simuls
Senior Member
This is the type of thing that is a no brainer and Toronto needs to completely ignore the developers and just get some balls and mandate (with no exclusions for anyone). Oh no, $100 000 over 150 units - that's absolutely nothing to cry over. Charge $1000/unit and make money off of it - people will pay don't worry. The energy savings would pay for themselves in way less than 10 years and you'd have less pollution, heat island effect, longer roof life, etc. If a non-profit coop like Mountain Equipment can do it, then so can everyone else.
* Fraction of U.S. energy that goes toward cooling buildings: one-sixth
* Temperature of a conventional-roof membrane on a 95° F day: 158° F
* Temperature of a green-roof membrane on the same day: 77° F
* Heat loss of green roof as compared with conventional roof: 18% less
* Stormwater-retention rate of green roof as compared to conventional roofing material: up to six times greater
* Increase in sound insulation of a building: up to 8 decibels (ten decibels represent approximately twice-loudness).
The above doesn't even include heat retention rates either which will keep a building warmer in the winter!
* Fraction of U.S. energy that goes toward cooling buildings: one-sixth
* Temperature of a conventional-roof membrane on a 95° F day: 158° F
* Temperature of a green-roof membrane on the same day: 77° F
* Heat loss of green roof as compared with conventional roof: 18% less
* Stormwater-retention rate of green roof as compared to conventional roofing material: up to six times greater
* Increase in sound insulation of a building: up to 8 decibels (ten decibels represent approximately twice-loudness).
The above doesn't even include heat retention rates either which will keep a building warmer in the winter!