Developer / Architect

Preferred by Architects Across the Board

For architects, providing a flexible solution is key to their often unique design element – American Rockwool extensive product line of Rockwool products offers more than just thermal insulation. Sound engineers and fire protection contractors choose our products because of the excellent acoustic values and fire protection characteristics. It is also the sustainable choice for modern buildings because of the extensive LEED contribution available.

Extra Benefits

In addition to its thermal insulation properties, Rockwool Premium Plus™ also offers a non-combustible layer in the building which gives added protection in the event of a fire because it will not burn. It also acts as an effective sound barrier, reducing noise between rooms or floors, or from the outside environment, and because it is made of rocks it will not sustain mold, mildew, or fungus. Our specially formulated adhesives allow for the immediate installation of drywall, so as not to slow the project down by waiting on the insulation to dry.

Customer Satisfaction

Your customers will be pleased for lots of reasons.

  • Peace of mind in the event of a fire.
  • Improving indoor air quality and the comforts of their home.
  • Water resistant so (once dry) it will perform as before a leak or flood.
  • The durability - they’ll never have to worry about replacing it because Rockwool Premium Plus™ will not sag or settle*. It has stood the test of time and continues to outperform the competition.

* REFERENCE: Svennerstedt, B., "Field Data on Settling in Loose-Fill Thermal Insulation," Insulation Materials, Testing, and Applications, ASTM STP 1030, D. L. McElroy and J. F. Kimpflen, Eds., American Society for Testing and Materials, Philadelphia, 1990, pp. 231-236.

Rockwool Premium Plus and FireStopTB are both Class 1 Fire Rated Products

ASTM E-84/UL-723 Smoke Developement - 0 Flame Spread - 5
E-136 Standard Test for Behavior of Materials in a Vertical Tube Furnace at 750°C NON-Combustible
U-305 1 Hour Fire Rated Wall Design Pass
E-119 Standard Test for Fire Tests of Building Construction and Materials 1 Hour
E-119 Standard Test for Fire Tests of Building Construction and Materials 2 Hour 1250 lbs. load bearing

ASTM E 283-04 Rate of Air Flow (1.83 cfm/sf @ 50 Pa & 3.68 cfm/sf @ 75 Pa)
ASTM E 413 Sound Isolation Rating (various assemblies up to STC 69)
ASTM E 605 Standard Test Methods for Thickness and Density
ASTM E 736 Standard Test for Adhesion/Cohesion - minimum 200 psf*
ASTM E 759 Standard Test for Deflection - PASS*
ASTM E 859 Standard Test for Air Erosion - .1 gram loss over 24 hr. period*
ASTM C 423 NRC Rating of .85 at 1.5”
ASTM C 1014 Standard Specification for Spray Applied Mineral Fiber
ASTM C 739 Smoldering Combustion (Pass)
ASTM C 553 Moisture Absorption (Pass)
ASTM C 665 Non Corrosive (Pass)
ASTM C 1338 Mold & Fungus Resistance (Pass)

*All testing was done using Rock-Tight Adhesive or FireStop TB Adhesive

ICC-ES Report 9551A Fire Resistive Construction
UL Classified per Follow-up R14191
Approved by the New York City Board of Standards and Appeals under MEA #352-98-M