Yes, because cinder blocks are permeable, they have an advantage over regular concrete blocks. Is Cinder Blocks The Best Block To Build A Fire Pit? This solution strengthens the fire pit wall while also providing drainage. Install blocks until the second row is complete, then mortar in the cap blocks. Joints should be approximately 1/2 inch apart. Tap the block until it reaches the desired level. Spread butter on the bottom of the first block and place it on the first course. Once the perimeter has been completed, it is time to begin stacking blocks. If you’re not careful, it’s simple to make a strange form. Butter the blocks and place them, checking for level as you go. Install the third block in the same manner, and so on. Clean up any extra mortar with the trowel.Ĭheck that the first and second blocks are both levels. Mortar joints should be approximately 1/2 inch apart. Using a trowel, apply some mortar to the side of the second brick. The difference between this approach and the DIY basic construction method is that we use mortar or cement to connect the bricks. Place the block directly on top of the gravel and level it. When the gravel is finished, start laying down the first cinder block in a corner. Normally dig 8-10 inches down and dump 4-6 inches of gravel. However, mortar or cement must be used to glue the bricks together, as well as a footing.Ī solid cinder block fire pit should be supported by a gravel foundation. The techniques for building a robust fire pit out of concrete blocks are fairly similar to the DIY version. How Do You Build A Durable Cinder Block Fire Pit? Check with the store to see if the blocks are fire-rated. Porous cinder blocks are preferable to solid concrete blocks for fire pits because they allow steam to escape, minimizing the risk of moisture buildup and explosions.Ĭhoose a fire-rated cinder block that absorbs heat and keeps you safe from sparks without becoming damaged or harmful. Cinder blocks lack the tensile strength of concrete blocks (they should not be used for retaining walls), but they are extremely durable.
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