Celbar Wall Spray System

What is Celbar?

Download the Brochure

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Celbar Cellulose Insulation Brochure

Download Specifications

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Celbar Cellulose Insulation Specifications
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Celbar is a blend of specially prepared cellulose fibers, organic in nature, treated with adhesive and fire resistant chemicals. When sprayed in place, the interlocking fibers result in a mass that produces excellent sound and thermal properties. Celbar effectively reduces sound and heat transfer by creating dead air spaces between and within its fibers. This process seals cracks and holes in the wallboard, around plumbing and electrical outlets, vent ducts and other irregularities. There are no compressed areas or voids to allow sound leaks, R-value reduction, or air infiltration.

How does Celbar Work?

Celbar encompasses the entire cavity and has an R-value of 3.8 per inch. Celbar also stops air infiltration, keeping a cool house cool, and a warm house warm.

How is Celbar Installed?


Celbar is spray-applied in wall, floor, and ceiling cavities to form a monolithic coating.

Celbar being sprayed into a wall cavity



Celbar is applied just beyond the studs ensuring maximum coverage. Celbar is then planed flat creating an even, complete thermal barrier.

Stud Scrubbing Celbar to make a flat and complete thermal barrier


Sound Control

Floor Plan for Sound Walls
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With the popularity of home entertainment centers, surround sound speaker systems and other sound sources, interior noise pollution must be addressed. Applying Celbar wall spray within interior walls greatly reduces the sound that moves through the wall providing a quieter, more comfortable room.

Reduce Noise Between Floors

Floor Plan for Sound Walls
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Celbar Wall spray, applied between floors of multi-level dwellings helps reduce airborne noise such as voices, radios, televisions and other annoying sounds. In combination with resilient channels, Celbar wall spray reduces the impact or foot-fall noises that are very common.

Compare Insulations

Fiberglass Vs CelbarShown on the left is a comparison of Fiberglass and Celbar. Note that fitting around pipes and wires compresses fiberglass, affecting it’s overall R-Value. Also, Fiberglass leaves air gaps around electrical outlets and other irregularities.


CELBAR Loosefill, Wall Spray, Dense Pack, Stabilized 3.6 – 3.8 Newspaper, Cardboard, Borates Negligible High Recycled Content & Very Low Embodied Energy
FIBERGLASS Batts, Loosefill, Semi-Rigid Board 3.0 – 4.0 Silica Sand, Limestone, Borates, Recycled Glass, PF Resin or Acrylic Resin High Energy Use During Manufacture High Embodied Energy
MINERAL WOOL Batts, Loosefill, Semi-Rigid or Rigid Board 2.8 – 3.7 Iron Ore Blast Furnace Slag, Natural Rock, PF Binder High Energy Use During Manufacture High Embodied Energy
COTTON Batts 3.0 – 3.7 Cotton & Polyester Mill Scraps Negligible Two producers means transportation pollution is higher
CLOSED-CELL SPRAY POLYURETHANE FOAMS Spray-In Cavity Fill or Spray-On Roofing 5.8 – 6.8 Fossil Fuels, HFC-24.5fa Blowing Agent, Non-Brominated Flame Retardant High Energy Use During Manufacture, Global Warming Potential from HFC Blowing Agent Very High Embodied Energy and condensation issues
OPEN-CELLED, LOW-DENSITY POLYURETHANE FOAM (SOY) Spray-in Cavity Fill 3.6 – 3.8 Fossil Fuels & Soybeans, Water as Blowing Agent, Non-Brominated Flame Retardant High Energy Use During Manufacture Very High Embodied Energy