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>

What are the best ways to insulate an attic?

• <div><p>Blown-in insulation works, but only for unfinished attics. Also, it isn’t the longest-lasting nor the most effective option. For better options, look into <a href="https://www.angi.com/articles/diy-spray-foam-insulation-kits.htm">spray foam insulation</a> or natural fiber batts. They typically have a longer lifespan, better heat resistance, and stronger sound-proof abilities. Spray foam insulation costs about $1.25 to $1.50 per square foot, but can go up to more than $4 per square foot. Fiber batt pricing varies depending on the material.</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>

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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Last update on January 22, 2026

Reviewed in January 2026
I had the gas line repaired and replaced because of a leak. Hot water tank replaced and installed. I like that they do not work by the hour and that they just give you a job estimate and charge you that price no matter how long it takes. Professional, nice people.
Wright's Perfection Plumbing
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Reviewed in September 2024
This is the 2nd time buying with Rhodes windows. Both times have been a great experience. They have windows for all different applications, install team was great and efficient. Look forward to long service life for my windows!
M. Rhodes Company LLC
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Reviewed in October 2023
Top notch products, installation and customer service!
Weatherization Experts, Insulation
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Reviewed in March 2018
He installed some duct work in my attic, installed a bathroom fan/light and also on my air conditioning. Very prompt, I would recommend him to anyone!
D N D Air Solutions, LLC
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Reviewed in March 2018
These guys are very professional. They offer premium work on a professional level. Their communication was great and they were on time and I can't believe the work they performed. They widened two doorways, installed a vanity, and repaired my front door making it so much easier to get my...
The Flying Locksmiths
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Reviewed in May 2016
Jesus installed a cabinet, sink, faucet, and the back splash in our laundry room. He was prompt, courteous, and skilled. We will definitely use his service again.
Ruiz Custom Renovations, LLC
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Reviewed in September 2013
Near the installation date of new equipment, Contractor sent his wife to home to collect 50% of cost before commencing with job. I replied that I would pay as requested when I was provided a and quot;Certificate of Insuranceand quot; by contractor. As a former business owner of National...
Norton Heat & Air LLC
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Reviewed in September 2013
<blockquote> <blockquote> The following are items that the electrical contractor did not accomplish during the building of our house: <br /> · The contractor came out and did a thorough walk-through and was supplied with house plans in order to markup were the electrical devices...
PARRISH STATEWIDE ELECTRIC
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Reviewed in April 2012
Overall, it was one of the most positive experiences in the building process. Kyle was very informative and knowledgeable about their products and made some recommendations on the best systems for what we were looking for. <br /> <br /> Band L was very informative of what was going to...
B & L Heating & Air Conditioning Inc
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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.

Blown-in insulation works, but only for unfinished attics. Also, it isn’t the longest-lasting nor the most effective option. For better options, look into spray foam insulation or natural fiber batts. They typically have a longer lifespan, better heat resistance, and stronger sound-proof abilities. Spray foam insulation costs about $1.25 to $1.50 per square foot, but can go up to more than $4 per square foot. Fiber batt pricing varies depending on the material.

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.

The time required for insulation installation can range from a few hours to a few days, with most projects taking 1-3 days to complete. The final duration depends on the project's size and complexity, the area size, and the type of insulation being installed.

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.

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