Skylight Contractor in Ontario
Skylight work covers new installations cut into an existing roof deck, replacement of an old or fogged unit with a modern one, and repairs to flashing and seals around skylights that leak or sweat condensation. It sits at the crossover between roofing and carpentry: whoever does the job needs to cut and frame an opening correctly, tie the flashing into the surrounding shingles or membrane so water sheds properly, and set a unit that's rated for Mississauga's snow loads and temperature swings. We've reviewed 13 skylight contractors serving the Mississauga area, and the work they do ranges from single-unit replacements on a sloped asphalt roof to multi-skylight jobs on flat commercial or low-slope residential roofs.
What to look for in a skylight contractor
A few things separate a contractor worth calling from one to avoid. Ask whether they carry manufacturer certification for the skylight brands they install (Velux and Fakro are the two you'll see most often locally), since a certified installer usually gets a longer warranty on both the unit and the install. Ask how they handle flashing on your specific roof type: step flashing and a proper cricket above the skylight matter a lot more on a sloped shingle roof in a snowy climate than on a flat membrane roof. Get a written scope that separates the cost of the skylight unit from labour, and confirm they carry liability insurance and WSIB coverage, since this work involves cutting into your roof deck and any mistake there gets expensive fast.
How our scoring works
Every contractor in this category is scored on the same criteria: verified licensing and insurance, review volume and rating trends, responsiveness, and how consistently they show up for warranty or follow-up work. For a full side-by-side comparison and our top picks, see the ranked guide to Mississauga roofing contractors. Details on how we calculate scores and what data feeds into them are on our methodology page.
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All skylight contractor, ranked by score and relevance
We found 200 businesses offering skylight contractor; 18 met the criteria for the scored directory. The order weighs each business's overall score by how much of its reviewed work is skylight contractor, so a lower-scored specialist can rank above a higher-scored generalist. Filter and sort below, or open the full map view.
When you submit a quote or contact form through this site, your enquiry may be shared with partner providers who can do the work. We may earn a referral fee from these partners, but our rankings and scores are determined solely by our published method and are never affected by referral fees.
Common questions about skylight contractor
- How much does a skylight installation cost in Mississauga?
- For a single residential skylight, expect the unit itself to run from a few hundred dollars for a basic fixed skylight up to well over a thousand for a larger vented or solar-powered model, with installation labour typically adding a comparable amount on top given the roof-cutting and flashing work involved. Costs climb if the contractor has to reframe rafters, add a light shaft, or replace surrounding shingles as part of the job. Get itemized quotes from at least two contractors so you can see unit cost and labour separately.
- How often do skylights need to be replaced or resealed?
- A well-installed skylight with quality flashing can last 15 to 20 years or more, but the seals and flashing around it are usually the first thing to fail, sometimes within 10 years, especially if the original install was rushed or the roof around it has been re-shingled without redoing the flashing. If you notice condensation between the panes, staining on the ceiling below, or drafts, it's worth having a contractor inspect the flashing before assuming the whole unit needs replacing.
- What should I expect during a skylight installation?
- A typical job starts with the contractor confirming the opening size and roof pitch, then cutting the deck (for a new install) or removing the old unit, setting the new skylight, and building up step flashing and often a cricket to divert water and snow around the top edge. Interior finishing, like drywalling a light shaft, is usually a separate step and sometimes a separate trade. Most single-skylight jobs on an accessible roof can be done in a day, though flat-roof or multi-unit jobs take longer.
- How can I tell if a skylight was installed well?
- Check for even, straight flashing with no visible caulk patches trying to cover a gap, since a caulk-heavy job usually means the flashing wasn't done right underneath. Ask to see photos of the flashing before the shingles went back over it, since that's the layer that actually stops leaks. After a few rainfalls, check the ceiling and frame inside for any staining or moisture, and confirm in writing what the workmanship warranty covers versus the manufacturer's warranty on the unit itself.