Commercial
VELUX Modular Skylights, curb to finished ceiling
VMS longlights, ridgelights, and circular domes for offices, hotels, warehouses, and retail — installed by one certified crew that handles the complete scope.
VMS longlights, ridgelights, and circular domes for offices, hotels, warehouses, and retail — installed by one certified crew that handles the complete scope.
Most commercial skylight problems happen at the handoffs — roofer blames glazier, glazier blames drywaller. We eliminate the handoffs: one crew handles the complete scope.
VELUX Modular Skylights — prefabricated, factory-glazed modules for longlights, ridgelights, and wall-mounted configurations. We install to VELUX Commercial specification: structural mounting, weathersealing, and commissioning.
The part most installers won't touch: drywall shafts, taping, insulation, and paint-ready finishing around the skylight opening — so the ceiling looks like it was always meant to have light.
Custom circular curb construction and dome skylight installation — including replacement of aging acrylic domes on flat commercial roofs.
Structural curbs built and waterproofed for flat and low-slope commercial roofs — membrane tie-ins, flashing, and thermal breaks done to spec.
VMS installations for GTA hotel and multi-unit projects, including full interior finishing packages. References and project documentation available on request.
See commercial projects →Before you budget for replacement, it is worth knowing which of these you actually have. We have been called to plenty of "leaking" commercial skylights that had no water ingress whatsoever.
Water appearing at the inside edge of a skylight on a cold morning, drying up by afternoon, and reappearing on the next cold night is almost always condensation — warm humid interior air meeting a cold frame or an uninsulated curb. Real leaks track weather, not temperature: they show up during or shortly after rain and they do not care how cold it is.
The fix for condensation is not a new skylight. It is usually a break in the vapour barrier where it terminates against the upstand, an uninsulated curb creating a thermal bridge, or an interior humidity problem the building has developed since the roof went on. Replacing the glazing changes nothing and the complaint comes straight back.
In our experience the water is getting in at one of four places, in roughly this order of frequency:
Acrylic yellows and crazes with UV exposure. A dome that has gone milky is losing light transmission year over year and becoming brittle — which matters, because a brittle dome is a fall hazard for anyone servicing rooftop equipment. If your domes are original to a building from the 1980s or 1990s, they are well past their useful life regardless of whether they are leaking yet.
| What you're seeing | Likely scope | Why |
|---|---|---|
| Moisture on cold mornings, dry after rain | Vapour & insulation remediation | Condensation. New glazing will not change it. |
| Water during rain, curb otherwise sound | Re-flash and re-terminate | Membrane termination, not the unit. |
| Dome yellowed or crazed, no leak yet | Dome replacement on existing curb | Light loss and a growing fall hazard. |
| Dome cracked, curb soft or rotten | Curb rebuild + new unit | A new unit on a failing curb fails with it. |
| Repeated leaks across several units | Full assessment before spending | Usually a roof or drainage issue, not five coincidences. |
| Want more daylight than you have | VMS Longlight or Ridgelight | Modular runs, not more individual domes. |
Commercial skylight work is not priceable from a phone description, and any contractor who gives you a firm figure without these is guessing. Send what you have — we work with partial information all the time.
Hotels, offices and retail cannot close for a skylight. The scope below is standard on our occupied-building work and is written into the quote rather than negotiated on site:
One crew carries roofing, skylight and interior finishing. There is no point in the schedule where a trade is waiting on another trade to release the area.
Yes — as a specialty sub for the skylight scope. We read shop drawings, coordinate with the roofing and structural trades, and deliver the closeout documentation your project needs. Specifiers can pull our Revit families, 2D AutoCAD details and CSI specification text from the VMS specification page.
Almost certainly not. Water that appears on cold mornings and disappears by afternoon, regardless of rain, is condensation — warm interior air meeting a cold frame or an uninsulated curb. Replacing the unit will not fix it. The cause is usually a break in the vapour barrier where it terminates at the upstand, a thermal bridge at the curb, or raised interior humidity. Real leaks track rainfall, not temperature.
Yes. Aging acrylic domes that have yellowed or cracked are one of our most common commercial calls. We assess the existing curb first — a new unit on a failing curb fails with it — then replace or rebuild the curb as needed and install new glazing.
Most membrane manufacturers want the upstand well clear of the finished roof surface, commonly around 200 mm. Low curbs get overtopped by ponding water and by drifted snow that melts in place, which is a frequent cause of leaks that get blamed on the skylight itself.
It can, depending on the membrane manufacturer and who holds the warranty. We ask for the membrane type and age before quoting for exactly this reason, and we detail the tie-in to the manufacturer's requirement. Tell us if the roof is under an active manufacturer warranty and we will work to keep it intact.
From a single replacement dome to multi-module VMS ridgelights. If it's skylights on a commercial roof in the GTA, we'll quote it.
Yes, and most of our commercial work is. Interior containment goes up before anything is cut, no opening is left unclosed overnight, and access windows are agreed in advance — including off-hours where the space requires it.
Either, but it must be named explicitly in the specification. Sub-construction is not supplied with the skylight package; it is built on site and it is where most VMS projects go wrong. Left ambiguous between trades it becomes a change order. We carry it when it is in our scope, and we will verify someone else's before the modules are ordered.
Our free roof customizer gives homeowners an instant ballpark from satellite imagery — trace the roof, pick materials, add VELUX skylights, see the range. Useful for property managers scoping multiple units.
Customize Your Roof
Send drawings or book a site walk — we'll quote the full scope, install through finishing.