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Types of Insulation Every Homeowner Should Know

Your Home Sold Guaranteed Realty - The Salas Team

When it comes to insulating your home, contractors will use a variety of materials, methods, and quantities depending on your specific needs and location. Proper insulation is crucial for maintaining a comfortable indoor climate and enhancing energy efficiency. Here’s an overview of the different types of insulation available and their best applications.

Types of Home Insulation 

Blanket Insulation

Blanket insulation is the most commonly used type, available in sheets or rolls. Traditionally made from fiberglass, it is now also available in plastic or natural fibers. This insulation is designed to fit snugly between the standard spacing of studs on unfinished walls, and the joists and rafters of floors and ceilings. It is inexpensive and accessible for DIY enthusiasts at home improvement stores.

Blown-In Insulation

Blown-in insulation is made from materials like recycled fiberglass or cellulose (recycled newspaper), which are blown into spaces. This type of insulation is ideal for renovations because it conforms to fit existing areas without disturbing the surrounding structure. Its loose nature allows it to fill gaps and provide excellent coverage, making it a versatile option for various applications.

Spray Foam Insulation

Spray foam insulation consists of a mix of chemicals that expand into liquid foam, becoming rigid once cured. It acts as both an insulator and an air sealant, providing a high R-value. Although it requires professional installation and tends to be more expensive, the Department of Energy notes that it can ultimately save money by eliminating the need for additional weatherization tasks.

Where to Insulate?

To get the best insulation, it’s important to find the areas in your home that need more or better insulation. A home energy audit can help identify these spots. If you’re on a budget, start at the top of the house and work your way down.

For the attic, add insulation on the floor or under the roof deck, depending on where your HVAC equipment is located. Walls in colder areas can benefit from added insulation by drilling small holes, blowing in cellulose, and sealing the openings. In the basement, insulate along the rim joist and where wood meets concrete to seal gaps and improve energy efficiency. Lastly, make sure any new room additions are properly insulated, as they are often overlooked and can create gaps in your home’s insulation.


Choosing the right insulation and targeting key areas in your home can significantly enhance energy efficiency and comfort. Whether you opt for blanket, blown-in, or spray foam insulation, each type has its unique advantages. By focusing on areas like the attic, walls, basement, and additions, you can ensure your home stays well-insulated, saving you money and energy in the long run.

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