Janesville's Window Replacement Contractor, Serving Southern Wisconsin & Northern Illinois
Based in Janesville, Wilco Exteriors replaces drafty, fogged, and difficult-to-open windows with options built for Midwest weather. Homeowners choose our local, licensed, bonded, and insured team for honest recommendations, dependable installation, and straightforward quotes.
Lower Energy Bills
Worn-out windows are one of the biggest reasons your furnace runs nonstop. New windows from Wilco Exteriors seal out drafts and cut the temperature swings room to room, so your heating and cooling system isn’t working overtime just to keep up.
A Home That Looks Cared For
New windows change the whole face of a house. Fresh frames, clean lines, and glass that isn’t fogged or cracked make a bigger visual difference than almost any other upgrade you can make, and they pair well with new siding if you’re doing a fuller refresh.
Real Return When You Sell
Window replacement consistently ranks near the top of home improvement projects for return on investment. Buyers notice windows that work smoothly and look good. It’s one of the easier upgrades to point to when you’re pricing a home to sell.
Old Windows Are Costing You More Than You Think
Most homeowners don’t think about their windows until something goes wrong, a pane fogs up, a lock breaks, or a draft shows up right next to the frame. By then, you’ve usually been losing money on heating and cooling already.
Here's what we run into constantly around Janesville, Southern Wisconsin, and Northern Illinois:
Wood frames swollen from moisture, or vinyl frames that have gone brittle and cracked in the cold.
Foggy glass between the panes, which means the seal has failed and the insulation is basically gone.
Windows painted shut or so out of square they won’t lock properly anymore, which is a security issue as much as a comfort one.
Drafts you can feel with your hand a few inches from the frame, especially on the north side of the house.
Why Homeowners in Janesville Choose Wilco Exteriors for Their Windows
We're locally owned and operated
So we know exactly how Wisconsin winters and Illinois humidity treat windows over time, and we spec materials accordingly.
Fully licensed, bonded and insured
With an A+ Better Business Bureau rating. Count on us for risk-free, high quality results.
We handle the whole job ourselves
From measuring and product selection through permits, installation, and cleanup. No subcontractors bouncing you around.
Every quote is written in plain language
If a window doesn’t need replacing yet, we’ll tell you that instead of upselling you.
Wilco Exteriors has spent over a decade helping homeowners across Southern Wisconsin and Northern Illinois fix the parts of their house that quietly cost them money. Windows are usually where that starts.
Premium Roofing and Exterior Renovation Home Services
Wilco Exteriors provides complete exterior home improvement services to protect your most valuable investment. Our product and service offerings include:
Window Replacement
Energy-efficient replacement windows fitted to your home’s exact openings, with options in vinyl, fiberglass, and more.
Siding Replacement
Full siding replacement that pairs naturally with a window upgrade if you’re refreshing the whole exterior at once.
Roof Replacement
Roof replacement and repair for storm damage, aging shingles, and everything in between.
Soffit/Fascia Replacement
Soffit and fascia repair or replacement to close off the gaps pests and moisture love to find.
Door Replacement
New entry and patio doors that seal properly and stop the energy loss that old sliding doors are famous for.
Gutter Replacement
Properly sized, properly sloped gutters that actually keep water away from your foundation and siding.
Client Testimonials
Reviews from Janesville, WI & Illinois homeowners we’ve helped protect their biggest investment.
Contact Us
As fellow homeowners in Janesville, we know a drafty room or a window that won’t lock properly isn’t something you want to live with for another winter.
Wilco Exteriors has spent over a decade replacing windows, doors, siding, and roofs for neighbors across the region.
Use the form to request your free, no-obligation window quote. We’ll take a look, walk you through your options, and give you a straight answer, no pressure attached.
Frequently Asked Questions About Window Replacement in Janesville, WI & Illinois
We install vinyl and fiberglass windows chosen for how they hold up in Wisconsin and Illinois weather, not just how they look on day one. We’ll walk you through the options for your specific home during your quote.
Most homes are done in a single day, sometimes two depending on the number of windows and any unexpected framing issues we find once the old windows come out.
Yes. We’ll come out, look at your current windows, and give you a straightforward quote with no obligation to move forward.
Yes, fully licensed, bonded, and insured, with an A+ BBB rating.