Why Chicago Homeowners Trust OTS Chicago Insulation
Who We Are
A Team Committed to Excellence
Built on Better Work
OTS Chicago Insulation was started because too many Chicago-area homeowners were getting insulation jobs that looked finished but were not done right. Thin coverage, wrong materials, missed areas — problems that only showed up weeks later when the heating bill arrived. Ofer Tsemah built this company around one standard: install it correctly the first time. No revisits, no excuses, no cutting corners to move on to the next job faster. Every home gets the same level of care regardless of the size of the project.
Chicago Homes, Real Experience
Working in Des Plaines, Schaumburg, Arlington Heights, and across the Chicago suburbs gives you a very specific understanding of what homes here deal with. The cold infiltrates through attics, crawl spaces, and walls in ways that are predictable once you have seen it enough times. We have. That experience shapes how we assess every home and what we recommend. We do not apply a generic solution to every property — we look at your specific situation and address what is actually losing you heat and money.
Our Track Record
Numbers That Speak for Themselves
13+
Years
In Business
600+
Major Projects
Completed
2000+
Happy
Customers
16+
Cities
Serving
Our Team
Your Dedicated Home Experts
Ofer Tsemah
Owner & Insulation Specialist
Ofer oversees every project from the initial assessment through to final installation. His approach is direct — look at what the home actually needs, recommend only what will make a real difference, and install it to a standard that holds up over time. If something does not meet that standard, it gets corrected before the job is called done.
Our Services in Illinois
Insulation Services for Every Part of Your Home
Attic Insulation Installation
The attic is where most homes lose the most heat — and most homeowners do not realize it until they see their heating bill. We assess your current attic insulation, remove what is damaged or outdated, and install new material to the correct R-value for Illinois winters. The result is a home that stays warmer in winter, cooler in summer, and costs less to maintain year-round.
Crawl Space Insulation & Encapsulation
A cold, damp crawl space affects the entire home — from cold floors above to moisture problems that spread over time. We insulate the crawl space walls and floor, then seal the space completely to stop ground moisture from getting in. This protects your home's structure and improves air quality throughout the house. It is one of the most overlooked upgrades with one of the biggest impacts.
Spray Foam Insulation
Spray foam does two things at once — it insulates and seals air leaks in a single application. We install both open cell and closed cell spray foam depending on the area and what the space requires. Closed cell is ideal for areas with moisture concerns like crawl spaces and exterior walls. Open cell works well for interior walls and attics where flexibility and sound absorption matter.
Air Duct Insulation
Uninsulated or poorly insulated air ducts lose a significant amount of conditioned air before it even reaches the rooms in your home. We insulate ductwork to keep the air at the right temperature as it travels through your system. This reduces strain on your HVAC unit and lowers your monthly energy costs. It is a straightforward service that makes a real difference in how efficiently your home runs.
HVAC Optimization & Air Sealing
Even a well-insulated home can lose efficiency if air is escaping through gaps around windows, doors, electrical outlets, and penetrations in the building envelope. We locate and seal those leaks to work alongside your existing insulation and HVAC system. The result is a tighter home that holds temperature better and puts less demand on your heating and cooling equipment. Most homeowners notice the difference in comfort almost immediately.
Noise Reduction & Acoustic Control Solutions
Insulation is not only about temperature — the right materials make a significant difference in how much sound travels between rooms, floors, and from outside into your living space. We install dense insulation products specifically rated for acoustic performance in walls, ceilings, and floors. This is especially useful in multi-unit buildings, home offices, and bedrooms near busy streets. The result is a noticeably quieter, more comfortable home.
Moisture Control & Indoor Air Quality Solutions
Excess moisture inside a home leads to mold, structural damage, and air quality problems that affect your family's health over time. We identify where moisture is entering the building and address it through proper insulation, vapor barriers, and sealing. Controlling moisture at the source protects your home long-term and keeps the air inside cleaner. This service is especially important for older Chicago-area homes with crawl spaces and unfinished basements.
