What is the best type of attic insulation?

• <div><p>The best type of attic insulation depends on where you live, your budget, and what stage of construction the attic is in. For example, if you're building a house, then structural insulated panels are a worthy investment since they're easy to install during construction and they're the most energy-efficient type of insulation. </p><p>Additionally, if you live in a very warm climate, then you can potentially save quite a bit of money by opting for reflective insulation, which is more affordable than comprehensive insulation but doesn't work well for cool climates. Blown-in, loose-fill, and spray foam insulation are all great options for attics in moderate climates.</p></div>

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

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Last update on February 18, 2026

Reviewed in February 2026
Great service. Showed up quickly. Found the problem. Ordered the part and installed. Very polite and considerate
PT Mechanical, LLC
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Reviewed in July 2024
Well done job. The bathroom got done. A much needed upgrade. They installed a new shower door that turned out great! They also got rid of leaks I had in the bathroom.
Home B Jam Construction LLC
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Reviewed in July 2024
Very satisfied from sales call to install. This will save us money. The sales team was knowledgeable but never pushy and the install was easy and efficient.
Public Service Solar
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Reviewed in April 2024
was a split mini unit (3) ac install. were very professional and communicated well, kept me informed throughout the process. on completion, cleaned up leaving nothing for me to do. would definitely rehire. all and all experience was uneventful and pleasant.
Keystone Home & Lighting LLC
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Reviewed in December 2023
Khan Electrical installed 3 outlets and 3 switches for me in a professional and timely manner.
Khan Electrical
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Reviewed in September 2023
They did an amazing job installing 4 windows and we will recomend them to others
Green Eco Solutions
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Reviewed in October 2022
The installer was pretty quick, knowledgeable and took care of the property, everything was neat throughout the installation, great job
H Construction Company
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Reviewed in April 2022
Leonard is very nice and professional man. He installed 3 doors for me in a reasonable amount of time and for a reasonable fee. I was very happy with the finished product.
Leonard Trotta General Contractor
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Reviewed in April 2022
Mark called and came over to look at the job. He explained how difficult it would be to install fencing around my back porch. This was an add on porch from years back and he had to crawl under it to add Wood to attach the fence. Mark gave me a great price. Since it was Easter weekend he came...
Mark McDermott Construction
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Reviewed in March 2022
They came out to install an outlet for our new electric car, so timing was everything. He came out, figured out what needed to be done, ran out for what he needed and installed the same day. Cameron was very personable and knowledgeable - he did a fantastic job and I'd have him back for any...
Thomas Edison Electric Inc
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Doorbell Installation questions, answered by experts

A plastic vapor barrier should completely cover your basement to prevent water from penetrating through the walls. This typically goes before installing insulation to prevent moisture from building up and becoming trapped on the inside of your insulation, where it can collect and lead to mold damage. Installing insulation after the vapor barrier allows for any moisture to exit the walls for better ventilation.

Yes, professionals install and upgrade insulation for all home or business areas.

The best type of attic insulation depends on where you live, your budget, and what stage of construction the attic is in. For example, if you're building a house, then structural insulated panels are a worthy investment since they're easy to install during construction and they're the most energy-efficient type of insulation.

Additionally, if you live in a very warm climate, then you can potentially save quite a bit of money by opting for reflective insulation, which is more affordable than comprehensive insulation but doesn't work well for cool climates. Blown-in, loose-fill, and spray foam insulation are all great options for attics in moderate climates.

When it comes to fiberglass insulation versus foam board, there are a few notable differences, both aesthetically and functionally. Fiberglass insulation is soft and flexible, meaning it can be squeezed into tight spaces more easily than foam board. Fiberglass insulation also has a higher R-value, making it a better pick for colder climates. However, foam board insulation can resist moisture and pest damage much better than fiberglass.

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.

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