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Top-Rated Window pros in Winnebago - Updated Nov 2026

Avatar for Mad City Windows & Baths
Mad City Windows & Baths
4.4(
838
)
New Windows - 6 +New Windows - 3-5New Windows - 2

Serving Winnebago, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2001

Free estimates

Warranties offered

"The installers were wonderful. Friendly, knowledgeable, fast and CLEAN! Youâ d barely know theyâ d been there!. And our sales person really helped us understand the best, but not most expensive windows for our house. If I need more windows they will be back!"
windows
siding
siding
siding
windows

+20

Response time10 mins
7602 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Danny's Window Cleaning
Danny's Window Cleaning
5.0(
10
)
Window Cleaning

Serving Winnebago, IL and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

We help homeowners and businesses in the Janesville and surrounding areas keep their properties looking their best and protected from damage. From streak-free windows and clean gutters to driveways, siding, decks, and patios restored with pressure washing — we do it safely, efficiently, and with attention to detail.\nLicensed, insured, and focused on quality results every time.\n

Sun room
Sun room
Green house side
Green house top
Front doors

+2

13 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Mad City Windows & Bath - Madison
Mad City Windows & Bath - Madison
New to Angi
New Windows - 2New Windows - 3-5

Serving Winnebago, IL and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

To learn about Mad City Windows and its history, you need to start back in 1998 when our family-owned company first opened its doors and changed the face of home remodeling in Wisconsin. From the beginning, our business has been built on a foundation of friendship and trust and, in return, local homeowners have come to know they can place their trust in us. In order make certain that we consistently earn that trust, we are dedicated to ensuring the expert, seamless delivery of high-quality products and remodeling solutions to homeowners throughout our service area. \n \nToday, we expand our home remodeling expertise across Wisconsin, Minnesota, Iowa and Illinois. With over 50,000 completed projects, we take our 2+ decades of experience to serve the communities of Minnesota, Iowa and Illinois. They can expect our highest standard of service and professionalism.

Testimonial Letter(s)
Home Exterior + Bath
Home Exterior + Bath
Home Exterior + Bath
Home Exterior + Bath

+19

Infinity Exteriors
New to Angi
New Window - SingleNew Windows - 3-5New Windows - 2+1 more

Serving Winnebago, IL and surrounding areas

Approved (Corporate)

In business since 1997

Free estimates

Credit card accepted

At Infinity Exteriors, we set ourselves apart through our unwavering commitment to quality, craftsmanship, and customer satisfaction. Our comprehensive services include roofing, siding, windows, and gutters, all delivered with meticulous attention to detail. Our team consists of seasoned Project Advisors, Managers, and Installers who bring years of industry experience, training, and a dedication to high standards, ensuring every project meets our strict quality guidelines. \n \n

45 neighbors recently requested a quote
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Windows FAQs, answered by experts

If your windows weren’t manufactured with a retaining clip to receive muntins and hold them in place, you should contact a window company near you to add them for you. A professional will bond the muntins directly to the glass to hold them in place, and they’ll make sure the edges line up nicely with your window frames. If your window does have retaining clips to hold muntins in place, you can just pop the muntins into the clips.

A good U-factor for windows is 0.30 or lower, but they can range from 0.20 to 1.20. A general rule of thumb when it comes to the U-factor is that the lower, the better.

The purpose of an awning window is to let fresh air into your home without taking up too much wall space. They’re ideal if you live somewhere that gets a lot of rain because their design helps prevent rain from coming into your home. In bathrooms, awning windows also help with ventilation but don’t compromise your privacy.

Impact windows are a type of window made with impact-resistant glass, designed specifically for hurricanes. The glass, treated with ethylene-vinyl, can withstand winds up to 200 mph, as well as flying debris. Brands sometimes test their impact windows with large missile impact tests.

Impact windows may be required in some places. For instance, the Florida Building Code requires homes to have impact-resistant windows if they live within a mile of the coast where wind speeds can reach 110 mph or more.

Typically, a bay window is, at minimum, 42 inches wide. That said, you can always design a custom bay window that is smaller—box bay windows are usually less than three feet in width and are ideal for smaller spaces.

The Winnebago, IL homeowners’ guide to window services

From average costs to expert advice, get all the answers you need to get your job done.