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Health Care and Green Infrastructure

Green Team at Green Roof Technology, - Thursday, June 01, 2017

State of the Art Health Care and Green Infrastructure

BG Hospital Tübingen A hospital with LEED certification might be far away from State-of-the-Art. That it can be done differently and with commons sense shows the featured project. It has been upgraded constantly over the last 5 decades, always with Green Infrastructure in mind as a central element to reduce the footprint of the building and the increase the well-being of the patients.
This project likely increases LEED Platinum by 30%, but no Dollar or Cent was wasted for any certification. All money was directly invested in measurements to improve the environmental foot print and to increase the patients experience, that they can leave the hospital as soon as possible.

American Hospitals typically want to shine with their LEED points and assume that patients like this idea. Unfortunately this doesn't help in their healing process, actually keeps them longer in hospital - what helps the hospitals having more occupied beds and more income. The patients pay for the ego of the hospitals likely twice (not State-of-the-Art!).
BG Hospital Tübingen: The BG Hospital Tübingen is one of the largest trauma centers in Germany. 

Initially designed as follow-up clinic, it has been working closely with the neighboring Eberhard Karls University of Tübingen and its university hospital. 
In 1987, the collaboration became contractual: within the scope of the “Tübinger Modell”, the clinic takes care of the treatment of patients, as well as of research and teaching in the fields of trauma, hand, plastic and burn surgery. In 2006, this very successful model was expanded to the fields of oral, jaw and facial surgery, which have since been integrated into the BG hospital. The Siegfried Weller Institute for Traumatological Surgery at the BG hospital Tübingen works on a wide range of innovative projects. The work done by interdisciplinary teams focuses on bone metabolism diseases and stem cell research.

Germany has a universal multi-payer health care system with two main types of health insurance: "Statutory Health Insurance" (Gesetzliche Krankenversicherung) known as sickness funds (Krankenkassen) and "Private Health Insurance" (Private Krankenversicherung). Germany's state healthcare system is the oldest in Europe, dating back to the 1880s. Citizens pay into one of the 300 statutory state sickness funds through their payroll or bank. According to the Euro health consumer index, which placed it in 7th position in its 2015 survey, Germany has long had the most restriction-free and consumer-oriented healthcare system in Europe. Patients are allowed to seek almost any type of care they wish whenever they want it.
Please find a larger picture here: https://www.linkedin.com/pulse/state-art-health-care-green-infrastructure-jorg-breuning Jorg Breuning www.greenrooftechnology.com

United States of America and Green Roofs

Green Team at Green Roof Technology, - Tuesday, June 14, 2016

Construction Going Up – Ecology Going Down?

From 2010 to 2015 warehouse new construction in the US tippled from around $5 Billion to $15 Billion with all the economic benefits. 15 Billion in new construction equals around 1000 new warehouses every year or approximately 250 million square feet rooftops plus the same amount of infrastructure provision. Annually, 500 Million square feet or 8800 football fields of lost nature by building new warehouses in the United States alone.

Green Roofs in North America?

With some of the existing warehouses, this translates to a potential of at least 1 Billion of square feet of new extensive Green Roofs every year that could retain the volume of Lake Constance that is surrounded by three countries (Germany, Switzerland and Austria) or over the double volume of Lake Powell (UT/AZ)!

Assuming that these Green Roofs are done right, maintained by professionals and without artificial irrigation, the natural and controlled succession of these Green Roofs would allow a unique habitat for many endangered species over the upcoming years.

These green roofs can also reduce the re-roofing costs by multiple billion Dollars with a related relieve for landfills and a huge reduction in energy use.

Most important however is the climate effect.

Warehouse belts surround any large city in North America. These warehouse belts with endless impervious areas actually preheat the air that is conveyed into our cities by the wind. In the worst-case scenario, these large warehouses have reflective roofing membranes that might cool the building but also increase – due to reflection – the heat in the atmosphere substantially.

