Fibreboard Corporation / Pabco Products

Company History

Fibreboard Corporation traces its origins to 1894, when it was established as a manufacturer of building and insulation materials serving West Coast industrial markets. Over the following decades, the company grew into one of the more significant producers of construction and industrial insulation products in the United States, operating under both the Fibreboard Corporation name and its Pabco Products brand. Headquartered in Walnut Creek, California, the company built a strong regional presence that extended into national distribution networks, supplying materials to shipyards, refineries, power plants, and commercial construction projects throughout the mid-twentieth century.

Pabco Products became Fibreboard’s primary brand identity in the insulation and roofing market, and Pabco-labeled goods were among the most widely recognized industrial insulation products on West Coast jobsites from the 1940s through the early 1970s. The company’s manufacturing and distribution infrastructure allowed Pabco insulation products to reach industrial facilities across the country, though demand was particularly concentrated in California shipyards and Pacific Coast industrial plants that expanded rapidly during and after World War II.

Fibreboard Corporation ceased incorporating asbestos into its products in 1971, a decision that coincided with growing regulatory scrutiny of asbestos in the workplace and early epidemiological research linking occupational asbestos exposure to serious pulmonary disease. The company continued to operate in the building products sector after that date but faced mounting asbestos personal injury litigation in the 1980s and early 1990s as former workers began receiving diagnoses of mesothelioma, asbestosis, and asbestos-related lung cancer. The volume and financial scope of that litigation ultimately drove Fibreboard Corporation to file for Chapter 11 bankruptcy protection in 1993. That filing led to the establishment of the Fibreboard Corporation Asbestos PI Trust, which remains the primary legal mechanism through which individuals harmed by Fibreboard and Pabco asbestos-containing products may seek compensation today.

Asbestos-Containing Products

Fibreboard Corporation, through its Pabco Products division, manufactured and sold several categories of asbestos-containing products between the 1940s and 1971. The following products have been documented in trust claim records, product identification studies, and occupational exposure histories:

Pabco Pipe Covering and Block Insulation

Pabco pipe covering was one of the company’s most widely distributed asbestos-containing products. Designed for use on high-temperature steam and process piping systems in industrial settings, this pipe covering was manufactured in sections that fit around pipe diameters ranging from small residential supply lines to large-diameter industrial mains. Block insulation in the Pabco line served a similar function on flat or curved equipment surfaces such as boilers, pressure vessels, and heat exchangers.

Both pipe covering and block insulation in this product line were composed of materials that incorporated asbestos fibers as a primary binding and insulating component. The asbestos content in mid-century thermal insulation products of this type typically ranged from approximately 15 to 50 percent by weight, providing the heat resistance and structural stability required for industrial applications. Workers who cut, fit, removed, or worked in proximity to Pabco pipe covering and block insulation during installation or maintenance operations were subject to significant airborne asbestos fiber release.

Pabco Insulation Cement

Pabco insulation cement was a finishing and patching compound applied over sectional pipe covering and block insulation to create a smooth, continuous thermal barrier. Insulation cements of this era were commonly mixed on-site with water and applied by hand or trowel, a process that generated substantial dust when the dry powder was poured and mixed. The asbestos fibers bound within insulation cement could become airborne both during mixing and during any subsequent sanding, shaping, or removal of the cured material. Pabco insulation cement was used in conjunction with other Pabco insulation products at shipyards, power stations, refineries, and commercial mechanical rooms throughout the period of asbestos use.

Pabco Resin-Bonded Mineral Wool Insulation

Fibreboard also manufactured a resin-bonded mineral wool insulation product under the Pabco name. While mineral wool itself is a non-asbestos material, product testing and historical documentation of mid-century Pabco mineral wool lines has revealed the presence of asbestos fiber content in certain formulations, a practice that was common among insulation manufacturers of the era who used asbestos as a supplementary binder or fire-resistant additive even in products not primarily marketed as asbestos-containing. Workers who handled Pabco resin-bonded mineral wool insulation during this period may have had asbestos exposure that is relevant to a trust claim evaluation.

