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Top Window Repair in Janesville, Wisconsin Ranked
A well-functioning window is essential for comfort, energy efficiency, and safety in your Janesville home. When windows fail, they can lead to frustrating drafts, foggy panes, and higher utility bills. Window repair is the targeted process of fixing these specific issues-from replacing broken glass and failed seals to repairing worn hardware-often at a fraction of the cost of a full window replacement. This guide will help you understand common window problems in our local climate, typical solutions and timelines, and how to connect with qualified professionals in the Janesville area to restore your windows to proper working order.

Ganser Company, Inc.
4788 McFarland Ct, McFarland, WI 53558
Ganser Company, Inc. is a family-owned business serving Madison, WI, and the Greater Dane County area since 1939. They specialize in window repair and replacement, along with roofing, siding, doors, gutters, and exterior remodeling. With over 80 years of experience, Ganser Company offers knowledgeable sales consultants and an experienced crew capable of handling projects of various sizes and complexities. Their services cover Madison, Monona, McFarland, Verona, Fitchburg, Middleton, Sun Prairie, and nearby communities.
Fort Atkinson Glass & Mirror/Jim's Key Shop
1011 Industrial Dr, Fort Atkinson, WI 53538
Fort Atkinson Glass & Mirror / Jim's Key Shop is a locally owned business providing glass repair, mirror installation, and locksmith services in Fort Atkinson, WI. They serve residential and commercial clients across Jefferson, Dane, Walworth, and Waukesha Counties, including the Madison area. Their skilled technicians handle window repairs, sliding glass door replacements, custom shower doors, and locksmith needs such as lock repairs and key duplication. The company combines glass and locksmith expertise in one location, offering custom solutions and fast turnaround times. With decades of experience, they focus on clear pricing and responsive service.

Dotzauer Brothers Windows
madison
Dotzauer Brothers Windows is a licensed and insured company based in Madison, WI, specializing in residential and commercial window repair and replacement. They provide skilled craftsmanship for windows, doors, and siding projects, focusing on quality and customer satisfaction. The company emphasizes its commitment to excellence and has built a strong reputation in the local community.

