Windows & Home Improvement Services in Sterling, Illinois

Mainstream Home Improvement has over 20 years of experience in window replacement, gutters, gutter covers, roofing replacement, and more.

Real Customer Testimonials

After 20+ years in the industry, we have served thousands of satisfied customers. Browse through our customer testimonials to see why we’re still their #1 choice.

Your Questions Answered

We think it’s important for you to understand the why when making home improvements. Here is a list of the most common questions answered for your convenience.

Flexible Financing Options Available

Replacing your windows or roof can be financially intimidating. Have peace of mind with our flexible financing options on our replacement & installation services.

Window Replacement & Home Improvement Services in Sterling, Illinois

Since 2001, Mainstream Home Improvement has been the go-to company for homeowners in need of window replacement, gutters, roofing replacement, and more. We are happy to provide honest and high-quality home improvement services in Sterling, IL. Before we complete any installation or replacement project, we make certain that you are satisfied by having our project managers take one final check at the job site before allowing you to view the results. We know a thing or two about restoring the integrity of residential homes because of our years of industry expertise in window replacement, gutters, roofing replacement, siding, and more.

Windows provide more than just a view of the outside world; they are also an important safety and design component for your house. Depending on the quality and frequency of maintenance, your windows might last anywhere from 15-20 years before needing to be replaced. Mainstream Home Improvement in Sterling, IL is here to assist with window installation and replacement when your window shatters or the seal can no longer be repaired. We will remove and replace your windows to ensure that your property looks and feels secure while also enhancing its value. We have a vast number of windows to choose from, all of which are guaranteed for life. If you’re ready to get started on your remodel, contact us to schedule an inspection and learn more about our financing and warranty options.

Types of Windows We Offer
Sterling, Illinois

As one of the leading window installation and replacement experts in the Sterling, IL area, we pride ourselves on being able to offer clients a wide selection of window options for their homes. Whether you’re looking for a standard slider window or want unique bay windows for your family home, Mainstream Home Improvement is here to help you with your upcoming project. We sit down with homeowners to determine which style of window they’re looking to install or replace on their property, while completely managing the entire installation and quality-management process. There are several types of windows we offer our clients including: 

double hung windows quad cities

Double-Hung Windows

casement windows quad cities

Casement Windows

bay window quad cities

Bay & Bow Windows

slider windows quad cities

Slider Windows

Awning Windows

sliding patio doors quad cities

Patio Doors

Why Choose

Mainstream Home Improvement

Mainstream Home Improvement offers the expertise and knowledge needed to replace your windows, gutters, roofing, siding, or sliding patio doors. For any remodeling project in Sterling, IL, our technicians are proficient in a range of installation and replacement services. There are several reasons why we continue to be the best choice for homeowners – you can rely on us to provide great results.


Customer Service

We guarantee exceptional customer service in every assignment. See why our clients rate us 5-stars in our customer testimonies.


Quality Products

High-quality materials are essential for the safety and longevity of your roof, siding, and windows. We promise long-lasting items on every assignment.


Expert Installation

We can manage any restoration job since we have over 20 years of experience replacing windows, gutters, roofing, siding, and more.


Superior Teamwork

Our team of experts understands the value of cooperation on every assignment. We place a premium on teamwork to complete your project flawlessly.

Sterling, Illinois

One of the easiest methods to prevent water from harming your foundation or roof is to invest in a high-quality gutter system that will withstand years of severe weather. Mainstream Home Improvement in Sterling, IL provides trustworthy gutter installation to prevent mildew, leaks, and decay caused by damaged or decaying gutters. Our experts apply a coating of protective synthetic felt to your gutters, ensuring years of service and avoiding roof erosion. We’ll help you choose from a selection of kinds and covers to improve the curb appeal and efficiency of your property with our professional gutter installation and maintenance services.

