Insulation

Insulation is the material that helps regulate your home's temperature by slowing heat transfer through walls, attics, and floors. Whether you're upgrading old fiberglass batts, sealing air leaks, or exploring spray foam options, the right insulation keeps energy bills down and comfort up year-round. Angi connects you with local pros who can assess your needs and provides resources to guide every step of your project.

Related to Insulation Service

Insulation Service Articles and Advice
Kate Fann  •  Apr 16, 2026
How Much Does It Cost to Insulate a Wall? [2026 Data]
How much does it cost to insulate a wall? This guide breaks down the associated costs and variables to consider when setting your project budget.
Deane Biermeier  •  Apr 16, 2026
How Much Does Wool Insulation Cost to Install? [2026 Data]
Wool insulation offers a higher R-value than fiberglass but is more expensive. Use this guide to estimate wool insulation costs for your home.
Heather Ayer  •  Apr 10, 2026
Why Adding Insulation to Your Attic Is a Must-Do Project for Your Home
Installing attic insulation can save you money on your energy bills if done correctly. Read this before adding insulation to your attic to get the most energy savings.
Kate Fann  •  Apr 10, 2026
Pros and Cons of Spray Foam Insulation
Weigh the pros and cons of spray foam insulation before choosing an insulation to keep your home comfortable.
Mizuki Hisaka  •  Apr 10, 2026
6 Reasons to Use Insulation for Your Bathroom Walls: Preventing Mold, Rot, and More
As you plan your bathroom, you might wonder whether you need insulation for the bathroom walls. This guide covers what you need to know to get the project done right.
Amy Freeman  •  Apr 10, 2026
Insulation Calculator: How Much Insulation Do I Need?
Wondering how much insulation to buy? Use our calculator to determine how much insulation you need based on your home's square footage and R-value needs.
Allie Ogletree  •  Apr 10, 2026
Blown-In Insulation: What You Need to Know
If you’re wondering what blown-in insulation is, keep reading to discover everything you need to know about this type of insulation for your home.
Deane Biermeier  •  Apr 10, 2026
How Much Blown-In Insulation Do I Need in My Home?
How much blown-in insulation do I need? Requirements vary by location and material choice. Learn how to estimate your needs for blown-in insulation.
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Common Insulation Service Questions

Once installed, injection insulation requires little maintenance, but periodic inspections for air leaks or moisture buildup are recommended.

Polyisocyanurate foam, or polyiso for short, has the highest R-value per square inch: 6.5 to 6.8. Polyiso is a rigid foam that comes with a reflective foil on both sides to serve as a radiant barrier. Given its high R-value, rigid foam is usually meant for foundations and basement walls.

Caulking around a sill plate can be a good way to reduce drafts and heat loss through the small gaps between the sill plate and the foundation and between the sill plate and the framing lumber above, so it’s normally a good idea. If you’re having your sill plate replaced, ask your contractor to use a sealant between the foundation and the sill plate for the best results. If your sill plate is already installed, simply caulk the visible gaps on either side of the sill plate.

Spray foam insulation can last between 80 and 100 years, depending on the type. Closed-cell spray foam is more durable, while open-cell foam is more susceptible to moisture damage and deterioration. It's important to consult a professional installer to understand which type of foam will be used and its specific longevity. Additionally, be aware that some spray foams can damage plastic piping, so if you have PVC or CPVC pipes, discuss this with your installer.

A green home is one that focuses on conservation, with the goal often being net-zero carbon emissions and self-sustainability. It will often include some kind of self-generation equipment, like solar panels or a small wind turbine, high-efficiency electrical components and mechanicals, and high-quality insulation and air sealing to reduce the loss of conditioned air. Many green homes also include xeriscaping or rainwater collection to cut down on drainage and water consumption.