Warehouse belts around cities are like a forced air heating system in a building only on a much larger scale – Warehouse belts are a wasteful forced air heating system for entire cities

Fundamental sustainable thinking and large scale long-term research hardly exists in the US, so it is no wonder that experts are likely to miss the entire picture.

Currently in the US there are no significant requirements or ecological considerations in master plans that address this counterproductive climate habits towards our cities. Actually, it seems that warehouse belts grow faster than Green Roofs!

North American ecological organizations, LEED, or other industry associations are also missing the bigger picture. They often work locally – from one block to the next, they are focused on one or two rare plants, on a distinctive bee species, butterflies or other human pleasing critters as long as there is an instant payback in popularity. It seems worth more having a highly unsustainable fully irrigated Green Wall in the cafeteria, a nice green plaque on the wall, or growing some carrots on the roof to demonstrate social and sustainable responsibility. Most marketing efforts for green washing are beyond the costs of a simple highly efficient extensive Green Roof that helps the future generations.    

Warehouse belts are heating American cities

The United States is a great country and North America is a large continent where thinking big was always wanted and welcome. Now it seems people are getting lost in their little plastic boxes, made in China with some nice flowers and a watering can next to it.

It is very romantic but also very embarrassing.

Green Roof Failures

Green Team at Green Roof Technology, - Wednesday, May 18, 2016

Do Green Roof Failures increase with Roofing Manufacturers?


 

 

In the last two days I visited four of my projects that are between 14 years and 1 year old.

Each of these Green Roof has an own interstesting history and with the exception of the “cozy” Green Roof, each of the extensive green roof host over 25 and 40 plant species in excellent health.

None of them was ever irrigated and the oldest was fertilized the last time 10 years ago. All of them require hardly any maintenance (2 hours per 5,000sf / year).  One Green Roof is maintained only once every 3 years.

 

For these amazing, inexpensive and resilient green roofs a special thank to all who participated!

 

In contrast:

I was on one roof that was installed and maintained by a roofing company with materials from a famous roofing manufacturer.   This roof is basically going down the drain because of incompetence, sloppy work, and inappropriate materials.

This roof came with a costly single source warranty that –as always – doesn’t cover anything of the green roof. The cost for this worthless application was around 25% higher than a fully functioning Green Roof from well trained gardeners.

 

This is one of many projects around the Nation where I am questioning myself whether roofing manufactures and roofing companies should work in the Green Roof field. As a matter of fact in last decade 90% of roofing manufacturers offered Green Roof Systems that consistently underperform or that are not maintained properly. Actually most of these manufactures changed their systems and approaches to Green Roofs more often than they changed the management of these multi-million Dollar corporations. 

While many of these manager focuses on how increase revenue and some of them how to fix the problems with Green Roofs their quality of the waterproofing and craftsmanship of their installations went down. Striving for more revenue is not a wrong thing in general but when this is done on the backbone of the Green Roof industry and our all prospect clients it is more than questionable.

As client you have to figure out whether it is more important to make unknown stockholder happy or yourself.

I don’t fall for roofing warranties and sales forces with nice brochure

This particular roof will be recovered by an extensive weekly maintenance program until the end of the year and a monthly maintenance program for the entire next year!  

First Extensive Green Roof in the Dominican Republic

Green Team at Green Roof Technology, - Thursday, January 21, 2016

First Extensive Green Roof in the Dominican Republic.

More than 12 years ago my friends Miriam and Buschi decided to settle in Las Terrenas, Dominican Republic to educate the local people and tourists about animal welfare and a better interaction between humans and animals.

An awesome story that has grown and created support from all around the world. Universities, veterinarians and engaged individuals from North America and Europe spend their free time by helping them with hard work and donations, making a better life for animals and humans.

 

Beside their endless efforts for animal welfare their home has two large extensive green roofs that flourish since 12 years. It is quite an effort finding the right plants that can survive on less than 3 inch of soil mix. A thick, flexible, non-bituminous and root resistant waterproofing is the only German product of the green roof system. All other components were sourced locally and evolved over the years.

