Janesville homes built before 1970 on the West Side and around the Rock County Courthouse often carry two or three layers of asphalt shingles that must come off completely before a new roof goes down. Leaving old layers in place traps moisture against the decking during the freeze-thaw cycles common in Rock County winters and leads to premature failure. Crews here routinely check for soft spots caused by previous ice dams near eaves and add extra ice-and-water shield along the first six feet of roof.
Metal roofing has gained ground on East Side properties near Rotary Botanical Gardens because it sheds heavy snow loads without the ridge buildup that asphalt sees after a January storm. When replacing a roof on a two-story home in Downtown Janesville, access for staging becomes the first planning step; narrow alleys and mature trees limit crane use, so bundles are carried by hand or conveyor. Ventilation upgrades are almost always included because the original ridge vents on 1950s ranches were often undersized for today's insulation levels.
Homeowners in Courtney and near Riverside Park frequently request matching of architectural shingles to preserve the look of the original roof while improving wind resistance. Wind-driven rain from summer storms can push water under standard three-tab shingles on steeper pitches, so self-sealing shingles rated for 130 mph are standard here. Every replacement includes new drip edge, step flashing at chimneys, and boots around plumbing vents to keep water out during the warm, humid summers.
Technician insight
In Janesville the thing that catches most people out with roof replacement is the second or third layer of shingles on 1950s and 1960s homes in Courtney and the West Side. When winter ice dams push water under those layers, the decking rots before anyone sees it. We always insist on a full tear-off and extra shield along the eaves because skipping it guarantees callbacks after the first big January thaw.
West Side Ranch With Hidden Rot
The homeowner noticed ceiling stains after a heavy snow. We found three layers of shingles and rotted decking along the north eaves caused by repeated ice dams. We performed a complete tear-off, replaced damaged plywood, added extended ice-and-water shield, and installed architectural shingles with upgraded ridge ventilation. The roof now handles Rock County winters without leaks.
Roof Replacement Services We Offer
✓Full Roof Tear-Off and Replacement
Removes all existing layers down to the deck before installing new underlayment and shingles, preventing trapped moisture that causes rot during Janesville winters.
✓Architectural Shingle Roof Replacement
Upgrades older three-tab roofs on West Side and East Side homes to thicker laminated shingles that better handle snow load and wind-driven rain.
✓Metal Roof Replacement
Installs standing-seam or screw-down metal panels suited to Rock County snow loads and offers longer service life on properties near Riverside Park.
✓Ice Dam Prevention Upgrade
Adds extended ice-and-water shield and improved ridge ventilation during replacement to stop leaks common after heavy January snow in Janesville.
✓Chimney and Skylight Flashing Replacement
Replaces corroded step flashing and counter flashing around chimneys and skylights to stop water intrusion on older Rock County homes.
Roof Replacement Cost in Janesville, WI
| Service | Typical Range | What Affects It |
|---|---|---|
| Asphalt Shingle Roof Replacement | $6,500–$14,000 | Varies with square footage, number of layers, and steep pitch on two-story homes. |
| Metal Roof Replacement | $11,000–$22,000 | Higher for standing-seam systems and homes with multiple dormers near Rotary Botanical Gardens. |
| Ice Dam Shield Upgrade | $800–$1,800 | Added during replacement on older East Side and West Side houses. |
Ranges are typical for Janesville, WI and confirmed with an exact written quote before any work starts.
How it works
- 1
On-Site Inspection
We measure the roof, check decking condition, and note ventilation and flashing details on homes in Downtown Janesville or Courtney.
- 2
Material And Color Selection
Homeowners choose shingles or metal panels that match the neighborhood style while meeting local wind and snow requirements.
- 3
Complete Tear-Off
All old layers are removed, damaged decking is replaced, and ice-and-water shield is installed along eaves and valleys.
- 4
New Roof Installation
Underlayment, shingles or metal panels, ridge vent, and all flashing are installed with daily cleanup to keep the yard usable.
- 5
Final Walk-Through
We review every detail with the homeowner and leave a written maintenance guide for Rock County weather.
Pricing
Upfront written quotes after inspection; final price depends on layers, pitch, and access.