in rows." - Doug Larson

 

Photo Jörg Breuning, Green Roof Service LLC: Hieracium aurantiacum, Orange Hawkweed. Haunted by environmentalists and often branded as obnoxious, farmers and nurseries stamp Hieracium as invasive.

It is all about perspectives, experience and evolution.  Weeds are typically plants growing where they are in competition with cultivated plants or simply unwanted by humans.  However, seeing it from a philosophical point of view any organism has a right to exist.  It is the intention of each organism to multiply, spread and adjust to the surrounding environmental conditions.  This adamant approach has also helped humans to develop and thrive over ten thousands of years.  The word native has become a stereotype of certain plants that should be growing in a particular region.  But with human perspectives being far from uniform, the term 'native' has been skewed over time.  The term is irrelevant when looking at the larger picture of evolution.

An unwanted plant on intensive green roofs could be ideal ground cover for un-irrigated extensive green roofs or vice versa.  Being an outside element, green roofs will undergo natural succession and evolution as described above.  This succession can effect the function of a green roof in the long run for the better or worse.  Ideally, maintaining a green roof helps to guide the plants in a stable coexistence with minimal succession, creating little maintenance.  In most cases it doesn't matter whether the green roof plants were planted intentionally or not.

Un-irrigated extensive green roof designs tend to have extreme conditions; therefore the plant pallet is rather narrow.  It is very difficult for most plants to sustain themselves over decades.  Introducing many of these so-called 'weeds' on to a rooftop environment may prove to be more efficient because of the vigorous growing capabilities.  Yet many factors such as unique weather events during the establishing phase (3-8 years), artificial irrigation, pre-grown nursery trays, excessive fertilization, can be counterproductive in modern green roof technology.

Happy New Green Roof Year

Green Team at Green Roof Technology, - Monday, December 31, 2012

Happy New Year!

by Jörg Breuning and Greenteam

- John Ruskin:

“It's unwise to pay too much, but it's worse to pay too little.
When you pay too much, you lose a little money - that's all. When you pay too little, you sometimes lose everything, because the thing you bought was incapable of doing the thing it was bought to do. 

The common law of business balance prohibits paying a little and getting a lot - it can't be done. If you deal with the lowest bidder, it is well to add something for the risk you run, and if you do that you will have enough to pay for something better.”

 

John Ruskin

John Ruskin is best known for his work as an art critic and social critic, but is remembered as an author, poet and artist as well. Ruskin's essays on art and architecture were extremely influential in the Victorian and Edwardian eras.

 

 

 

 

 

Solar Power (and Green Roofs) on the Rise!

Green Team at Green Roof Technology, - Friday, December 28, 2012

By: Samantha Yurek

 

Solar energy has been on a modest climb for most of its existence, but this year the solar power market jumped 71% compared to last year’s sales.  A growing renewable industry is a boost to our economy; over 93,000 Americans are employed within the solar business alone.  As the demand for solar installations grows higher, the prices will drop correspondingly.  This is already evident, in 2006 the price of a residential installation plummeted from $9 a watt down to $5.46 a watt.  Today we see prices around $ 4.00 per watt.

Even with the rise in solar sales, the US is still trailing behind Germany, Italy and Spain.  Around 20% of power in Germany is harvested from the sun only, but only around 11% of energy here in the Unites States comes from a collaboration of renewable resources (solar, wind, hydro, etc.).  Harvesting power from the sun is a smart idea.  Not only is the sun a renewable resource, but the process creates zero atmospheric emissions.  It’s clean and reliable!  Even with this spike in interest, solar power is still underused here in the United States because investors often look only at the capital costs. Capital costs of a Coal Power Plant are at around $ 2.10 (source Wikipedia) vs. around $ 4.00 for Solar.

Note that the capital costs are not the only determinant of the cost of the electricity produced. A coal plant needs to burn coal to produce power (a limited resource), while a solar panel and other renewable generation has no fuel input at all.

“Externality and insurance costs of energy sources” became in the 2010s recognized as equivalent to fuel costs as a decision factor. In particular for Nuclear and coal power plants but also for ground mounted Solar these costs can be deal breaking.

Roof mounted Solar power plants combined with a vegetated roof (extensive green roof) increases the capital costs by less than 20%. At the same time this marginal increase pays back in a short time due to the reduction in stormwater fees, reduction of the environmental foot print and recognizable increased in efficiency.

The synergetic combination of vegetated roof / Green Roofs with Solar is truly State-Of-The-Art and unmatched in modern green energy production and environmental protection.  

Common Sense

Green Team at Green Roof Technology, - Thursday, December 20, 2012

By: Jörg Breuning



Recently we have been receiving more and more calls regarding performance issues on extensive green roofs. Most of these roofs have been installed between 2-5 years ago by various green roof companies or supplied by different manufactures. Common complaints include dying plants, drainage system failure, growing media erosion and waterproofing leaks. Especially pre-vegetated systems (planters, trays, modules) mostly don’t meet expectations or even minimum requirements for green roofs. More often than not, green roof failures are the result of simple design or maintenance mistakes.

Many failures start within the design. A poor design leads to a snowballing effect of problems, growing and gaining velocity with every movement forward. Failures also occur during the construction phase when inexperienced installers claim a certain expertise because of a prior job, a way-back education or simply because they once watched a green roof installation. 

But problems can arise even sooner. We also noticed that many initial design and construction decisions are made ‘democratically’ or as a team consensus because no one person wants to carry the full responsibility on their own shoulders. Often these decisions are wrong and unrealistic. Physics, biology and chemistry are natural laws and cannot be compromised, even if done democratically.

Engineers must work within the parameters of reality and the best course of action is to always to use common sense.

In most cases things could be so easy if people would just use their own common sense and experience instead of believing all the nonsense they find on the internet.

Our commitment is to common sense, never nonsense. 




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