This section is from the book "A Treatise On Architecture And Building Construction Vol3: Stair Building, Ornamental Ironwork, Roofing, Sheet-Metal Work, Electric-Light Wiring And Bellwork", by The Colliery Engineer Co.. Also available from Amazon: A Treatise On Architecture And Building Construction.
The ordinary lengths of shingles are from 16 to 18 inches, or 24 to 27 inches, and the widths, from 3 to 7 or 10 inches. A bundle contains about 250 shingles. Thick shingles measure about 9/16- inch, and thin ones about 3/8 inch at the butt. Shingles are wedge shaped and 1/16 inch thick at the upper end.
Dimension shingles are always cut to a uniform size or width, and are preferable in laying patterns; they are 4, 5, or 6 inches in width, and are usually dressed.
The term No. 1 signifies that the entire shingle is of a clear, sound, serviceable wood, free from all knots, sap, etc.
Shaved shingles are split and shaved with the draw knife.
Clear butts indicate that the shingles contained in the bundle have a clear butt, or enough clear surface for the exposure to the weather.
Fancy butts, or pattern butts, are shingles having the butts, or ends, sawed to a geometric or other form, such as saw tooth, round, hexagonal, etc. These shingles are usually dressed.
Shingle lath, on which the shingles are laid, usually runs from 1 1/4x2 inches to 1 1/4x3 inches.