 

These green roofs are the first in the Dominican Republic and represent the basics of modern green roof technology – simple and effective without plastic elements or pre-planted containers.    

http://www.amigos-de-lucky.org/

https://www.facebook.com/Amigos.de.Lucky


 

Fireworks, Green Roofs and Happy New Year!

Green Team at Green Roof Technology, - Thursday, December 31, 2015

 

Fireworks, Green Roofs and Happy New Year!

Practically all dry organic materials are combustible at relative low temperatures. Roof shingles or many waterproofing membranes on roofs are typically petroleum-based products (including Asphalt) and there is hardly a difference to dry organic materials. Some products are equipped with chemical fire retardants that could decrease the risk of spreading fire, not the risk of leaks cause by impact.

The living vegetation of functional and well-engineered green roofs contain moisture and most plants (especially succulent plants on large extensive green roofs) have a fraction of the energetic potential comparing to all other components used in a building. The green roof growing media (soil for the green roof plants) is a blend of different mineral components with an organic content of typically less that 15%. It is practically impossible to set this material on fire – not even considering its natural moisture content.

Potential fires or leaks on roofs caused by consumer or display fireworks can be prevented if the building has a fully functional green roof.

A fire on any roof is the worst-case scenario. I many cases smoldering firework parts (and cigarettes) are causing leaks on unprotected roofs that are discovered much later. These problems are unknown on fully functional green roofs. When a green roof prevents a leak or even a fire it is typically not recognized but will save expensive repair or even loss of a building.

Nature is (literally) so cool.

Happy and successful green 2016!

 

Zero Run-Off for 20 Years

Green Team at Green Roof Technology, - Sunday, December 06, 2015

Zero Run-Off for 20 Years!

 

The Kriegbaum Logistic Center and production facility is located in southwest Germany. This extensive Green Roof in Bondorf was designed by Stötzer + Neher Landscape Architects primarily as a nature roof for advanced water retention.

This project demonstrates over 2 decades using Green Roofs as a storm water management tool. The entire complex containing the two huge warehouses and adjacent parking areas has no (zero) run-off to the sewer system. All rainwater is retained, treated and infiltrated into the ground water on-site. All components were tested to avoid any contamination of the ground water. The infiltration water (run-off) is consistently tested for water quality. Since the project often has no run-off it is impossible to perform water tests – no run-off = no pollution.

Installation of this 14 acre green roof was a special challenge since it had to be completed within 10 weeks. This could only be achieved by having 4 state of the art blower trucks on site working constantly to apply the 10,000 cubic yards of growing media on the roof (up to 500 cubic yards a day). With a 150-ton hydraulic crane, all the other components (almost 100 truck loads / 3 per day) were conveyed to the roof area.

To increase biodiversity there are multiple locations on the roof with seasonal open water, wood locks and breeding opportunities for birds.

The project saved the building owner around 2 million Euros for increasing the water treatment plant and sewer system.


North America in contrast:

 

From 2010 to 2015 warehouse new construction in the US tippled from around $5 billion to 15 Billion this equals around 1000 new warehouses every year and translates to a potential of at least 1 Billion of square feet of extensive Green Roofs that could retain the volume of Lake Constance that is surrounded by three countries (Germany, Switzerland and Austria). On top of that and if these Green Roofs are done right and without irrigation, these Green Roofs would allow a controlled succession that could develop over the years to a unique habitat for many endangered species.

As the nationwide building codes require expensive engineered fire suppression systems the same building codes can require simple and highly efficient Green Roofs. Unfortunately most Green Roof or other environmental organizations don’t focus the low cost, high efficient simplicity – they focus on adding carrots or a rare native plant species to an environment that is far away from being connected to the ground.

Common sense exists as term but it isn’t in the head of most people because it doesn’t generate the attention and “individualism”.

The Best Green Roof System

Green Team at Green Roof Technology, - Saturday, August 01, 2015

The main purpose of an extensive Green Roof is stormwater retention and delaying stormwater runoff amongst many other added values.

