What does roof waterproofing cost in the GTA?

Small porch and garage roofs in the GTA are $1,100 to $2,300. Full flat-roof sections run $2,200 to $5,600.

How long does the system last?

Properly installed membrane systems carry a 10-year written warranty and typically last 15 to 20 years.

Can it be done in cold weather?

Torch-on systems can be installed into late fall. Liquid systems need milder temperatures.

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Typical roof waterproofing prices in the GTA
Job type	Typical price
Porch or garage roofTorch-on or liquid membrane	$1,100 – $2,300
Flat roof sectionFull system with flashings	$2,200 – $5,600
Balcony / deck systemWalkable traffic-grade finish	$1,800 – $4,400

Ranges reflect the GTA labour and material costs. Your calculator result is tailored to your answers.

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Licensed, insured, WETT & TSSA certified · 4.9★ from 743 GTA reviews

What the GTA homeowners say

A real person answers the phone
No call centre, no chasing. Booked in two minutes and got a text when the truck was on the way.

Ryan K. · 2026-02-28

Bundled two services, saved the trip fee
Had the chimney and the dryer vent done on the same visit. Cheaper and half the disruption.

Farah N. · 2025-12-27

Documentation on everything
Photos, readings, and a written summary after every visit. Makes it easy to keep records for the house file.

Doug T. · 2026-01-11

Reliable across three jobs
Used them for a sweep, a dryer vent, and a fireplace service. Same standard every time and the same technician twice, which I appreciated.

Helena B. · 2026-04-17

Roof Waterproofing pricing questions

What does roof waterproofing cost in the GTA?: Small porch and garage roofs in the GTA are $1,100 to $2,300. Full flat-roof sections run $2,200 to $5,600.
How long does the system last?: Properly installed membrane systems carry a 10-year written warranty and typically last 15 to 20 years.
Can it be done in cold weather?: Torch-on systems can be installed into late fall. Liquid systems need milder temperatures.

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Roof RepairLeak tracing, shingle and flashing repairs with photo proof of the fix.Roof ReplacementFull tear-off and re-roof with ice-and-water shield and new venting.Roof InspectionRoof-level and attic inspection with a dated photo report.

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Roof Waterproofing Cost in the GTA — Get Your Price Instantly

What the GTA homeowners say

Roof Waterproofing pricing questions

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Roof Waterproofing pricing across the GTA

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