Rigid Foam Attic Insulation in Madison, WI & Rochester, MN
Your Go-To Rigid Foam Board Installer
Our team at Larson & Keeney Home Services has been providing trusted home insulation solutions since 2009. We look beyond quick fixes and focus on long-term comfort, durability, and efficiency. Rigid foam insulation is often a key part of that strategy.
We specialize in rigid foam insulation installation for attic spaces where air leaks, moisture problems, and inconsistent temperatures are common. Our installers understand how rigid foam boards work as part of a complete system, not just as a standalone product.
Get in touch today to schedule an estimate and keep your home comfortable year-round.
What Is Rigid Foam Insulation?
Rigid foam insulation is a type of board insulation made from closed-cell foam materials designed to resist heat transfer and moisture absorption. It is manufactured in solid panels that can be cut and fitted to walls, ceilings, and attic assemblies, creating a continuous layer of insulation with minimal gaps.
Because these boards have a high insulating value and strong moisture resistance, they’re commonly used in attics where traditional insulation may not be enough. Rigid foam helps reduce air movement, limits condensation, and supports consistent indoor temperatures throughout the year.
Benefits of Rigid Foam Insulation
Rigid foam insulation offers a range of benefits that make it a reliable choice for attic insulation. Its solid structure and closed-cell design help address many of the common problems found in older or underperforming attic spaces.
Here are some key benefits of investing in proper rigid foam insulation:
Prevents Air Leaks
The foam boards create a continuous insulation layer that helps seal gaps and cracks where air commonly escapes. By limiting air movement, rigid foam insulation reduces drafts and improves overall temperature consistency throughout your home.
Controls Moisture
Because rigid foam insulation resists water absorption, it helps manage moisture levels in attic spaces. This reduces the likelihood of condensation, mold growth, and damage to surrounding materials, especially in climates that experience temperature swings.
Durable
Rigid foam insulation is designed to last for decades without settling or losing effectiveness. Unlike loose-fill or batt insulation, it maintains its shape and performance over time, making it a great long-term solution for attic insulation needs.
Reduces Noise
While not its primary function, rigid foam insulation can help reduce sound transfer by adding density to attic assemblies. This can minimize outside noise and contribute to a quieter home.
Reduces Energy Costs
By improving thermal performance and reducing air leakage, proper insulation helps lower heating and cooling demands. Over time, this can translate into reduced energy usage and a more efficient HVAC system.
Three Types of Rigid Foam Insulation
Not all rigid foam insulation boards are the same. At Larson & Keeney Home Services, we evaluate your attic layout, moisture exposure, and efficiency goals before recommending the right rigid foam board insulation for your home.
Polyisocyanurate (Polyiso)
Polyisocyanurate, often called Polyiso, is known for its high insulating value per inch. These boards often feature a foil facing, which helps reflect radiant heat and improve overall energy efficiency. While it performs best in moderate temperatures, Polyiso is commonly used in attics with limited moisture and proper ventilation.
Extruded Polystyrene (XPS)
Extruded polystyrene, or XPS, is a dense, rigid foam board that offers reliable insulation and strong moisture resistance. Its closed-cell structure helps limit water absorption, making it well-suited for attic environments where condensation or humidity may be a concern.
Expanded Polystyrene (EPS)
Expanded polystyrene, or EPS, is a lightweight rigid foam insulation that provides dependable thermal performance at a more affordable cost. While its R-value per inch is lower than Polyiso or XPS, EPS is known for its versatility and recyclability, which can appeal to homeowners looking for a more cost-conscious or environmentally responsible option.
SilverGlo™ Rigid Foam Insulation
SilverGlo™ rigid foam insulation is designed for reliable performance in attic spaces where energy efficiency and moisture control matter most. It provides consistent insulation while helping protect your home from heat loss and humidity-related issues.
These 2-inch boards are infused with graphite to improve insulating performance and feature a reflective surface that acts as a radiant barrier. They also have an insulating value of approximately R-9, or up to R-11. Thicker panels are available for projects that require higher R-values.
When you invest in SilverGlo™ insulation, you get:
- A radiant barrier that helps reduce heat transfer
- Resistance to moisture and mold growth
- Long-lasting, durable insulation
- Improved air sealing
Rigid Foam Insulation FAQs
How are rigid foam boards different from other insulation types?
Unlike loose or fibrous insulation, rigid foam does not settle over time and offers stronger resistance to moisture, making it well-suited for attic applications where long-term performance matters. The panels also create a continuous layer of insulation that helps limit air movement and thermal bridging.
What is the most eco-friendly type of rigid foam board?
Expanded polystyrene (EPS) typically requires less energy to manufacture and is recyclable in many regions. EPS also tends to last longer, which reduces the need for replacement and helps limit material waste over time.
How long does rigid foam insulation last?
When installed correctly and protected from physical damage, rigid foam boards can last 50 years or longer. Because the material resists moisture and does not compress or degrade like other insulation types, it continues to perform effectively for decades with minimal maintenance.
Your Go-To Rigid Foam Insulation Contractor in Madison, WI & Rochester, MN
At Larson & Keeney Home Services, we bring years of experience, local expertise, and a whole-home approach to every rigid foam insulation project. Our team understands the unique climate challenges in Madison, WI, and Rochester, MN, and we tailor our attic insulation solutions to support long-term comfort and efficiency.
If you’re considering rigid foam board insulation installation for your home, our team is here to help. We provide honest recommendations, clear communication, and professional installation from start to finish.
Contact our team today to schedule a consultation.