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>

Can I install a radiant barrier myself?

• <div><p>It is possible to install a radiant barrier yourself. However, knowing <a href="https://www.angi.com/articles/how-install-radiant-barrier.htm">how to install a radiant barrier</a> and actually doing it are two totally different things. For example, it’s important that they be installed in a straight line but at an angle that creates a gap between the roof panels and the foil or spray. If this gap is too large or small, it won’t function as it should, and that may be hard to avoid if you’re only a novice. When in doubt, leave this job to a pro.</p></div>

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*The Angi rating for Doorbell Installation companies in Sheffield, IL 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 11, 2025

Reviewed in March 2025
I am so beyond happy with the work Elite Seamless Gutters out of Spring Valley, IL did putting gutters on my house!! John is an absolute genius when it comes to knowing what your house needs. I have an old Victorian house and had new gutters put on twenty years ago but had so many downspouts and...
Elite Seamless Gutters, Inc.
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Reviewed in April 2023
Great guy, helped me pick out a system to fit our needs and installed it very fast. Great service at a reasonable price.
Guajardo's Home Solutions DBA Aqua Medic
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Reviewed in April 2023
Honestly found their ads on social media and see a billboard sign when I go to Wisconsin. So I reached out. They came and gave me an estimate for a new bath. The service was great. They removed all the reminders of my old bath and installed the new one with no mess. The work was so well done...
Mad City Windows & Baths
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Reviewed in March 2022
Its not the company's fault, it was the workers. The installation was perfect but missed something, the plug.
Triple Service Plumbing Heating & Air Conditioning
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Reviewed in March 2022
This garage door installer was on top of our job from beginning to end. They came out the same day to look at the job. Once the replacement door was received, they were on time to do the work. They worked through the installation in a timely manner. They were always polite and careful to...
Five Star Garage Doors
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Reviewed in December 2021
They sent multiple people to fix our air conditioning. After several times of not fixing anything, but charging me for it, he finally sent his son who changed the blower motor, which works until it doesnt. When it doesn't I have to go knock on it to get it going. They said they will send someone...
Eds Heating and Air Cond Plumbing Electrical Inc
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Reviewed in December 2020
Installation was excellent. But has been over4 weeks and still not functioning. Customer service is the worst. Say they will call and don't. Have spent hours going round and round with them. Waiting one more week and then will seek legal help.
POWERHOME Solar
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Reviewed in November 2019
Terry s crew was excellent. They were very courteous and answered all our questions. The quality of the cabinets and the entire installation is excellent. I was amazed at how efficiently they did the electrical and plumbing. Our new kitchen is beautiful. I give a high recommendation to Terry s...
Terry's Remodeling
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Reviewed in August 2019
OMG, WILL NEVER call another contractor for a bid in Window World's area of expertise! Last week, as I was coming home from vacation, in traffic near Chicago, I received a call wanting to schedule an install date. I agreed that the following Monday would be fine. Requested an expected arrival...
Window World Inc
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Reviewed in May 2019
Cherrytree Kitchens cabinets are excellent quality. The installers are professional and their work is impeccable. I highly recommend them.
Cherrytree Kitchens
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Doorbell Installation questions, answered by experts

Acoustic foam, fiberglass insulation, soundproof curtains, and specialized drywall are effective in reducing noise transmission.

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.

Each of the three types of wool insulation has particular disadvantages. While their R-value is higher, they all cost more than fiberglass versions. Installing mineral wool and sheep wool requires protective gear. Because of its vulnerability to insects, chemicals are used in its production. Hemp wool is more costly to install than other types because additional tools and labor are involved.

For standard 2x4 walls, the ideal insulation has an R-value between R-13 and R-15. This level of insulation, typically around 3.5 inches thick, fits well within the wall cavity. Common options include fiberglass batts and spray foam. The best choice for your home can depend on your climate; use R-value maps, like those from Energy Star, to determine the recommended level for your region. For colder climates, you might also consider adding exterior insulation for greater efficiency. Always check with your local building codes to ensure you meet any required standards.

It is possible to install a radiant barrier yourself. However, knowing how to install a radiant barrier and actually doing it are two totally different things. For example, it’s important that they be installed in a straight line but at an angle that creates a gap between the roof panels and the foil or spray. If this gap is too large or small, it won’t function as it should, and that may be hard to avoid if you’re only a novice. When in doubt, leave this job to a pro.

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