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City Roofing & Exteriors
Aerial view of the Northwest Tank Lines building in Calgary with the new flat roof going on

Northwest Tank Lines, Calgary

A new torch-on roof on an industrial building.

A $175,000 commercial flat roof replacement in Calgary. Our own crew put a new two-ply torch-on roof on both sections of the building, with every vent stack flashed into the membrane.

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  • Industrial building, Calgary
  • $175,000 project
  • Two-ply torch-on
  • Every vent stack flashed

What the job needed

The roof has rows of vent stacks across it, and every one of them is a place a flat roof can leak. Each one had to be flashed into the new membrane.

How we did it

Base sheet being rolled out at the roof edge on the Northwest Tank Lines job, vent stacks flashed
  1. New board, fastened down

    New board went down across the roof and was fastened to the deck.

  2. Base sheet

    A torch-on base sheet over the whole roof, run up and around every vent stack.

  3. Cap sheet

    The granulated cap sheet torched over the base, lap by lap.

  4. Both sections finished

    Both roof sections finished the same way, with the rooftop units sealed in.

Planning a roof like this one?

Call 403-608-9933, Monday to Saturday, 8 to 7, or send the form. Tell us the building, roughly how big the roof is and what prompted the call.