Newer minds have taken the rooftop greenhouse concept and built a business model for using the rooftop greenhouse not as a research center but as a commercial production greenhouse to supply the local market.
Green roof and greenhouse differences.
On the other hand an open greenhouse roof allows fresh air in the hot months.
Green roof temperatures can be 30 40 f lower than those of conventional roofs and can reduce city wide ambient temperatures by up to 5 f.
The second and even newer concept to take hold in the urban agricultural movement is what has come to be known as vertical farming.
It s a good choice for greenhouse roofs walls and doors due to its ability to handle fluctuating temperatures but shouldn t be used on roofs where snow loads or high winds are a concern.
Tempered glass is much stronger than annealed glass due to the extra processes of treatment it endures.
Green greenhouses may sell because they look nice and still transmit about half of the par radiation but a 50 shade cloth would produce far more cooling inside the greenhouse without reducing par one bit more.
1 2 in addition green roofs can reduce building energy use by 0 7 compared to conventional roofs reducing peak electricity demand and leading to an annual savings of 0 23 per square foot of the roof.
Available in clear frosted or green fiberglass panels run about 1 to 2 per square foot.
Fiberglass panels are commonly used to cover greenhouses as they are durable lasting for up to 20 years.