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 Arlee, MT 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 June 23, 2025

Reviewed in June 2025
They moved my piano for a reasonable price 🤩
Versatile Home Services LLC
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Reviewed in November 2023
Everyone from the sales person to the office staff and installers were prompt, professional and friendly.
Renewal by Andersen of Montana
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Reviewed in November 2023
Excellent experience all around. A quality roof at a fair price with prompt friendly service. They were extremely professional while there and thoroughly cleaned up the site when done. Highly recommend!
Elite Rocky Mountain Contracting
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Reviewed in June 2023
Professional and quality work. I would definitely recommend them for any flooring install or repair needed.
DNA Wood Working LLC
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Reviewed in April 2023
Dreamstyle did an excellent job in installing 5 new windows in our Saddlebrooke AZ home. the installers, Luis and Jesus did an impecable job in installation with the greatest care not only with the windows but the home, the eposed furnishings, etc. All were carefully covered and protected and...
Dreamstyle Remodeling of New Mexico
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Reviewed in July 2022
Put a pipe underground to evac water buildup, resurfaced my driveway. David is a great guy with excellent communication!
Mesa Excavation
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Reviewed in July 2022
David Hillard is a born and raised TRUE Montana. He knows the area and what he is talking about. His Integrity is unmatched. His number one concern is customer service, and customer satisfactory. He kept me informed during the entire process, and was always checking in with me to assure I was...
Mighty Dog Roofing of Western Montana
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Reviewed in December 2021
These guys are the best of the best at what they do! We are building a house and shop, and hired a different contractor to build both. We’ll as things progressed things with the house we’re not getting done on time and all time lines to begin working on the shop Kelly being pushed off! We’ll I...
Stag Construction
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Reviewed in April 2013
On the afternoon of April 3, 2013, the outer glass on the lower oven door on my Maytag range spontaneously shattered. I live in the Mission Valley of NW Montana, many miles from appliance repair services. After an internet search and a call to Maytag, I called Allbrands Appliance Service in...
All Brands Appliance Service, Inc.
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Reviewed in June 2012
It went fabulously!!!! Butch always shows up when he says he will. He is good to my dog. He gently reminded me that he hadn't seen payment for my last work with him (6 months ago). I was horrified. I told him I was sure I'd paid him. After I researched, I hadn't. He was such a gentleman about...
Butch's Appliance Center
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Doorbell Installation questions, answered by experts

Three signs that you need crawl space insulation are drafts, high energy bills, and mold. Drafts can start in crawl spaces and cause hot or cold air to spread to the rest of your home through holes in the floors and walls. And even if your entire home is well-insulated, you can still feel an unchecked draft from your crawl space and in your utility bill. Uninsulated crawl spaces can let in air and moisture, and because they’re built directly on the ground and difficult to dry out, they are hotspots for mold and mildew.

Through R-value assessments based on climate and existing insulation.

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.

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.

The life span of insulation is between 20 and 100 years. At that time, existing insulation can fall victim to gravity, resulting in compression, which reduces its insulating protection or R-value. If you can't simply add more insulation over the existing material, removing the old to increase the effectiveness of the new can reduce your energy bills and make the project worth the time and money investment.

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