What Kind of Bricks Are Used in a Fireplace?

You should only use a special type of brick, called firebrick, fire brick or a refractory brick, to make a fireplace. Normal bricks cannot stand up to the continued high heat inside a fireplace and will crack.

  • Creation

In order to create firebricks, a special mixture called fire clay must be created from a mixture of silica, aluminum oxide and other materials that stand up well to high temperatures. The clay is then baked in a kiln until vitrified.

  • Significance

The refractory properties of firebricks makes them very popular for a variety of applications. Not only are firebricks useful in fireplaces for people's home, but also for industrial furnaces, steel refineries and even as insulating tiles for the space shuttle.

  • Size

Firebricks are rectangles usually measuring 9 x 4.5 x 2.5 in. This is the standard size, but it may vary as they are adapted for specific applications.

  • Warning

Do not attempt to build a fireplace out of normal bricks. The bricks could crack under the heat and it could endanger the integrity of the whole fireplace and collapse.

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