Title: Concrete Roofing Tile Problems
Author(s): Leslie H. Allen
Publication: Journal Proceedings
Appears on pages(s): 336-340
The use of concrete roofing tile is steadily growing, particularly in Chicago, New York, Los Angles, Pittsburgh and Detroit, where plants equipped with automatic power machines are turning out by quantity production methods a tile of high quality, maximum density, strength and imperviousness, fully equal and in some respects superior the competing clay product. There is as much difference today between the modern steam-cured roofing tile made on automatic machines and the hand-made product as there is between the present-day concrete block of A. C. I. standard and the old hand-made hack-yard variety.