RoofTG (formerly AHI Roofing) is a

manufacturer Manufacturing is the creation or production of goods with the help of equipment, labor, machines, tools, and chemical or biological processing or formulation. It is the essence of secondary sector of the economy. The term may refer to ...

of stone chip coated

metal roof A metal roof is a roofing system made from metal pieces or tiles characterized by its high resistance, impermeability and longevity. It is a component of the building envelope. Zinc, copper and steel alloys are commonly used. History Copper has pla ...

tiles based in

Auckland Auckland (pronounced ) ( mi, Tāmaki Makaurau) is a large metropolitan city in the North Island of New Zealand. The most populous urban area in the country and the fifth largest city in Oceania, Auckland has an urban population of about ...

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...

and with plants in

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

(

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

Hungary Hungary ( hu, Magyarország ) is a landlocked country in Central Europe. Spanning of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the ...

and

Malaysia Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...

. The company sells under both the Gerard and Decra brand names.

History

Product development

AHI Roofing was created when Lou Fisher produced the world's first steel tile. Today AHI Roofing does business in over eighty countries worldwide in steel roof tiles. It was a world shortage of oil-based paint that began the coated steel tile story. In 1947, many large ironclad buildings in Britain were coated with a bituminous emulsion. It proved to be extremely tough and protective, adding to the life of the cladding. The first coated metal roofing tiles to be made in New Zealand were produced by Martile Roofing Ltd in Howick in 1956 and were pressed from an aluminium manganese alloy. They were then coated with High Bake Enamel. By 1957, L.J. Fisher had bought the rights to use the Martile profile from A.L.W. Martinsen and Son Ltd and was producing his own tile. Part of the condition of the rights purchase was that Fisher’s four-pan tile with its bitumastic emulsion coating was to be made from galvanised steel, thereby ensuring a different product. He formed LJ Fisher & Co. Ltd. (LJF) in 1957. In 1969, LJF merged with Alex Harvey & Sons and the New Zealand activities of Australian Consolidated Industries, forming Alex Harvey Industries (AHI), with AHI Roofing Pty Ltd being its subsidiary. Returning to Auckland from the UK in 1957, Fisher started producing coated and chipped panels from galvanised steel for roofing and cladding. Originally the natural stone chips were added to prevent panels sticking together during transportation. However their attractive appearance quickly became a product feature customers demanded. Fisher also experimented with crushed shells and bricks before natural stone chips became the top choice for their aesthetics and durability.Kate Hill. The History of Metal Tiles. Publication.

International market expansion

AHI expanded sales rapidly in the 1970s and 1980s. It was not until 1990 that a competitor made it to market called Metrotile (NZ) Ltd with a similar steel tile. AHI’s coated steel tiles were the first major innovation in residential roofing for more than thirty years. The new roofing material quickly became the choice of architects and major construction companies throughout New Zealand. AHI entered the European market in the 1970s. AHI’s earliest acrylic coated tiles have been used in the harsh winters of Canada from the 1970s and in Scandinavia from the 1980s. The growing success of metal tile technology as an export product resulted in the commissioning of new manufacturing plants under licence, in Denmark, Malaysia and the United States by the late 1980s. It was during this period that the company moved to acrylic coating technology (for improved chip adhesion) and launched the Colortile product on the New Zealand market. The Gerard worldwide operation (excluding the United States) was purchased by

Carter Holt Harvey __NOTOC__ Carter Holt Harvey Limited is a privately-owned New Zealand-based company controlled by Rank Group Limited, the corporate vehicle of the country's richest man, Graeme Hart. Based in Auckland, New Zealand, the company has three main div ...

in 1989 and the CoronaShake product was launched in 1992 and Oberon in 1995. The company is now owned by Fletcher Building. and sells product in over 120 countries.

International offices

Timeline

*1940 - During

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...

, bitumen paint-protected iron cladding was used in the UK *1954 - Lou Fisher observed the bitumen coating process. *1957 - The first Fisher tile was manufactured in Auckland. (The world's first steel roof tile) *1964 - 10-Pan Harvey tile was developed. *1967 - 'Improved' interlocking profile developed. *1960-70 - Stone chips refined; overglaze added. *1970s - Exports to Europe, licensed manufacture in Belgium 1979 and Denmark in 1981. *1980 - Acrylic coatings introduced, improving durability. *1980s - Exports to Asia, licensed manufacture in Malaysia 1985. *1989 - Gerard operations (outside USA) purchased. *1989 - USA plant established - Corona, California *1981-94 - Export Offices in Canada 1981,. Australia 1989, Central Europe 1991,

Persian Gulf The Persian Gulf ( fa, خلیج فارس, translit=xalij-e fârs, lit=Gulf of Fars, ), sometimes called the ( ar, اَلْخَلِيْجُ ٱلْعَرَبِيُّ, Al-Khalīj al-ˁArabī), is a mediterranean sea in Western Asia. The bod ...

1993, Japan 1994, Hong Kong 1998, Turkey 1999, Slovenia 2000, Poland 2001, France 2004. *1995 - Zincalume Steel substrate replaces galvanized steel, further extending product life. *1988 - Purchased by Tasman Building Products, renamed AHI Roofing. *2003 - Purchased by Fletcher Building. *2005 - Purchased Plant of former licensee in Malaysia. *2009 - New plant starts to operate in Hungary.

Production

AHI Roofing chip-coated, pressed metal roofing tiles are made from steel that is manufactured by

New Zealand Steel New Zealand Steel Limited is the owner of the Glenbrook Steel Mill, the steel mill located 40 kilometres south of Auckland, in Glenbrook, New Zealand. The mill was constructed in 1968 and began producing steel products in 1969. Currently, the ...

from black iron sand, found on the West Coast beaches of the North Island. The steel is coated with zinc/aluminium alloy (Zincalume). The main component of the paint system is

acrylic resin 186 px, Polyhydroxyethylmethacrylate is a typical acrylate resin. An acrylic resin is a thermoplastic or thermosetting plastic substance typically derived from acrylic acid, methacrylic acid and acrylate monomers such as butyl acrylate and or ...

, produced in New Zealand. The coatings are water-based or water dispersed. The “chip” used to coat the textured roofing tiles is crushed natural rock quarried in New Zealand.

References

External links

Metal Roofing Alliance's photostream
{{DEFAULTSORT:Ahi Roofing Building materials companies Manufacturing companies of New Zealand New Zealand brands