JM of New Bedford

Spray-in Insulation

Rockwool insulation, manufactured by Amerrock
Guaranteed against defect or settling for the life of the building.

For new home construction
See Blown-in insulation for existing homes

Composition:

Recycled steel slag
Inorganic with no chemical additives
Completely green product
High density

Advantages:

Higher R- value: R-16 in 4 inch stud space
R-38 in attic (10 inches)
No Settling,
Fireproof: Non combustible, made at 3,000 degrees Fahrenheit
will not absorb moisture:
will not support fungus growth: Passed ASTM E 1338 Fungus resistant test
will not house insects or varmints: Inedible and abrasive qualities deter unwelcome guests
Superior sound reduction: Higher density insulation provides the best noise reduction

Rockwool Insulation comparison to other insulations

Feature	CELLULOSE	FIBERGLASS	ROCKWOOL	COMPARISON
Dominant Raw Material	Old newspaper and other scrap paper products. Organic material.	Silica sand and recycled glass material. Inorganic material.	Refined smelter ore. Inorganic material. Predominantly recycled	Because of its organic nature, cellulose is naturally subject to burning and decomposition
Production Process	Paper is ground into a fine, dust-like consistency.	Sand is melted with recycled glass and spun into fine glass fiber.	Ore is melted and spun into long mineral fibers.	Due to its natural tendency to burn or decompose, cellulose is considered to be a hazardous product.
Chemical Additives	Large amounts of boraz and boris acis plus other additives.	Some dyes added	None.	Cellulose additives are designed to reduce burning and rotting tendencies.
Fire Proof	Fire resistant, but when ignited will support combustion.	Non-combustible. Will not support combustion but will melt at approximately 1,000F	Non-combustible. Will not support combustion and will not melt unless temperature exceeds 2,000F	The additives that make cellulose fire resistant often dissipate over time, leaving the material readily combustible.