Above: An Irrigated thin layered Green Roof System – without irrigation it would be dead.

In the last decade in North America, we've seen many Green Roofs where the intended plants never really flourished. I estimate that in the US at least 50% of the green roofs are not performing to their fullest potential. This can be observed by simply looking at the most obvious of indicators, the plants themselves, regardless if they were planted on purpose or somehow found the space to take root. 

Most of these less healthy extensive Green Roofs are thin-layered systems, pre-planted boxes (often called modular systems or hybrid systems), Green Roof Systems from roofing manufacturers with ineffective components, single source warranty-systems, or design intents without consideration for the needs of plants. Typically these systems much more costly (whether thin or thicker) and the mid to long term results are often far below systems that are assembled in place with common sense.

 

Thin-Layered system with irrigation - doesn't work and doesn't retain much water

We all know that the transition from being a common nursery-grown plant (including pre-planted boxes) to the extreme environment of a rooftop poses severe challenges. Green roof plant nurseries typically have "great" advice and recommend the installation of temporary or permanent irrigation systems. In some areas this might be helpful when operated correctly but in all cases this advice is defeating the purpose of an extensive Green Roof (water retention). In almost all cases any type of irrigation caused a spiral of failures and it is wrong to irrigate extensive Green Roofs in areas with limited water for the cause of just having a green roof (Green Washing). Most company sponsored experts don’t see the entire picture or they only see the short term profit and commission (“Mow-Blow-Go”).

If a problem occurs and since many Green Roof system developer lack the proper and specific green roof horticultural knowledge, they may not be able to identify problems by simply looking at the indicators (the plants). This could cause the problem to gain momentum. In addition, the false conclusion that technology (Google search, Apps, synthetic growth media or sophisticated soil moisture control devices) can fix the problem supports my theory of hardly experienced or misinformed green roof professionals. They rely heavily on technology to fix any issues and miss the big picture.

Nature has the ability to take care of itself, as long as the appropriate design, materials and plants are used in addition to being familiar with the immediate location and climate.

Thin layered, super lightweight systems or systems with “innovative” components are just by physics not meant to retain “more” stormwater for the plants or they retain too much water for specific plants. As a matter of fact the costs for retaining stormwater in thin layered systems are extremely high comparing to a standardized extensive Green Roof with a thickness of 4-6 inch (depending on location). Besides the initial costs the lack of water retention (don’t forget all studies are done by the companies!) won’t support any significant bio diversity plus the operational costs (because of the required irrigation) are tremendous over time. Typically these Green Roofs never pay back with they are not utilized for “Green Washing” purposes in advertising.  

Irrigated extensive Green Roofs and/or thin layered, super lightweight systems (below 25 lbs/sf) will increase the nutrient pollution in runoff, require higher fertilization application, have hardly any tendency for self-healing, and may increase the pressure of unwanted plants and have a high risk for failure. Irrigated extensive Green Roofs are not environmentally friendly in most loactions!

Green roof designers and green roof professionals must understand that certain advertising, studies, White Papers or project references are all assembled by specific manufacturers and their goal is to make money – unfortunately on the back of a very advanced technology and on the back of their clients.

When we advise our clients they get the full picture because we have seem all solutions in the last 35 years, we have tested them and we are currently working millions of square feet where these systems require upgrades, reinstallation or massive repair (around 20 million in damage so far).

We also help our clients doing it as efficient as possible and to get their money back from prior failures through warranty claims and sophisticated lawsuits. This might help to standardize the function of Green Roofs and helps to get the black sheep out of the market. The building owner has a right that things are done right from the beginning.

Never irrigated in the last 10 years.

Leading Green Infrastructure since almost 150 Years!

Green Team at Green Roof Technology, - Friday, July 10, 2015
 Leading Green Infrastructure since almost 150 Years!

