denim insulation for soundproofing

Have you ever noticed how quiet a closet wall is compared to other interior walls? Stand inside a walk-in closet, and noise is almost nonexistent. The same factors that make a closet quieter are also what makes denim insulation soundproofing a good choice.

Is denim insulation good for soundproofing? Denim insulation is an eco-friendly non-carcinogenic recycled material. It has a multi-dimensional microstructure that isolates and traps sound waves to control noise. With an STC of 52 and an NRC of 1.15, it can provide superior sound suppression in Renos or new builds.

In this article, we’ll explain what denim insulation is and how it works to improve sound control. We’ll look at how to install it for sound suppression. Explore the pros and cons and how it compares to fiberglass insulation. Plus, take a look at several of the denim insulation products on the market. When you’re finished, you’ll have a better understanding of how denim insulation works and why it is an excellent option for your soundproofing projects.

What is Denim Insulation?

Denim insulation was developed in the early 1980s. It is manufactured from denim and cotton post-consumer recycled products that retailers, second-hand stores, and people no longer want. It also includes cut-offs and castoffs from mills and manufacturers, plus industrial cotton scraps. The insulation includes post-industrial cotton and denim, including blue jeans.

Insulation made from blue jeans and cotton is collected from a variety of sources. The zippers, buttons, bling, and other things that aren’t cotton are removed. The material then goes through large shredders that reduce it to small pieces. It then goes through another processor that separates the material into fibers.

The resulting blue cotton candy looking material is blended with 15% to 20% new fiber. The mixture is then treated with boric acid to make it resistant to flame, rodents, insects, fungi, and mildew. The final process involves heating the cotton fluff and pressing it into rolls of set thicknesses for packaging and shipping.

Denim Insulation Pros and Cons

Denim insulation has been available since the early 1980s. It is a GREEN eco-friendly, non- carcinogenic alternative for thermal and sound control applications. Denim is low density and decreases thermal conductivity, so less movement of heat or cold. That means it is good for home and sound insulation and why it is LEED-certified.

Denim has a multi-dimensional micro-structure. It controls sound by isolating and trapping sound waves. The insulation is 80 to 85% recycled content. It can even be recycled after a lifetime insulating a structure, keeping cotton waste out of landfills forever. It is also environmentally safe and uses less energy to produce than most other insulations too. Batts are compression fit and available in R-13, R-19, R21, and R-30.


  • Acoustic ratings are 10 to 30% better than fiberglass
  • Slightly better R-ratings than fiberglass
  • No VOC off-gassing or formaldehyde
  • Doesn’t cause skin irritation or itching
  • Improved air quality and fewer triggers for asthma or allergies
  • Resists mildew, fungi, bacteria, and mold
  • Lower energy consumption
  • Class A fire rating


  • Expensive and not available everywhere
  • Very heavy if it gets wet
  • Takes longer to rebound from packaging compression
  • May need to be trimmed to standard framing cavities

Denim Insulation Soundproofing Properties

The porous, multi-dimensional natural fibers of blue jeans insulation make for excellent sound absorbency. The porosity and density of the insulation, coupled with the fiber shape, contribute to denim’s superior STC rating of 52, and NRC value of 1.15. There is more surface area within the material to interrupt and transform sound energy into heat.

Denim sound insulation cuts sound transmission through walls, floors, and ceilings. It can also be used in acoustic traps, panels, and to wrap plumbing, duct, and HVAC pipes. The cotton material is easy to work with, has no VOC off-gassing, or irritating carcinogenic filaments.

Is Denim Insulation Good for Soundproofing?

Insulation made from blue jeans and other cotton products is good for soundproofing. The fibers are multi-dimensional, porous, and dense. The manufacturing process also ensures there are voids within the compressed panels. The fiber and insulation structure work together to improve soundproofing.

Soundwave frequencies penetrate the insulation and bounce off the different facets of the fiber, or are caught in the pores. Those that are deflected get trapped in voids or pores, which convert the frequency energy into heat. The heat quietly dissipates. Denim insulation has an NRC average of 1.15 and an STC value of 52, making it ideal for soundproofing applications.

How to Install Denim Insulation

Denim insulation soundproofing installs the same way stone wool and fiberglass insulation do, through compression fit. The cotton insulation comes in compressed rolls or batts. The compressed material needs time to rebound to its original thickness. It’s best just to remove the insulation from the packaging and give it a shake. It should then sit for a bit to reach its full loft. It will take longer at higher humidity.

