If your rooms feel chilly in winter, stuffy in summer, or you notice condensation, it’s time to tighten the envelope. Apex Window Werks provides professional window insulation services in Chicago that seal air leaks, calm drafts, and stabilize room temperatures — without a full window replacement.
Window Insulation Services in Chicago
Contact Us
Our Window
Insulation Services
Whether you searched for a window insulation company inspection or you already know which rooms are drafty, we tailor every project to your windows, your budget, and your Chicago home’s conditions.
Our Chicago window repair specialists combine proven weatherization techniques with clean finishes so your windows look great and operate smoothly after service.
Air Sealing & Weatherization
We locate and seal the real leak paths around frames, sills, and trim, stopping uncontrolled air movement that makes rooms feel cold in winter and stuffy in summer. This targeted approach delivers a noticeable comfort boost without the cost of full window replacement.
Professional Caulking & Low-Expansion Foam
Old, brittle caulk and open joints are replaced with premium exterior-grade sealants for durable, flexible protection. Where gaps are larger, we use low-expansion foam for a stable fill, then finish for a neat, just-capped appearance that blends with your façade.
Operable-Sash Weatherstripping
For double-hung, casement, and slider windows, we install high-quality weatherstrips that tighten the seal while preserving smooth operation. The result is less infiltration, fewer drafts, and windows that open and close exactly as they should.
Feel the Difference in Every Room — Starting This Week!
Drafts, cold spots, rising bills? Book a same-week Chicago window insulation assessment. We’ll find the leaks, explain your options, and give you a clear, line-item estimate.
Not Sure Which Option Fits Your Situation?
Tell us where you feel drafts, and our Chicago window insulation contractors will recommend the right solution after a quick on-site assessment.
Schedule an Estimate
Or Call Us
(847) 557-9600
Signs Your Windows
Need Insulation
Not sure if you need a window insulation company or full replacement? These common issues point to air leaks and heat loss that a professional window insulation service in Chicago can fix quickly:
Drafts Near Closed Windows
If curtains move, your hand feels cool, or you hear a faint whistle, outside air is slipping through the frame and sash gaps. We seal those leak paths with professional caulking, low-expansion foam, and the right weatherstripping for your window type.
Rooms Won’t Hold Temperature
When a bedroom or living room swings hot and cold, especially on windy Chicago days, your HVAC works overtime. Our technicians target perimeter joints and sash contacts that let conditioned air escape. After sealing, rooms stabilize faster and stay comfortable longer, so the thermostat isn’t constantly “chasing” comfort.
Energy Bills Keep Climbing
Uncontrolled air infiltration forces longer heating and cooling cycles. By tightening the window perimeter and restoring proper seals, we reduce HVAC runtime and help bring utility costs back in line. You get comfort now and efficiency gains you’ll feel on your monthly bills.
Visible Gaps or Failed Caulk
Daylight through joints, cracked or brittle sealant, and separated corners are clear signs that the seal has failed. We remove compromised material, prep the surfaces, and apply premium exterior-grade sealants for a clean, durable finish that protects against drafts and moisture.
Condensation or Peeling Paint at Jambs and Sills
Moist indoor air is reaching cold surfaces — often due to air leaks around the frame. Proper air sealing limits condensation, protects woodwork and drywall, and helps prevent mildew. We’ll also advise on simple humidity best practices to keep those areas dry.
Single-Pane or Historic Windows Feel Cold to the Touch
You can keep the character of vintage Chicago windows and gain modern comfort. Low-profile interior storm panels and precise weatherization add an insulating layer and reduce noise without altering trim, sightlines, or operation.
Why Choose Apex Window Werks
for Your Window Repair Needs
Window Specialists — Not Generalists
We work on windows all day, every day — repair, restoration, and insulation backed by 15+ years serving Chicago homes. That focus delivers accurate diagnostics, proper sealing, and smooth operation.
Right-Sized, Customized Solutions
After a thorough on-site assessment, we recommend the best-value fix for your situation — from targeted air sealing and professional caulking to interior storm panels for single-pane and historic windows. Your scope is tailored to your budget, comfort goals, and timeline, with clear options and no pressure.
Clean & On-Time Installations
We show up when we say we will, with a confirmed arrival window and a quick heads-up before we’re on the way. Inside your home, we wear shoe covers, protect floors and furnishings, and keep work zones tidy from start to finish.
Transparent Pricing
No surprises. You’ll get a clear, line-item estimate that spells out materials, labor, and any optional upgrades — no vague bundles or hidden fees. If something unexpected comes up, we explain it first and get your approval before moving forward.
5-Year Workmanship Warranty & Support
Every project comes with a written workmanship warranty, plus manufacturer coverage on the products we install. If a seal settles or a draft resurfaces, our Chicago window team is easy to reach and quick to respond — we’ll make it right.
Our Window Repair Projects
What Our Clients Say
FAQs About Window
Insulation Services
How long does the window insulation process take?
Most homes can be assessed and sealed the same day. Typical timelines are a few hours for a small set of windows and one day for a whole-home scope.
Can you help with single-pane or historic window insulation?
Absolutely. We offer low-profile interior panels that add comfort and sound reduction while preserving your original windows and trim.
Is winter a good time to insulate windows?
Yes. Cold weather makes leak paths obvious, and targeted air sealing provides immediate comfort gains.
Do you offer warranties on your window repair services?
We stand behind our workmanship and materials. Your estimator will outline specific coverage for your scope.
How much does professional window insulation cost?
Pricing of window insulation depends on window count, conditions, and solutions (sealing only vs. adding film or interior panels). We’ll give you a written, line-item estimate after inspection.
Make Your Chicago Home Draft-Free — Get a Free Estimate!
Tired of cold spots and rising bills? Our Chicago window insulation contractors seal leaks fast with clean finishes, upfront pricing, and no pressure. Tell us where it’s drafty — we’ll inspect, explain your options, and get it done right the first time!