Gutter Covers
Sterling, Illinois

A couple of our high-quality manufacturers, GutterRoof and GutterRx™, are well-known companies that have developed a solution for blocked gutters. You’ll never have to get your hands dirty again with our cutting-edge technology: the design of our gutter covers prevents leaves, twigs, and other debris from blocking your gutter drains. Water damage to your property is one of the most typical outcomes of clogged gutters; however, our gutter covers prevent your gutters from becoming clogged or requiring regular cleaning. Running water is routed into your gutters and delivered to your street’s drainage system for quick and easy filtration using a grate-like design. Rather than wasting time collecting damp leaves from your gutters, consider our gutter covers.

Roofing Replacement
Sterling, Illinois

Mainstream Home Improvement has over 20 years of experience in residential roofing replacement throughout Sterling, IL. A leaky roof or cracked shingles due to age or extreme weather conditions is the last thing any homeowner wants to deal with – so when it comes time to replace your roof, you can count on our specialists to utilize high-quality materials that will last up to 25 years. We will evaluate the surface of your roof before laying the foundation for your new shingles to ensure there is no mold or other issues that need to be addressed before installation. Our roofing materials are guaranteed to protect your house against severe rains, strong winds, snow, hail, and ultraviolet radiation. Inquire about our financing options and schedule a roofing replacement.

Sterling, Illinois

Mainstream Home Improvement experts are here to provide quality siding installation and replacement services when your exterior has been damaged or is more than a few decades old. With hundreds of designs, patterns, and colors to choose from, we’ll find the best siding solution for your Sterling, IL home to improve curb appeal and safety. Our Alside® Vinyl Siding panels are available in 25-foot lengths to prevent installation gaps and provide a waterproof and pest-free surface. Alside® is a well-known brand renowned for producing high-quality goods that do not crack, dent, split, or blow off after installation. Call our siding replacement professionals right now for a free, no-obligation quote.

Frequently Asked Questions

We Address the Most Commonly Requested Home Improvement Questions.

Before beginning a home improvement project, our specialists want to make sure that all of your questions and concerns are answered to provide you with peace of mind. Check out our Mainstream Home Improvement specialists’ real-world responses to some of the most frequently asked questions. Don’t worry if your query isn’t addressed! Our office manager is knowledgeable about our roofing, windows, patio doors, and siding services and can provide you with all of the information you want to schedule an initial consultation.

What are some of the most common pricing games that typical window places want to play?

A “pricing game” is used in the home improvement industry to describe a contractor that gives you a very low quotation for their work to attract your business, only to charge you more when the project is completed. This also allows them to provide subpar installation services for half the price, resulting in guaranteed repairs over time. Mainstream Home Improvement delivers accurate estimates every time and does not engage in pricing games in order to provide you with the best service at the best price.

You guys have a lot of glowing reviews. Why can’t I find customer reviews on other companies’ websites?

While we’d like to think it’s because of our commitment to customer service, we know that many other home improvement companies provide identical services. Our 5-star ratings represent our 20+ years of experience and a comprehensive range of home services in Sterling, IL. Everything from roofing and siding to patio doors and gutters is our specialty. To guarantee a positive experience, our office managers respond to all of your queries before, during, and after your project.

Why do you only have production managers or owners on the final walk through?

Without a doubt! We realize how delighted homeowners are to view their freshly completed project, but our project managers insist on a last walkthrough to ensure complete satisfaction. Our staff recognizes the importance of having many sets of eyes on a single project to minimize mistakes and customer dissatisfaction. This is just another way to ensure that your roofing, window, siding, or patio door project is finished correctly and exceeds your expectations.

What Our Customers Are Saying

Our Awards

We have earned various awards in several categories since 2001. Mainstream Home Improvement continues to be an excellent option for homeowners due to our work ethic and 100% client satisfaction.

better business integrity awards logo

Mainstream Home Improvement Wins 2004 Better Business Bureau Integrity Awards

Mainstream Home Improvement Wins Score's Business Of The Year Award

Mainstream Home Improvement Wins The Rock Island Recycling Award

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