Energy Efficiency & Comfort Improvements
If your home has uneven temperatures, rooms that never seem to warm up, or energy bills that keep climbing, the insulation is usually the reason. We assess your home's thermal performance and identify exactly where energy is being lost. From there, we recommend and install targeted improvements that make a measurable difference. The goal is a home that stays comfortable without overworking your heating and cooling system.
Comprehensive Insulation Services
Some homes need more than one area addressed — and doing them together is always more effective than treating each one separately. We provide full-home insulation assessments covering the attic, walls, basement, crawl space, and ductwork. Once we know what the home needs, we build a plan that addresses everything in the right order. Residential and commercial properties across the Chicago area are both welcome.
Basement & Rim Joist Insulation
The basement walls and rim joists — the area where the floor frame meets the foundation — are among the most common sources of cold air and energy loss in Chicago homes. We insulate both to stop cold air infiltration and reduce heat loss through the foundation. This keeps basement spaces warmer, reduces cold floors on the level above, and helps your entire heating system work more efficiently through the winter months.
Blown-In Insulation (Fiberglass & Cellulose)
Blown-in insulation is one of the most effective ways to achieve even, consistent coverage across an attic or wall cavity. We work with both fiberglass and cellulose material depending on the area being insulated and the performance target. The blown-in method fills gaps and irregular spaces that batts or panels cannot reach effectively. It is a reliable, well-tested approach that works particularly well in older homes where coverage has deteriorated.
Wall Insulation (Drill & Fill, Netting & Filling)
Many older homes in the Chicago area were built with little to no insulation inside the wall cavities. The drill and fill method lets us inject insulation directly into the wall without removing the drywall — small holes are made, filled, and patched cleanly afterward. The netting and filling method uses a mesh backing to hold the material in place within the cavity. Both approaches significantly improve thermal performance with minimal disruption to your home.
Flat Roof & Roofline Insulation
Flat roofs and low-slope rooflines present specific insulation challenges that standard attic methods do not address. We insulate flat roof assemblies to protect the structure, stabilize interior temperatures, and reduce the risk of moisture damage from the inside out. Roofline insulation along sloped ceilings and knee walls is handled with the same attention to detail. Both services extend the life of your roof while improving the overall energy performance of the building.
Drywall Repair & Installation
Insulation work sometimes requires access behind walls or ceilings — and when it does, the drywall needs to be repaired or replaced properly. We handle drywall repair and installation so you do not need to coordinate a separate contractor after the insulation is done. Repairs are finished to match the existing wall texture and leave a clean result. It is one less thing to manage and keeps the entire project moving under one team.
Batt Insulation (Fiberglass & Rockwool)
Batt insulation comes in pre-cut panels designed to fit between standard wall studs and floor joists, making it a practical choice for open-wall renovation projects and new construction. We install both fiberglass and rockwool batts depending on the thermal and acoustic requirements of the space. Rockwool in particular offers strong fire resistance and better sound absorption alongside its thermal performance. Installed correctly with full coverage and no gaps, batt insulation delivers consistent, long-lasting results.
High energy bills? Drafty rooms? Cold floors that never warm up?
Get a Free Estimate and Find Out Exactly What Your Home Needs to Perform Better This Winter
DISCOVER WHAT OUR CUSTOMERS HAVE TO SAY ABOUT US
REVIEWS
Review us on Google
⭐⭐⭐⭐⭐
Our Simple 3-Step Service Process
1
We Start With a Real Assessment
Before any material goes into your home, we take a proper look at what is actually happening. That means checking your attic, walls, crawl space, basement, and ductwork — wherever heat loss is likely occurring. We identify the problem areas, measure what is there, and give you a clear picture of what needs to be done and why. No guessing, no upselling areas that do not need attention. You get a straight answer based on what we find in your specific home.
2
We Tell You Exactly What We Recommend and Why
Once we have assessed the home, we put together a clear recommendation — the right materials, the right areas to address, and the order that makes the most sense. We explain what each part of the job does and what you can expect from it. If something does not need to be replaced or upgraded, we will tell you that directly. The goal is for you to make an informed decision, not to approve the biggest possible scope of work. Pricing is straightforward with no hidden additions once the job begins.
