• 1140 South 1900 East, Unit #2 Washington, UT 84780
  • |Contact Us
Big City
Insulation
Call Your Local Pros Today! 435-215-4127

Adding New Insulation Over Old Layers

When you need to insulate your home, you turn to professionals. After all, insulation installation is not an ideal project for DIYers, no matter how savvy. So many questions and factors come into play, such as should you remove insulation or is it fine to just add layers over existing insulation?

Contact us to start your project, or keep reading to learn more about adding insulation to your home!

Can I Add New Insulation Over Existing Layers?

According to ENERGY STAR®, you can put new insulation over old insulation, “unless it is wet. If it is wet or appears that the insulation has previously been wet, you should look for the cause and repair the problem…” Wet insulation is problematic, as it can lead to mold, mildew and sometimes the rotting of ceilings or roof rafters.

Although insulation professionals will handle the installation for you, here are some things to keep in mind about removing old insulation and installing new insulation over old insulation, according to ENERGY STAR:

  • “Faced” insulation should not be placed on top of existing insulation in the attic. Any new batt or roll insulation installed over existing insulation in the attic needs to be without a vapor retarder (face). The vapor retarder on top of or between layers of insulation can trap moisture. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.
  • Batt or rolled insulation or blown loose-fill insulation (fiberglass or cellulose) can be installed on top of old insulation.
  • Insulation should be rolled out perpendicular to the joists—and unfaced rolls should be used.
  • Rolled insulation should not be tacked down. The R-value can be reduced if the insulation is squashed or flattened.
  • Any vermiculite insulation found in your attic should be tested. If the test reveals that asbestos is present, the vermiculite should be removed by a certified professional before installing more insulation.
  • It’s recommended to air seal before installing insulation since air leaks can hinder the performance of insulation and significantly reduce the energy efficiency and comfort of your home.

The most important thing to keep in mind is that you don’t have to worry about all this. Professionals will be able to answer any questions you have—and handle your entire home insulation project.

If you live in the Washington or St. George, Utah area, Big City Insulation can help. We have experience installing all types of insulation and can help you with your project. Contact us today to learn more about our services or if you’re ready for a quote!

TESTIMONIALS

"We have depended on BDI for over seven years and have been impressed by their workmanship, prompt response to requests, competitive pricing and innovation. We..

Residential Builder
Services We Provide
SEE MORE +
Residential Insulation

Our insulation team adds energy efficiency, comfort and value to new and existing homes.

SEE MORE +
Commercial Insulation

Big City Insulation is a leading installer of commercial fiberglass, rigid board and rockwool insulation.

SEE MORE +
Insulation Removal

Big City Insulation provides home insulation removal services.

SEE MORE +
Garage Doors

We offer comprehensive residential garage door services, including new installation and replacement.

Are You Sure?
Stay on Page
You are about to leave this Big City Insulation and enter a third-party site. Big City Insulation and Installed Building Products have no control over, and accept no liability, obligation, or responsibility for, the contents or performance of other websites. Any such link does not constitute an endorsement or any representation regarding, the linked website, its content, its owner, its performance, its owner’s products or services, or any forward-looking statements found in.
Leave Page
Stay on Page