Janesville homes built before 1970 in Downtown Janesville and the West Side often carry original decking that has seen decades of freeze-thaw cycles. When installing new roofing we first check for soft spots caused by past ice dams near the eaves, then add extra ice-and-water shield along the lower four feet and around all penetrations. This step prevents the leaks that commonly appear after the first heavy spring melt.
Metal panels or architectural shingles must handle both the weight of winter snow loads and the expansion that occurs during humid July afternoons. We use self-adhered underlayment across the entire deck on homes near Riverside Park and the Rock County Courthouse where wind-driven rain off the Rock River is common. Ridge vent installation is sized to match the existing attic volume so moisture does not build up under the new surface during warm months.
Courtney and East Side neighborhoods sit on slightly higher ground with fewer drainage issues, yet many roofs there still suffer from poor flashing at dormers and chimneys. We replace step flashing with new copper or painted steel and extend it four inches under the shingles and four inches up the wall. This detail keeps water out when snow slides off the steeper pitches typical of those streets.
Installation crews working near Rotary Botanical Gardens or the Janesville Performing Arts Center schedule tear-offs for early morning so debris removal finishes before afternoon traffic increases on nearby routes to Beloit and Madison.
Technician insight
In Janesville the thing that catches most people out with Roofing Installation is skipping extra ice-and-water shield on the West Side and Courtney homes where eaves face the prevailing winter wind; those roofs always show leaks first when the river humidity meets a sudden freeze.
West Side Bungalow Re-Roof
Homeowner called after repeated leaks near the front porch. We found rotted decking from years of ice dam backup. Removed three layers, replaced damaged boards, added full ice shield, then installed architectural shingles with new ridge vent. No further leaks after the next winter melt.
Roofing Installation Services We Offer
✓Asphalt Shingle Installation
Architectural shingles installed over new synthetic underlayment with ice shield at eaves for homes facing Janesville winters.
✓Metal Roofing Installation
Standing-seam or screw-down metal panels chosen for durability against snow load and wind in Rock County.
✓Cedar Shake Installation
Pressure-treated cedar shakes applied with proper ventilation and spacing for older homes in Downtown Janesville.
✓Slate Tile Installation
Natural slate installed on steeper pitches common near the Rock County Courthouse with reinforced underlayment.
✓Flat Roof Membrane Installation
TPO or EPDM membrane systems for low-slope sections on commercial buildings in the East Side industrial areas.
Roofing Installation Cost in Janesville, WI
| Service | Typical Range | What Affects It |
|---|---|---|
| Asphalt shingle roof replacement | $6,500–$14,000 | Depends on house size, number of layers removed, and access in older neighborhoods. |
| Metal panel installation | $9,000–$18,000 | Higher for steep pitches near Riverside Park or custom colors. |
| Cedar shake installation | $11,000–$19,000 | Includes ventilation upgrades common on pre-1960 homes. |
| Ice and water shield add-on | $800–$1,800 | Full deck coverage on homes with history of ice dams. |
Ranges are typical for Janesville, WI and confirmed with an exact written quote before any work starts.
How it works
- 1
Site Assessment
We inspect decking, flashing and ventilation on site in the specific neighborhood to note any issues from past ice dams or wind exposure.
- 2
Material Selection
Owner reviews options suited to Janesville's humid continental climate and the home's age and pitch.
- 3
Deck Preparation
Old roofing is removed, damaged boards replaced, and ice-and-water shield applied at eaves and valleys.
- 4
Installation And Cleanup
New roofing is installed with manufacturer-specified fasteners and vents, followed by magnet sweep and gutter clearing.
Pricing
Upfront written quotes after on-site inspection; price varies by square footage, pitch, and chosen material.