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Tuesday, March 8, 2011

Copper Cladding, Cupola, Finial and Steeple Specialist ǀ by CIS Steeplejack


CIS Nationwide Steeplejack @ www.steepleusa.com/contact.htm for all of your Copper Cupola, Finial, Steeple and Architechtural Metal projects. CIS provides 25 years of knowledge and experience in copper metal finials, cladding, roofing, domes, cupolas and steeple repair, restoration and installation nationwide. Helping to save costs in high places!

There are four main techniques used today for copper cladding a building:

Seamed-cladding (typically 0.7mm thick copper sheet on the facade): max 600mm by 4000mm 'seam centres'.

Shingle-cladding (typically made from 0.7mm thick copper sheet): max 600mm by 4000mm 'seam centres'.

Slot-in panels (typically made from 1.0mm thick copper sheet): max 350mm wide for 1.0mm, by nominal 4 mtr length.

Cassettes (typically made from 1.0mm up to 1.5mm thick copper sheet): largest-format cladding elements, more subframing is needed: can be 900mm x nominal 4000mm length.
When selecting size of a cladding element, take wind-loadings into account, and also consider the standard sizes available of the sheet (or coil) pre-material, to minimise material wastage through off-cuts. This helps reduce costs!

The choice of which system to use depends on the aesthetic effect required, and building geometry can also have an influence on the choice.

Copper cladding is very durable, lightweight compared to other materials and techniques, and at the end of the building life is also 100% recyclable.

Given the recent publicity about high metal prices, it may be surprising for most people to learn that copper is a very cost-effective cladding and roofing material. With good building design, materials choice and craftsmanship, copper roofing / facade cladding can be cheaper than slates or concrete tiles, especially when one takes into account the lasting colour, durability, maintenance-free and lightweight nature of the cladding.

Copper has been used as water-proof roofing material since ancient times, giving many old buildings their greenish roofs and domes. Initially copper oxide forms, replaced by cuprous and cupric sulfide, and finally by copper carbonate. The final copper sulfate patina (termed verdigris) is highly resistant to corrosion. Statuary: The Statue of Liberty, for example, contains 179,220 pounds (81.29 tonnes) of copper.

Alloyed with nickel, e.g. cupronickel and Monel, used as corrosive resistant materials in shipbuilding. Watt's steam engine firebox due to superior heat dissipation.

Copper compounds in liquid form are used as a wood preservative, particularly in treating original portion of structures during restoration of damage due to dry rot.

Copper wires may be placed over non-conductive roofing materials to discourage the growth of moss. (Zinc may also be used for this purpose.)

Copper is used to prevent a building being directly struck by lightning. High above the roof, copper spikes (lightning rods) are connected to a very thick copper cable which leads to a large metal plate underneath the ground. The electric current is dispersed throughout the ground harmlessly, instead of destroying the main structure. Lead free solder, alloyed with tin.
Copper has good corrosion resistance, but not as good as gold. It has excellent brazing and soldering properties and can also be welded, although best results are obtained with gas metal arc welding.

CIS Steeplejack
http://www.steepleusa.com/
(P) 330-461-6251
Email: info@steepleusa.com

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