BIBS insulation being used

Blow-In-Blanket System (BIBS) Insulation

Blow-In-Blanket System (BIBS) is a process for installing loos-fill fiberglass insulation into nearly any space.

So what is BIBS?

BIBS is a certified systems that includes specific fabric and fiberglass fiber types that meet the BIBS system approval. This system has been around for a while but is becoming increasingly popular due to the energy efficiency of the system. 

BIBS insulation being used

How Is BIBS Insulation Made?

BIBS is made of small glass fibers made primarily of silica sand, soda ash and limestone. Other common fiberglass components found in various BIBS Insulation include magnesite, borax, kaolin clay, Feldspar, nepheline syenite and calcinated alumina.

BIBS Insulation has an R-value of R-15 for 3.5″ thick walls or R-4.23 per inch. In comparison, fiberglass batting insulation is rated at R-11 for 3.5″ thick walls or R-3.7 per inch.

Where To Use?

BIBS Insulation can be used as insulation for walls or roofs in both wood and steel-framed buildings either during construction or as an upgrade. It can be blown into any thickness, size or shape of a wall cavity (3.5″ and up). 

BIBS Insulation typically can last 100 years but many manufacturers state that BIBS Insulation will last the lifetime of the building it is used in. The longevity is due to the fact that the fiberglass is so densely packed, eliminating the risk of slumping. 

BIBS insulation being used

How To Install & Remove BIBS Insulation

BIBS Insulation can only be installed by contractors that have completed a BIBS training course and luckily for you, our experts have completed the training. The installation process is typically brief and creates minimal material waste. Our contractors will initially start by stapling breathable fabric on all wall/ceiling cavities to ensure the fiberglass holds in the walls.

A hole is then cut into the fabric where the blowing tube will then be placed through. Our expert technicians will then measure the stud cavities of the home and measure out the proper fiberglass insulation weight to the correct density for the space. Once the specific amount of fiberglass insulation is calculated it will then be fed into the hopper of a a pneumatic blowing system by one team member while the other team member controls the hose that is blowing the insulation into the wall cavities.

When removing BIBS Insulation the best method is to utilize an insulation vacuum to minimize exposure to fiberglass fibers. Our expert technicians will begin by inserting the vacuum hose into the wall cavity and vacuum out any and all fiberglass fibers. The fibers collected in the vacuum are then placed in secure packaging then taken to the landfill to be properly disposed of.

Pros & Cons of BIBS Insulation


  • High R-Value: BIBS has a higher R-value than Fiberglass BATTS.
  • Longevity: BIBS will last the lifetime of the building due to the dense packing of BIBS.
  • Fire Safety: Fiberglass is non-flammable and meets ASTM C674 & ASTM E136
  • Reduced Air Leaks & Dust: BIBS can reduce air leakage by 68% and prevent outdoor dust.
  • Moisture, Mold & Insect Resistant: Fiberglass does not absorb water or allow mold to grow.
  • Sound Reduction: The densely packed nature eliminates air gaps and sound transmission.
  • Dynamic Installation: Can be installed in new or existing buildings.


  • Higher Initial Cost: BIBS costs slightly more than fiberglass batts to purchase & install.
  • You Need Contractors: BIBS requires certified contractors to install the material.
  • Skin & Respiratory Issues: During installation or removal, loose fiberglass can irritate skin & respiratory functions if PPE is not worn
  • Disposal: Fiberglass is very hard to recycle and often is disposed in a landfill.

Ready to Start?

Are you ready to transform your building into the comfortable and energy efficient work/storage area it has always meant to be? Our team of professionals are ready to ensure your satisfaction every step of the way, from start to finish.

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