Occupational Exposure

Pabco insulation products were distributed and installed across a broad range of American industrial environments, with particularly dense use documented in West Coast shipyards and industrial plants. The following occupational groups historically worked with or around Fibreboard and Pabco asbestos-containing products:

Pipefitters and insulation workers applied Pabco pipe covering, block insulation, and insulation cement directly to piping systems and equipment. These trades involved cutting sections to length, fitting curved covers around pipes, and troweling finishing cement — all tasks that generated significant asbestos dust under the working conditions typical of the mid-twentieth century.

Shipyard workers, particularly those employed at California and Pacific Northwest naval and commercial shipyards during and after World War II, encountered Pabco insulation products extensively. Engine rooms, boiler spaces, and pipe chases aboard ships under construction or repair were heavily insulated with products of this type, creating enclosed environments where asbestos fiber concentrations could reach dangerous levels.

Boilermakers and stationary engineers worked alongside insulation trades during the installation and maintenance of boiler systems, power plant equipment, and industrial process systems where Pabco products were specified.

Maintenance and demolition workers who removed or disturbed previously installed Pabco pipe covering and insulation cement during system upgrades or renovation work faced significant secondary exposure, since aged asbestos-containing insulation that is cut, broken, or torn releases fibers in quantities comparable to or exceeding those generated during original installation.

Roofing workers may also have encountered Fibreboard’s roofing product lines, which included asbestos-containing materials distributed through the company’s national sales network.

Asbestos-related diseases including mesothelioma, asbestosis, asbestos-related lung cancer, and pleural disease typically have latency periods of 20 to 50 years between initial exposure and clinical diagnosis. Workers exposed to Pabco products in the 1940s, 1950s, 1960s, and up to 1971 may be receiving diagnoses today or in coming years. Family members who laundered work clothing contaminated with asbestos dust may also have experienced secondary household exposure.

Fibreboard Corporation filed for Chapter 11 bankruptcy protection in 1993 in response to the accumulated liability created by asbestos personal injury claims. As part of the bankruptcy reorganization process, the Fibreboard Corporation Asbestos PI Trust was established to receive, evaluate, and pay claims from individuals who suffered asbestos-related injury as a result of exposure to Fibreboard or Pabco asbestos-containing products.

The Fibreboard Corporation Asbestos PI Trust is an active trust currently accepting claims. It operates under Trust Distribution Procedures that define eligible disease categories, exposure requirements, and claim valuation schedules.

Eligible disease categories generally include mesothelioma, lung cancer with a documented history of significant asbestos exposure, asbestosis, and other asbestos-related pleural conditions. Each disease level carries its own claim value range established by the Trust Distribution Procedures in effect at the time of filing.

Exposure requirements for a Fibreboard/Pabco trust claim typically require documentation showing that the claimant was exposed to a Fibreboard or Pabco asbestos-containing product at an identified jobsite during the period of asbestos use. This documentation may take the form of employment records, union work histories, coworker affidavits, Social Security earnings records, or product identification testimony establishing that Pabco products were present at the claimant’s worksite.

Medical documentation establishing a qualifying diagnosis through pathology reports, imaging studies, or pulmonary function testing will be required as part of any claim submission.

Survivors and family members of deceased workers who were diagnosed with a qualifying asbestos-related disease prior to death may be eligible to file claims on behalf of the decedent’s estate.

If you or a family member was diagnosed with mesothelioma, asbestos-related lung cancer, or asbestosis, and your work history includes exposure to Pabco pipe covering, Pabco insulation cement, or other Fibreboard Corporation products, you may be eligible to file a claim with the Fibreboard Corporation Asbestos PI Trust.

The trust exists specifically to compensate individuals harmed by Fibreboard and Pabco asbestos-containing products and does not require filing a lawsuit to initiate a claim. An attorney experienced in asbestos trust claims can evaluate your work history and medical records, identify any applicable trust claim, and guide the submission process. Because asbestos trust claims are subject to statutes of limitations tied to diagnosis dates, individuals who have received a recent diagnosis should seek legal consultation promptly. Workers with exposure histories at West Coast shipyards, California refineries, or other industrial facilities where Pabco products were commonly used are particularly encouraged to have their exposure history reviewed.