stockrowWhat it does
Armstrong World Industries designs, manufactures and sources ceilings, specialty walls and exterior metal products. Its products are used mainly in commercial buildings, including offices, schools, healthcare facilities, transportation buildings and retail spaces. A smaller portion is used in homes.
The company sells suspended ceiling panels made from mineral fiber and fiberglass, as well as the supporting metal grid and other components that hold ceiling systems in place. Its products can provide acoustical control, fire protection and energy efficiency as well as a finished appearance. Armstrong also offers specialty ceilings and walls in materials such as metal, felt, wood, resin and glass. These can be standard products or customized for a particular project.
Armstrong principally sells commercial products to building materials distributors, which resell them to contractors and other customers. It also sells to ceiling contractors, home centers and other direct customers. Its design and sales teams work with architects and general contractors to get its products included in building specifications.
The business was founded in 1860 and the Pennsylvania corporation was incorporated in 1891. Its headquarters are in Lancaster, Pennsylvania. Mark Hershey is chief executive officer. Armstrong had approximately 3,800 employees at the end of 2025.
How it makes money
Armstrong earns revenue by selling building products through two operating segments. In FY2025, Mineral Fiber revenue was $1.0 billion and Architectural Specialties revenue was $590.1 million. In the third quarter of 2026, company net sales increased 12% from the prior-year quarter.
Mineral Fiber makes suspended mineral fiber and fiberglass ceilings. Its results also include Armstrong’s 50% equity interest in Worthington Armstrong Venture, or WAVE, a joint venture with Worthington Enterprises that makes ceiling grids and components. For some customers, WAVE sells grid products to Armstrong for resale. Armstrong estimates that a majority of Mineral Fiber commercial construction sales are used in existing-building renovations, including replacement of old products.
Architectural Specialties designs, manufactures and sources specialty ceilings, walls and exterior products, primarily for commercial buildings. It sells to ceiling contractors and distributors, with revenue driven mainly by individual projects. Armstrong estimates that a majority of this segment’s commercial construction sales are used in new buildings. Project timing can therefore make its sales patterns variable.
Prices vary by product design, style and performance. Mineral Fiber tracks sales dollars per unit, a measure affected by both like-for-like pricing and the mix of products sold. Architectural Specialties prices much of its portfolio by project; custom-project prices can remain fixed until quotes expire or price escalators apply.
Renovation and replacement provide continuing sources of demand, alongside new construction, but Armstrong primarily sells products rather than subscriptions. Sales have historically tended to be stronger in the second and third quarters, reflecting weather, customer cycles and construction timing.
| Segment | Revenue, FY2025 | Share | Change on the year |
|---|---|---|---|
| Mineral Fiber | $1.0 billion | 63.6% | 4.53% |
| Architectural Specialties | $590.1 million | 36.4% | 28.4% |
Customers and how it sells
Armstrong primarily serves the United States, Canada and Latin America. Most of its revenue comes from commercial construction sectors such as offices, education, healthcare, transportation and retail. The company sells into both new construction and renovation, as well as a smaller residential market.
Building materials distributors accounted for approximately 63% of consolidated net sales in 2025, while home center customers accounted for nearly 7%. Other sales were primarily to direct customers, independent retailers, national accounts and online customers. Distributors resell products to contractors and other buyers; Armstrong also works directly with architects, design firms and general contractors during project specification.
Lowe’s Companies, including Foundation Building Materials, and The Home Depot, including GMS, each accounted for more than 10% of consolidated gross sales in 2025. Their combined gross sales were $937.8 million. Both customer groups bought products from both operating segments.
Armstrong generally produces goods for inventory and sells on credit. It says distributors and home centers carry inventory as needed for local or rapid delivery. The company operated 22 manufacturing plants at December 31, 2025, including 19 in the United States and three in Canada; WAVE operated seven additional U.S. plants.
| Segment | Revenue, FY2025 | Share | Change on the year |
|---|---|---|---|
| Mineral Fiber | $1.0 billion | 63.6% | 4.53% |
| Architectural Specialties | $590.1 million | 36.4% | 28.4% |
Suppliers and costs
Armstrong buys raw materials from numerous suppliers. Its principal materials include fiberglass, perlite, recycled paper and starch; it also uses materials such as felt, resin, wood and wood fiber. Armstrong makes most of the mineral wool it needs at one of its facilities. It and WAVE use aluminum and steel to make metal products.
The company also purchases packaging and consumes electricity, natural gas and water. Operating expenses include materials, labor, energy, manufacturing overhead, freight, purchased products, tariffs and selling and administrative costs. Some specialty ceilings and exterior metal products are sourced from third parties, including suppliers in Europe and the Pacific Rim. Sourced products represented less than 10% of consolidated revenue in 2025.
Armstrong says material availability can be disrupted by transportation, regulations, competing demand or supplier events. Prices can fluctuate, including because of tariffs, and competitive conditions may prevent it from passing all cost increases to customers. In the third quarter of 2026, freight and raw material costs accelerated, while fixed project quotes could delay the effect of pricing actions.
