Armstrong World Industries

Company History

Armstrong World Industries traces its origins to 1860, when Thomas Morton Armstrong founded a small cork-cutting shop in Lancaster, Pennsylvania. Over the following century, Armstrong grew into one of the largest flooring and building-materials manufacturers in the United States, eventually expanding its product lines to include resilient floor tile, acoustic ceiling systems, and industrial insulation products.

Throughout the mid-twentieth century, Armstrong incorporated chrysotile and other forms of asbestos into a wide range of its building products. Asbestos was prized by manufacturers of this era for its fire resistance, tensile strength, and dimensional stability — properties that made it particularly attractive for floor tile binders, acoustic ceiling panels, and pipe insulation formulations. Armstrong used asbestos in these applications from at least the 1940s through 1983, when the company ceased incorporating asbestos into new product lines.

By the time asbestos-related disease litigation began accelerating in the 1970s and 1980s, Armstrong faced a substantial volume of personal injury claims tied to occupational and residential exposures to its products. On December 6, 2000, Armstrong World Industries filed for Chapter 11 bankruptcy protection in the United States Bankruptcy Court for the District of Delaware. The reorganization plan ultimately established the Armstrong World Industries Asbestos Personal Injury Trust, which continues to process and pay claims from individuals who were exposed to Armstrong asbestos-containing products and subsequently developed asbestos-related diseases.

Asbestos-Containing Products

Armstrong manufactured three major categories of asbestos-containing building products that were distributed and installed across the United States from the 1940s through the early 1980s.

Excelon Vinyl Asbestos Floor Tile

Armstrong’s Excelon line was among the most widely distributed vinyl asbestos tile (VAT) products ever sold in the American market. Excelon tiles typically contained between 14 and 21 percent chrysotile asbestos by weight, bound within a polyvinyl chloride (PVC) matrix. The tiles were manufactured in standard 9-inch and 12-inch square formats and were sold in a broad range of colors and patterns intended for both residential and commercial applications.

Excelon vinyl asbestos tile was installed in millions of homes, schools, hospitals, office buildings, and retail spaces across the United States during its production run. The product was marketed through flooring contractors, home improvement retailers, and building supply distributors, making it one of the most pervasive asbestos-containing materials in the American built environment.

Asbestos fibers in Excelon tile remain largely bound within the PVC matrix when the tile is intact and undisturbed. However, cutting, sanding, scraping, or otherwise disturbing the tile — as occurs during installation, removal, or renovation — can release respirable asbestos fibers into the air.

Medintone Acoustic Ceiling Tile

Armstrong’s Medintone line was a commercially oriented acoustic ceiling tile product used extensively in offices, schools, hospitals, and other institutional buildings. Medintone tiles contained asbestos as a reinforcing and fire-resistant component within the tile’s mineral fiber matrix. These tiles were a standard specification item in commercial construction projects from the 1950s onward.

Like vinyl asbestos floor tile, intact Medintone ceiling tiles pose limited fiber-release risk when left undisturbed. Drilling, cutting, or removing the tiles — particularly during building renovations or HVAC work — could generate airborne asbestos dust. Workers involved in the installation, maintenance, or demolition of suspended ceiling systems containing Medintone tiles were subject to potential fiber exposure.

Armstrong Pipe Insulation and Block

Armstrong also manufactured asbestos-containing pipe insulation and block insulation products used in commercial and industrial settings. These products were applied to steam lines, hot-water pipes, boilers, and other high-temperature systems in power plants, shipyards, refineries, manufacturing facilities, and large institutional buildings.

Pipe insulation and block products of this era frequently contained 15 to 30 percent or more asbestos by weight, typically in the form of chrysotile, amosite, or both. This category of product is associated with some of the highest occupational exposure levels documented in asbestos litigation, as insulation work routinely involved sawing, fitting, and applying friable materials in enclosed spaces with limited ventilation.

Occupational Exposure

Workers across a broad range of trades and industries encountered Armstrong asbestos-containing products during the decades of heaviest use.

Flooring installers and floor tile mechanics were among the most directly exposed groups. Cutting Excelon vinyl asbestos tile to fit room dimensions — using hand-scored cutters, power saws, or tile nippers — generated asbestos-laden dust. Scraping adhesive residue from subfloors and removing old tile during renovation work created additional exposure opportunities, often in residential settings with no ventilation controls.

