Construction Update - work activities on August 17 and 24/25

Rooftop stone removal and natural gas pipe adjustment

What we are doing

A component of the roof rehabilitation work currently underway at Greenwood Yard involves the removal of the rooftop pea-gravel and a slight height adjustment to the existing natural gas line (yellow pipe).

Next Steps (weather permitting)

  • On Saturday, August 17, the rooftop pea-gravel will be removed using a vacuum-truck. This method of removal is efficient and quick, and helps reduce the possible build up of dust from the work site. The vacuum truck will be parked and operate from inside the yard. The sound from the gravel and from the truck will be audible when in full operation.
  • On the following weekend, August 24/25, work to adjust the height of the natural gas pipe will be undertaken. The initial step involves isolating the gas line and “bleeding” the line to ensure that the pipe is clear of gas. This activity will be a controlled process and will generate some odour associated with the smell of natural gas (rotten egg).


  • During the “bleeding” of the natural gas line, a rotten egg odour is to be expected and may be noticeable in the immediate area for a short period of time.

Work hours

  • Work associated with the pea-gravel removal will take place during daytime hours from 9 a.m. to 5 p.m. on Saturday, August 17, 2019.
  • Work related to the gas line height adjustment will take place over the August 24/25 weekend, from 7 a.m. to 6 p.m. both days.
  • In the event of inclement weather, the work will be rescheduled for the next best available date without notice.

What we are doing and why

Starting in the month of August, TTC will begin work on a section of a roof at Greenwood Yard in the general area of Felstead Avenue and Mountalan Avenue. This project is scheduled for completion in early January 2020.

  • The early stages of work will involve the installation of safety guard rails along the perimeter of the roof in preparation of roof rehabilitation.
  • The work will include the removal and installation of new roof flashings along the roof wall, removal of the old roof material and application of new roof material. A new roof walkway system, roof drains, a guardrail, and new stair access will also be built.
  • The existing roof-top ventilation units will also be replaced.

Work hours

Work will typically take place during daytime hours of 7 a.m. to 7 p.m., on weekdays. As well, on Saturdays between 9 a.m. and 5 p.m.


The traditional method of liquid asphalt application (asphalt kettle) is not being used. The roofing system used is a 3-ply membrane applied with heat and produces less odour.

Dust and noise

Dust will be controlled as much as possible. A mesh covering will be placed on the chain-link fence along Greenwood Avenue. Efforts will be made to keep noise to a minimum.

Contractor’s compound and deliveries

The contractor has been provided with a designated location inside the yard for staging, access to the roof, material storage and disposal bin. Due to the limited space in the yard, material/supply deliveries for this project will be scheduled after 5 p.m. on most work days. Some supplies will be stored on the roof. Deliveries and disposal access will be via the main gate on Greenwood Avenue.

Every effort will be made to complete the project as quickly as possible.

For further information:

Diego Sinagoga, Senior Community Liaison, 416-393-2197;