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Toronto & GTA's Skylight Specialists

Let the Light In.Skylights Done Right.

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.

★★★★★
5.0 rated on Google
13 verified reviews · Cetra Exterior
VELUX Skylight Specialist
Fixed Skylights Vented Skylights Deck-Mount Skylights Curb-Mount Skylights Tubular Skylights Skylight Replacement Leak Repair All Roof Types Fixed Skylights Vented Skylights Deck-Mount Skylights Curb-Mount Skylights Tubular Skylights Skylight Replacement Leak Repair All Roof Types

Certified Partnership

Official VELUX Skylight Specialist

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.

VELUX Skylight Specialist
VELUX The No-Leak Skylight
10 yr
Installation Warranty (No-Leak Promise)
20 yr
Warranty on VELUX Glass
10 yr
Warranty on VELUX Product
5 yr
Warranty on Shades & Controls
View Our VELUX Specialist Profile →

More Than Just a Hole in the Roof

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.

500+
Skylights Installed
15+
Years Experience
5.0★
Google Rating
GTA
Wide Coverage
Deck-mount skylights installed by Cetra Exterior

What We Install

Skylight Types We Offer

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 Skylight
Most Popular

Fixed Skylights

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.

Vented Skylight
Best for Kitchens & Baths

Vented Skylights

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 Skylight
For Low-Slope Roofs

Deck-Mount Skylights

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

Installed to Last. Guaranteed.

Leak-Free Guarantee

Every Cetra skylight installation includes full flashing, waterproofing membrane, and a workmanship guarantee. If it leaks, we fix it — no questions asked.

Certified Installers

Our installers are trained and certified by leading skylight manufacturers, qualifying your installation for the best available product warranties.

Ontario Climate Ready

Every installation is engineered for Ontario's freeze-thaw cycles, ice damming, heavy snow loads, and extreme temperature swings.

Full-Service Install

We handle everything — from permits and structural assessment to interior finishing and drywall repair. One call, one team, one seamless job.

How It Works

Simple from Start to Finish

1

Free Consultation

We visit your home, assess your roof and interior, and recommend the best skylight type, size, and placement for your space.

2

Detailed Quote

You receive a clear, itemized quote within 48 hours — materials, labour, and any interior work included. No surprises.

3

Professional Install

Our crew installs your skylight with full flashing, waterproofing, and finishing — typically completed in a single day.

4

Final Inspection

We walk through the completed install together, inside and out, ensuring you're 100% satisfied before we leave.

Client Reviews

What Homeowners Are Saying

★★★★★
"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!"
Carol R.
Google Review · Markham, ON
★★★★★
"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."
Verified Homeowner
Google Review · GTA
★★★★★
"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!"
John S.
Google Review · GTA
★★★★★
"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."
Sophie L.
Google Review · GTA

Common Questions

Skylight FAQs

How long does a skylight installation take? +
Most residential skylight installations are completed in a single day. If interior finishing (drywall, painting) is included, it may take an additional day depending on the scope.
Will a skylight cause leaks? +
When professionally installed with proper flashing and waterproofing, skylights do not leak. Most skylight leaks are caused by improper installation. Cetra's installations come with a workmanship guarantee.
What skylight brands do you install? +
We install skylights from leading manufacturers including VELUX, Fakro, and other premium brands. We'll recommend the best option based on your roof type, budget, and performance needs.
Can you replace an existing skylight? +
Absolutely. Skylight replacement is one of our most common jobs. We remove the old unit, inspect and repair any underlying damage, and install a new modern skylight with fresh flashing and sealing.
Do skylights work on metal roofs? +
Yes — and we specialize in exactly this. Installing skylights on metal roofs requires specific flashing techniques and experience. Our team is trained in metal roof skylight integration for a perfect, leak-free fit.
How much does a skylight installation cost? +
Costs vary depending on the skylight type, size, roof pitch, and whether interior finishing is needed. We provide free, detailed on-site quotes so you know exactly what to expect before any work begins.

Get Your Free Skylight Quote

Fill out the form and a Cetra skylight specialist will contact you within 24 hours to schedule a free on-site assessment.

No-obligation, completely free estimate
On-site assessment by a certified specialist
Detailed quote within 48 hours
All skylight types and brands available
Serving all of Greater Toronto Area
Transparent, written quotes
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