Carpenters and general laborers involved in commercial interior fit-out work frequently handled both vinyl asbestos tile and acoustic ceiling products. Drilling holes in ceiling tiles for lighting fixtures, cutting panels to accommodate HVAC registers, or demolishing existing suspended ceilings during renovation all represented potential exposure events.

Pipefitters, plumbers, steamfitters, and insulators who worked alongside or directly applied Armstrong pipe insulation and block products faced elevated exposure risk. These trades operated in environments — engine rooms, boiler rooms, utility tunnels, and mechanical spaces — where asbestos insulation work was performed in close proximity to other workers, compounding cumulative exposure for everyone in the area.

Building maintenance workers and custodial staff in facilities where Armstrong products had been installed also faced ongoing exposure risk, particularly when performing repairs, modifications, or cleaning in areas with deteriorating ceiling tile or damaged floor tile.

Residential exposure is a documented concern as well. Homeowners and family members who were present during do-it-yourself floor tile installation or removal using Excelon products — or who lived in homes where such work was performed — may have experienced secondary asbestos exposure.

The latency period for asbestos-related diseases — the time between initial fiber exposure and disease onset — typically ranges from 10 to 50 years. Mesothelioma, lung cancer, asbestosis, and pleural disease are among the conditions associated with asbestos exposure. Individuals who worked with or around Armstrong products in the 1940s through early 1980s may only now be receiving diagnoses.

Armstrong World Industries Asbestos Personal Injury Trust

Following Armstrong World Industries’ Chapter 11 bankruptcy filing in December 2000, the company’s reorganization plan established the Armstrong World Industries Asbestos Personal Injury Trust. This trust is the primary mechanism through which individuals injured by Armstrong asbestos-containing products can seek compensation, and it continues to accept and process claims.

The trust covers personal injury claims arising from exposure to asbestos-containing products for which Armstrong World Industries bears legal responsibility. Eligible disease categories under the trust’s procedures generally include mesothelioma, lung cancer, other asbestos-related cancers, asbestosis, and diffuse pleural thickening, with payment values and documentation requirements varying by disease tier.

To file a claim with the Armstrong World Industries Asbestos PI Trust, claimants typically must provide:

  • Medical documentation confirming an asbestos-related diagnosis (pathology reports, imaging studies, and/or physician statements)
  • Exposure history demonstrating contact with Armstrong-manufactured asbestos products (work records, product identification, co-worker affidavits, or union records)
  • Personal identification and, in wrongful death cases, documentation establishing the claimant’s relationship to the deceased

Claims are processed according to the trust’s Trust Distribution Procedures (TDP), which establish scheduled payment values for each disease category and specify the evidentiary requirements for both expedited and individual review claim pathways.

Working with an Attorney

Individuals and families pursuing claims against the Armstrong trust are strongly encouraged to work with an attorney who has experience in asbestos litigation and trust fund claims. Asbestos trust claims involve specific procedural requirements, statute of limitations considerations, and documentation standards that vary by disease category and claimant circumstance. An experienced attorney can help gather exposure records, coordinate medical documentation, and ensure that claims are filed correctly and within applicable deadlines.

It is also worth noting that individuals exposed to Armstrong products may have exposure histories involving other manufacturers as well. Many asbestos trust funds can be accessed simultaneously, and a qualified attorney can evaluate whether claims against other trusts or defendants may also be appropriate.

Summary

Armstrong World Industries manufactured asbestos-containing floor tile, acoustic ceiling tile, and pipe insulation products from at least the 1940s through 1983. Its Excelon vinyl asbestos tile was installed in millions of American homes and commercial buildings. Following bankruptcy in 2000, Armstrong established the Armstrong World Industries Asbestos Personal Injury Trust, which remains active and compensates individuals diagnosed with mesothelioma, lung cancer, asbestosis, and related diseases caused by exposure to Armstrong products. Workers in flooring, construction, pipefitting, and building maintenance trades — as well as household members who encountered disturbed tile during home renovation — may be eligible to file a trust claim. Consulting an asbestos attorney is the recommended first step toward understanding eligibility and initiating the claims process.