Tonight was the coldest night of the year with freezing temperatures reaching all the way down into south central Florida. It is still in the low to mid twenties in Jacksonville at 5:33 am.
Green roof plants have taken the brunt of the cold - sitting up on a roof, dessicated by the never relenting north winds, unprotected and exposed.
These same plants must survive in the extreme temperatures and humidity levels of the summer also.
I will be posting pictures later this weekend. Some of the plants are bit back and scarred, some may have died - but others are doing OK.
My favorite - Allium species - is a testimony to successful green roof plants....it never fails.
Post your results here too!
Happy Green Roofing - Kevin.
Healing Powers of Medical Qigong especially for seniors & those challenged with trauma from stroke and cancer. Traditional Chinese Medicine (TCM), Acupuncture, Chinese Herbs, Ancient Medical Tattooing & Yang Sheng, Nature Art & Music. Blogging about how to grow, obtain & create your survival medicine supply.
Showing posts with label green roofs save energy. Show all posts
Showing posts with label green roofs save energy. Show all posts
Friday, February 6, 2009
The Stress of Cold - Frosts and Freezes - on Florida Green Roofs
Monday, November 17, 2008
Green Roofs in Florida and the Southeastern US. Insulation values for real?
We can all assume that thick intensive green (vegetated roofs) provide a measure of insulation - but what about thinner, extensive green roofs? Do extensive green roofs, say 2 to 4 inches thick provide insulation benefits?
Jincy, Ruairi and I have tracked the insulating factors of several extensive roofs, comprised of the MetroVerde mat roof system during the 2008 summer season.
What we found was very interesting.
Using a Extech Infrared IRC40 thermal imaging unit we measured the temperature of the roof decking undersides for roofs with (A) extensive 3" thick mat based vegetated roofs planted with allium and iceplant, and (B) asphalt shingle covered decking.
Not surprisingly, the underneath of the roof decking on asphalt shingle roofs averaged 125 - 130 degrees F during July, August and September 2008.
Temperatures of the undersides of the roof decking below asphalt shingles covered with the MetroVerde extensive mat systems averaged 84 - 86 degrees F at the same time of day.
Moreover, it is expected that the green roof mat system will protect the asphalt shingles from solar degradation.
So do extensive green roofs insulate a roof from solar gain? The answer is an undeniable Yes!
Jincy, Ruairi and I have tracked the insulating factors of several extensive roofs, comprised of the MetroVerde mat roof system during the 2008 summer season.
What we found was very interesting.
Using a Extech Infrared IRC40 thermal imaging unit we measured the temperature of the roof decking undersides for roofs with (A) extensive 3" thick mat based vegetated roofs planted with allium and iceplant, and (B) asphalt shingle covered decking.
Not surprisingly, the underneath of the roof decking on asphalt shingle roofs averaged 125 - 130 degrees F during July, August and September 2008.
Temperatures of the undersides of the roof decking below asphalt shingles covered with the MetroVerde extensive mat systems averaged 84 - 86 degrees F at the same time of day.
Moreover, it is expected that the green roof mat system will protect the asphalt shingles from solar degradation.
So do extensive green roofs insulate a roof from solar gain? The answer is an undeniable Yes!
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