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>

Does the paper on insulation go in or out?

• <div><p>If you’re using faced insulation with paper, face the paper toward the inside of the room during the installation process. </p><p>A good way to remember this is that the paper should face the “warm side” as it’s the vapor barrier, meaning it should face toward where the heat will be coming from.</p></div>

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*The Angi rating for Doorbell Installation companies in Kamas, UT 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 August 04, 2026

Reviewed in August 2026
We had Chris from S.O.S Heating and Cooling come out this a.m to install a Toto toilet seat. Chris showed up exactly on the time scheduled and completed the installation in under an hour. He was completely professional and knowledgeable as well as efficient in handling this job. We were Very...
S.O.S Heating & Cooling, LLC
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Reviewed in November 2025
David was very professional and efficient. His initial service call was applied to the overall cost of any part and installation. I would highly recommend David and his company.
Western Appliance Solution
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Reviewed in March 2025
Matt Price did a courteous and very professional job installing our new 65 inch TV above the mantelpiece.He also gave us valuable information concerning the features of the TV and got it set up.He described the services of his company should we need further assistance in connecting other devices...
Proto Audio & Video Installations
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Reviewed in January 2025
Tyler did a great job digging a new home foundation and installing all the utilities. Great to work with and will hire again!
Waters Excavating, LLC
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Reviewed in January 2025
Great service, the instalation was quick and had no problems. Would recommend.
Broccato Wallpaper
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Reviewed in October 2024
If you are in need of an irrigation system install, repair, activation or winterization then look no farther. Mountain Land Sprinklers, LLC is who you want to hire. The owners, Hayden and Caleb are two of the most pleasurable individuals to work with. I found them not only to be extremely...
Mountain Land Sprinklers LLC
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Reviewed in February 2024
Greg did our entire remodel with the exception of countertop install. We were very close to his original bid, but finished only a couple of weeks after our deadline which is probably reasonable for a 3 month project. Very great communication and easy to reach. Thought of many things and had...
Wise Electric, LLC
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Reviewed in December 2023
I received a personal referral from friends on Facebook when I asked about needing all new windows. Rhino was rhe most responsive of all vendors I got quotes from. They have great customer service and their installers went above and beyond. We had a custom bay window made and it required special...
Rhino Windows
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Reviewed in September 2023
Great help! He helped me to install all of my appliances into my apartment. He responded quickly and has helped maintain my washer and dryer as well. I would highly recommend!
DO Handyman
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Reviewed in July 2023
Window tinting. Quick response to inquiry and very easy to work with. Quoted project on the spot and was able to schedule install right away. Showed up on time, got the job done and cleaned up afterward.
Envision Tinting, Inc.
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Doorbell Installation questions, answered by experts

They recommend sustainable materials and water-saving fixtures, tailoring choices to balance sustainability and style.

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.

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.

If you’re using faced insulation with paper, face the paper toward the inside of the room during the installation process.

A good way to remember this is that the paper should face the “warm side” as it’s the vapor barrier, meaning it should face toward where the heat will be coming from.

Mineral wool has an excellent life expectancy of up to 50 years, provided it's kept dry and free of pests. Compared to fiberglass, with a life span of 20 to 30 years, mineral wool stacks up well for long-term cost savings. Sheep wool maintains a similar life span to fiberglass, while estimates for hemp wool insulation life expectancies are all over the board, ranging anywhere from 20 to 100 years.

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