For a while, during the high prices created by the war, the thought of building a copper roof or a zinc roof on the small house would have been received with a doubtful shake of the head. This is no longer the case, however, for the prices of these materials have come down to within reason, and there is no doubt as to their durability. No one has questioned the weathering qualities of copper or zinc. The copper roofs which have shown such practical durability on large buildings have usually been laid about the same as that described for standing-seam tin roofs. Cold-rolled or soft copper sheets, usually 20 inches wide, are used for this roof covering, weighing not less than 16 ounces to the square foot.
This type of roof is rather expensive for the small house, even with the reduced cost of copper, and for this reason a lighter grade has been made, and offered for use in the form of pressed metal shingles of very flat design. These copper shingles have been treated so that other colors than the copper shades can be secured.
The zinc manufacturers have also placed on the market zinc shingles of special interlocking flat design for use on small houses.
It has always been a debated question as to whether pressed metal shingles were architecturally permissible. Certainly there are some forms which imitate the clay-tile shingle that are decidedly inartistic, but the more natural flat patterns are less subject to this criticism.