Toronto Green Roof Standards

Green roof construction standard whether constructing a green roof voluntarily or as required by the green roof bylaw all green roofs in the city of toronto at a minimum must conform to the toronto green roof construction standard.

Toronto green roof standards.

Tier 2 3 and 4 higher performance levels are voluntary and are associated with financial incentives. Complete in conjunction with the full toronto green standard version 3 0 tgs v3 0 and specifications. Tier 1 of the toronto green standard is a mandatory requirement of the planning approval process. The green roof bylaw sets out a graduated green roof requirement for new development or additions greater than 2 000 m gross floor area as well as governing the construction standards of green roofs.

The tgrcs establishes the city s requirements while also meeting the ontario building code obc requirements. A green roof assembly includes as a minimum a root repellent system a drainage system a filtering layer a growing medium and plants and shall be installed on a waterproof membrane of an. The standard consists of tiers tiers 1 to 4 of performance measures with supporting guidelines that promote sustainable site and building design. Toronto s green roof bylaw defines a green roof is an extension of an above grade roof built on top of a human made structure that allows vegetation to grow in a growing medium and which is designed constructed and maintained in accordance with the toronto green roof construction standard.

The toronto green roof construction standard tgrcs is the first municipal standard in north america to establish the minimum requirements for the design and construction of green roofs. The standard can be found in article iv of the green roof bylaw municipal code chapter 492 green roofs. Tier 1 performance measures are required by the city and must be included as part of your approved development application.