Stuttgarter Nachrichten

Picture: Stuttgarter Nachrichten


Living Green is not just an empty phrase for City of Stuttgart, Germany.  The history goes back almost 150 years as the “Stuttgarter Verschönerungs Verein” was founded. A powerful Association with an authority comparing to today’s City Department of Parks and Recreation. Even during the Nazi-Time the Association was entirely independent and was able to protect historical buildings, Parks and to increase living green with new parks and living green recreational areas.

Based on this history it was no accident that Stuttgart is the pioneer of an unmatched progressive Green Roof program in the 1980’s and the City of Stuttgart is still the leader with the most Green Roofs in the world.

Just recently the City revised the Building regulations for the entire State Baden-Württemberg that every building owner has to implement more living green. A controversial discussed item in politics because some people understood that as forcing Green Infrastructure – but it was meant to inspire building owners to value Green Infrastructure as an investment for the future with related high savings for operational costs.

In an newspaper article of Stuttgarter Nachrichten the new building requirements are explained including the benefits for the local infrastructure and the lasts high demand for well trained and educated Landscape people.

I was very excited to see that they used a current picture of a Green Roof project I installed in 1999/2000.

This Green Roof is a demonstrating project at a landscape company and covers their truck parking. The depth of the Green Roof reaches between 4 inch to 12 inch – from Sedums, perennials, shrubs to trees that grow over 15 feet. Since it is on a roof the reflecting pond is rather shallow, has a water feature and is lit up at night to create a private out door space for the company owner. The City of Stuttgart, Germany is a place where ecology and economy is closer together than in any other place on Earth I know.

2001all rights Jörg Breuning
Picture: Jorg Breuning taken one year after installation

15 Million Square Feet of Green Roofs in 2 days!

Green Team at Green Roof Technology, - Monday, April 06, 2015

Over 15 Million square feet of Green Roofs in 2 days!

In the World’s Green Roof capitol it isn’t a problem to walk over 15 million square feet of Green Roofs in two days.
Grinnell College Students, Architects and Professors joined me this year on a two day trip though out Stuttgart Germany.

Within the city limits and a population of around 700,000, Stuttgart can offer likely over 200 millions square feet of extensive and highly divers Green Roofs – more than the entire USA and probably Canada together.

The two days tour emphasized Green Roofs that are between 15 and 30 years old and that host over 40 different plants species. Remarkable is that not a single Green Roof was ever irrigated, nor fertilized in the last 10-15 years and most of them are maintained only once a year.

No Green Roof was ever replaced or fixed and the water proofing under all Green roofs never, ever leaked (in the US 50% of the green roof are getting fixed or replaced in the first 5 years). The average installation costs were at around $4-6/sf (in the US around $12-18/sf).

All Green Roofs have three major functions: stormwater retention, stormwater retention and stormwater retention.

Green Roofs in Stuttgart are part of a building like windows or doors. There is no necessity to make a big fuss out of it.
Being the World Champion in modern Green Roof technology is nothing to celebrate – it is the responsibility of sustainable and environmental conscious lifestyle combine with common sense.

The highlight of the tour was the Bosch Parking Garage with the world’s largest Solar Green Roof that was designed with extremely high diversity of plants that are found only in (local) native dry meadows.
While the Green Roof measures around ¼ Million square feet the PV is designed for 1 Megawatt.
Unmatched world record in this combination on building structure that is 100 feet above a 6 lane Highway.

Extensive Green Roofs and Irrigation

Green Team at Green Roof Technology, - Tuesday, November 04, 2014

Thank you for all the comments on the blog post:

Irrigation on Extensive Green Roofs

 

We believe a lot of people in North America agree with the comment that in some areas Green Roofs can't thrive without irrigation. We at Green Roof Technology don’t disagree nor agree. Allow us to bring the discussion into a fundamental perspective:  

Before you built a structure, you have to remove nature or simpler living plants that nobody watered before. Modern green roof technology is able to mimic this type of environment and allows to promote exactly this drought tolerant and hardy vegetation. With a little more understanding of this technology, it is even possible to increase the plant varieties or the plants density.

