Coarse fibers and dust from mineral wool products can cause emporary and reversible irritation (itching, redness) of the skin and eyes. The itching and possible inflammation are a mechanical reaction to dust and coarse fibers (more than about 5 μm in diameter) and are not damaging in the way chemical irritants may be.

3.7 – 4.2 per inch
The R-value of Thermafiber® mineral wool insulation ranges from 3.7 – 4.2 per inch of thickness. It is available in multiple thicknesses, densities, and various facings by product type. Reflected by its R-value, mineral wool’s insulating performance is achieved by its densely packed fibers.

ULTRABATT™ Formaldehyde-Free The new formaldehyde-free Thermafiber® light density products are especially appropriate for applications committed to indoor air quality. Thermafiber® UltraBatt™ FF insulation is non-combustible, non-corrosive, non-deteriorating, and mold resistant.

4.0 pcf
Density: 4.0 pcf (nominal). e. Product: Thermafiber UltraBatt; unfaced.

Thermafiber has a single 145,000-sq. ft. plant in Wabash, Indiana, with about 150 employees.

Mineral wool is commonly used to insulate exterior walls, basements, and heated crawl spaces. It can also be used in continuous insulation applications. Fiberglass is typically used to insulate interior and exterior walls, basements, garages, and attics, but it is not used as continuous exterior insulation.

Nominal Density: 4 pcf MinWool Safing Insulation provides a fire-rated seal when installed between the spandrel panel and the floor slab in commercial curtainwall systems, and around ducts and pipes. It also prevents the passage of flame and smoke in openings that penetrate fire-rated assemblies.

No Rebates. Change Location. This item: R-15 Thermafiber UltraBatt Unfaced Mineral Wool Insulation Batt 15in. x 47in. Non-combustible insulation resists fire and temperatures in excess of 2000F, giving you more time to get out in the event of a fire.

Therma-fiber UltraBatt mineral wool is designed to provide excellent thermal insulation in residential and light commercial building. The semi-rigid batts are more dense than traditional batts or rolls and are quick and easy to install. UltraBatt products are non-combustible, moisture-resistant, non-corrosive and mold resistant.

(ASTM C 1338) Thermafiber Fire and Sound Guard insulation is designed to provide exceptional acoustical control and fire resistance. Thermafiber Fire and Sound Guard insulation is for use in interior walls, floors and ceilings.

Thermafiber insulation is easy to install with minimal PPE required. Thermafiber insulation is easy to cut with a serrated knife for custom fitting around electrical boxes, pipes, ductwork, wiring or between nonstandard studs and joists.