Kosmar Windows replaces tired, drafty windows and patio doors with quiet, energy-efficient units that look right and last. Contractor pricing, clean installs, and no large corporate markups.
We focus on replacement windows and patio doors — nothing else. Our main manufacturer is Advanced Windows, and that focus is why our installs are cleaner, faster, and built to last.
Advanced Window Corp. vinyl windows and doors, made by a Chicago-based manufacturer. Manufacturer warranty: 20 years on glass, 10 years on paint, and 8 years on parts.
Double-hung, casement, picture, slider, bay, and bow windows. We install vinyl and fiberglass options, with Advanced Windows as our main manufacturer.
Sliding glass, French swing, and multi-slide patio doors built for everyday use. Smooth rollers, secure locks, and screens that actually stay on track.
A few completed installs from homes and buildings we have worked on — clean frames, tight lines, and glass that changes the feel of the room.
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Follow @kosmar_windowsOur installers are on payroll, trained on our system, and accountable to you. You'll see the same faces from first measure to final walkthrough.
Modern Low-E, argon-filled glass and full-perimeter foam sealing dramatically cut drafts and outside noise. Most clients see meaningful energy savings the first winter.
You're working with installers, not a sales machine. We keep overhead lean and price the glass, frame, install, trim, and disposal clearly so you know what you're paying for.
Drop cloths, shoe covers, and a vacuumed work area before our crew leaves at the end of each day. Old units and packaging are hauled away.
Whole-home window replacements are typically complete in 1–2 days. We schedule by the project, not by stuffing four homes into a calendar slot.
Manufacturer glass and frame warranties apply to the product, and our own 1-year workmanship warranty covers the installation. One number to call if anything's off.
Tell us a little about your home and what you want to replace. We'll get back the same business day to schedule a visit.
We measure, show real Advanced Windows frame and glass samples, and answer questions. You get a written, itemized quote without the large corporate markup or “today-only” pricing games.
Your windows and doors are built to spec at the factory. Typical lead time is 3–6 weeks; we'll keep you updated as your order moves.
Our in-house crew installs, trims, seals, and cleans up. We finish with a walkthrough so you know how each unit operates.
We spec the glass package to your climate, not the cheapest unit on the truck. Because you work directly with contractors, you avoid the large corporate sales markup while still getting the parts that decide how long your windows last: foam insulation, flashing, and a proper seal to the rough opening.
Share a few details and we'll follow up the same business day. There's no obligation, and we won't pass your information to anyone else.
Most whole-home window replacements are complete in one to two days. A single patio door is usually a same-day install. We schedule by the project so we're not splitting attention between several homes at once.
Pricing depends on the size of the opening, the frame material, and the glass package. After an in-home measure, you'll get a written, itemized quote — so you can see exactly what you're paying for and compare apples to apples.
No. We pull and install one opening at a time, so your home is sealed and secure every night. If weather is a concern, we plan the sequence around it.
Yes. Trim work and finish caulking are included on every install — they're part of the job, not an upcharge added at the end.
Advanced Windows is our main manufacturer. Their manufacturer warranty includes 20 years on glass, 10 years on paint, and 8 years on parts. Kosmar Windows also provides a 1-year workmanship warranty on the installation, so if something is off with the install, you call us directly.
Get a free, no-pressure quote — we'll be back to you the same business day.
