
Chaz came up with a suggestion to pursue a green roof for our two large porches. One over the entrance and one overlooking the backyard. All together it is about 500 feet of roof space to cover. We hit the Google tubes and began some serious research on current providers, green roof benefits, and the co$t. In our case, the main focus was to establish an enhanced view for guests from the second floor while also reducing rainwater runoff, dampening sound, and increasing the lifespan of each roof.
Pictures like this made it seem like something far too complicated for our small application. But never fear!

Green roofs (depending on application) have a number of benefits as listed on sites researched through the power of the internet. We tried to edit it down to just a few listed below.
Social Benefits
Improved livability.
Improved physical and mental health from exposure to nature.
Aesthetic Benefits
Green roofs are much better looking than asphalt, gravel or tar.
Natural views create more productive, healthy, happy, creative, relaxed people.
Green roofs expand the usefulness of buildings via patios, gardens and vistas.
Environmental Benefits
Urban Heat Island Mitigation--The urban heat island effect is the temperature difference between urban areas and their rural surroundings. The temperature differential causes air currents and dust, and even contributes to violent weather events within urban settings. Green roof vegetation helps by cooling the air, slowing air movement and acting as a substrate for pollution to settle out and detoxify.
Noise Reduction
Plants, soil, and air trapped in the soil are great acoustic insulators. Tests indicate that green roofs can reduce indoor sound by as much as 40 decibels, which is of great benefit to occupants of buildings affected by airports, industry, trains and traffic.
Fire Prevention & Construction Advantages
Succulent green roof plants help reduce the risk of fire.
Green roofs protect exterior roof membranes from ultraviolet radiation, extreme temperature fluctuations, punctures and other physical damage and extend the life of a roof.
Water Conservation/Reduction of Storm Water Runoff
The soil in green roof systems acts like a sponge and absorbs excess rain water. Green roofs reduce the impact of each new building on the municipal storm drainage system and surrounding watershed. They reduce flooding, erosion and artificial heating of water which helps preserve fisheries and other aquatic life.
Green roofs filter water prior to returning it to the aquifer. They buffer acid rain and remove nitrate pollution as water slowly percolates through the soil. What runoff remains will usually occur hours after peak flows, providing additional time for sewer systems to handle the runoff burden from impervious surfaces.
Habitat Recreation
Plants and soil help recreate habitat for butterflies, insects, and songbirds.
So aside from setting a great example, we find some direct benefits for our project as well. Right now we are looking at quotes from the following two providers, plus weighing the costs to create our own system using materials and plants purchased locally. We will blog further as things develop and we narrow down our options to have something in place for opening.

GreenGrid Roofs

LiveRoof
7 comments:
Quote from LiveRoof came in tonight. Will review and post results here soon.
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Does the green roof add considerable weight to the existing structure? Do you have to reinforce the existing roof to handle the weight? I was just thinking about 2 feet of snow sitting on top of how ever many square feet of plants, etc.
Would hate to see it damage the porch roofs over time.
The weight issues has been discussed. These systems add anywhere from 10-25 pounds per square foot, but there are a lot of variables. Depth of trays, proper irrigation so water is not held, etc.
We are going to sit down to compare quotes from GreenGrid and LiveRoof tonight. As a rule of thumb you can estimate $20-25 per square foot from these companies. LiveRoof requires installation by certified installer as well. More as we sort through the requirements...
So we have looked at two of the most prominent green roof providers. Both systems have a number of benefits, but we are left to investigate a self installation option as well. The cost of a the pre-grown panels does add up quickly--over $10,000, so now we are looking at components.
The trays available from Geo Products might be a good start. The Geodren trays allow for self installation.
http://www.geoproductscorp.com/en/prodotti/geodren.html
Wow, I didn't know green roofs had a lot of benefits. They are eco-friendly and healthy at the same time. Your plant selection is pretty cool. I think I will try that makeover for my roof.
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