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How to Build a Fire Pit With Cinder Blocks?

If you’re wondering “Can I use cinder blocks for a fire pit?” or “Are cinder blocks fireproof enough for an effective fire pit?” the answer to both is a definitive “Yes!” Cinder block fire pits are great both for summer grills and for creating a warm and cozy atmosphere in the winter.

How does one go about building a fire pit with cinder blocks, however? Here’s our step-by-step guide.

Location, location, location

Choosing the right location for your fire pit is key. The base will have to be non-flammable such as bare ground or concrete, and the location should be at least 20 feet (7 meters) away from any structures, power lines, trees or bushes. It’s also a good idea to consult with your local government’s regulations for outdoor fire pits.

Clear the area

You’ll need a nice circular area of the right size for your fire pit and for some free space around it.

Mark a circular fire pit area for your fire pit

The ideal size is 3-4 feet in diameter (1 to 1.5 meters). This is both the most stable and manageable size, and it is ideal for four people to sit around the fire pit. If you want more people to be able to sit around the pit, add 1 foot per person but keep in mind that 4 feet is typically the best diameter to go with.

Dig about 6 inches

Now’s the time to dig the pit itself. 6 inches (~20 cm) is usually enough but you can go a bit deeper if the pit is going to be wider than 4 feet.

Add 3 inches of gravel

The gravel is important for drainage so 2-3 inches (up to 10 cm) at the bottom of the bit is ideal.

Stack the cinder blocks

Place the first row of cinder blocks around the pit. Their interior corners should touch and their holes should point upwards. Then, place the second row of cinder blocks on top of them, spanning the spaces between the blocks on the first row.

If you want the fire pit to be permanent, lift the bricks on the second row one at a time and apply masonry adhesive. Then, while giving the adhesive a bit of time to dry off, put top caps on the upper row of blocks for a good look.

And that’s about it! If you were wondering “Can cinder blocks withstand fire?” just light up your new fire pit and see for yourself!

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