Skylight work covers new installations, replacing an aging or leaking unit, and resealing flashing around a skylight that's still structurally fine but weeping at the seams. On a typical Toronto house that means cutting or resizing a roof opening, framing a curb (or going curb-less on newer flat-glass models), setting the unit, and integrating step flashing and counter-flashing under the surrounding shingles or membrane so water can't track back in around the edges. It's detail work: a beautiful skylight badly flashed will leak within a year or two, especially through Toronto's freeze-thaw winters and spring downpours.
What to check before you hire
- Whether they install both curb-mounted and deck-mounted (low-profile) units, and which brands they stock or warranty parts for
- How they handle flashing on your specific roof type, whether asphalt shingle, metal, or flat/torch-on membrane
- Written workmanship warranty separate from the manufacturer's glass and seal warranty
- WSIB coverage and liability insurance, since this work involves cutting into your roof deck
- Whether they'll address interior drywall or trim patching after the install, or leave that to you
How we score contractors
Our ranking weighs verified licensing and insurance, review consistency over time (not just a handful of five-star spikes), responsiveness, and how contractors handle warranty or callback issues. Full detail is on the methodology page. For a ranked shortlist across all Toronto roofing categories, including skylight specialists, see the best roofing contractors in Toronto guide.