The collection consists of three unbound albums which were used as sales portfolios to show the variety and extent of Warren-Ehret Company's roofing jobs on various buildings. The buildings are predominately industrial structures, which are arranged and numbered by their type of business. In addition to industrial structures and railroad company buildings, there are offices, some stores, apartments and private homes. The collection covers buildings in the greater Philadelphia area, surrounding Pennsylvania (including seventeen views of Reading businesses), New Jersey, New York City, and nearby Connecticut. Many of the images are also valuable for the information they provide about surrounding businesses. This is especially true of the cityscapes in which views of several businesses are often included.

The following industries, businesses, and building types are represented in the Warren-Ehret Company albums: abattois; architectural and ornamental woodwork; bicycle factories; breweries; brickmaking; carpet mills; chemical and lead works; cigar factories; cordage; department stores and drygoods; dying; farm and garden tools; furniture and picture frames; gas and marine engines; glue making; gymnasiums; hotels; ice companies; leather and shoes; lighting companies; lumber; machine tools; millinery; nuts and bolts; oil refineries; oilcloth and linoleum factories; paper boxes; piers and wharfs; plaster board; power houses; schools; shipyards; shoemaking; stables; steel making and iron foundries; stone and terra cotta works; stoves, furnaces and ranges; streetcar and railroad car building; sugar refineries; textile mills; toolmaking; trolley barns; warehouses, whiskey making.

Of note are two buildings designed by well-known architects: Land Title and Trust Company Building (Phila.) by Daniel H. Burnham & Co. and the Cable Building (N.Y.) designed by Stanford White of McKim, Mead & White.

Although not the subject of the image, the following Philadelphia buildings and enterprises are visible in the collection: Blaul. Studio (N. 8th St.); Chauveau's restaurant (Chestnut St.); City Hall; P. J. Deery (N. Broad St.); Gormly Plumbing Company (N. 10th); Gummey, McFarland & Co. (N. 10th St.); Charles R. Hunt (47th and Woodland); Hughes and Muller (Chestnut St.); J. Levy (Broad St.); Matthew McGettigan Shoestore (47th Louis Metzger & Co. (Broadway); Simpson's Restaurant (W. 22nd St.); James M. Starr (E. 17th St.);Van Cott & Co. (Woster St.)

The Reading, Pennsylvania, businesses included in the collection are: Mansion House, Bright & Lerch warehouse; Hotel Penn; Reading National Bank; Second National Bank; Stevens Building; YMCA; Earl Building; Bissinger Annex; Wm. F. Rempiss & Co. (Standard Bicycle Works); Realy Bicycle Works; Acme Manufacturing Co.; Yocum Brothers; F. S. Wertz, Reading Stove Works; Reading Iron Co.; Lauer Brewing Co.; Reading Traction Co.