What is the best type of attic insulation?

• <div><p>The best type of attic insulation depends on where you live, your budget, and what stage of construction the attic is in. For example, if you're building a house, then structural insulated panels are a worthy investment since they're easy to install during construction and they're the most energy-efficient type of insulation. </p><p>Additionally, if you live in a very warm climate, then you can potentially save quite a bit of money by opting for reflective insulation, which is more affordable than comprehensive insulation but doesn't work well for cool climates. Blown-in, loose-fill, and spray foam insulation are all great options for attics in moderate climates.</p></div>

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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Last update on October 17, 2025

Reviewed in October 2025
The wood used was a bad batch that began curling/warping shortly after installation. I was assured by William that the slats and gate would be replaced. There has been no communication for months. Thousands of dollars and not quite 2 years later, I'm left with an unsightly and poorly...
CU Midwest Designs, LLC
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Reviewed in August 2025
Ryan and his team installed a whole house generator for us as well several additional outlets in our home. Very timely and professional. Would recommend to anyone needing electrical service.
Apex Electrical Solutions
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Reviewed in June 2025
Great to work with and did a great job on the install and explaining how to care for the system. Would highly recommend.
Pure Water Solutions
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Reviewed in June 2025
Never higher Spence Fencing for a project. I hired Ronnie Spence to do a project for installing fence that I already had. His communication was atrocious as well as his ability to show up during agreed upon timelines. He only takes calls and texts that convenience him. He was supposed to show up...
Spence Fencing
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Reviewed in October 2024
Tyler and his entire team worked quickly and effectively to get our old, improperly installed metal roof removed and cleaned up and installed an entirely new shingle roof as well as all new sheeting to insure my roof was installed correctly and would last for numerous years to come. He and his...
Redemption Contractors LLC
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Reviewed in February 2020
We needed our furnace, water heater & ac unit replaced. Our furnace went out on a Thursday night, Friday morning we called Chief Bauer & Jeff came out a few hours later. (Which NEVER happens, we were expecting someone to come out the following week) Jeff was professional, friendly & very...
Chief/Bauer Service Experts
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Reviewed in May 2019
Very high quality and value. We lucked out selecting white pines. Eldon and installers performed very professionally during installation. All questions and issues were attend to total satisfaction. Communication remained excellent throughout entire order.
White Pines Wood Products
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Reviewed in October 2018
Installed bathroom fans and vented them to the outside. This is a project I have been wanting to do for several years. Finding someone to do this at a reasonable price was difficult until I called Eddie. I also had new lighting fixtures put in all of the bedroom closets. They also put lighting...
G & E Service
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Reviewed in August 2017
Free estimate and next day install.
A.G. Electric
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Reviewed in April 2013
I called to make an appointment to have roof looked at on Friday morning March 22, 2013. I was told a salesman would call after lunch. That Friday afternoon Larry Dillman called. I explained what was needed and what I was wanting. An appointment was made for Monday March 25th. at 9 AM. We...
Dillman Brothers Contracting Inc
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Top-Rated Doorbell installation pros in Tuscola - Updated Nov 2026

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Doorbell Installation FAQs, answered by experts

The best type of attic insulation depends on where you live, your budget, and what stage of construction the attic is in. For example, if you're building a house, then structural insulated panels are a worthy investment since they're easy to install during construction and they're the most energy-efficient type of insulation.

Additionally, if you live in a very warm climate, then you can potentially save quite a bit of money by opting for reflective insulation, which is more affordable than comprehensive insulation but doesn't work well for cool climates. Blown-in, loose-fill, and spray foam insulation are all great options for attics in moderate climates.

In addition to adding insulation to your attic, you may want to add a radiant barrier. A radiant barrier works by using reflective material, such as foil, on the attic floor. As heat penetrates the roof and enters the attic, the radiant barrier reflects the heat upward and back through the roof. If you receive a lot of direct sunlight on the roof, using both a radiant barrier and insulation in your attic can provide significant benefits.

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.

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.

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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