3
We Do the Work and Leave It Clean
Installation is handled by our own team — not subcontracted out. We use the correct material for each area, install it to the correct thickness and coverage, and make sure nothing is left incomplete before we consider the job finished. If drywall repair is needed after the insulation work, that gets handled by the same team before we leave. Your home is left clean and in order. We do a final walk-through to confirm everything meets the standard we set at the start of the project.
Ready to get started?
Frequently Asked Questions
Got Questions? We’ve Got Answers!
How do I know if my attic insulation needs to be replaced?
The most common signs are uneven temperatures between floors, higher-than-normal heating and cooling bills, and ice dams forming along your roofline in winter — all very common in Des Plaines and surrounding areas. You can do a quick check yourself: if the insulation sits at or below the floor joists, it is likely underperforming. A professional assessment gives you the full picture, including moisture damage or settling that is not visible at a glance.
What is the difference between open cell and closed cell spray foam insulation?
Closed cell spray foam is denser, provides a higher R-value per inch, and creates a strong moisture barrier — making it the right choice for exterior walls, crawl spaces, and areas prone to humidity. Open cell foam expands more freely and works better for interior walls and attics where flexibility matters more than density. Both types seal air leaks while insulating, which gives them an advantage over standard batt insulation in many applications. The right choice depends entirely on where it is going and what that space requires.
How much can I save on energy bills after insulating my home?
The answer depends on how under-insulated your home currently is and which areas are addressed. Homes with outdated or missing attic and wall insulation in the Chicago area often see noticeable reductions in heating and cooling costs after a proper installation. Air sealing combined with new insulation typically produces the largest impact because it stops conditioned air from escaping through gaps that insulation alone does not address. An assessment of your specific home gives you a realistic expectation before any work begins.
Can wall insulation be added without removing drywall?
Yes — the drill and fill method allows us to inject insulation directly into the wall cavity through small holes made in the wall surface, either from the interior or exterior. The holes are patched and finished cleanly, leaving minimal visible evidence of the work. This approach is particularly common in older Chicago-area homes that were built without adequate wall insulation. It is one of the most effective ways to improve thermal performance without the cost and disruption of a full drywall removal.
What does crawl space encapsulation actually do?
Encapsulation seals the crawl space completely — walls, floor, and any penetrations — to stop ground moisture from entering the space and rising into the home above it. Left untreated, crawl space moisture leads to mold growth, wood rot, poor air quality, and cold floors throughout the house. Insulating the walls and adding a vapor barrier work together to control both temperature and moisture at the source. For homes in the Chicago area with older crawl spaces, it is one of the most impactful improvements you can make.
How long does a home insulation project typically take?
Most single-area projects — an attic, crawl space, or set of walls — are completed within one day. Larger projects covering multiple areas of the home may take two to three days depending on the scope and what materials are being used. We give you a clear timeline before the work starts so there are no surprises. The space is cleaned up and left in order when the job is done.
Do you provide insulation services for commercial buildings in Chicago?
Yes — OTS Chicago Insulation works with both residential and commercial properties across the Chicago area. Commercial projects involve different scales and sometimes different material requirements, but the standard of installation remains the same. Whether it is a multi-unit residential building, an office space, or a commercial facility, we assess the property and recommend what will actually perform. Call (855) 511-5652 to discuss your specific property and get an estimate.
What areas do you serve around Chicago?
We serve Des Plaines, Chicago, Naperville, Schaumburg, Arlington Heights, Palatine, Evanston, Downers Grove, Elmhurst, Wheaton, Bolingbrook, Aurora, Elgin, Joliet, Hinsdale, Oak Brook, and Glen Ellyn. If your home or building is in the Chicago metro area and not on this list, reach out anyway — we can confirm whether your location falls within our service area. Most of our work is concentrated in the northwest and western suburbs where insulation needs are significant given the exposure to Chicago winters.
Insulate Better. Live Smarter. Save More.
Contact Us
Social
Quick Links
Services
Locations
