How much blown-in insulation do I need for my home?

• <div><p>The amount of insulation you need will vary depending on where you live. <a href="https://www.energystar.gov/campaign/seal_insulate/identify_problems_you_want_fix/diy_checks_inspections/insulation_r_values">Energy Star</a> recommends certain minimum insulation values in different geographic regions. In most cases, however, even adding a little insulation is better than not adding any.</p></div>

Can I use canned spray foam as insulation?

• <div><p>Canned spray foam has an R-value of R-3.7 per inch. However, it’s not great for use as insulation. Also known as single-component spray foam, it doesn’t expand as much as two-part types that work for insulating the whole house. Save the canned foam for gaps around doors and windows.</p></div>

Get matched with top insulation pros in Percy, IL

Q: How long does it take to remove blown-in insulation from an attic?

• <div><p>Depending on the size, insulation condition, and removal method, it can take anywhere from four hours up to twenty hours. Therefore, be prepared to split the projects into phases, or leave it to a professional. Insulation is an intermediate project with various risk factors and can be challenging to someone unfamiliar with the process.</p></div>

Q: Are there eco-friendly blown-in insulation options?

• <div><p>Yes, eco-friendly blown-in insulation options include materials made from recycled cellulose or wool. These offer excellent thermal performance and sustainability, reducing energy consumption and environmental impact while enhancing home efficiency.</p></div>

Q: Does an attic floor need a vapor barrier?

• <div><p>Vapor barriers in attics are a bit outdated and most areas no longer recommend them for attic spaces. For vented attics, the best method is usually to install drywall and cover it with latex paint before attaching insulation fiberglass, cellulose, or foam insulation. When renovating an attic to use as a living space, a contractor can guide you on the best way to cover insulation.</p></div>

Enter your zip and get matched with up to 5 pros

Need a pro for your insulation service project in Percy, IL?

Select your specific project to find the pro for you.

Insulation questions, answered by experts

The amount of insulation you need will vary depending on where you live. Energy Star recommends certain minimum insulation values in different geographic regions. In most cases, however, even adding a little insulation is better than not adding any.

Depending on the size, insulation condition, and removal method, it can take anywhere from four hours up to twenty hours. Therefore, be prepared to split the projects into phases, or leave it to a professional. Insulation is an intermediate project with various risk factors and can be challenging to someone unfamiliar with the process.

Yes, eco-friendly blown-in insulation options include materials made from recycled cellulose or wool. These offer excellent thermal performance and sustainability, reducing energy consumption and environmental impact while enhancing home efficiency.

Vapor barriers in attics are a bit outdated and most areas no longer recommend them for attic spaces. For vented attics, the best method is usually to install drywall and cover it with latex paint before attaching insulation fiberglass, cellulose, or foam insulation. When renovating an attic to use as a living space, a contractor can guide you on the best way to cover insulation.

Canned spray foam has an R-value of R-3.7 per inch. However, it’s not great for use as insulation. Also known as single-component spray foam, it doesn’t expand as much as two-part types that work for insulating the whole house. Save the canned foam for gaps around doors and windows.

The Percy, IL homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.

See all articles

Paige Bennett
•
May 2, 2026May 2, 2026
How Much Does It Cost to Rent a Blown-In Insulation Machine? [2026 Data]
Learn the key factors that influence the cost of renting a blown-in insulation machine.
Haley Nothstein
•
May 30, 2026May 30, 2026
How Much Does Spray Foam Insulation Cost? [2026 Data]
Trying to calculate how much spray foam insulation costs? Our in-depth guide breaks down pricing by type, amount, and where you install it.
Haley Nothstein
•
Mar 18, 2026Mar 18, 2026
How Much Does It Cost to Insulate a Garage? [2026 Data]
How much does it cost to insulate a garage? Discover insulation options, prices, and expected and unexpected circumstances that affect the project cost.
Kyle Schurman
•
May 2, 2026May 2, 2026
Fiberglass Insulation vs. Foam Board: Pros, Cons, and Cost
When comparing fiberglass insulation versus foam board, each has certain areas where it works better. Learn more about these home insulation options.
Scott Dylan Westerlund
•
May 3, 2026May 3, 2026
Should You Insulate the Attic Floor or Ceiling?
How to decide if you should add insulation to your attic floor or ceiling to make your home more efficient
Deane Biermeier
•
May 2, 2026May 2, 2026
How to Insulate Plaster Walls in a Home
Learning how to insulate plaster walls can help improve your home's energy efficiency. However, there are crucial cautions to consider before attempting.