Roof Repair in Vaughan: Large Subdivision Roofs Reaching the End of Their First Life

What fails on a large subdivision roof

Valleys carry the water from two slopes and wear through first, especially where the builder used a closed-cut valley with no metal. Step flashing at dormer walls, counter-flashing at chimneys and the curbs around skylights fail as the sealant ages and the metal corrodes. Pipe boots crack in the sun. In the field, builder-grade shingles show curling edges, granule loss and wind-lifted tabs by fifteen to twenty years, and the north slopes under mature trees grow moss.

Attic ventilation on a big roof is often inadequate for its volume, and bathroom fans that vent into the attic instead of outside grow ice dams in winter and cook the shingles in summer. A good roofer looks in the attic before quoting.

After a storm: the order to do things in

First, stop active leaks with a tarp and keep the receipt; insurers normally cover emergency mitigation. Second, photograph the damage from the ground and inside the attic. Third, if the damage is more than a few tabs, open an insurance claim before agreeing to permanent work, because most policies want the adjuster to see it first. Fourth, get written quotes from two or three Vaughan roofers with a permanent local address and compare their scope with the adjuster’s.

A roofer who knocks after a storm, quotes a full replacement from the driveway, or asks you to sign an assignment of benefits is asking for control of your claim. Keep it in your name and pay the roofer yourself on completion.

• Dated photos of the damage, outside and in the attic
• Emergency tarp receipts
• Insurance claim number and adjuster contact
• Two or three written quotes naming the failure points
• Company’s permanent address and years in business

What Ontario requires, and what you should

Roofing is not a licensed trade in Ontario, so ask for a certificate of liability insurance naming the company and a WSIB clearance certificate, and verify both with the issuer; a worker injured on your roof without coverage becomes your liability. Like-for-like re-shingling generally does not need a City of Vaughan building permit, but deck replacement, structural changes and new skylights can. Ask the roofer and confirm with the City. Ontario’s Consumer Protection Act gives you a cooling-off period on contracts signed in your home.

On a roof this size the contract matters: it should name the shingle product and wind rating, the nailing pattern, the underlayment, the ice-and-water membrane in every valley and along the eaves, the metal for the valleys, the flashing work at every dormer, chimney and skylight, the number of layers removed, deck inspection, disposal, the nail sweep, and a payment schedule tied to milestones.

Replacing well the second time

A replacement is the chance to do what the builder did cheaply: open metal valleys instead of closed-cut, ice-and-water membrane well up the slope and in every valley, new flashing rather than reused, laminated shingles with a higher wind rating and the enhanced nailing pattern, and proper ridge and soffit ventilation sized for the attic. Ask that every bathroom fan be confirmed venting outside.

Because the whole street is due, ask neighbours who they used and whether the company came back for warranty calls. Hold back the final payment until the site is clean and you have the warranty documents.