Asbestos Cement Board — Flintkote Company

Product Description

Asbestos cement board was a category of rigid, composite building and industrial material manufactured by combining portland cement with asbestos fibers under high pressure. The Flintkote Company, a major materials manufacturer with operations spanning roofing, flooring, and construction products throughout the twentieth century, produced asbestos cement board primarily between 1950 and 1970. During this period, the product was widely distributed to industrial facilities, commercial construction sites, and manufacturing plants across the United States.

Asbestos cement board was valued in industrial settings for its fire resistance, dimensional stability under heat, and relative durability compared to standard wood or gypsum-based panels. It was used as fireproofing panels around boilers and furnaces, as insulating board in pipe chases and mechanical rooms, as protective sheathing in high-temperature industrial environments, and as a substrate material in applications where thermal protection was required. The rigid sheet form made it straightforward to cut, shape, and install, which contributed to its widespread adoption in heavy industry and commercial construction during the postwar decades.

The Flintkote Company was one of several major manufacturers operating in the asbestos-containing building products market during this era. The company maintained manufacturing facilities and a national distribution network that placed its asbestos cement board products in a broad range of industrial and commercial worksites throughout the 1950s and 1960s.

Asbestos Content

Asbestos cement board manufactured by the Flintkote Company during its production run contained chrysotile asbestos, the most commercially prevalent form of asbestos used in American industry during this period. Chrysotile, sometimes called white asbestos, is a serpentine-group mineral fiber that was widely sourced from North American and international deposits and incorporated into cement composites because of its tensile strength, heat resistance, and bonding properties within the cementite matrix.

In asbestos cement board, chrysotile fibers were mixed into the slurry before pressing, allowing the fibers to become integrated throughout the finished panel. This construction method meant that the asbestos was not isolated to a surface coating but was distributed through the body of the material. While the fibers were encapsulated within hardened cement under undisturbed conditions, the physical manipulation of the boards — cutting, drilling, sanding, breaking, or demolition — could liberate respirable fibers into the surrounding air.

Chrysotile asbestos has been classified as a known human carcinogen by the International Agency for Research on Cancer (IARC) and is regulated as a hazardous material under the Asbestos Hazard Emergency Response Act (AHERA) and Occupational Safety and Health Administration (OSHA) standards. OSHA’s current permissible exposure limit (PEL) for asbestos is 0.1 fibers per cubic centimeter of air as an eight-hour time-weighted average, with an excursion limit of 1.0 fibers per cubic centimeter over a thirty-minute sampling period.

How Workers Were Exposed

Industrial workers were the primary occupational population documented as exposed to asbestos cement board manufactured by the Flintkote Company during the product’s production and use period. Exposure pathways were varied and reflected the range of tasks workers performed when handling, installing, maintaining, or demolishing materials containing this product.

Fabrication and installation activities created the most direct exposure opportunities. Workers who cut asbestos cement board to size using hand saws, circular saws, or grinders generated visible dust clouds containing respirable chrysotile fibers. Drilling through panels for fasteners or pipe penetrations similarly disturbed the fiber-containing matrix. In the decades before mandatory respiratory protection requirements were broadly enforced, these tasks were frequently performed without adequate controls, and workers in proximity to cutting operations could inhale significant concentrations of airborne fibers.

Maintenance and repair workers in industrial facilities faced ongoing exposure risks throughout the operational life of installed asbestos cement board. Boards used as protective sheathing near boilers, heat exchangers, and pipe systems were subject to mechanical impacts and thermal cycling that could cause surface degradation, edge fraying, or cracking — conditions that increase fiber release from previously stable material.

Demolition and renovation activities also created significant exposure potential. Workers tasked with removing old asbestos cement board during facility upgrades or equipment replacements would break and handle the panels under conditions that generated substantial dust. Without proper abatement procedures — which were not standard practice during much of the product’s in-use period — demolition work in spaces containing Flintkote asbestos cement board could expose workers to elevated fiber concentrations.

Industrial workers generally — including those in manufacturing plants, power generation facilities, chemical processing operations, and heavy industry — represented the documented occupational population with potential exposure. The broad distribution of asbestos cement board in postwar industrial construction means that exposure could occur among workers who never directly handled the product but worked in shared spaces where cutting or demolition was taking place.

The latency period for asbestos-related diseases — including mesothelioma, asbestosis, and asbestos-related lung cancer — typically spans decades between initial exposure and clinical diagnosis. This characteristic means that workers exposed to Flintkote asbestos cement board during the 1950s and 1960s may be receiving diagnoses today.

The Flintkote Company has been the subject of asbestos litigation. Litigation records document claims filed against Flintkote related to asbestos-containing products manufactured and distributed during the company’s operational period. Plaintiffs alleged that the Flintkote Company knew or should have known that its asbestos-containing products, including asbestos cement board, posed health hazards to workers who handled or were exposed to them, and that the company failed to provide adequate warnings about those hazards.

Plaintiffs alleged that this failure to warn contributed directly to their development of serious asbestos-related diseases, including malignant mesothelioma, lung cancer, and asbestosis. Litigation records document claims brought by industrial workers and, in some cases, their surviving family members.

No dedicated Flintkote asbestos trust fund is currently identified as accepting claims for asbestos cement board under this specific product category. Individuals diagnosed with an asbestos-related disease who have a documented history of exposure to Flintkote asbestos cement board may have legal options that include:

  • Direct civil litigation against responsible parties in applicable jurisdictions
  • Multi-defendant asbestos litigation, which may name additional manufacturers, distributors, or site owners whose products contributed to the claimant’s overall asbestos exposure history
  • Review of other trust fund eligibility, as many workers with exposure to one asbestos product also have documented exposure to products covered by active asbestos bankruptcy trusts

Individuals seeking to evaluate their legal options should consult with an attorney experienced in asbestos litigation. Documentation supporting a claim typically includes employment and occupational history records, medical records confirming an asbestos-related diagnosis, and product identification linking the claimant’s worksite to Flintkote asbestos cement board during the relevant exposure period.

This article is provided for informational and reference purposes only and does not constitute legal advice. Individuals with asbestos-related health concerns should consult qualified medical and legal professionals.