Fireplace Construction: Soapstone Vs. Limestone

Formation

• Limestone forms in warm, marine environments that contain organisms with calcium carbonate skeletons or shells. After the creatures die, calcium carbonate accumulates into a sediment known as limestone. Soapstone also forms naturally, from mineral deposits subject to the heat and pressure of the Earth's core. Talc ranks as one of the main components of soapstone -- the more talc the stone contains, the softer it feels.

Benefits

• Its stain- and bacteria-resistance explain soapstone's appeal as a material. Fireplaces built to produce heat can do so with less flame when using soapstone, due to its heat-retaining properties. Some homeowners find limestone visually pleasing because of the crystal flecks and and its appearance when polished.

Considerations

• Limestone's susceptibility to stains, such as those caused by soot, may dissuade consumers and contractors from its use in a fireplace, but they can purchase higher-density, more stain-resistant limestone. Also, an oxygen-based cleaner usually removes the more difficult stains. Soapstone proves more susceptible to chipping or scratching than limestone; but homeowners can remove these imperfections with fine-grained sandpaper.