What is Attic Insulation?
Attic insulation is one of the most important energy efficiency upgrades you can make to your home. Heat rises, which means without proper attic insulation, you’re likely losing valuable warmth through your roof in the winter and letting in unwanted heat in the summer.
Blown-in insulation, one of the most common types for attics, fills gaps and voids easily and can be layered over existing materials. At WHI, we specialize in installing blown-in and fiberglass batt insulation to improve your home’s comfort, energy savings, and air quality. Our solutions meet or exceed Wisconsin’s building code requirements and focus on long-term performance.
Whether you live in an older home with minimal insulation or you’re simply looking to upgrade, our attic insulation services are tailored to your needs. We start with a thorough evaluation of your current insulation levels and attic ventilation. Then, we develop a plan to air seal leaks and install high-performance materials that deliver maximum R-value.
Explore other options such as wall insulation or crawl space insulation for a whole-home energy solution.
15% Savings
The EPA estimates homeowners save 15% on heating and cooling by adding attic insulation
Wisconsin homes with proper insulation can save hundreds annually
1,000 Pounds
Insulating your attic can reduce carbon emissions by up to 1,000 pounds annually
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How Our Attic Insulation Process Works
WHI’s attic insulation process begins with a full attic inspection and air sealing. We then install high-performance materials like blown-in cellulose or fiberglass to meet R-value standards and optimize energy efficiency.
Full Attic Inspection
We evaluate your attic’s current insulation depth, air leakage, and ventilation setup.
Sealing & Insulation Planning
We seal gaps and recommend the best material—like blown-in cellulose or fiberglass—to meet energy standards.
Code-Compliant Installation
Our crew installs to the appropriate R-value and performs a post-install review with rebate documentation.
Live More Comfortably While Saving Money on Energy
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Frequently Asked Questions
If you don’t see the answer to your question, feel free to give us a call to speak with one of our friendly associates.
Why is attic insulation important in Wisconsin?
Wisconsin’s extreme seasonal temperatures make attic insulation critical for comfort and cost savings. In the winter, heat rises and escapes through under-insulated attics. In the summer, your attic traps heat, making your home harder to cool. Proper insulation slows heat transfer, stabilizes indoor temperatures, and eases the load on your HVAC system. With the right attic insulation, you can expect significant reductions in your monthly utility bills and a more consistent climate in your home.
How much attic insulation do I need?
Insulation needs vary depending on your home’s structure and existing levels, but most Wisconsin homes should meet or exceed R-49 in the attic, according to DOE recommendations. If your attic has less than 13–14 inches of insulation, you’re likely under-insulated. WHI will measure your current insulation depth and advise on how much more is needed to reach optimal performance. Our attic insulation solutions are designed to meet building code and energy rebate requirements.
What type of insulation is best for attics?
Blown-in cellulose and fiberglass are two of the most effective and affordable attic insulation types. Blown-in cellulose fills irregular spaces well and is fire-resistant, while fiberglass batt insulation is suitable for attics with standard joist spacing. Spray foam can also be used for high-performance sealing but is often more expensive. WHI will help you choose the best option based on your attic’s condition, ventilation, and your energy goals.
Can I install new insulation over old insulation?
Yes. In most cases, it’s safe and effective to install new insulation over old materials as long as there’s no mold, moisture damage, or pest contamination. WHI evaluates the condition of your existing attic insulation and determines whether it can be topped off or needs removal. Adding blown-in cellulose over fiberglass batts is a common method. This process increases R-value and maximizes energy savings. Our team ensures proper layering and ventilation for peak performance.
Will attic insulation help lower my energy bills?
Absolutely. Attic insulation is one of the most cost-effective ways to reduce energy consumption in your home. By creating a thermal barrier between your living space and the outdoors, insulation prevents heat loss in winter and heat gain in summer. Homeowners typically save up to 15% on heating and cooling costs after an attic insulation upgrade. WHI ensures your insulation is installed to optimal depth and density, maximizing your return on investment.
Are there rebates for attic insulation in Wisconsin?
Yes, there are energy efficiency rebates available through programs like Focus on Energy. WHI helps homeowners qualify by ensuring insulation work meets program standards. These rebates can cover a significant portion of your project cost. During your attic assessment, our team will outline available incentives and guide you through the application process. We stay current on rebate updates so you don’t miss out on savings.