Should you remove old insulation before adding new insulation?

• <div><p>You do not always need to remove old insulation before adding new. If the existing insulation is in good condition—not wet, physically damaged, moldy, or infested with pests—you can add new insulation directly on top of it for a compounding effect. You can also mix different types, such as adding blown-in insulation around existing fiberglass batts.</p><p>However, removal is recommended if the old insulation is compromised by water damage or pests. You should also remove it if you plan to install a different type of insulation, like switching from roll or batt insulation to spray foam. If the existing insulation is very old or damaged, you will likely get more benefit from removing it and starting fresh.</p></div>

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Q: What is the best insulation for HVAC ducting?

• <div><p>Fiberglass is the best insulation for HVAC ducting because it's inexpensive, widely available, versatile, and long-lasting. Fiberglass also offers acoustic insulation in addition to thermal insulation, which can contribute to a more peaceful home environment. You can use other materials like mineral wool, but fiberglass is the industry standard. </p></div>

Q: Does a monolithic slab need insulation?

• <div><p>Monolithic slabs don&rsquo;t require insulation, but many homeowners choose to have their contractors install insulation under the slab during construction. This can help improve home efficiency even more and keep indoor temperatures more stable. Slab foundations are more energy-efficient than uninsulated crawl spaces and basements, and insulated slab foundations are more energy-efficient than insulated crawl spaces and basements.</p></div>

Q: How do pros determine the right type and amount of insulation for my attic?

• <div><p>Through R-value assessments based on climate and existing insulation.</p></div>

Q: How do area size, material thickness, and preparation requirements impact installation expenses?

• <div><p>Costs depend on area size, material thickness, and site preparation needs.</p></div>

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Verified Reviews for Doorbell Installation pros in Bridger, MT

*The Angi rating for Doorbell Installation companies in Bridger, 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 Bridger, 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 November 10, 2025

Reviewed in November 2025
I had 7 huge trees removed, and 5 large bushes. They came right away to take a look at the job, and give a bid, then returned within a couple weeks to get it done. His clean up of the property was WONDERFUL! Very professional, and very kind!
Diamond K Tree & Landscape LLC
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Reviewed in April 2023
Very good service at reasonable prices
VanBrokenBurgh Recycling and Appliance
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Reviewed in March 2023
Best customer service! I called Paul to repair our Monogram refrigerator because it stopped working. Paul was very knowledgeable, and he was able to identify the problem quickly. He ordered a new part and in few days he came back to installed it. The refrigerator works perfectly and we are very...
Big Horn Appliance Repair and Maintenance
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Reviewed in July 2022
I cannot answer these questions because the work has not yet been done! You should check with your contractor on their status, BEFORE you. send out a Review request. It makes sense that you would do so, and by not doing that you have let me down. I cannot rate them until they have at least...
Indoor Air Solutions, LLC
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Reviewed in August 2021
I was happy with it!
Westside Paint & Drywall
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Reviewed in March 2021
Very knowledgeable of his trade. Very personable customer service. He completed the job timely and efficiently and educated on the cause of the electrical defect he fixed. His fair/advantageous cost along with his friendly and kind service was a welcomed relief when hiring for a repair and...
Diaz Electric
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Reviewed in October 2020
If you are looking for this kind of help they are the ones to hire! Professional, listened to my needs and desires and delivered on all expectations! Matter fact they exceeded my expectations.
Junk Nation, LLC
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Reviewed in December 2019
They arrived on time. Very courteous and professional. Pricing and quality of work better than I expected.
Glass Depot
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Reviewed in May 2015
Although we had to wait 6 months for installation we are extremely pleased with Lynnrich's quality and the professionalism of their employees. We would recommend them to anyone!
Lynnrich Seamless Siding Windows & Doors
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Doorbell Installation questions, answered by experts

Fiberglass is the best insulation for HVAC ducting because it's inexpensive, widely available, versatile, and long-lasting. Fiberglass also offers acoustic insulation in addition to thermal insulation, which can contribute to a more peaceful home environment. You can use other materials like mineral wool, but fiberglass is the industry standard.

You do not always need to remove old insulation before adding new. If the existing insulation is in good condition—not wet, physically damaged, moldy, or infested with pests—you can add new insulation directly on top of it for a compounding effect. You can also mix different types, such as adding blown-in insulation around existing fiberglass batts.

However, removal is recommended if the old insulation is compromised by water damage or pests. You should also remove it if you plan to install a different type of insulation, like switching from roll or batt insulation to spray foam. If the existing insulation is very old or damaged, you will likely get more benefit from removing it and starting fresh.

Monolithic slabs don’t require insulation, but many homeowners choose to have their contractors install insulation under the slab during construction. This can help improve home efficiency even more and keep indoor temperatures more stable. Slab foundations are more energy-efficient than uninsulated crawl spaces and basements, and insulated slab foundations are more energy-efficient than insulated crawl spaces and basements.

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

Costs depend on area size, material thickness, and site preparation needs.

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