Asbestone Roofing by National Gypsum Co.

Product Description

Asbestone Roofing was a building material manufactured by National Gypsum Co., one of the largest producers of construction and finishing products in the twentieth century. National Gypsum operated across a broad range of product categories, supplying materials to commercial construction, industrial facilities, and residential building markets throughout much of the 1900s.

The Asbestone Roofing product line was part of National Gypsum’s wider portfolio, which extended beyond roofing into ceiling tile, cement pipe, joint compound, pipe insulation, and refractory applications. The company marketed these materials to contractors, builders, and industrial buyers during an era when asbestos was routinely incorporated into building products for its heat resistance, tensile strength, and durability. Roofing materials of this type were installed across a wide range of structures, including warehouses, manufacturing plants, commercial buildings, and institutional facilities.

National Gypsum Co. ultimately became subject to asbestos-related litigation and financial reorganization, reflecting the broader legal and public health consequences that followed widespread industrial use of asbestos-containing construction materials throughout the twentieth century.

Asbestos Content

Asbestone Roofing was associated with asbestos content consistent with National Gypsum’s broader manufacturing practices during the period when asbestos was a commonly used additive in building materials. Asbestos fibers were incorporated into roofing products of this era for several practical reasons: they improved fire resistance, added structural integrity, and enhanced the material’s ability to withstand temperature fluctuations and weathering over time.

Litigation records document that plaintiffs alleged National Gypsum’s products, including materials marketed under the Asbestone name, contained asbestos in formulations that posed health hazards to individuals who worked with or around them. Asbestos-containing roofing products could contain chrysotile asbestos, and in some industrial product lines, other fiber types were used depending on the application requirements.

As with many mid-century building materials manufactured by large industrial companies, specific fiber concentrations in Asbestone Roofing are documented primarily through litigation discovery records, product testing conducted in the context of legal proceedings, and regulatory review processes rather than through fully public technical specifications.

How Workers Were Exposed

Industrial workers represent the primary occupational group documented in connection with exposure to Asbestone Roofing and related National Gypsum products. Exposure pathways varied depending on the specific task, work environment, and the condition of the material at the time of contact.

Litigation records document that plaintiffs alleged exposure occurred during the installation, cutting, shaping, and removal of asbestos-containing roofing materials. When roofing sheets or tiles were cut to fit a surface, sawed, drilled, or broken, asbestos fibers could be released into the surrounding air. Workers in enclosed or poorly ventilated spaces faced heightened risk, as airborne fibers could accumulate to significant concentrations without adequate respiratory protection or engineering controls.

Demolition and renovation work presented additional exposure risks. Workers tasked with removing old or deteriorating roofing materials from industrial and commercial structures could disturb previously stable asbestos-containing products, releasing fibers that had been bound within the matrix of the original material. Plaintiffs alleged that this type of secondary disturbance was a significant source of occupational exposure, particularly for tradespeople involved in building teardown, re-roofing projects, and industrial maintenance.

Beyond roofing installation itself, National Gypsum’s product categories encompassed ceiling tile, cement pipe, joint compound, pipe insulation, and refractory materials. Workers in industrial settings were often exposed to multiple product types simultaneously, meaning that individuals who encountered Asbestone Roofing on a job site may also have been exposed to asbestos through other National Gypsum products used in the same facility or construction project.

Industrial workers generally — including laborers, maintenance technicians, construction crew members, and factory workers — are among the occupational groups documented in litigation records as having alleged exposure to National Gypsum’s asbestos-containing product lines. These workers often spent extended periods in environments where asbestos-containing materials were being applied, disturbed, or removed, sometimes without knowledge that the products they were handling contained hazardous fibers.

Bystander and secondary exposure also appears in litigation records, with plaintiffs alleged to have been exposed not through direct handling of Asbestone Roofing but through proximity to work activities that generated airborne fiber release.

Legal Classification: Asbestone Roofing by National Gypsum Co. is classified as a Tier 2 product for purposes of asbestos liability documentation, meaning that legal claims associated with this product have proceeded primarily through civil litigation rather than through a dedicated asbestos bankruptcy trust fund established specifically for National Gypsum claimants.

Litigation History: Litigation records document that National Gypsum Co. faced substantial asbestos-related civil claims arising from its manufacturing activities. Plaintiffs alleged that National Gypsum knew or should have known of the health hazards associated with asbestos-containing products, including roofing materials, and that the company failed to provide adequate warnings to workers and end users. Claims brought against National Gypsum in connection with asbestos exposure have included allegations of negligence, strict product liability, and failure to warn.

Legal Proceedings: Because Tier 2 classification applies to this product, individuals seeking legal remedies for asbestos-related illnesses connected to Asbestone Roofing or other National Gypsum products should pursue claims through the civil litigation system. Asbestos-related disease claims, including mesothelioma, lung cancer, asbestosis, and other conditions recognized under asbestos tort law, may be brought against responsible parties in state or federal court.

Who May Have a Claim: Individuals who worked with or around Asbestone Roofing during installation, maintenance, renovation, or demolition activities, as well as those who worked in facilities where National Gypsum products were used, may have potential legal claims if they have been diagnosed with an asbestos-related disease. Family members of workers who carried asbestos fibers home on clothing or equipment may also have grounds for secondary exposure claims in certain jurisdictions.

Recommended Steps: Anyone who believes they were exposed to Asbestone Roofing or other National Gypsum asbestos-containing products and has received a diagnosis of mesothelioma, asbestos-related lung cancer, asbestosis, or another asbestos-attributable condition should consult with an attorney experienced in asbestos litigation. Documentation of work history, product identification, and medical records is critical to building a viable claim. Statutes of limitations governing asbestos claims vary by state, and timely consultation with qualified legal counsel is strongly advised.

This article is provided for informational and reference purposes. It does not constitute legal advice. Consult a licensed attorney for guidance specific to your circumstances.