FAQ: How Many Blocks To Build A Fire Pit?

How many blocks do I need to build a fire pit?

I picked up some cheap retaining wall blocks from Home Depot. Pavers also work well, but since these are literally made to be used as a wall, they stack nicely. The fire pit is 36″ in diameter, so its circumference is about 113″. Each block is about 9″ long on the short end, so I needed 13 bricks for each “level”.

Whats a good size for a fire pit?

The optimal size for a fire pit is between 36 and 44 inches inside diameter. That will create enough room for a healthy fire but still keep gatherers close enough to chat. As an added precaution, the fire pit should be lined with a thick steel ring like the ones used for park campfires.

How deep should a fire pit be?

Firepit depth really depends on what you want and how into your project you’re going to get. For instance, if you just want a basic fire pit, dig about 6 to 8 inches down and call it good. You can go deeper if you want, but keep in mind that you don’t want the hole so deep you can’t enjoy watching the fire.

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Should I put sand in my fire pit?

The main benefits of using sand are that it helps to soak up the heat and evenly distribute the heat throughout the fire pit. Sand is also great for protecting the actual metal bowl from the intense heat the fire can put out. At the end of the day, there is no harm in putting sand in the base of a metal pit.

What is the best base for a fire pit?

Hard rocks like granite, marble, or slate are much denser, and therefore less likely to absorb water and explode when exposed to heat. Other rocks that are safe to use around and in your fire pit include fire-rate brick, lava glass, lava rocks, and poured concrete.

What is the best height for a fire pit?

Aim for a fire pit height of 12 to 14 inches from the base of the walls to the top of the walls if you want guests to be able to prop their feet on it while seated around it on standard 18-inch-tall dining-height patio chairs.

Do you need a fire ring for a fire pit?

Like most projects, it can be as extravagant as your skill level and wallet can allow, but a basic fire pit may be all you need to make your summer nights memorable. If you choose not to use a steel bowl in your pit, make sure you use either a still fire ring or line the inside of the pit with fire proof blocks.

What do you put under a fire pit?

You can easily find a hardboard of cement, landscaping tiles, concrete or any other heat resistant material to put under a fire pit on grass or your precious deck. These non flammable, heat resistant materials will absorb much of the heat thereby insulating your surfaces from the fire pit heat.

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Will cinder blocks explode in a fire pit?

No, generally speaking cinder blocks will not explode when exposed to the kind of heat fire pits put out (river rocks will though, check out our article). However, you might find that pavers or fire bricks are a better option for the long term.

Where should I put my fire pit?

Fire pits should be placed at a minimum of ten feet away from your house and also neighbors yards. In addition to placing the fire pit a safe distance away from your home, it should also be in a place where there are no overhanging branches, fences or other structures that could easily catch fire.

What should you not burn in a fire pit?

Do Not Burn These in an Outdoor Fire Pit



Do not burn paper, trash, or anything manmade. These release carbon dioxide, greenhouse gases, and a number of other toxic chemicals into the environment. You also shouldn’t burn treated wood. This includes pallets or any form of wooden materials used in industrial applications.

What kind of sand should I use in my fire pit?

Fire-proof silica sand is an excellent base layer for a fire pit. Silica sand can be used as cost-effective filler to cover the bottom areas of a fire pit. Fire glass or lava rock can be added on top of the sand for effect.

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