Should I remove old attic insulation before adding new?

• <div><p>Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation: </p><ul><li><p>If the insulation is over 15 years old</p></li><li><p>If the insulation is wet or moldy</p></li><li><p>If it is <a href="https://www.angi.com/articles/what-is-vermiculite-insulation.htm">vermiculite insulation</a></p></li><li><p>If you see signs of pest infestation</p></li></ul><p>Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.</p></div>

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Q: Is it OK to put plywood over insulation in an attic?

• <div><p>Installing sheets of plywood over <a href="https://www.angi.com/articles/attic-insulation-guide.htm">attic insulation</a> is a popular choice, especially in storage spaces. That said, insulation works by trapping hot air&mdash;so it needs extra space to expand and be effective, or you might reduce the energy efficiency of your home. </p><p>It&rsquo;s important that you never compress the insulation by installing flooring directly on top of it. In many houses, you&rsquo;ll need to install a subfloor before putting plywood over insulation in your attic.</p></div>

Q: Why should attic insulation installation be done professionally?

• <div><p>Ensures uniform application and maximizes insulation effectiveness and energy savings.</p></div>

Q: How long does it typically take to install attic insulation?

• <div><p>It is generally completed in a day, depending on the attic size and access difficulty.</p></div>

Q: Is ceiling insulation worth it?

• <div><p>Adding insulation to ceilings is an excellent way to increase the energy efficiency of your home. If your home's layout is such that you need insulation in the ceilings rather than in the roof, it's likely that at least some insulation already exists in the space. However, each additional inch of insulation you can add boosts the R-value by between 2.2 and 4.2. </p></div>

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Verified Reviews for Doorbell Installation pros in Alpine, WY

*The Angi rating for Doorbell Installation companies in Alpine, WY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Doorbell Installation needs.

*The HomeAdvisor rating for Doorbell Installation companies in Alpine, WY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Doorbell Installation needs.

Last update on September 25, 2026

Reviewed in September 2026
This job started as a small project and then mutated into a full siding job. He showed me the rotten/rotting plywood under my siding. He then gave honest recommendations and let us decide what route we wanted to take. He navigated supplier issues when they sent the wrong type of siding. He...
AC Builders LLC
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Reviewed in April 2026
Mindy was great. Super easy to communicate with and showed up on time. Most importantly they did a great job on our house. We are super satisfied with her work and will definitely be using her again.
Mindy
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Reviewed in October 2024
Jon does a great job! He is very good at communicating with you. He is prompt to get the job done.
Jon's Home Improvement
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Reviewed in May 2024
IOS performed the entire spectrum of lawn care from spring until winter. I can count on a professional job, done on time and to a high standard. Jake is also a pleasure to deal with.
Ivy Outdoor Services, LLC
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Reviewed in November 2022
Hemmert Electric treated us poorly. We asked for an electrical box to be installed on a pole at the old homestead. We had purchased the box in hopes of installing it ourselves but decided against it. We then asked them to install it. They kept promising to get to it, but it took over 8 weeks to...
Hemmert Electric
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Reviewed in October 2022
We are happy we found Jonathan to help with our home remodeling project. He seems to be a knowledgeable and hardworking guy, and there were no surprises when it came to billing. We would highly recommend him.
Strait Home Repair & Renovations LLC
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Reviewed in September 2022
Easy to work with and got us back up and running quickly. Highly recommend.!
Western Sky Mechanical
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Reviewed in August 2022
Plumber was knowledgeable and efficient. Did work promptly and thoroughly
Salt River Plumbing
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Reviewed in August 2021
He also helped my son by ii stalking new dorinkkef system, lawn, snd plsnts
Dahlia Landscaping
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Reviewed in May 2021
Great experience throughout. The design team was helpful in planning the look I wanted. Manny and Ely as the installers were clean and efficient. I replaced a sliding door with French doors and it was a very professional job. The materials in the product are top line. It has made such a...
Dreamstyle Remodeling of New Mexico
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Doorbell Installation questions, answered by experts

Installing sheets of plywood over attic insulation is a popular choice, especially in storage spaces. That said, insulation works by trapping hot air—so it needs extra space to expand and be effective, or you might reduce the energy efficiency of your home.

It’s important that you never compress the insulation by installing flooring directly on top of it. In many houses, you’ll need to install a subfloor before putting plywood over insulation in your attic.

Ensures uniform application and maximizes insulation effectiveness and energy savings.

It is generally completed in a day, depending on the attic size and access difficulty.

Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation:

If the insulation is over 15 years old
If the insulation is wet or moldy
If it is vermiculite insulation
If you see signs of pest infestation

Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.

Adding insulation to ceilings is an excellent way to increase the energy efficiency of your home. If your home's layout is such that you need insulation in the ceilings rather than in the roof, it's likely that at least some insulation already exists in the space. However, each additional inch of insulation you can add boosts the R-value by between 2.2 and 4.2.

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