Classic Shake Siding by National Gypsum Co

Product Description

Classic Shake Siding was a building material manufactured by National Gypsum Co, a company with deep roots in the American construction industry. National Gypsum operated across multiple product lines spanning ceiling tiles, cement pipe, joint compounds, pipe insulation, and refractory materials — product categories that collectively placed the company among the major industrial manufacturers whose goods were installed throughout residential, commercial, and industrial construction projects during the mid-twentieth century.

Classic Shake Siding was designed to replicate the aesthetic of traditional wood shake siding while offering the durability and fire resistance properties that builders and contractors sought for exterior cladding applications. Like many building products manufactured during the peak decades of asbestos use in American industry, this product emerged during an era when asbestos-containing materials were widely specified for their thermal resistance, tensile strength, and fireproofing characteristics. National Gypsum’s product portfolio reflected the broader industry practice of incorporating asbestos into a wide range of construction materials that were distributed nationally and installed across virtually every type of built environment.

National Gypsum Co itself was a major manufacturer headquartered in the United States, operating plants and distribution networks that supplied contractors, builders, and industrial facilities throughout the country. The company’s involvement in multiple construction product categories meant that its materials appeared in diverse occupational settings, from residential housing developments to large-scale industrial facilities.

Asbestos Content

Classic Shake Siding falls within a product line associated with National Gypsum Co, a manufacturer whose products across several categories — including ceiling tiles, cement pipe, joint compound, pipe insulation, and refractory materials — have been the subject of litigation and regulatory scrutiny concerning asbestos content.

Asbestos-containing siding products manufactured during the relevant production era commonly incorporated chrysotile asbestos, and in some formulations other asbestos fiber types, as a reinforcing and fireproofing component. Cement-based siding products of this type were frequently manufactured using asbestos fibers to bind the cementitious matrix, improve impact resistance, and provide fire-rated performance characteristics that made them attractive for exterior building applications.

Litigation records document allegations that National Gypsum Co manufactured and distributed products containing asbestos across its product lines during the periods when such materials were commercially standard. Plaintiffs alleged that these products contained asbestos fibers capable of release during normal handling, installation, and particularly during cutting, trimming, and mechanical fastening operations — activities routine to siding installation work.

The specific asbestos content by percentage and the precise years of production for Classic Shake Siding are subject to the evidentiary record developed through litigation and product testing. As with many asbestos-containing building materials, product formulations may have varied across production runs and manufacturing facilities.

How Workers Were Exposed

Industrial workers and construction tradespeople represent the populations most directly associated with occupational exposure to asbestos-containing siding products. Litigation records document that workers involved in the handling, cutting, installation, and removal of asbestos-containing siding materials faced potential fiber release during the ordinary course of their work.

The installation of shake-style siding required workers to cut panels to fit around windows, doors, corners, and architectural features. Cutting asbestos-cement siding with hand saws, power saws, or other abrasive tools was documented as a significant source of airborne asbestos fiber generation. Unlike intact panels, cut edges and trimmed sections released fibers directly into the breathing zone of workers performing the cuts and those working in proximity.

Plaintiffs alleged that workers engaged in the following activities faced elevated exposure risks:

  • Cutting and trimming siding panels using power saws, circular saws, or hand tools, which generated respirable asbestos-containing dust
  • Nailing and fastening operations, during which mechanical impact could fracture panel edges and release fibers
  • Handling and stacking raw panels on job sites, particularly where panels were damaged, chipped, or broken during transport and staging
  • Sanding and surface preparation of installed siding prior to painting or finishing
  • Demolition and removal of previously installed asbestos-containing siding during renovation, remediation, or building teardown projects

Renovation and demolition workers face particular exposure concerns because aging asbestos-containing siding may become increasingly friable over time, especially when weathered, mechanically damaged, or subjected to freeze-thaw cycling. Workers removing old siding as part of remodeling projects may encounter materials in deteriorated condition that release fibers more readily than newly manufactured panels.

Industrial workers generally — the trade category specifically associated with this product — encompass a broad population including general laborers, construction workers, maintenance personnel, and building trades workers who may have encountered Classic Shake Siding in new construction, renovation, or demolition contexts across many decades of building activity.

Bystander exposure is also relevant to the litigation history of asbestos-containing siding products. Other trades working on the same job site — electricians, plumbers, roofers, and general laborers — could be exposed to airborne fibers generated by siding installation or removal activities occurring nearby, even if they were not directly involved in siding work.

Family members of workers who handled asbestos-containing materials have also been recognized in litigation as potential secondary exposure claimants, based on allegations that asbestos fibers were carried home on work clothing, tools, and equipment.

Classic Shake Siding manufactured by National Gypsum Co is classified as a Tier 2 litigated product, meaning that legal claims associated with this product are pursued through civil litigation rather than through an established asbestos bankruptcy trust fund.

No active bankruptcy trust fund has been identified for National Gypsum Co in connection with this product. Individuals who were exposed to Classic Shake Siding and subsequently developed asbestos-related diseases may have legal recourse through direct litigation against responsible parties.

Litigation records document that plaintiffs have alleged injury from exposure to National Gypsum Co products, asserting claims that include negligence, failure to warn, strict products liability, and related theories. Plaintiffs alleged that the company knew or should have known of the hazards associated with asbestos-containing products and failed to provide adequate warnings to workers and end users.

Asbestos-related diseases recognized in this litigation context include:

  • Mesothelioma — an aggressive cancer of the pleural or peritoneal lining strongly associated with asbestos exposure
  • Asbestos-related lung cancer — particularly in individuals with documented occupational asbestos exposure
  • Asbestosis — progressive fibrotic lung disease resulting from accumulated asbestos fiber deposition
  • Pleural diseases — including pleural plaques, pleural thickening, and pleural effusion

Individuals diagnosed with these conditions who have a documented occupational history involving Classic Shake Siding or other National Gypsum Co products should consult with an attorney experienced in asbestos litigation. Legal professionals specializing in this field can evaluate exposure history, assess applicable statutes of limitations, identify all potentially responsible parties across a claimant’s full occupational history, and determine the appropriate legal venues for pursuing compensation.

Because asbestos-related diseases often develop decades after initial exposure, claims may involve products and manufacturers across multiple employers and job sites throughout a worker’s career. A comprehensive exposure history is essential to building an effective legal claim.