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>

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Q: What maintenance is needed after installing insulation?

• <div><p>Minimal maintenance is required, though regular inspections to ensure insulation hasn't shifted or deteriorated can improve performance over time.</p></div>

Q: What is the lifespan of crawl space insulation?

• <div><p>The lifespan of crawl space insulation depends on how well you maintain your insulation and the type of insulation. Fiberglass will need replacing every 15 to 20 years on average if you don't have a vapor barrier in place. If you do have vapor barriers in place, then your insulation could last much longer. Spray foam insulation can last anywhere from 80 to 100 years. </p></div>

Q: How long does open-cell foam last?

• <div><p>Open-cell foam insulation has a life span ranging between 15 to 25 years when well cared for. However, the material may degrade sooner in areas with high humidity or after prolonged water exposure. Proper installation and maintenance can maximize its longevity but requires close monitoring. Closed-cell foam insulation has a longer life span of 30 to 50 years.</p></div>

Q: Is doubling up insulation a good idea?

• <div><p>Doubling the insulation in your home also doubles the R-value of said insulation. In other words, by adding more insulation, you can reduce the heat loss by half. Most homes benefit from increasing insulation. Older homes, in particular tend to have less insulation as is, so doubling your insulation could drastically reduce your energy bills, keep your home more comfortable, and take the strain off your HVAC system.</p></div>

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Verified Reviews for Doorbell Installation pros in Belle, MO

*The Angi rating for Doorbell Installation companies in Belle, MO 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 Belle, MO 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 February 14, 2026

Reviewed in February 2026
Good company to work with. We needed a fenced in area for our dogs like yesterday and they got it completed within a months time frame of requesting bids on Angie. Very respectful people to work with should I need any other work within their abilities I will definitely give them a call.
Collective Enterprise
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Reviewed in January 2024
Very knowledgeable about the entire process. I would highly recommend them to everyone. They preformed there test and then scheduled a time for the removal process. They were very informative along the way. A+++++ all the way.
Moldman Central MO
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Reviewed in September 2022
Great owner, great to work with
Newts Service and Metal Repair
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Reviewed in August 2021
I was having a issue with drainage in my back yard , they came in to install a French drain system, after they had done the job it looked like they were never there.
TNT Underground Construction
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Reviewed in January 2021
Rodney installed a Sure Call cell phone booster for us. We will hire him again when needed. Thank you Rodney Burl and Ruth Cummins, Bland, Mo
Cooper's Handyman Services, LLC
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Reviewed in June 2018
Jeff and his guys were great! We had to have quite a bit of maintenance on our existing pond, such as cleaning and re-stacking some of the edges. They also installed a new filtration unit in our waterfall which required a LOT of jackhammering through solid bedrock. Jeff and his crew worked...
Missouri Pond Company
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Reviewed in January 2016
They did everything they said they would do. The sales guy was great. The installer was very efficient. We are very pleased with the polymer! <br />
Continental Siding Supply
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Reviewed in December 2015
The installer is so very good! It took his crew 2 days to install 14 windows in a very difficult home (built in the mid 60's). They worked late into the night each day. I have been asked by at least 6 other home owners (who did your installation -- they are so quick)! I am totally...
Continental Siding Supply, Inc.
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Reviewed in February 2015
Ken performed the estimate and he installed the water heater.
Garner Refrigeration and Heating Inc
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Reviewed in March 2012
He was there on time and ready to work. He was professional and careful. He was finished when he said he would be and cleaned up everything when he was finished. <br /> The carpet still looks great today and we haven't had any problems with it at all. His installation when smoothly and we would...
Reed Floor Covering
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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.

Minimal maintenance is required, though regular inspections to ensure insulation hasn't shifted or deteriorated can improve performance over time.

The lifespan of crawl space insulation depends on how well you maintain your insulation and the type of insulation. Fiberglass will need replacing every 15 to 20 years on average if you don't have a vapor barrier in place. If you do have vapor barriers in place, then your insulation could last much longer. Spray foam insulation can last anywhere from 80 to 100 years.

Open-cell foam insulation has a life span ranging between 15 to 25 years when well cared for. However, the material may degrade sooner in areas with high humidity or after prolonged water exposure. Proper installation and maintenance can maximize its longevity but requires close monitoring. Closed-cell foam insulation has a longer life span of 30 to 50 years.

Doubling the insulation in your home also doubles the R-value of said insulation. In other words, by adding more insulation, you can reduce the heat loss by half. Most homes benefit from increasing insulation. Older homes, in particular tend to have less insulation as is, so doubling your insulation could drastically reduce your energy bills, keep your home more comfortable, and take the strain off your HVAC system.

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