Home › Commercial Roofing Kamloops
Kamloops, BC
On a commercial building the roof is rarely the difficult part. The difficult part is that a business is operating underneath it, the only way up is through someone’s premises, and there is already a great deal of equipment in the way.
Residential roofing has one client, one building, and an empty house if it comes to it. Commercial roofing in Kamloops usually has a tenant serving customers directly below the section being opened, a second tenant next door who did not know about any of it, and a delivery expected at ten.
That is the constraint that shapes everything else, and it is the reason two contractors can look at the same square footage and produce very different numbers. The membrane is a commodity. The plan for working above an open building is not.
This page is about that plan. The behaviour of the roof itself — why low-slope assemblies fail here, what ponding does, how drainage and seams actually go wrong in a semi-arid climate — is covered separately on the flat roof page, and that is the page to read for the physics.
Before any material reaches a commercial roof, someone has to answer how. On a strip-mall or a downtown Kamloops building with no rear lane, the honest answers are limited and each one has a consequence.
None of this is exotic. All of it is the difference between a job that runs and a job that stops on day two.
The defining feature of a commercial roof is that it is also a mechanical yard. Package units, exhaust fans, make-up air, refrigeration lines, conduit, antennae, skylights, hatches, vents and the curbs they all sit on.
Each of those is two problems at once. It is an obstacle, because the membrane has to be worked around or under it and because it may need lifting. And it is a termination, because every one of them is a place where the roof is interrupted and then sealed back against itself.
Terminations are where commercial roofs leak. Not in the middle of a field of membrane. At the penetration, at the curb, at the change of plane, at the edge. A reroof that renews the field and reuses tired flashings at forty penetrations has renewed the part that was not failing.
So the useful question to put to any commercial bid in this city is simple and specific: how many penetrations are there, and what is happening at each of them? A contractor who has counted has been on the roof. A contractor quoting a rate per square with no penetration schedule has quoted an area, not a building.
Rooftop equipment usually cannot stay exactly where it is while the assembly beneath it is replaced. Raising a unit, disconnecting and setting it aside, or rebuilding a rotten curb under it, all involve mechanical and sometimes electrical work that the roofing crew is not doing. Each one is an interruption to whatever that unit serves — heat, cooling, exhaust over a kitchen line, refrigeration for a cooler full of stock.
In a Kamloops July, taking the air conditioning off a retail space for a day is not a footnote. In January the same is true of heat. The sequencing of equipment work against occupancy is a genuine part of the scope and it belongs in writing.
Replacing a commercial roof covering sits in the same logic as replacing a residential one: if the work does not alter the dead loads or the slope of the existing roof structure, it is not the kind of work the City’s bulletin puts on the permit side. Adding to the structure is different, and the bulletin is explicit about what that looks like.
City of Kamloops — Bulletin No. 23-01, “When Building Permits Are Required”
construct roofing with structural work (i.e. adding new dormers, skylights, solar panels)City of Kamloops Bulletin No. 23-01, April 2023, revised April 2025, issued under Building Bylaw No. 11-84 and the BC Building Code 2024. Listed among the work that does require a building permit.
Commercial projects reach that line more often than houses do, because commercial roofs accumulate. A new package unit, an added solar array, a new skylight over a renovated space, a screen wall for equipment — these are additions, and they are additions that put permanent weight on a structure that was designed for a specific load in a city whose snow design is not uniform across its neighbourhoods.
Who answers the structural question is covered on the roof replacement page, and the answer is the same here: not the roofer. Confirm the design values for your address with the City or a structural engineer.
The failure mode on an occupied commercial reroof is almost never technical. It is that someone underneath the work did not know it was coming.
A workable sequence looks like this, and it is worth agreeing before anything opens. The roof is divided into sections small enough that each one is opened and made watertight inside a single working period. The order of sections is chosen against what is below them — the most sensitive space gets the most stable weather window, not whichever section is nearest the hoist. Each tenant gets the dates that affect them specifically, rather than a schedule for the whole building. And there is a stated position on what happens if weather turns while a section is open.
That last one is worth insisting on. In a climate whose governing rainfall event is a short, intense burst rather than sustained drizzle, the risk is not a wet week. It is fifteen minutes arriving over an open deck. The contractor either has a stated plan for that or is relying on the forecast.
If the building has a history of leaks that nobody has ever written down, get a written inspection before going to tender. A condition report gives every bidder the same starting facts, and it gives an owner something to put in front of a budget conversation that is not a contractor’s sales document.
Tell us about the building, the roof and how it operates, and we’ll pass it to a local Kamloops roofing company.
Usually yes, and that expectation should be written into the scope rather than assumed. What makes it workable is sequencing: the roof is divided into sections, each section is opened and made watertight within the same working period, and the areas below the open section are managed while that happens. What makes it fail is an open tear-off over an occupied space with weather coming, which is a scheduling decision rather than a roofing one.
A residential quote is mostly about the roof. A commercial quote is about the roof plus the logistics of reaching it and working above an operating building. Crane or hoist placement, where materials are staged, how debris comes down, which hours the noisy work can happen, what has to be shut down or isolated, and how many rooftop penetrations have to be reflashed. Two bids can differ substantially on identical roof area because they have assumed different answers to those questions.
The building owner or the property manager, not the roofing contractor. The roofer supplies the schedule and the constraints — which days, which sections, what noise, what access is lost, what has to be moved. Turning that into notice for the people underneath is a landlord function. It is worth agreeing who does it before the first section is opened, because the person who finds out late is usually the tenant whose ceiling it is.
Adding equipment is a different question from replacing a roof. The City’s bulletin lists constructing roofing with structural work, giving new dormers, skylights and solar panels as its examples, among the work that does require a permit. New units, new curbs or a solar array are additions to the structure rather than maintenance of it, so treat them as a permit conversation with the City’s Building Inspection Section rather than something folded quietly into a reroof.
They have to be dealt with rather than worked around. Depending on the unit and the assembly, that can mean raising it, temporarily disconnecting and setting it aside, or rebuilding the curb underneath it. Each of those involves a trade that is not the roofer, and each is a moment when the service the unit provides is interrupted. A quote that does not say how the units are being handled has not priced the job.
Some of it, and it costs more in ways that are not only the labour rate. Tear-off and anything that opens the assembly is weather-dependent and daylight-dependent, so it resists being pushed into evenings. Quieter work over a sensitive space — a clinic, a restaurant service period, a room that cannot take the noise — is more realistically sequenced than rescheduled. The productive question is which specific hours are genuinely unusable, rather than asking for the whole job at night.