Commercial Roofing
Low-slope and membrane systems for commercial buildings.
What commercial roofing involves
TPO, EPDM, PVC, modified bitumen and built-up, specified for the building and the traffic it takes.
A commercial roof is a different trade from a steep-slope house roof. We do both, separately.
What matters on commercial roofing
Drainage before material
The first question on any low-slope roof is where the water goes. Ponding is what kills membranes, and a roof that holds water for days after a storm will fail early regardless of which sheet is on it. We look at the slope, the drains and the terminations before we talk about material.
Seams and terminations
Field failures on commercial roofs are rare. Failures at seams, curbs, drains and the parapet edge are common. A hot-air welded seam that has been probed is a continuous sheet. Anything taped or glued and unverified is a scheduled leak.
Commercial Roofing on real jobs
How the system goes together
Fasteners rust from the inside out
Screws and nails on a roof within reach of the lake air corrode faster than the same hardware would inland. A plain steel nail head disappears under a shingle and takes years off the roof’s hold without a single visible symptom. Hot-dipped galvanized or stainless where the metal is exposed is a small line item that decides whether the roof reaches its rated life.
Mixed metals make it worse
Aluminum flashing pinned with the wrong screw sets up a reaction that eats the softer metal at every contact point.
We look at the old nails
What came out of the last roof tells you what to put in the new one.
How long a bead of sealant lasts
Roof sealant is a consumable. In this climate, with the ultraviolet load and the temperature swing, a good product stays flexible for a handful of years and then shrinks, crazes and pulls away from one side of the joint. That is normal and expected behavior for the material.
Design so sealant is a backup
Every joint that matters should shed water by its shape, with the sealant there as a second line. Where sealant is the only thing standing between water and the deck, somebody has signed you up for a maintenance visit every few years.
Ask what is holding a repair together
If the answer is caulk, ask again.
What we check
- Field condition and granule loss
- Valleys, ridges and every transition
- Penetrations and their flashing
- Gutter and fascia condition
How we approach it
Look first
We get on the roof and read what is actually happening before quoting anything.
Say what we find
Photographs and a plain explanation, including when the answer is that you do not need us yet.
Built in sequence
Crews we hire and run, working the right detail in the right order.
Leave it clean
Magnet over the yard, container gone, walked with you.
Cold nights pull condensation into the attic
A lot of what people call a roof leak up here is not a leak. Warm moist air from the house rises into an attic, hits a deck that is well below freezing, and condenses on the underside of the sheathing. In the morning it drips. Homeowners see a wet spot and think shingles, when the problem is that the attic is not moving air.
Frost on nail points
We look for rust rings and frost on the nail shanks. That pattern tells you it is condensation before a single shingle comes off.
The wet spring snow problem
Late season storms carry more water per inch than anything that falls midwinter. That heavy stuff clings to a roof instead of sliding, pushes on gutters, and refreezes at night into a solid mass on the overhang. It is also the load most likely to find a framing weakness.
After a heavy spring storm
Walk the drip line and look for bent gutter hangers and separated seams. Then look at the ceilings inside along exterior walls.
What we check on the deck
Spongy sheathing between rafters, especially over the eave where the ice sat.
What this looks like on a real roof
There is a version of commercial roofing that gets sold off a clipboard in the driveway and a version that comes off actually reading the roof. The second one costs the same and lasts.
What follows is the part most people never get told: what usually went wrong before we arrived, and what the job looks like when it is done in the right order.
Where roofs go wrong
The shortcut we see most
A membrane laid over wet insulation because tearing off would have cost a day. The roof looks finished, the moisture stays underneath, and the sheet fails early from below.
What good looks like instead
Moisture surveyed, wet sections cut out and replaced, drainage corrected, then the membrane installed and its seams probed.
Signs worth a look
- Ponding water still standing two days after rain
- Seams that have lifted or opened at an edge
- Blisters or ridging across the field
- Interior staining near drains, curbs or the parapet
What to expect
Scheduling around your operation
Most commercial work can be staged so the disruptive part happens when the building is quiet. Tear-off noise, crane or hoist time and material deliveries all get planned against your hours rather than ours.
What the roof survey covers
Before specifying anything we survey the existing assembly: slope and drainage, moisture in the insulation, the condition of seams and terminations, and how the roof is being used. A roof somebody walks on weekly needs a different answer from one nobody touches.
Documentation
Commercial and public work runs on records. We photograph the existing condition, the work in progress and the finished assembly, so there is a file rather than a recollection.
Related work
Commercial covers more than one job, and they are not interchangeable. These are the others in the same family, each on its own page.
Questions we get asked
Not the question you had? Call the shop and ask a person. We would rather talk it through than have you guess from a website.
(801) 382-8898Which membrane is right for my building?
It depends on the traffic, the exposure and what comes out of the exhaust. TPO and PVC are welded and light, EPDM is proven and has fewer seams in wide sheets, mod-bit and built-up are heavier assemblies. We specify for the building rather than for what is on the truck.
Can you work around our business hours?
Usually. Most commercial work can be staged so the noisy part happens when the building is quiet, and we talk about that before the schedule is set.
How long does a commercial membrane last?
It depends far more on drainage and detailing than on the sheet itself. A membrane with standing water on it and a membrane that drains properly will not last the same length of time.
Do you handle the insurance side?
On hail-damaged roofs, we work with your insurance to get the roof covered. We document the damage thoroughly with photographs, so the claim reflects what is actually on the roof.
Do you work through the winter?
Yes, with judgment. Shingles need to seal, and in genuine cold that takes longer or needs hand sealing. Emergency work happens whenever it has to. Full replacements get scheduled around the weather rather than forced into it.
How do I know when a roof is getting close?
Granules collecting in the gutters, tabs lifting or curling at the edges, shingles that look bare in patches, and daylight or staining in the attic. Any of those is worth a look.
Ask about commercial roofing
Call (801) 382-8898 or send a note. We will look at the roof and tell you straight what it needs.