Today s Greatest Roof Value!

A roof acknowledged for over a auarter century to be the best that money can buy, today offers greater value than ever before.
Scientific research and development through Haydite light weight aggregate, plus economical design, have produced the light weight roof slab (as low as 10 lbs. per sq. ft.) with new insulating value—retaining the known strength, permanence, fire-safety of concrete-—and no maintenance! It goes on the same light steel frame that carries other roofs. There is no other roof construction known today that can compare in value with this.

Teatherweight Concrete INSULATING ROOF SLABS

are in broad service all over the country, on industrial, utility, and railroad buildings, as well as on prominent public buildings — accepted and used by outstanding architects and engineers. Complete details in our “Catalog and Roof Standards sent on request.
Made, Laid and Guaranteed by
Executive Offices: 608 South Dearborn Street ------ Chicago
Plants Near CHICAGO - NEW YORK - PITTSBURGH - BIRMINGHAM FOR OVER A QUARTER CENTURY
Chevrolet Motors, Division of General Motors Corporation, Assembly Building, Tarrytown, N. Y., covered with over 400,000 sq. ft. of Featherweight Concrete Insulating Roof Slabs. Many other plants of this Company from New York to California are protected with Federal. Architects: Albert Kahn, Inc.