Janesville Premium Roofing provides professional commercial roofing in Janesville, WI for residential and commercial properties across south central Wisconsin. The Uniform Dwelling Code stops at two families. Add a third unit and the building leaves chapters SPS 320 through 325 altogether and falls under the Wisconsin Commercial Building Code, chapters SPS 361 through 366, which is built on the International Building Code.
In Janesville that line runs straight through the housing stock. Large older houses near downtown were routinely cut into two units and then into three, and the third unit moved the building into a different code without a single nail changing position. Owners are often genuinely surprised to hear that their triplex is a commercial building for code purposes. The assessor's card and the code do not always agree about what a building is.
It changes the roof conversation completely. The commercial code brings plan review, different fire classification requirements and a different set of standards for the assembly, and it carries none of the June 1980 exemption that the dwelling code does. An 1890s building running as a triplex gets treated very differently from the identical building next door running as a duplex. Same brick, same year, two entirely different rulebooks, purely because of the unit count.
We work both sides of that line. Low-slope EPDM and TPO on the older commercial buildings along the river and out in the industrial corridor, standing-seam and structural metal on shops and agricultural buildings across the county, and asphalt on the smaller multifamily that still carries a pitched roof over it. Roof types here are decided by deck, slope and occupancy rather than by what we happen to keep in the yard.
Commercial work runs on documents rather than handshakes. We put the system, the thickness, the attachment pattern, the insulation R-value and the warranty term into the proposal, and we schedule around your operating hours, because a torn-open roof over an occupied tenant space is a liability rather than a milestone worth celebrating. A roof that goes on quietly around a working business is worth paying a little more for, and we schedule it that way.
The first thing we do on any multi-unit building is tell you which code you are actually under. That answer changes the scope, the permit path and sometimes the price by a wide margin, and it is a bad thing to discover halfway through a tear-off. You get it from us before the estimate, not after. It costs us nothing to answer that question early and it saves everyone a great deal later.
Our licensed and insured team brings the right materials and equipment to every job — No. 15 asphalt-impregnated felt underlayment, ASTM D4869 Type I underlayment felt, ring-shank nails set into 1x6 board sheathing, No. 28 gauge open-valley sheet metal, 50-pound roll roofing in closed valleys, step flashing and masonry chimney crickets — and backs the work with a written workmanship warranty. We serve Janesville and nearby communities including Beloit, Edgerton, Milton, Evansville.
What We Handle
Everything our commercial roofing in Janesville covers
One crew, one point of contact, and the full range of commercial roofing work in Janesville, WI. If it is on this list we do it in house rather than handing it to a subcontractor:
- commercial roofing Janesville
- triplex roof code
- multifamily roofing
- commercial EPDM roof
- TPO commercial roofing
- industrial metal roof
- apartment building roof replacement
- commercial roof maintenance
- SPS 361 commercial code
- tenant occupied roof work
Not sure which one describes your situation? Describe it in plain words and we will sort it out — or browse the rest of our Janesville services.
Materials, equipment and how we do commercial roofing
The difference between commercial roofing that lasts and commercial roofing that gets redone in three years is almost always preparation and materials, not the finish you see on day one. We work with No. 15 asphalt-impregnated felt underlayment, ASTM D4869 Type I underlayment felt, ring-shank nails set into 1x6 board sheathing, No. 28 gauge open-valley sheet metal, spec them to the job instead of to the invoice, and write the material grades into the free estimate so you know exactly what you are buying.
Every Janesville job runs the same way: site walk and measurements, written scope and fixed price, protection of the surrounding area, then the work itself with a daily clean-up. Years of roofing work in south central Wisconsin means we have already met whatever your property is going to throw at us — awkward access, older construction, an HOA with opinions.
Where we do commercial roofing outside Janesville
Janesville Premium Roofing covers Janesville and the surrounding communities of south central Wisconsin. Crews run out to the same nearby cities every week, so an out-of-town job does not mean an out-of-town price.
- Commercial Roofing in Beloit, WI — Rock County, population 36,657
- Commercial Roofing in Edgerton, WI — Rock County, population 5,945
- Commercial Roofing in Milton, WI — Rock County, population 5,716
- Commercial Roofing in Evansville, WI — Rock County, population 5,703
- Commercial Roofing in Clinton, WI — Rock County, population 2,221
- Commercial Roofing in Orfordville, WI — Rock County, population 1,473
Start on the Janesville Premium Roofing homepage for a free estimate, or call (844) 511-2320 and describe the job.
Why Janesville Chooses Janesville Premium Roofing
- ✓We pull the assessor's construction year before we price a roof, because June 1, 1980 decides whether the state code governs your reroof or your contract has to.
- ✓Our estimates name specifications rather than adjectives: No. 15 felt or a labeled ASTM D226 Type I synthetic, four fasteners per strip shingle, a two-inch head lap.
- ✓We count existing layers by lifting shingles at the rake and a valley, and the count goes in writing before anything is sent to your insurance carrier.
- ✓We go in the attic on every inspection. Fastener rust, valley staining and packed eaves show on the underside of the sheathing long before they show on top.
The standards behind commercial roofing
Quality here is not a matter of opinion — it is written down. The commercial roofing work we do in Janesville follows published industry standards: NRCA publishes the Roofing Manual, the industry's reference for details and slope minimums, and Asphalt Roofing Manufacturers Association sets the shingle application and ventilation guidance the warranties reference. If a contractor cannot tell you which standard a detail comes from, that is worth asking about before you sign.
Every commercial roofing project in Janesville gets the same attention, whether it is a single room or a full commercial job. We show up on schedule, keep the site clean, and stand behind the work — the estimate is free and there is no pressure.
Ready to get started? Call (844) 511-2320 for a free commercial roofing free estimate in Janesville, or request a quote and we'll get right back to you.