The rolls of insulation are perforated, so they separate into standard 48” tall framing widths. They friction fit into 16” and 24” on-center wall, ceiling, or floor cavities. For weird-shaped spaces or cavities, the perforations may work, or cut the cotton mat with a utility knife. If a vapor barrier is required, a semi-impermeable plastic sheet is recommended by the manufacturer.

Denim vs Fiberglass Insulation for Sound Absorption

Sound absorption is influenced by many factors including, density, porosity, and thickness. Wall construction and workmanship are also essential considerations when soundproofing. Using batt insulation, rigid panel, or blown-in will also influence absorption. The insulation can be used in walls, ceilings or floors, or in acoustic traps to control sound.

Higher density materials usually have more fibers, so they will have more area to interfere with and absorb sound waves. A higher density is also important in controlling low-frequency soundwaves. The greater the density, coupled with higher porosity, usually means more sound absorption.

The porosity refers to the voids within a material. Greater porosity means insulation will be able to trap more sound. The trapped sound energy is converted to heat energy, which then silently disperses.

Fiberglass insulation is manufactured from synthetic fiber with a uniform, smooth cylindrical shape. Blue jeans insulation (cotton) is a natural fiber with a porous multi-dimensional profile so that it will absorb more sound.

The thickness of insulation often influences the frequency range that material will interrupt. However, greater thickness doesn’t mean a proportional increase in sound absorbency. It should be noted, though, that thicker multi-dimensional fibers will absorb more low-frequency noise.

Denim vs. Fiberglass Insulation for Sound Absorption
Comparisons Denim Fiberglass
NRC 3-1/2” thick 1.15 0.90 to 0.95
6” thick 1.15 1.05
STC 3-1/2” thick 52 46
6” thick 53 49
Thermal Rating 3-1/2” thick R-13 R-10.9
6” thick R-21 R-18.8
Density 3 lbs and 6 lbs/cubic foot 1.5 lbs and 3 lbs/cubic foot
Fire Rating Class A Class A

Recommended Products

Several different companies manufacture denim insulation. It is a renewable, natural material with excellent properties for controlling sound transmission. UltraTouch™ denim insulation by Bonded Logic is the result of 35 years of industry expertise. Frost King has been manufacturing and supplying solutions to keep the weather out for almost 100 years. Here’s a product from each:

UltraTouch Denim Insulation

Ultratouch™ denim insulation is made of denim and cotton material. It is 80% post-consumer material, and 20% pre-consumer cut-offs, making it 100% recycled content. The insulation is available in widths of 15”, 16.25”, 23”, and 24.25” to compression fit between the studs. Battens come in both 48” and 96” lengths. The thicknesses and thermal rates are 2” = R-8, 3.5” = R-13, 5.5” = R-19 or R-21, and 8” = R-30.

The batts are perforated but can be cut or pulled apart to fit as required. The cotton is treated with boric acid and is fire, mold, mildew, rodent, and insect resistant. The eco-friendly insulation doesn’t off-gas or have airborne particles to irritate the eyes and skin. The UltraTouch™ manufacturing process creates a three-dimensional product that isolates, traps, and controls sound frequency waves.

The cotton insulation can be used in wall, ceiling, and floor cavities to stop sound transfer. It will minimize echo, vibration, and flanking through ductwork and pipes. The denim insulation can also be used inside automobile panels to control noise or acoustic panels in homes or businesses. The versatile product has both thermal and acoustic benefits.

Frost King CF1 “No Itch” Multi-Purpose Insulation

Frost King’s multi-purpose 1” thick cotton fabric insulation has a thermal rating of R-4 rating. It is made of 100% recycled content. The material is treated with boric acid to make it fire, insect, rodent, mold, and mildew resistant. It can be cut or torn to fit where needed.

The insulation is sustainable, has no VOC off-gassing, and is child and pet-friendly. There are no irritating or carcinogenic fibers floating around either. Goggles, a mask, and gloves aren’t required, but safety is a good practice. The recycled denim damps noise, reduces vibration, cushions, and insulates.

The 1”x16”x48” sheets will fit between studs to absorb soundwaves. It can be used inside ducts or wrapped around ducts to mute echo and noise transfer. The recycled jeans insulation will work inside acoustic panels, bass traps, and conditioners to improve sound control too. It is also safe for use to insulate or cushion pet houses, boxes, or cages.


Using denim insulation soundproofing is an environmentally friendly alternative to fiberglass. The multi-dimensional structure of cotton, porosity, and denser material deliver better NRC and STC values. It also provides higher thermal ratings too. The natural material improves sound control and provides health benefits synthetic insulations don’t.