Champion Replacement Windows of Madison
5321 Voges Rd, Madison, WI 53718
Champion Replacement Windows of Madison is a window repair and replacement company serving homeowners in Madison, WI. They offer consultation, custom manufacturing, installation, and service for windows, sunrooms, siding, and doors, all made in the USA. Founded in 1953, Champion provides single-source accountability, handling everything from product selection to lifetime service. Their products meet Energy Star® standards to help reduce heating and cooling energy use. Champion also offers a limited lifetime warranty on their products and services.
Common Window Problems in Janesville
The seasonal extremes of Wisconsin's climate put significant stress on residential windows. Understanding the root cause of a problem is the first step toward an effective and lasting fix. Here are the most frequent issues homeowners in Janesville encounter.
Drafts and Air Leaks
Feeling a chill near your windows, especially during a Janesville winter, is a telltale sign of an air leak. This problem is often caused by degraded weatherstripping, cracked or shrunken caulking, or gaps between the window frame and your home's structure. Not only do drafts make rooms uncomfortable, but they also force your heating system to work harder, increasing energy costs 1 2.
Condensation and Foggy Glass Between Panes
When you see persistent fog, moisture, or dirt trapped between the glass panes of a double- or triple-pane window, it indicates a failed seal. The insulating seal around the Insulated Glass Unit (IGU) has broken, allowing moisture-laden air to enter the space designed to be airtight. This compromises the window's thermal performance and clarity. In many cases, the entire IGU can be replaced without needing to replace the whole window frame 1 3 4.
Broken or Cracked Glass
A cracked pane can result from impact, extreme temperature fluctuations (thermal stress), or structural settling. A broken window is a security risk, an energy drain, and a potential safety hazard. Repair typically involves removing the broken glass and installing a new pane or a new sealed IGU, depending on your window type 3 5.
Sticking Windows and Hardware Failures
Windows that are difficult to open, close, or lock are a common nuisance. This can be due to several factors: warping of the wood or vinyl sash from moisture, accumulation of paint or dirt in the tracks, or failure of the internal window balances or springs. Broken locks and latches also fall under this category of hardware repair 1 6 7.
Professional Repair Solutions and What to Expect
For most homeowners, hiring a local professional is the safest and most reliable path to a quality repair. Here's a breakdown of how experts typically address the issues above.
Sealing Drafts: Caulking and Weatherstripping
A technician will first identify the source of the draft. Exterior caulking is applied to seal gaps between the window trim and your home's siding. For gaps around moving parts, new weatherstripping-available in various materials like vinyl, foam, or metal-is installed. This service is generally quick, often completed in a few hours, and is one of the most cost-effective ways to improve home efficiency 1 2.
Solving Foggy Windows: IGU Replacement
When the seal on an insulated glass unit fails, the repair involves removing the interior window stops (the trim holding the glass in place), taking out the faulty IGU, and installing a new, sealed unit. The new glass is often custom-ordered to match the size and specifications (like Low-E coatings or argon gas fill) of the original. This process preserves your existing window frame and is a smart alternative to full replacement 3 5 4.
Glass Pane and Sash Repair
For a single pane of glass, a professional will carefully remove the broken pieces, clean the frame, and install a new pane using glazing putty and points. For double-pane windows with a broken outer or inner pane, replacing the entire IGU is usually required. If the window sash (the movable part of the window) itself is damaged, repairs can range from patching and sealing wood to completely rebuilding or replacing the sash 5 7.
Restoring Operation: Balance and Hardware Repair
If a window won't stay open, the window balances-springs or coils hidden in the frame-are likely worn out. A repair person can disassemble the window jamb liner to access and replace these components. Sticking windows may need their tracks cleaned and lubricated, or the sash may need to be planed or adjusted for a better fit. Hardware like locks and handles can be directly replaced with new parts 6 7.
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Understanding Repair Timelines and Costs in Janesville
The scope of the repair directly influences how long it will take and what it will cost. Local factors, like the availability of custom glass from suppliers, also play a role.
Project Timelines
- Minor Repairs (Caulking, Weatherstripping, Simple Hardware): These services can often be completed in a single visit, sometimes within a few hours 1.
- IGU or Glass Replacement: This is the most variable timeline. Once measured, a new insulated glass unit must be ordered from a fabricator. In the Janesville area, you can expect this process to take anywhere from a few days to several weeks, depending on the glass type and supplier lead times 3 5.
- Complex Sash or Frame Repair: Repairs to rotted wood or a warped frame may take a day or more, depending on the extent of the damage and the need for parts or custom milling.
Cost Factors for Window Repair
Repair costs are not one-size-fits-all. Key variables include:
- Window Type and Size: Larger windows, picture windows, or specialty shapes cost more to repair than standard double-hung or sliding windows.
- Frame Material: Repairing a wood window frame (e.g., fixing rot) is typically more labor-intensive and costly than working on vinyl or aluminum.
- Glass Specifications: Standard double-pane glass is less expensive than units with Low-E coatings, argon gas fills, or tempered safety glass.
- Extent of Damage: A simple seal replacement is less costly than repairing significant water damage to the surrounding frame.
Janesville Area Pricing Estimates
Based on regional data, here are approximate price ranges for common repairs per window1 3 5 6 7 8:
- Draft Sealing (Caulk/Weatherstripping): $50 - $200
- Insulated Glass Unit (IGU) Replacement (for foggy glass): $150 - $350+
- Broken Glass Pane Replacement (Single Pane): $150 - $400
- Window Balance or Spring Repair: $25 - $100
- Sash Repair or Adjustment (for sticking windows): $100 - $250+
Important Note: These are general estimates. The most accurate way to determine the cost for your specific situation is to obtain detailed quotes from local contractors.
Choosing a Window Repair Professional in Janesville
Taking a local, informed approach will help ensure a successful repair project.
- Seek Local Expertise: Look for established, licensed, and insured contractors based in or serving the Janesville area. They will have experience with the specific challenges posed by Wisconsin's climate and local building practices 2 4.
- Get Multiple Estimates: It is highly recommended to get at least two or three detailed, written estimates. This allows you to compare not only price but also the proposed approach, timeline, and warranty offered.
- Ask the Right Questions: Inquire about the technician's experience with your specific window brand or problem. Ask what brand of parts or glass they use and what kind of warranty covers both materials and labor.
- Consider an Energy Audit: If drafts are a widespread issue in your home, a professional energy audit can use tools like blower door tests and thermal imaging to pinpoint the most significant sources of air leakage, helping you prioritize repairs for maximum impact 2 9.
Frequently asked questions
Sources
Footnotes
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How Much Does Window Repair Cost? | 2025 Prices - Modernize - https://modernize.com/windows/repair-cost ↩ ↩2 ↩3 ↩4 ↩5 ↩6
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Window Draft Solutions Wisconsin: Fix Drafty Windows Now - https://www.wiscoroofing.com/window-draft-solutions-wisconsin/ ↩ ↩2 ↩3 ↩4
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Window Repair vs. Replacement: 2025 Cost Breakdown - https://www.budgetglasscompany.com/blog/window-repair-vs-replacement-2025 ↩ ↩2 ↩3 ↩4 ↩5
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Window Condensation in Wisconsin 2025: Causes & Solutions - https://www.wiscoroofing.com/window-condensation-in-wisconsin/ ↩ ↩2 ↩3
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Window Repair Cost: What You'll Actually Pay - https://argowindowrepair.com/blog/window/window-repair-cost ↩ ↩2 ↩3 ↩4 ↩5
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Window Repair Cost: Average Prices & What You'll Pay In 2025 - https://reconroof.com/blog/window-repair-cost/ ↩ ↩2 ↩3
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How Much Does Window Repair Cost? (2023 Prices) - HomeGuide - https://homeguide.com/costs/window-repair-cost ↩ ↩2 ↩3 ↩4
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Window Repair Cost Guide by State 2026 - EcoWatch - https://www.ecowatch.com/windows/repair/cost ↩
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1-step cost calculator for replacement windows in Wisconsin - https://www.infinityroofing.com/wi/window-cost-calculator ↩