- Revenue$1.6B
- Cost of revenue−$962.1M
- Selling, general and administrative−$339.5M
- Other operating costs−−$111.7M
- Operating income$430.9M
Competitive position
Armstrong competes with domestic and international suppliers of mineral fiber and fiberglass ceilings, specialty ceilings and exterior metal products. Some ceiling products also compete with drywall and exposed structures. Customers consider performance, appearance, service and price; excess capacity in certain products can increase price competition.
The company names CertainTeed, Chicago Metallic, Rockfon, USG, Ceilings Plus, Rulon International, SAS International and 9Wood as primary competitors. Its products are sold through distributors and specified by architects and other project participants. Armstrong’s sales and design teams work with those participants to put its products into project plans.
Our reading: Distributor relationships and early work with designers can support Armstrong’s position, but competing suppliers and alternative finishes limit the protection they provide. Its portfolio spans several materials and includes customized products, giving customers options within one supplier’s range.
Armstrong holds patents, trademarks, designs, trade secrets and other intellectual property. It considers those rights collectively important but says it is not materially dependent on any single right. Our reading: The combination of brand recognition, design capabilities and intellectual property offers some differentiation, rather than protection from price competition across the market.
WAVE supplies grid and ceiling components that Armstrong can sell alongside its ceiling panels. Our reading: The joint venture supports a more complete system offering, although the available evidence does not establish how difficult that offering is for competitors to match.
| Competitor | Where they compete | Threat (our reading) |
|---|---|---|
| CertainTeed Corporation | Ceilings and architectural products | Medium |
| Chicago Metallic Corporation | Ceilings and architectural products | Medium |
| Rockfon A/S | Ceilings and architectural products | Medium |
| USG Corporation | Ceilings and architectural products | Medium |
| Ceilings Plus | Ceilings and architectural products | Medium |
| Rulon International | Ceilings and architectural products | Medium |
| SAS International | Ceilings and architectural products | Medium |
| 9Wood | Ceilings and architectural products | Medium |
Growth opportunities
Armstrong’s strategy includes strengthening Mineral Fiber and expanding Architectural Specialties into adjacent categories through product development, investment and acquisitions. Its product work includes energy-saving Templok ceiling tiles and acoustical products. The company also uses digital tools to support renovation and design activity.
Architectural Specialties acquired Geometrik, a wood acoustical ceiling and wall system manufacturer, and Parallel, an exterior aluminum products manufacturer, in 2025. Armstrong acquired Eventscape in February 2026. In the third quarter of 2026, the segment’s net sales increased 22%, including 16% organic growth; recent acquisitions also contributed. Armstrong said Parallel was ramping more slowly than expected because of operational throughput and related challenges.
Armstrong is developing sales to data centers with ceilings and DYNAMAX structural grid. It said both product categories’ data center sales had exceeded their full-year revenue plans through the third quarter of 2026. It also introduced the SKYLO walkable ceiling system and won an order for an advanced manufacturing research facility.
Its Kanopi e-commerce platform and ProjectWorks design platform are intended to reach customers and support project design. The company said Kanopi had double-digit revenue and Mineral Fiber volume growth year to date through the third quarter of 2026. For full-year 2026, Armstrong expects total company net sales growth of 10%-11% and continues to target a 20% Architectural Specialties adjusted EBITDA margin as it integrates and scales acquisitions.
- $1.1BFY2021
- $1.2BFY2022
- $1.3BFY2023
- $1.4BFY2024
- $1.6BFY2025
Structural risks
- Customer concentration: Changes in relationships with major customers or fluctuations in their sales could adversely affect Armstrong. Lowe’s and Home Depot each exceeded 10% of consolidated gross sales in 2025.
- Construction demand: Economic weakness and tighter credit can cause customers to postpone spending. Armstrong’s new-construction revenue can lag construction starts, and project-driven Architectural Specialties sales can vary in timing.
- Costs and pricing: Raw material, energy and freight costs can rise, including because of tariffs. Competition can limit price recovery, while custom-project quotes can delay the effect of price increases.
- Supply and operations: Material or sourced-product availability can change because of transportation disruptions, regulation or supplier events. Extreme weather can also affect facilities, shipments and customer construction activity.
- Strategy and acquisitions: Product innovation and digital investments may not deliver anticipated benefits. Armstrong has said Parallel is ramping more slowly than expected as it works on operating throughput.
- Debt and legal matters: Indebtedness can limit flexibility and the ability to borrow or invest. Regulatory actions, environmental claims, product claims and other litigation could be costly.
Bottom line
Our reading
Our reading: Armstrong combines a renovation-oriented ceiling business with a more project-driven specialty products business, using distribution relationships and design capabilities to reach commercial construction customers. Its expansion into adjacent products and data centers adds opportunities, while customer concentration, construction cycles and the lag between cost increases and project pricing remain important exposures. Recent acquisition integration adds another operating challenge.