What is Indiana limestone, and can it be used inside a bathroom?

Where has Indiana limestone been used?

Largely on the outside of large buildings. About 35 of the 50 US state capitols use it, along with the Empire State Building, the Pentagon and Washington National Cathedral. It was also used to rebuild Chicago after the 1871 fire, and demand rose again after the 1973 oil embargo because the stone is energy-efficient to produce.

The same sources note a drawback: acid rain wears it down relatively quickly, so it is less often chosen for monuments today. That sensitivity to acid is the thing to carry indoors.

What color is Indiana limestone, and how does it vary?

One producer describes its Standard Buff as a traditional shade ranging from a warm cream to light brown, with muted veining and slight grain movement visible in the surface, in a fine to medium grain. Variation from block to block is the norm in a natural bed, so buyers choose from a color range, not a single swatch. Other colors exist, but this page did not verify them.

Finishes listed for the stone include honed, antique, bush-hammered, sandblasted, smooth and wire-brushed. Honed is the smooth, matte option for interiors; bush-hammered and sandblasted faces are rougher and hold more dirt.

How porous is Indiana limestone?

One producer lists absorption by weight of 7.5% for its Standard Buff line, tested under ASTM C97. Limestone as a class ranges from about 0.1% porosity in the densest rock to about 40% in chalk, so Indiana sits toward the open end of building stone.

Other listed values from the same sheet: density of 144 lb/ft³, compressive strength of 4,000 psi (ASTM C170) and modulus of rupture of 700 psi (ASTM C99). Those are strong enough for cladding, but the absorption means liquids wick in, which is the practical concern in a wet room.

Can Indiana limestone be used for a bathroom vanity or floor?

It can be cut, carved and honed, and the producer's project list includes a carved classical limestone fireplace, but the sources describe it mainly as a building stone and give no bathroom guidance. Indoors, treat it as a soft, porous calcite stone.

That means a penetrating sealer, a honed face, and no vinegar, citrus or tub cleaners, since dilute acid fizzes on limestone. A floor in a shower area will pick up water and soap faster than a dense stone. Check slip rating, substrate and floor loading with a licensed installer and local code.

How heavy is a limestone tub or sink?

Lighter than marble. At the producer's 144 lb/ft³ against about 168 for marble, our reference 67 × 31 × 22 in oval tub (about 1,150 lb in marble) would come to roughly 985 lb empty in this stone. That is a density-only estimate, not a quote.

Limestone is also easy to cut and carve, one reason it has long been a building stone. See the stone bathtub weight guide for how weight and floor loads are calculated.

What is Indiana limestone often compared with?

Cream stones such as travertine, Jerusalem stone and Crema Marfil. Travertine has pitted layers and Indiana limestone is a uniform fossil-rich rock; Crema Marfil is a Spanish stone sold as marble and Jerusalem stone is a Middle Eastern limestone. See travertine vs marble for how a calcite stone and a metamorphic marble differ in a bathroom.

Does Pietra Fonte make pieces in Indiana limestone?

We don't currently offer Indiana limestone. We carve marble, travertine, onyx and a small range of other stones to order. See the stone library for what we work in, or write to us about a one-off piece through bespoke.