Permasteelisa
Permasteelisa is an Italian architectural-envelope and interior-systems company specializing in engineered curtain walls, building façades, project management, manufacturing, and installation.
Last updated August 25, 2026
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Overview
Permasteelisa S.p.A. is an Italian engineering and construction-services company focused on architectural envelopes and interior systems for complex buildings. Its principal capability is the design, engineering, manufacture, project management, and installation of curtain-wall and other external-cladding systems. These systems form the weatherproof and visual outer skin of buildings and are used in projects where large areas of glass, metal, stone, or composite materials must be integrated with demanding structural, environmental, and aesthetic requirements. The company began in 1973 as Infissi Serramenti Alluminio, commonly abbreviated as ISA. Its international identity emerged after the 1986 acquisition of Australian manufacturer Permasteel Industries Pty Ltd, a company associated with the curtain-wall work for the Sydney Opera House. Following that acquisition, ISA adopted the Permasteelisa name and began expanding beyond Italy. Its initial Asian expansion included Singapore and Hong Kong, followed by operations or investments in Japan, China, Thailand, and Malaysia. Permasteelisa subsequently broadened its technical and geographic platform through acquisitions. In 1994 it acquired Dutch façade specialist Scheldebouw B.V., and in 2001 it acquired German company Josef Gartner GmbH. The group also established a presence in the United States during the late 1990s, initially through interiors fit-out activities and later through investment in the North American curtain-wall market. This combination of local subsidiaries, manufacturing facilities, engineering offices, and research and development centers enabled Permasteelisa to work as a distributed international contractor rather than as a single-site manufacturer. The company's work has been associated with prominent airports, skyscrapers, cultural buildings, and other large-scale structures. Examples identified in reference material include the Sydney Opera House, the Guggenheim Museum Bilbao, and The Shard in London. Such projects illustrate Permasteelisa's positioning as a specialist partner for architecturally distinctive and technically demanding building envelopes rather than as a mass-market building-products brand. The Permasteelisa Group has been described as a relatively compact multinational, with approximately 3,900 employees and a network of about 40 companies, including offices, plants, and research and development centers in roughly 30 countries. Its activities have historically been organized around three broad areas: Exteriors, covering curtain walls and related façade systems; Interiors, covering interior fit-out and architectural interior systems; and Contract activities. In 2015, the Exteriors business accounted for approximately 84.5 percent of group turnover, Interiors for approximately 12.7 percent, and Contract activities for approximately 2.8 percent. Ownership changed several times in the 2010s. In 2011, Japanese building-products group LIXIL acquired Permasteelisa for a reported €575 million. A proposed sale to Chinese interior-design company Grandland was blocked by the United States government in 2018 on national-security grounds, although the publicly described material does not specify the precise concerns behind the decision. In May 2020, Permasteelisa was sold to Atlas Holdings, an American industrial investment firm. The company remains active as an international specialist in building façades, curtain walls, interior systems, and related project delivery.
History
Permasteelisa traces its origins to 1973, when it was established in Italy under the name Infissi Serramenti Alluminio, or ISA. The original business was connected with aluminum window and façade systems. Its later development was shaped by the growing use of engineered curtain walls in large commercial, cultural, and transportation buildings, where façades require coordinated structural design, fabrication, glazing, logistics, and installation. A decisive transition occurred in 1986, when ISA acquired Australian company Permasteel Industries Pty Ltd. The acquired company was associated with manufacture of the curtain wall for the Sydney Opera House. After the transaction, ISA changed its name to Permasteelisa. The new identity reflected both the acquisition and a strategic move toward international façade contracting. Expansion first reached Singapore and Hong Kong, and subsequently extended into Japan, China, Thailand, and Malaysia. Permasteelisa continued its internationalization through acquisitions in Europe. In 1994 it purchased Scheldebouw B.V. in the Netherlands, strengthening its façade engineering and manufacturing presence. In 2001 it acquired Josef Gartner GmbH in Germany, adding another established specialist in architectural envelopes. The group also entered the United States at the end of the 1990s. Its initial American activity focused on interiors fit-out before the company expanded its investment in the U.S. curtain-wall market. The resulting organization operated as a network of companies, offices, production sites, and research and development centers. This structure supported projects in multiple regions while retaining specialist capabilities in façade design, engineering, manufacturing, and installation. Permasteelisa became associated with prominent buildings, including the Sydney Opera House, the Guggenheim Museum Bilbao, and The Shard in London. Its work also extended to airports, skyscrapers, and other buildings requiring extensive continuous external cladding. By 2015, the group described its business through Exteriors, Interiors, and Contract activities. Exteriors was by far the largest segment, representing approximately 84.5 percent of turnover, while Interiors represented approximately 12.7 percent and Contract activities approximately 2.8 percent. The group reported approximately 3,900 employees and a network of about 40 companies in 30 countries, illustrating its position as a relatively compact but geographically broad multinational. Ownership changed during a period of consolidation in the building-products and construction-services sectors. In 2011, LIXIL acquired Permasteelisa for a reported €575 million. In 2018, the United States blocked a proposed sale to Chinese interior-design company Grandland on national-security grounds. The available reference material does not explain the underlying security concerns. In May 2020, Permasteelisa was sold to Atlas Holdings, an American investment firm. Under Atlas ownership, the company continued operating as a specialist provider of architectural envelopes, curtain walls, façade systems, interior systems, and related engineering and project-delivery services.
