Garrison explained that the interior design was intended to reflect the materials used on the exterior, which included Bluestone, brick and stainless steel. “Bluestone was used for all the banding and stone trim,” he said. “It was a way to introduce a slightly different palette. It is honed, so it has a light patina. Stainless steel was also used to give a modern appearance.”

With the objective of maintaining a consistent palette inside and out, large slabs of Tar Hollow Bluestone --quarried by Tompkins Bluestone of Hancock, NY, and supplied by Ottey and Hoopes, Inc. of Frazer, PA -- were used to form a fireplace in an interior reading room. Additionally, Elterwater slate with a honed finish - quarried in England and supplied by Burlington Natstone of Plano, TX - was employed as flooring throughout the public spaces of the library.

“When we went to try to find flooring for the main entrance, it had to be extremely hard and go with the palette,” said Garrison. “With public buildings, color is important. If it is too dark, it is gloomy. If it is too light, it gets dirty. Burlington Stone is a natural stone with a softer look. It has a lot of veining and depth of color. It's a fairly spirited stone. When we put it down next to the brick and maple, we really liked how they complemented each other. It also married well with the Bluestone. The Elterwater green color is soft and easy on the eyes.”

In total, 3,000 square feet of Elterwater slate planking was employed as flooring. “We used a combination of random lengths and widths in a running bond pattern,” said Garrison. “The idea was to create more visual interest in the floor, and feel a little more of the exterior brought in. The random pattern gave it a less formal presence.”

The slate floor pieces include widths of 8, 12 and 16 inches with lengths ranging from 12 to 32 inches. They have a thickness of 3⁄4 inch.

One of the main focal points of the library is a curved staircase, also comprised of Elterwater slate. The stair treads measure 68 x 13 x 11⁄4 and 60 x 13 x 11⁄4 inches. Tile sizes on the landings are 36 x 24 x 3⁄4 and 54 x 24 x 3⁄4 inches.

Installing the slate

“It looks like wood planking,” said Vigna. “We had to go from one expansion joint to another [because of the varying tile sizes].” A thick mud set - at least 2 inches thick - was used to install the stone flooring.

“The product itself is really a decent cut material,” said the installer. “Burlington does a nice job supplying what it says it is going to. It's a really nice-looking library. It fits Princeton well.” Vigna also added that the Princeton Library does an excellent job of maintaining the slate floor.

According to the architect, once construction began on the project, it took approximately 14 months to complete. “The design process took a little long because of some delays,” said Garrison. “One challenge was that the completion had to correspond with a nearby garage project. We were delayed six months before construction started because the garage project was delayed. You can't have a public building with nowhere to park.”

The Princeton Library opened its doors with a grand opening in the spring of 2004.

Credit Box

Architect: Hillier Architecture, Princeton, NJ
General Contractor: Turner Construction
Stone Quarriers: Burlington Stone, England (slate); Tompkins Bluestone, Hancock, NY (Bluestone)
Stone Suppliers: Burlington Natstone, Plano, TX (slate); Ottey and Hoopes, Inc., Frazer, PA (Bluestone)
Stone Installers: Artisan Tile & Marble Co. of NJ Inc., Somerset, NJ (slate); Speranza Brickwork, Whitehouse Station, NJ (Bluestone)