Rock Wool Manufacturing Company

Rock Wool Manufacturing Company Logo
  • Founded: 1943

  • Years Operated: 1943-present

  • Headquarters: Leeds, Alabama

  • Business: Manufactures insulation and cement

  • Asbestos Trust: Yes

  • Bankruptcy Status: Filed on Nov. 18, 1996, and reorganized on Dec. 3, 1999

    Trust Fund Information

  • Amount in Trust: Inactive

  • Year Created: 1999


Rock Wool Manufacturing Company is a residential wool insulation manufacturer founded in 1943 in Leeds, Alabama. Much of its products sold today are marketed under the trade name Delta. The company's involvement in construction materials expanded gradually, encompassing insulating cements and asbestos boards in the 1950s.

Rock Wool’s products included items used in all areas of construction. Until 1987, Rock Wool manufactured two types of mineral wool insulation material, blow wool and batt wool. In 1988, the company added wrapped pipe insulation to its manufacturing processes. Rock Wool still makes products for industrial and commercial buildings, as well as marine applications.

Rock Wool incorporated asbestos into their products primarily for insulating purposes. The installation or removal of such products was a source for asbestos exposure. The workers who manufactured Rock Wool products also faced asbestos hazards while on the job.

Exposed to Asbestos at Rock Wool?

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Litigation & Specific Lawsuits

The Rock Wool Manufacturing Company was named as a defendant in many asbestos cases, some of which were filed by people with mesothelioma cancer. During a 1994 trial, a jury found Rock Wool negligent of producing unreasonably dangerous products. In addition to having to pay damages to a number of parties, the company was found guilty of not placing hazard warnings on their products. In 1996, these lawsuits forced the company to file for Chapter 11 bankruptcy.

After filing for bankruptcy, the Asbestos Resolution Trust was formed to process new asbestos claims against Rock Wool Manufacturing Company. The trust provides information on open filing times for new plaintiffs and describes payment terms. This trust does not allow claim processing year round because it addresses cases that concern two other asbestos manufacturing companies.

In a 1995 case filed by Samuel Jackson and his wife, Rock Wool Manufacturing Company was one of the many co-defendants that settled during trial. The Jacksons claimed asbestos-containing products manufactured by Rock Wool caused Samuel Jackson to develop an asbestos-related disease. This case was just one of the 140,000-plus asbestos lawsuits filed against Rock Wool.

Industries & Occupations

Rock Wool manufactured asbestos insulation and other asbestos-containing products for a variety of purposes. Their pipe insulation products are likely responsible for much of their ties to asbestos exposure. These products were used in many locations and affected a number of occupations, including power plant workers, shipyard workers and even Navy crew members. Rock Wool products were commonly used in shipbuilding.

Workers who helped make these products faced some of the biggest risks for exposure. Former workers of Rock Wool should be well aware of symptoms associated with asbestos-related diseases. The construction industry was impacted by Rock Wool asbestos products more than any other industry.

Rock Wool used asbestos in their cement products from 1958 to 1970. The Delta Maid products included One Shot Insulating Cement, High Temp Insulating Cement and High Temp-Master Insulating Cement. These adhesives were used to secure thermal pipe insulation to pipes after asbestos insulation was tightly wrapped around them. When these products are disturbed during renovations or other projects, asbestos dust becomes airborne and those nearby can inhale asbestos.


Two products manufactured by Rock Wool known to contain asbestos include One Shot and Delta Maid AF. Both of these items are insulation cement products and were likely used to help secure pipe insulation.

Asbestos Resolution Trust

The trust was most recently open for claim filing during Nov. 14, 2010, through Jan. 13, 2011. The amount paid to each claimant is based on available funds and the total number of claims.

Additional Resources

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Matt Mauney is an award-winning journalist with nearly a decade of professional writing experience. Prior to joining The Mesothelioma Center as a Content Writer in 2016, Matt spent three years as an Online Producer for the Orlando Sentinel.

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  2. Coppolo, G. (2009). Asbestos Litigation in Connecticut. Retrieved from
  3. RAND. (2010). Asbestos Bankruptcy Trusts: An Overview of Trust Structure and Activity with Detailed Reports on the Largest Trusts. Retrieved from
  4. OpenJurist. Jackson v. Owens-Corning Fiberglas Corporation. Retrieved from
  5. Birmingham News. Asbestos in Alabama: The Business of Death. Retrieved from

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