- 2020
Sold to Atlas Holdings
[1]Atlas Holdings acquired Permasteelisa from its Japanese owner in May 2020.
- 2018
Proposed Grandland transaction blocked
[1]The United States blocked a proposed acquisition by Chinese company Grandland on national-security grounds.
- 2011
Acquired by LIXIL
[1]Japanese building-products group LIXIL acquired Permasteelisa in a transaction reported at approximately €575 million.
- 2001
Acquisition of Josef Gartner
[1]The group acquired German company Josef Gartner GmbH, adding another established architectural-envelope business to its international network.
- 1994
Acquisition of Scheldebouw
[1]Permasteelisa acquired Dutch company Scheldebouw B.V., expanding its European façade capabilities.
- 1986
Acquisition of Permasteel Industries
[1]ISA acquired Australian company Permasteel Industries Pty Ltd and subsequently adopted the Permasteelisa name.
- 1973
Company founded as Infissi Serramenti Alluminio
[1]The Italian company that later became Permasteelisa was founded under the name Infissi Serramenti Alluminio, commonly known as ISA.
Products and positioning
A specialist international engineering and project-delivery partner for complex architectural envelopes, curtain walls, façades, and interior systems. Permasteelisa competes through technical design capability, manufacturing and installation capacity, international project coordination, and experience with architecturally prominent buildings.
Architectural envelope
Curtain-wall systems
Engineered external wall systems used to enclose large buildings while integrating glazing, metal framing, cladding, weather protection, and structural interfaces. Curtain walls are the company's principal activity and are designed for complex projects such as skyscrapers, airports, cultural buildings, and other large public or commercial structures.
Façade systems
External cladding systems
Continuous external cladding and related façade assemblies that provide a building's visible outer skin. Permasteelisa supplies the engineering, production, coordination, and installation capabilities needed to deliver large and architecturally distinctive envelopes.
Architectural interiors
Interior systems and fit-out
Interior architectural systems and fit-out services for major commercial, public, and specialist buildings. The company entered the United States initially through interiors fit-out before developing a larger curtain-wall presence there.
Construction and engineering services
Engineering and project delivery
Integrated engineering, project management, manufacturing, logistics, and installation services for building envelopes and interiors. These services allow Permasteelisa to coordinate design intent, fabrication, procurement, and construction-site execution across international projects.
Brand decisions
2020
Sale to Atlas HoldingsM&ABackground
Following the unsuccessful proposed Grandland transaction, Permasteelisa remained under Japanese ownership until a subsequent divestment.
Action taken
Atlas Holdings acquired Permasteelisa in May 2020.
Aftermath
The company continued as an active international architectural-envelope and interior-systems business under American ownership.
2018
Proposed sale to Grandland blockedM&ABackground
LIXIL pursued a proposed sale of Permasteelisa to Chinese interior-design company Grandland.
Action taken
The United States blocked the proposed acquisition on national-security grounds.
Aftermath
The proposed transaction did not proceed. The available reference does not identify the specific security concerns or provide further details about the review.
2011
Sale to LIXILM&ABackground
Permasteelisa had developed into an international specialist in curtain walls, façades, and interior systems.
Action taken
LIXIL acquired Permasteelisa for a reported €575 million.
Aftermath
Permasteelisa became part of the Japanese building-products group.
Reported acquisition value. €575 million (2011 transaction)
1986
Acquisition of Permasteel Industries and adoption of the Permasteelisa nameM&ABackground
ISA sought to develop an international position in architectural envelopes and acquired Australian curtain-wall manufacturer Permasteel Industries Pty Ltd.
Action taken
The acquisition was completed, and ISA changed its corporate name to Permasteelisa.
Aftermath
The transaction became the foundation for the company's expansion into Asia and its later multinational operating structure.
Sources1 sources
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