Injection Foam Insulation for Existing Walls in Illinois and Indiana
Seal hidden gaps. Reduce energy waste. Get year-round comfort.
If your home has cold rooms, high energy bills, or walls that feel drafty, the problem might be poor or missing insulation. Injection foam fills those empty cavities without opening your walls.
We drill small holes from the exterior, inject expanding foam, and seal everything back, giving you better comfort, quieter rooms, and real energy savings in just one day.
WHY HOMEOWNERS CHOOSE ASSURED FOR INJECTION FOAM INSULATION
BPI-certified team with deep expertise in retrofitting existing homes
Low-expansion, high-density foam that fully seals wall cavities without damaging drywall
Improved comfort, energy efficiency, and indoor air quality—without major renovation
Ideal solution for older homes with empty walls or poor-performing insulation
Local, independent, and trusted across Illinois and Northwest Indiana
Fast, clean installation with minimal disruption to your home
Long-term savings on heating and cooling costs through better thermal performance
FAQ – Common questions about blow-in attic insulation
What is injection foam insulation made of?
Will it damage my drywall or siding?
How long does the installation take?
Does it reduce noise between rooms or from outside?
Is injection foam safe for my family?
Can I add injection foam to walls that already have insulation?
Is this eligible for energy rebates or tax credits?
Injection foam insulation across Illinois and Northwest Indiana
Older homes across Illinois and Northwest Indiana are often under-insulated, especially in neighborhoods built before energy codes were enforced. From historic homes in Joliet to mid-century builds in Crown Point, many still have empty wall cavities or failing fiberglass batts. That’s where injection foam makes the biggest impact.
At Assured Insulation Solutions, we’ve helped homeowners from Frankfort to Gary seal drafty walls, reduce HVAC strain, and improve comfort without tearing out drywall. Whether you're in Tinley Park, Naperville, New Lenox, or Michigan City, our team is local, certified, and ready to upgrade your home's efficiency with clean, non-invasive wall insulation.
Explore related insulation and performance services in Illinois and Northwest Indiana
Injection foam insulation is just one way we help homeowners maximize comfort and efficiency. Assured offers a full range of building performance upgrades, each tailored to your home’s structure and energy needs.
Related services we offer:
Blow-in attic insulation
Aerosealing
Heat pumps
New cooling system installation
AC Repair
Cooling system replacement
Ductless Solutions
New heating system installation
Heating repair
Heating system replacement
Home Energy Assessments and Audits
Painting & Drywall
Each service starts with a free inspection and is backed by our satisfaction-first guarantee. We’ll explain every step, show you where energy is being lost, and build a solution plan that pays off in comfort and savings.
How injection foam improves wall performance
Most energy loss in older homes happens through the walls, especially when they’re uninsulated or only partially filled with fiberglass batts. Injection foam changes that. Once installed, it expands to fill every corner of the cavity, sealing off air leaks and creating a dense thermal barrier.
This upgrade does more than keep your home warm in winter and cool in summer. It helps your HVAC system work more efficiently, reduces dust and allergens coming through walls, and dampens outside noise. It’s especially valuable in homes with drafty rooms, uneven temperatures, or high energy bills.
At Assured, we don’t just insulate, we optimize. Our team inspects each wall assembly, identifies performance gaps, and uses injection foam to close them completely.
Risks and home impacts of poor wall insulation
Wall insulation isn’t just about temperature, it protects your home’s structure, air quality, and energy performance. Homes across Illinois and Northwest Indiana with under-insulated walls face risks that build over time, from hidden moisture to rising utility costs.
Moisture buildup and interior damage
Gaps in wall insulation allow humid air to condense inside cavities, leading to damp drywall, mold growth, and rot in wood framing, especially in older homes with no vapor barrier.
Uneven heating and cooling
Poorly insulated walls allow temperature swings between rooms and floors. HVAC systems struggle to keep up, increasing energy use and shortening equipment lifespan.
Reduced home value and energy score
uyers notice cold spots, drafty walls, and noise transfer. Energy audits flag under-insulated walls, which can lower your home’s marketability and appraisal value.
Higher energy bills year-round
Unsealed wall cavities are a direct path for conditioned air to escape. This forces systems to run longer and harder, increasing costs every season.
Sealing your walls with injection foam insulation is a proactive way to avoid these issues, protect your investment, and enjoy a consistently comfortable home.
Why professional installation is essential for injection foam insulation
Injection foam is not a DIY job. It requires experience with closed-wall cavities, pressure-controlled equipment, and precise diagnostics to ensure complete coverage without damage. Here's why working with certified pros like Assured matters:
1. Every wall cavity is different
Homes in Illinois and Indiana vary in age, framing style, and exterior finish. We scan for wires, pipes, and obstructions before drilling, so no utilities are hit and every section gets filled.
2. Precision matters during injection
Foam must be injected at the right speed and density. Overfilling can bow walls or damage drywall, while underfilling leaves cold spots. We calibrate equipment to each wall’s conditions.
3. Sealing gaps requires trained building science
We don’t just insulate, we target thermal bridging and air infiltration points most homeowners miss. That means better performance and lower energy waste.
4. No damage, no mess
Our install process leaves siding and drywall intact. We patch small injection holes cleanly, and the work is usually done in a day, with zero cleanup stress for you.
5. Long-term results, backed by warranty
Our work is certified, tested, and guaranteed. You’ll feel the difference immediately and save on energy every season after.
Don’t wait, get a wall insulation inspection and custom plan
Drafty rooms, high energy bills, uneven temperatures, these problems won’t solve themselves. Whether your home is older and uninsulated or you’ve noticed cold spots that never go away, injection foam may be the fix you didn’t know you needed.
At Assured, we start with a free inspection. No pressure, no guesswork, just real answers.
We’ll assess your walls, check for insulation gaps, and show you how much energy (and money) you’re losing. Then we build a plan tailored to your home, your budget, and your comfort goals.
If your walls are costing you, we’ll help you stop the waste for good.
Contact Information
Assured Insulation Solutions, LLC
22530 Center Road, Frankfort, IL 60423
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