PART FOUR

Sheet-Copper Facts

   Copper is an excellent material for general sheet-metal purposes — particularly for roofing, eaves troughs, gutters, leaders, flashings, ridge rolls, ridge caps, leader heads, cornices, etc.

   Its physical and chemical characteristics make it an outstanding metal for long service under severe conditions.

   As there are practically no maintenance costs its service value increases with age. It has a high salvage value.

DURABILITY

   A copper roof will last for generations, probably for centuries. Numerous important buildings, as well as many fine residences, in the United States have copper roofs, some of them over 100 years old; in Europe and Asia are other examples which have lasted for centuries.

   Perhaps the oldest copper work in the world which is still in use is the Dragon weathervane on the Beffroi in Ghent, Belgium. This was erected in 1377 and is 548 years old.

   The following is a partial list of copper roofs on prominent buildings located all over the world. Except in one case, St. Peter's Church in Rome, all of these roofs are in use today.

Building: Nagova Temple, Japan  Date: 1411  Age: 514

Building: Temple of Heaven, Peking  Date: 1420  Age: 505

Building: St. Peter's Church, Rome (Valleys and Decks) Date: 1503-1882 Age: 379

Building: Bourse, Copenhagen, Denmark (Tower)  Date: 1619  Age: 306

Building: Kronberg Castle, Helsingfors, Finland  Date: (Circa) 1635  Age: 290

Building: Christ Church, Philadelphia, Pa  Date: 1758  Age: 167

Building: Customs House, Dublin, Ireland (Dome)  Date: 1791  Age: 134

Building: Drottningholm Castle, Lake Malar, Sweden  Date: (Circa) 1800  Age: 125

Building: Chartres Cathedral, Chartres, France  Date: 1836  Age: 89

Building: Dome of Capitol, Jackson, Miss.  Date: 1839  Age: 86

Building: York Minster, York, England  Date: 1842  Age: 83

Building: Madeline Church, Paris, France  Date: 1842  Age: 83

Building: Trinity Church, New York, N. Y.  Date: 1846 Age: 79

Building: Dome of Capitol, Boston, Mass.   Date: 1855  Age: 70

Building: Dome of British Museum, London, England  Date: 1857  Age: 68

Building: Opera House, Paris  Date: 1865  Age: 60

Building: Pulitzer Building, New York, N. Y.   Date: 1889  Age: 36

Building: Gripsholm Castle, Lake Malar, Sweden  Date: 1889  Age: 36

Building: Chateau Frontenac, Quebec, Canada  Date: 1891  Age: 34

Building: Temple Beth-el, New York, N. Y.   Date: 1892  Age: 33

Building: Tower, Hackley School, Tarrytown, N. Y.  Date: 1900  Age: 25

Building: West Street Building, New York, N. Y.  Date: 1906  Age: 19

Building: Cathedral of St. John the Divine, New York, N. Y.  Date: 1907  Age: 18

Building: Grand Central Terminal, New York, N. Y.  Date: 1912  Age: 13

Building: Woolworth Building, New York, N. Y.   Date: 1912  Age: 13

   Copper retards appreciably the corrosive action of acid fumes, and is a most effective material for use under extreme atmospheric conditions such as are found in manufacturing localities and cities. Near the sea coast and in country districts its durability is unquestioned.

APPEARANCE

   The green coating or patina which appears on copper after exposure to the atmosphere not only acts as a shield against deterioration, but also makes it a most beautiful roofing material. It does not require painting or special protective treatment of any kind.

WEIGHT

The non-corrosive properties of copper make it possible to use a thin sheet, and its comparative lightness permits its use in construction work without the necessity of heavy supporting structures. It is one of the lightest of roofings.

   The weights of various roofing materials per square (1OO square feet) on the roof are as follows:

- 24 -