Superior Sound Control

The insulation system used in your home critically impacts the comfort, energy efficiency, and sound control of the home. Within the walls of the most acoustically sound controlled home is the BIBS® system, the leading residential and commercial high-performance insulation system. The BIBS system is a proven, state-of-the-art insulation system utilizing specially manufactured fiberglass blowing wools installed in the walls, floors, attics, and ceilings behind a proprietary fabric. This forms a seamless blanket of insulation that completely fills around pipes, wires and other objects inside the cavity to help eliminate costly voids and air gaps, reduce sound attenuation, and maximize thermal efficiency. This process helps provides you with the highest effective R-values attainable today.

Many builders try to incorporate sound control in the design of a home, but are often disappointed with the results. Fortunately, there is a solution that helps achieve the optimum level of sound control and provides critical insulation to the home. The BIBS system does both. It helps control the transmission of sound and provide the insulating R-value required by jurisdictions.

Controlling unwanted noises in buildings is critical, especially in newer homes that feature sophisticated, cinema-quality home theater systems. One of the most cost-effective ways to control sound is to add blown-in fiberglass insulation to walls, floors, and ceilings. Choosing the right system is critical, but proper installation is equally as important. Tests conclude that installing insulation between rooms attenuates (reduces) sound transmission and is one of the most effective method of reducing airborne transmission at medium to high frequencies (normal speaking range.) This consistent density of insulation reduces sound transmission and provides the homeowner with appreciable sound control.

High-Performance Insulation System

The BIBS system uses only high-quality fiberglass blowing wools produced by industry-leading manufacturers CertainTeed, Johns Manville, and Knauf Insulation. Unlike other insulation systems that may leave voids or gaps, the BIBS system completely fills the space which reduces sound transmission through the wall cavity. Sound testing by both Johns Manville and sound experts Faszer, Farquharson and Associates (see sound control testing whitepaper) show that fiberglass can add four to ten points to the STC (sound transmission class) of a wall or ceiling assembly. Fiberglass blowing wool is a permanent solution that doesn’t settle or deteriorate over time, and therefore, will not lose its acoustical effectiveness.

In addition to its sound controlling benefits, the BIBS system also offers outstanding thermal performance and high R-values, reducing heating and cooling energy use, and leaving you with a more energy-efficient home. It does not settle, separate, or corrode pipes or wires. It is also fire-resistant, moisture-resistant, and does not attract or act as sustenance for animals. And because the BIBS system uses non-combustible fiberglass, there are no chemicals or noxious odors over time.

Testing Sound Control Effectiveness

In the test graphic below, a small wall assembly was constructed with wood studs, resilient channels, and gypsum wallboard. Penetrations were made for single and back-to-back metal electrical boxes, as shown in the graphs to the right. The wall assembly was tested in three ways – no insulation, fiberglass batt insulation, and the BIBS system. The assembly was tested to measure the speech frequency (500-2000Hz) sound transmission through the wall using a sound intensity-mapping program.

Testing Environment

In order to simulate a true field installation, instead of laboratory conditions, R-11 kraft-faced insulation was cut with up to a 1/8″ gap around all three metal electrical boxes. No insulation was installed between the back-to-back electrical boxes. Then, high sound levels were generated on one side of the assembly, and sound energy was transmitted through the panel. On the quiet side of the assembly, a sound intensity probe was used to scan the surface, measuring regions of locally high and low sound intensity levels.


Sound intensity contour maps were generated from the experiment to graphically display the sound energy transmitted through the wall. The colors indicate local regions of high and low sound transmission.

Source:  Test conducted by Faszer, Farquharson and Associates and Johns Manville

View the sound control effectiveness whitepaper by Faszer, Farquharson and Associates


The contour maps show leakage through the back-to-back electrical box penetrations and slight leakage from the single metal electrical box penetration. The three tested assemblies demonstrate the importance of quality installation for sound control effectiveness. The small gaps in the R-11 batt insulated assembly clearly show reduced sound control effectiveness through the wall in the 500 to 2000 Hz frequency range.

Approved Use Fibers

Certainteed InsulSafe®SP, InsulSafe®XC, Optima®

Johns Manville Climate Pro® and Spider™

Knauf Jet Stream® MAX and Jet Stream® ULTRA

Building Standards

The BIBS system meets the following codes and standards:

  • International Building Code
  • International Residential Code
  • International Energy Conservation Code


The BIBS system has been evaluated and accepted by the following government agencies:

CCMC #13198R and 11790R

Availability and Installation

Only contractors trained and certified by a BIBS system instructor may install the system. This is the BIBS system difference. It ensures a proper installation and outstanding performance. Our established network of insulation specialists extends across the United States and Canada.

When the BIBS system is installed by a certified contractor, you have the peace of mind that the job will be completed properly. Certified contractors are thoroughly trained to precise standards and continuing education keeps the skills of the BIBS system certified installers sharp. Onsite testing by a certified contractor to precise density standards helps ensure the highest level of thermal performance and sound control.

Click here to find a certified contractor