Toronto & GTA's Skylight Specialists
Cetra Exterior installs and replaces all types of skylights across the GTA — professionally flashed, fully waterproofed, and built to last through Ontario's harshest seasons.
Certified Partnership
Cetra Exterior is a certified member of the VELUX Skylight Specialist Network — an exclusive program for companies fully dedicated to skylight installation day in and day out.
Skylight Experts
A properly installed skylight transforms how a space feels — flooding rooms with natural daylight while improving air quality and reducing energy costs. Cetra Exterior specializes exclusively in high-performance skylight installations, ensuring every unit is perfectly flashed, sealed, and integrated with your roof for a lifetime of leak-free performance.
What We Install
From fixed glass units to vented, deck-mount, and tubular systems — we install every type of skylight and find the right fit for your home, roof, and budget.
Fixed skylights are non-opening units that flood interior spaces with consistent natural light year-round. They're ideal for hallways, stairwells, living rooms, and any space where ventilation isn't the primary goal. Low-maintenance and extremely weather-tight.
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Vented skylights open to allow fresh air circulation — perfect for kitchens, bathrooms, and spaces that need moisture control. Available in manual and electric (remote-operated) versions, with optional rain sensors that close automatically when weather changes.
Deck-mount skylights sit flush against the roof deck, making them ideal for low-slope and flat rooflines. They offer a sleek, modern appearance and are installed with a self-flashing frame that integrates directly into the roofing system for a watertight seal.
Why Choose Cetra
Every Cetra skylight installation includes full flashing, waterproofing membrane, and a workmanship guarantee. If it leaks, we fix it — no questions asked.
Our installers are trained and certified by leading skylight manufacturers, qualifying your installation for the best available product warranties.
Every installation is engineered for Ontario's freeze-thaw cycles, ice damming, heavy snow loads, and extreme temperature swings.
We handle everything — from permits and structural assessment to interior finishing and drywall repair. One call, one team, one seamless job.
How It Works
We visit your home, assess your roof and interior, and recommend the best skylight type, size, and placement for your space.
You receive a clear, itemized quote within 48 hours — materials, labour, and any interior work included. No surprises.
Our crew installs your skylight with full flashing, waterproofing, and finishing — typically completed in a single day.
We walk through the completed install together, inside and out, ensuring you're 100% satisfied before we leave.
Client Reviews
"We wanted to install 3 new skylights and we found Cetra Exterior. Steven arranged a time to come by the next day and had a quote ready with a handful of options. Steven and his team were very professional and updated me as the job progressed. We are very happy with the result. Thank you Steven and team!"
"Working with AJ (Mr. Jeong) and the Cetra team to replace my old skylight was an absolute pleasure, and I'm beyond thrilled with the results. The installation was clean, the team was professional, and there hasn't been a single leak since. I can't recommend them enough."
"Steven was great — easy to talk to and very knowledgeable. We replaced our roof and installed a new skylight. They did a great job, love the new skylight!! Highly recommended!"
"We recently had the pleasure of working with AJ from Cetra Exterior and I couldn't be more satisfied. From start to finish, their professionalism and expertise were evident. They provided a clear and detailed estimate and delivered exactly what they promised."
Common Questions
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