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>

Is a radiant barrier better than insulation?

• <div><p>Radiant barriers and insulation serve different purposes, so one is not inherently better than the other. Radiant barriers reflect radiant heat, helping keep spaces cool, especially in hot climates, while insulation slows heat transfer through conduction. For optimal energy efficiency, it’s best to use both together. </p><p>Radiant barriers can enhance the performance of insulation by preventing heat gain in the summer and heat loss in the winter. The choice between them depends on specific climate conditions and the building’s design requirements.</p></div>

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*The Angi rating for Doorbell Installation companies in Laurel Fork, 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 March 05, 2026

Reviewed in March 2026
Tommy arrived on time and did a great job installing a new dishwasher under a custom-made cabinet that had housed the old dishwasher for 16 years. Even though both dishwashers were standard size, there were some challenges with the new unit due to the customization of the previous installation....
Mega Plumbing Corp.
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Reviewed in January 2026
Upon discovering that when our now four-year-old home was built, the support beams in our crawlspace had not been properly installed, nor had adequate ventilation been provided resulting in the stability of our home being in jeopardy. We began a search for a reputable company to address our...
JES Foundation Repair
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Reviewed in November 2024
My family has a second home (for retirement) on 50 wooded acres in Virginia, where wildlife control is a very important issue. Since this house is unoccupied (by humans) for about 6 months out of the year, confidence that our home is free of undesirable wildlife is a priority for us. We...
Billy's Wildlife Control LLC
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Reviewed in March 2022
We hired BTR Heating and Air Conditioning Co to replace an old unit. The price was extremely reasonable. In fact, a good bit lower than a couple estimates I had received beforehand. And the installation was does quickly and professionally. I was so impressed that I plan to have them do the...
BTR Heating & Air
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Reviewed in September 2021
NOT TO BE TRUSTED and if you do, make sure you check not only their work but also what you already had. We hired him to install the seemless gutters. The product is good and they were quick to finish the job. We checked the gutters and paid them, as they were leaving, we had to call them...
Rock Solid Seamless Gutters
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Reviewed in November 2020
The installers were professional and friendly. We are very satisfied with the quality of their work.
West Shore Home Winston-Salem
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Reviewed in April 2020
Great experience from from our first meeting with James to quote the generator sale/installation until the date of completion. Neil and Chandler were professional, helpful and friendly throughout the installation process. Would recommend their service to all!
Blue Ridge Heating & Air
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Reviewed in March 2020
Good people to work with, professional in every way. Normally when we received 2" of rain water would start entering the basement. When we receive 3" the basement floor would be covered. Two days after installing their system our area received 8.5" of rain and our basement remained...
Fortress Foundation Solutions
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Reviewed in February 2020
Techs lost two hours because they did not have what they needed to do the job, and had to go back to their shop. Techs left the house when they finished installing, without verifying that the system was working inside. Consequently, it was not. I called office after hours to report. Customer...
JD Service Now - Plumbing
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Reviewed in January 2018
Joe was very knowledgeable and gave me a good and reasonable estimate. The installation was very smooth and final product looks amazing. I will recommend them anytime. They installed a vinyl ceiling in the outdoor porch. Anthony
Contract Exteriors, LLC
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Doorbell Installation questions, 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.

Radiant barriers and insulation serve different purposes, so one is not inherently better than the other. Radiant barriers reflect radiant heat, helping keep spaces cool, especially in hot climates, while insulation slows heat transfer through conduction. For optimal energy efficiency, it’s best to use both together.

Radiant barriers can enhance the performance of insulation by preventing heat gain in the summer and heat loss in the winter. The choice between them depends on specific climate conditions and the building’s design requirements.

Yes, cold walls are a common indicator of poor or inadequate insulation, especially if the walls feel significantly colder than the air in the room. This suggests that heat from your furnace is escaping rather than being retained. The issue could be that the walls have no insulation, or that the existing insulation is old or has been damaged by water, moisture, or pests. Your best course of action is to hire a professional to investigate. An insulation contractor can determine if you need to add or replace insulation and can often perform the work without creating large holes in your drywall. If you suspect the problem might also be related to your heating system's performance, an HVAC technician can take a closer look.

Yes, you can use too much bubble wrap. If you overdo it with the wrapping, it can strain the top of your box and break open the taped seal, risking the chance that the contents of the box could fall out or break. Use enough wrapping to fully cover your item without compromising the security of your box.

The most affordable way to insulate behind unfinished walls is to install fiberglass batts or rolls. These total around $0.75 per linear foot, with the width matching the gaps between standard studs perfectly. However, it’s important to consider the R-value of your insulation and the climate in your area, as fiberglass insulation isn’t the best in terms of preventing heat transfer. Plus, the most affordable option may cost more on electricity bills over time. The most affordable way to insulate behind finished walls is to leave them up and use blown-in insulation to avoid drywall replacement.

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