Hopefully, you have a better understanding of denim insulation – what it is, how it works, and why it’s a viable alternative for your soundproofing projects. If you found this article interesting and helpful, pass it on to someone who may also benefit. Your comments and suggestions are always appreciated.


You May Also Like:

Photo of author

Author S Krone

A lawyer never retires. So I would just say that I am not as active as I used to be. Now I simply dedicate myself to fishing, my hobby, and my grandchildren. For Business Finance News I write about legal aspects of mortgage policies, mostly regarding the rights of policyholders. I also have articles about personal injuries.

Thank you for visiting

Leave a Comment

Business Finance

About Us

Business Finance News is a brand oriented to business owners and dedicated to analyzing and comparing the cost and conditions of B2B procurement of goods and services through free quotes delivered by business partners.


Address 5050 Quorum Drive, (75254) Dallas TX

telephone 844-368-6072


A personal loan is a medium term loan with a fixed interest rate that is repaid in equal monthly payments and it's usually limited to 24 months. Loan offers and eligibility depend on your individual credit profile. Our lenders can help you obtain as much as $3,000 depending on the lender, your state and your financial situation.

The owner and operator of is not a lender and is not involved into making credit decisions associated with lending or making loan offers. Instead, the website is designed only for a matching service, which enables the users contact with the lenders and third parties. The website does not charge any fees for its service, nor does it oblige any user to initiate contact with any of the lenders or third parties or accept any loan product or service offered by the lenders. All the data concerning personal loan products and the industry is presented on the website for information purposes only. does not endorse any particular lender, nor does it represent or is responsible for the actions or inactions of the lenders. does not collect, store or has access to the information regarding the fees and charges associated with the contacting lenders and/or any loan products. Online personal loans are not available in all the states. Not all the lenders in the network can provide the loans up to $3,000. cannot guarantee that the user of the website will be approved by any lender or for any loan product, will be matched with a lender, or if matched, will receive a personal loan offer on the terms requested in the online form. The lenders may need to perform credit check via one or more credit bureaus, including but not limited to major credit bureaus in order to determine credit reliability and the scopes of credit products to offer. The lenders in the network may need to perform additional verifications, including but not limited to social security number, driver license number, national ID or other identification documents. The terms and scopes of loan products vary from lender to lender and can depend on numerous factors, including but not limited to the state of residence and credit standing of the applicant, as well as the terms determined by each lender individually. 


APR (Annual Percentage Rate) is the loan rate calculated for the annual term. Since is not a lender and has no information regarding the terms and other details of personal loan products offered by lenders individually, cannot provide the exact APR charged for any loan product offered by the lenders. The APRs greatly vary from lender to lender, state to state and depend on numerous factors, including but not limited to the credit standing of an applicant. Additional charges associated with the loan offer, including but not limited to origination fees, late payment, non-payment charges and penalties, as well as non-financial actions, such as late payment reporting and debt collection actions, may be applied by the lenders. These financial and non-financial actions have nothing to do with, and has no information regaining whatsoever actions may be taken by the lenders. All the financial and non-financial charges and actions are to be disclosed in any particular loan agreement in a clear and transparent manner. The APR is calculated as the annual charge and is not a financial charge for a personal loan product. 

Late Payment Implications

It is highly recommended to contact the lender if late payment is expected or considered possible. In this case, late payment fees and charges may be implied. Federal and state regulations are determined for the cases of late payment and may vary from case to case. All the details concerning the procedures and costs associated with late payment are disclosed in loan agreement and should be reviewed prior to signing any related document. 

Non-payment Implications

Financial and non-financial penalties may be implied in cases of non-payment or missed payment. Fees and other financial charges for late payment are to be disclosed in loan agreement. Additional actions related to non-payment, such as renewals, may be implied upon given consent. The terms of renewal are to be disclosed in each loan agreement individually. Additional charges and fees associated with renewal may be applied. 

Debt collection practices and other related procedures may be performed. All the actions related to these practices are adjusted to Fair Debt Collection Practices Act regulations and other applicable federal and state laws in order to protect consumers from unfair lending and negative borrowing experience. The majority of lenders do not refer to outside collection agencies and attempt to collect the debt via in-house means. 

Non-payment and late payment may have negative impact on the borrowers’ credit standing and downgrade their credit scores, as the lenders may report delinquency to credit bureaus, including but not limited to Equifax, Transunion, and Experian. In this case the results of non-payment and late payment may be recorded and remain in credit reports for the determined amount of time.