Janesville Premium Roofing provides professional roof replacement in Janesville, WI for residential and commercial properties across south central Wisconsin. A full reroof in Janesville starts with a question that has nothing to do with shingles: what year was the house built? The answer decides which rulebook governs the work, and it moves the scope more than any brand choice ever will.
Wisconsin's Uniform Dwelling Code, chapters SPS 320 through 325 of the state administrative code, took effect June 1, 1980. The Department of Safety and Professional Services administers it and it is enforced in every municipality in the state. That is unusual. Most states leave one- and two-family construction to whatever the local building department happened to adopt, so the rules change at the city limits. Wisconsin picked one standard and applied it to the whole state.
Above that date your reroof is governed work. Below it, SPS 320.05 says the code does not apply to dwellings whose construction began before the effective date, or to alterations to them. A 1958 ranch on the west side is not exempt from weather. It is exempt from the state code. No inspector is going to look at the underlayment, and nobody will ever ask. Most owners have never once heard about it.
So we quote it differently. On a post-1980 house we build to SPS 321.28 because we have to: No. 15 felt or an ASTM D226 equivalent under the shingles, four fasteners per strip shingle, a two-inch head lap, flashing at every valley and opening. On a pre-1980 house we write those same lines into the contract and say in the estimate that they are our standard rather than the state's.
That distinction matters when something goes wrong. If a post-1980 reroof comes up short on fasteners you have a code violation. If a pre-code reroof comes up short you have a contract dispute, and only if the contract said anything at all. Most quotes around here say almost nothing. Ours lists the underlayment weight, the nail type and the valley method by name. That is the whole difference between a document and a promise.
Where the year genuinely changes the price is the deck. Pre-1980 Janesville houses are usually sheathed in 1x6 or 1x8 boards with gaps rather than plywood, and board decking takes a longer ring-shank nail and closer attention. Post-1980 houses came with panel sheathing and usually cost less to reroof. We tell you which one you have before you sign anything.
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 roof replacement in Janesville covers
One crew, one point of contact, and the full range of roof replacement work in Janesville, WI. If it is on this list we do it in house rather than handing it to a subcontractor:
- roof replacement Janesville
- full reroof
- tear-off roofing
- new roof cost
- architectural shingle reroof
- board sheathing repair
- roof deck replacement
- two-layer tear-off
- reroof estimate
- drip edge and starter course
- residential reroofing Rock County
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 roof replacement
The difference between roof replacement that lasts and roof replacement 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 roof replacement 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.
- Roof Replacement in Beloit, WI — Rock County, population 36,657
- Roof Replacement in Edgerton, WI — Rock County, population 5,945
- Roof Replacement in Milton, WI — Rock County, population 5,716
- Roof Replacement in Evansville, WI — Rock County, population 5,703
- Roof Replacement in Clinton, WI — Rock County, population 2,221
- Roof Replacement 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 roof replacement
Quality here is not a matter of opinion — it is written down. The roof replacement 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 roof replacement 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 roof replacement free estimate in Janesville, or request a quote and we'll get right back to you.