Insulation & Air Sealing Services
Looking to reduce your energy bills and make your home more comfortable year-round? Green Homeowners United specializes in expert insulation and air sealing services that help Southeastern Wisconsin homeowners fight back against drafts, leaks, and heat loss—especially during those cold Midwest winters.
Our approach always starts with a Home Energy Assessment, where we identify the most cost-effective upgrades for your home. But even if you choose to skip the assessment, we can still provide targeted insulation solutions to improve your comfort and energy efficiency—while helping you qualify for Inflation Reduction Act (IRA) rebates and incentives.
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Basement Insulation: Stop Energy Loss at the Source
Did you know up to 30% of your home’s energy loss can come from uninsulated basement walls? Concrete and cinder blocks are about as insulating as a single-pane window. That’s why insulating your basement is one of the smartest upgrades you can make.
Spray Foam: Rim Joist Insulation
The rim joist—the area between your basement walls and first floor—is the second leakiest place in most homes. Especially in homes built before 2010, this area often lacks proper insulation.
We apply about 2 inches of spray foam insulation to seal these critical gaps, stopping heat loss, reducing drafts, and helping your basement feel warmer in winter and less humid in summer.
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Meets building code
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Helps eliminate drafts
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Qualifies for IRA rebates
Rigid Foam Board: Basement Wall Insulation
We use fire-safe white rigid foam insulation that can be left exposed and still provide a clean, finished appearance. This is a great solution for insulating your basement without the expense of full drywalling.
Pros:
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Quick installation
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Mold- and moisture-resistant
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Looks like drywall, can be painted
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Great for semi-finished or unfinished spaces
Cons:
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Must be custom-cut around obstacles
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Requires a specific primer if painting
Spray Foam & Framing For Finished Basements
For homeowners looking to fully finish their basement, we offer a framing and spray foam combo. This method is ideal for older homes with uneven walls, such as fieldstone or brick.
Pros:
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Best insulation and air sealing
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Clean, finished look
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Ideal for converting to a living space
Cons:
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Longer install time
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Requires drywall to meet fire code
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Ventilation needed for 24 hours post-install
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Tyler (Chief Energy Assessor) spray foaming basement rim joists and sealing gaps where energy is lost.
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Attic Insulation: Keep the Heat Where It Belongs
9 out of 10 homes built before 2010 don’t have the 16 inches of attic insulation required by the U.S. Department of Energy. That means one thing: your heat is escaping—fast.
Attic Gap Sealing
Before adding any insulation, we seal attic gaps around chimneys, soffits, drop ceilings, and more. These gaps might look small, but they can lead to major energy waste and even let pests in.
Blown-In Insulation – Attic Floors
Using specialized equipment, we can blow in fiberglass or cellulose insulation evenly across your attic floor to reach the required R-value. This helps regulate indoor temperatures and lowers your heating and cooling costs.
Frequently Asked Questions
How do I know if my attic needs more insulation?
Signs include uneven temperatures between floors, ice dams in winter, and higher than expected heating bills. A home energy assessment measures your current attic insulation level and tells you exactly how much more you need. Find out more on what our insulation grants can do to help save you money.
What is the difference between insulation and air sealing?
Insulation slows heat transfer through walls, attics, and basements, while air sealing closes the gaps and cracks that let air leak in and out. Most homes benefit from doing both together for the best results. Read more about what upgrades save the most energy through our savings report.
How much does home insulation cost?
Cost depends on the size of your home and which areas need insulation. Many Milwaukee homeowners offset most or all of the cost through Inflation Reduction Act and Focus on Energy rebates.