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>

Does bathroom insulation need a vapor barrier?

• <div><p>Yes. Bathroom insulation requires a vapor barrier. As a matter of fact, bathrooms and kitchens are the two areas of the home that should always get a vapor barrier because of the excess moisture. If you don’t have a vapor barrier in place in these rooms, the moisture will build up and eventually lead to mold and bacteria, not to mention the destruction of the insulation.</p></div>

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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: Can I install insulation behind drywall myself?

• <div><p>Yes, you can <a href="https://www.angi.com/articles/how-to-install-insulation.htm">install insulation</a> behind drywall yourself, but only if your walls are not finished. If your studs are exposed, installing fiberglass insulation in roll or batt form is very straightforward and just requires a few tools and some safety equipment. If your walls are already finished and you&rsquo;re looking to add insulation, it&rsquo;s better to hire a professional, as you&rsquo;ll likely need blown-in insulation, which can be dangerous to work with and a challenge to get into the proper areas in your wall voids.</p></div>

Q: What happens if you don't install a vapor barrier?

• <div><p>While not every wall requires a vapor barrier, if you do need one and don&rsquo;t install it, moisture can get between the walls of your home. This can lead to water damage from mold growth or rot, and the excess moisture could also attract pests, including termites, cockroaches, or ants.</p></div>

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Verified Reviews for Doorbell Installation pros in Fairfield, MT

*The Angi rating for Doorbell Installation companies in Fairfield, MT 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 Fairfield, MT 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 June 30, 2026

Reviewed in June 2026
Excellent service, Brian and his crew were safe, meticulous, and deeply invested in completing tasks carefully and efficiently.
Circle B Saw and Tree
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Reviewed in January 2025
I recently contacted Valler Services for a septic tank replacement, and I couldn't be more pleased with the service I received. From start to finish, their team was professional, knowledgeable, and attentive to my needs. The communication was excellent; they kept me informed at every stage of...
Valler services GC
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Reviewed in October 2023
Kai rescued us from another contractor who strung us along and did nothing for 3 months. He swooped in and got everything done in record time. He was all business and knew how to coordinate with sub-contractors to get the work done. He was very professional and patient with us as we negotiated...
First Finishers, LLC
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Reviewed in August 2021
Nathan showed up on time and did a great job. He replaced our carpet with beautiful wood laminate flooring
Freedom Flooring
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Reviewed in July 2021
Great customer service and easy to work with.
Jones Excavation, LLC
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Reviewed in December 2020
Billy is great about listening to your ideas. Getting a feel for your vision then offering suggestions on how to make it work with materials you have. Spends time on little details that add so much character to project. Just a nice guy to work with.
Billy Widmer
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Reviewed in October 2020
Amazing. We love our windows. Makes such a huge difference in our Upstairs. And the installation team was professional, polite, and efficient.
Renewal by Andersen of Montana
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Reviewed in November 2019
He was prompt and efficient, very dedicated to his work, and he takes pride in his work! He did a nice job!
Big Montana Brush Works
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Reviewed in August 2019
Went the extra mile in terms of advice and number of trips during commute traffic.
Beastbay Plumbing
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Reviewed in May 2019
Prompt, work fast, and do a good job.
Moenbros
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Doorbell Installation questions, answered by experts

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.

Yes. Bathroom insulation requires a vapor barrier. As a matter of fact, bathrooms and kitchens are the two areas of the home that should always get a vapor barrier because of the excess moisture. If you don’t have a vapor barrier in place in these rooms, the moisture will build up and eventually lead to mold and bacteria, not to mention the destruction of the insulation.

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

Yes, you can install insulation behind drywall yourself, but only if your walls are not finished. If your studs are exposed, installing fiberglass insulation in roll or batt form is very straightforward and just requires a few tools and some safety equipment. If your walls are already finished and you’re looking to add insulation, it’s better to hire a professional, as you’ll likely need blown-in insulation, which can be dangerous to work with and a challenge to get into the proper areas in your wall voids.

While not every wall requires a vapor barrier, if you do need one and don’t install it, moisture can get between the walls of your home. This can lead to water damage from mold growth or rot, and the excess moisture could also attract pests, including termites, cockroaches, or ants.

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