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>

How do I add insulation to existing walls?

• <div><p>If you need to insulate behind finished walls, the best option will likely be to have an insulation professional install <a href="https://www.angi.com/articles/blown-in-insulation.htm">blown-in insulation</a>. The installation requires small holes cut in your wall, after which the installer can blow loose-fill insulation into the void. After the installation, you’ll have minor drywall patching, which shouldn’t cost more than <b>$100</b>. Compared to ripping down the existing drywall, using a different type of insulation, and replacing and finishing the drywall, this should save you hundreds or even thousands, depending on the size of the room you’re insulating.</p></div>

What is the downside of radiant barriers?

• <div><p>The primary downside of radiant barriers is their limited effectiveness in cold climates. They are designed to reflect radiant heat, making them less beneficial in cooler conditions where heat retention is more important. </p><p>Radiant barriers require proper installation to maximize effectiveness. Incorrect placement can lead to minimal benefits. They also do not provide insulation, meaning they should be used in conjunction with traditional insulation for optimal energy efficiency. </p></div>

Best doorbell installation pros near Chatham, VA

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*The Angi rating for Doorbell Installation companies in Chatham, VA 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 November 06, 2025

Reviewed in November 2025
From the very beginning, Upgrade Remodeling was incredible for their contacting me fast, having a Project Manager available all the time for questions, scheduling the actual work to be done, a contact between me and the installers...I recommend Upgrade Remodeling to everyone. And the walk-in...
Upgrade Remodeling LLC
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Reviewed in February 2025
They showed up on time and was very thorough on the inspection and quick with the new install
Wisler Plumbing, Heating, Cooling, & Electric
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Reviewed in January 2025
Workmanship is great! Installed paneling in water tank room and trimmed it out. Removed Sheetrock walls and ceiling in breakfast nook and installing tongue and groove panels.
J-Jays Home Improvement LLC
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Reviewed in September 2024
John Stone did the initial assessment and explained our options including financing. Alfonso Cobos and Mihail Gadjelor installed basement gutters and supports to stabilize our front porch. They were responsive and kept us informed of schedule adjustments. All JES employees were clearly...
JES Foundation Repair
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Reviewed in August 2024
The whole experience with west shore was a great experience, we noticed a gap in one of doors seals were leaking. They sent out 2 guys Adelaidm and micheal J out very nice in 20 minutes fixed the door and checked the other door they installed. There is a reason this company gets a 5 star...
West Shore Home Charlotte
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Reviewed in July 2023
The installers Steven Marshall and Dedie Devon was courteous and had a sense of urgency. They gave me an appointment and was here in a timely manner.
JES Foundation Repair
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Reviewed in March 2022
The owner responded to my call within a reasonable amount of time. Mr Ford has done a lot of work around my home from installing handrails in my bathroom doing my roof and all kinds of other jobs he even customized my workshop for me so I could do some of the things I used to before I became...
Alls Covered Roofing and Siding
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Reviewed in February 2021
The workers came out and installed the fence within the scheduled 3 days. I am pleased with the fence.
J & R Pro Fencing - Home Facebook
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Reviewed in October 2020
Roto-Rooter installed a new Hot Water Heater 50 feet inside the crawlspace under my house. They had to drain and remove the old tank, and replace it with the new one. The plumbers were fast, efficient. I was concerned that the replacement might inadvertently rip the newly-installed Vapor...
Roto-Rooter
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Reviewed in May 2020
We recently had an emergency situation; our hot water heater was leaking and our house is up for sale. Tyler came out within an hour, assessed the issue, gave us an estimate (and in fact, lowered it a bit) and by the end of the afternoon, we had a new heater installed! Great work, company and...
Liberty Pure Solutions, Inc.
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Top-Rated Doorbell installation pros in Chatham - Updated Nov 2026

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Doorbell Installation FAQs, answered by experts

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.

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

If you need to insulate behind finished walls, the best option will likely be to have an insulation professional install blown-in insulation. The installation requires small holes cut in your wall, after which the installer can blow loose-fill insulation into the void. After the installation, you’ll have minor drywall patching, which shouldn’t cost more than $100. Compared to ripping down the existing drywall, using a different type of insulation, and replacing and finishing the drywall, this should save you hundreds or even thousands, depending on the size of the room you’re insulating.

The primary downside of radiant barriers is their limited effectiveness in cold climates. They are designed to reflect radiant heat, making them less beneficial in cooler conditions where heat retention is more important.

Radiant barriers require proper installation to maximize effectiveness. Incorrect placement can lead to minimal benefits. They also do not provide insulation, meaning they should be used in conjunction with traditional insulation for optimal energy efficiency.

The best type of insulation for your home depends on your specific needs, climate, and the area you are insulating. For new construction, structural insulated panels are a highly energy-efficient option that is easy to install during the building process. In very warm climates, reflective insulation can be a cost-effective choice. For cold climates, fiberglass is an excellent option due to its high R-value and resistance to settling over time. Spray foam works well in humid environments because of its moisture-resistant properties. For standard attics, loose-fill, spray foam, or blown-in insulation are all suitable options.

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