Typical installed weights of various roofing materials.

MALLEABILITY

   Copper is one of the most ductile of metals. No other is more easily worked or so permanent when formed. This is a decided advantage in working with copper, as the "brittleness" which renders some other metals difficult to handle is not present.

ECONOMY

   Freedom from repairs or maintenance expense, combined with durability, makes copper one of the most economical and best roofing materials obtainable.

   First cost is the only expense involved in the use of copper for building purposes. It has a higher salvage value than any other metal used for building purposes. Being indestructible, it can be salvaged from any building destroyed and will always sell for a reasonable figure.

COPPER SHINGLES

   Another form of copper roof covering is copper shingles. These are made from hard-rolled copper sheets in a variety of sizes and designs. The method of application is simple. They are secured to the roof sheathing by copper nails at the top. Each shingle locks with adjoining ones to form a water-tight joint. No soldering is required. No allowance for expansion is necessary as the lock provides room for movement.

   Copper shingles can be laid equally well on new roofs and over old shingled roofs. Because of their raised-butt construction they are lifted slightly, thus providing an air space between the shingle and the roof sheathing, allowing ample ventilation with consequent coolness in summer.

   Copper shingles are light. A roof so covered weighs only one-ninth as much as slate and one-third as much as wood.

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