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>

Is bubble wrap or dish foam better?

• <div><p>Bubble wrap is better for moving since it can be cut to size, whereas dish foam comes in precut sheets that are harder to manipulate. However, if you’re packing items like dishes, wine glasses, picture frames, or mirrors, dish foam will protect them better. Ensure you measure your box beforehand so you know what size dish foam to purchase. </p></div>

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Verified Reviews for Doorbell Installation pros in Exeter, PA

*The Angi rating for Doorbell Installation companies in Exeter, PA 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 Exeter, PA 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 18, 2026

Reviewed in February 2026
Great service. Showed up quickly. Found the problem. Ordered the part and installed. Very polite and considerate
PT Mechanical, LLC
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Reviewed in July 2024
Well done job. The bathroom got done. A much needed upgrade. They installed a new shower door that turned out great! They also got rid of leaks I had in the bathroom.
Home B Jam Construction LLC
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Reviewed in July 2024
Very satisfied from sales call to install. This will save us money. The sales team was knowledgeable but never pushy and the install was easy and efficient.
Public Service Solar
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Reviewed in April 2024
was a split mini unit (3) ac install. were very professional and communicated well, kept me informed throughout the process. on completion, cleaned up leaving nothing for me to do. would definitely rehire. all and all experience was uneventful and pleasant.
Keystone Home & Lighting LLC
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Reviewed in December 2023
Khan Electrical installed 3 outlets and 3 switches for me in a professional and timely manner.
Khan Electrical
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Reviewed in September 2023
They did an amazing job installing 4 windows and we will recomend them to others
Green Eco Solutions
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Reviewed in October 2022
The installer was pretty quick, knowledgeable and took care of the property, everything was neat throughout the installation, great job
H Construction Company
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Reviewed in April 2022
Leonard is very nice and professional man. He installed 3 doors for me in a reasonable amount of time and for a reasonable fee. I was very happy with the finished product.
Leonard Trotta General Contractor
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Reviewed in April 2022
Mark called and came over to look at the job. He explained how difficult it would be to install fencing around my back porch. This was an add on porch from years back and he had to crawl under it to add Wood to attach the fence. Mark gave me a great price. Since it was Easter weekend he came...
Mark McDermott Construction
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Reviewed in March 2022
They came out to install an outlet for our new electric car, so timing was everything. He came out, figured out what needed to be done, ran out for what he needed and installed the same day. Cameron was very personable and knowledgeable - he did a fantastic job and I'd have him back for any...
Thomas Edison Electric Inc
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Doorbell Installation questions, answered by experts

Monolithic slabs don’t require insulation, but many homeowners choose to have their contractors install insulation under the slab during construction. This can help improve home efficiency even more and keep indoor temperatures more stable. Slab foundations are more energy-efficient than uninsulated crawl spaces and basements, and insulated slab foundations are more energy-efficient than insulated crawl spaces and basements.

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.

The cost to install a radiant barrier ranges from $700 to $2,800, depending on the size of your roof and the type you choose. Most people pay an average of $1,700 to install a radiant barrier. Foil options, both single- and double-sided, cost between $0.10 and $0.90 per square foot, while spray-on options start at $0.60 and go all the way up to $1 per square foot—which can add up quickly.

Bubble wrap is better for moving since it can be cut to size, whereas dish foam comes in precut sheets that are harder to manipulate. However, if you’re packing items like dishes, wine glasses, picture frames, or mirrors, dish foam will protect them better. Ensure you measure your box beforehand so you know what size dish foam to purchase.

Ductwork should be wrapped in insulation in certain locations. This includes unconditioned interior parts of the home, such as attics, crawl spaces, basement ceilings, and between floors. Duct joints should also be insulated since they're more likely to leak air than other parts of your system. Building codes in some areas also require ductwork to be insulated.

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