Nevertheless  the attractivity might not meet the expectations of us (humans). Our picture in mind of a roof garden is a lush green vegetation form that is created with plants that please us (humans), that are not poison or dangerous. In some areas we can achieve this goal by utilizing resources that haven’t been available at this location before the structure was built.

By using natural resources (and water is the most valuable) we start changing our environment (we take water away from somewhere – from plants somewhere) just for our own comfort. Understanding that and the value of water should create an awareness to green roof professionals or engineers to design modern green roof technology in a way that no water or super highly restricted amounts of water are utilized.

Unfortunately, the irrigation industry and most of the green roof designers grew up in an environment where resources are endless. With that said the current waste of water on green roofs is simply not acceptable to me and in these cases green roofs are an environmental nightmare - just for our pleasure (and cash) and that things look “nice and green”.   

When I drive around in neighborhoods in San Francisco in the morning, my car is being washed by all the sprinklers and nobody has a problem with that…..

Simple and efficient technology is here since many decades but not in the interest of the industry, nor “re-invented” in the US or there is a lack of common sense – maybe it is a combination of all.

Most issues I am confronted with, are a result of high tech irrigation that is just not doing what it is supposed to do, there is not the right app, poorly designed and installed, too complicated for facility people etc. or simply drains the budget of building owners over time this water costs are going up.

Let’s discuss further and email us directly: info@greenroofservice.com

 

Comment by Jure Šumi ((LinkedIn):

 
Interesting input Jorg. Yes, extensive roofs should be self-sufficient where they can be. But in my mind this is not possible in really arid areas like Jim is saying. With our partners in Abu Dhabi we are now investigating what plants should be used there, where top temperatures are regularly reaching 120 F in summer months (with no rain for years). If you use local plants that are surviving in desert than they are surviving only due to the fact that the roots are extremely long and go deep in to the ground to find some moisture (not possible on the roof). Limited irrigation is still needed but the roof needs design with minimised ET, so also irrigation is as low as possible.

Maybe another thing to consider. Yes or no irrigation is also a question of what someone wants from green roof. Nice look is one aspect, stormwater managment is another. We should not forget Energy efficiency. According to our investigation and perfromance tests, evaporation has big effect on energy efficiency in the summer due to cooling effect. If moisture in the green roof system drops below certain level, the cooling effect is limited. So to have best energy perfromance of the roof, than you need irrigation.

 

Response Jörg Breuning:

Thank you Jure.

My starting point of thoughts about irrigation on extensive green roofs goes back to a fundamental point and only a handful people make these considerations.

Humans are capable to replace nature with a manmade structure on any location on Earth and they make it suitable for people to live there. In these fundamental thoughts, I expect that humans are also able to create this lost part of nature on top of these structures.

I agree this is not always cheap and not everybody is blessed with creativity or experience. Nevertheless, it is possible and it is our responsibility if we respect nature.

The rooting depth of plants is certainly a key element - it isn’t a road block. It seems it is the preferred excuse that we don’t need to feel responsible in what we re doing and that we don’t feel guilty.

I also think it using water for cooling buildings in an open system (what any green roof is) is considered - in my world - using elementary, limited and precious resources for our convenience. In the case that producing water (in dessert states) for the wasteful irrigation of plants (to make our close environment nice) might be a problem to justify to more than 100 million people that have no access to dependable water resources.

What I am saying is, that growing plants even in areas where plants would hardly grow can be done with extremely low impact on natural, precious resources at costs that are lower in the short or long term. The current hype for green roofs can create significant drawbacks in 15 or 20 years from now to building owners if the costs of water continue to rise. Keep in mind a 20 year old green roof is not even the half of the life span of a green roof (at least that is what I know from experience).

Professionals need to start thinking long term and not for quick profit, they should disregard fancy fashions or get away from desperate LEED point collecting terms if they seriously respect nature. 

Jörg Breuning

 

Picture: Deep rooting plant on roof with hardly any soil and never intentially planted (in Texas at the border to Mexico).


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