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How To Build An Underground Fire Pit

How deep should an inground fire pit be?

Fire-pit 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.

Can you build a fire pit in the ground?

Planning for an In-Ground Fire Pit Other types of fire pits can be built from kits and traditional retaining wall blocks. The installation for this in-ground fire pit has several layers: A 2-inch layer of paver base at the perimeter of the fire pit ring. Concrete blocks on top of the paver base to form the ring.

Does an inground fire pit need drainage?

Depending on whether you have a portable metal or fixed stone fire pit, you may need to install a drainage system – so it’s true to say that permanent fire pits do need drains. This makes them easier to use, clean and maintain.

Can you bury a fire pit?

You can simply dig a hole a safe distance away from other structures and then place rocks along the bottom. The many options for an in-ground fire pit include building it into your outdoor patio with fire-rated materials.

How deep should a fire pit be?

Most landscapers recommend that the base of a fire be positioned six to 12 inches below the surrounding grade. A fire that’s located deeper in the earth will warm fireside seating less than one that’s built closer to the grade.

What should I put in the bottom of my fire pit?

What do you put in the bottom of a fire pit? You’ll want to start with a layer of sand at the bottom of the pit, and then top the sand with gravel, lava rocks, fire pit glass, paving stones or even bricks for your fire pit. Alternatively, you can simply use dirt.

Does a fire pit need a liner?

If you’re envisioning your fire pit as a permanent part of your backyard or patio, you’ll definitely want to use a fire pit liner. If your fire pit is made of fire bricks, you won’t need to use an insert. Fire bricks are made to withstand intense temperatures and are an excellent choice for permanent fire pits.

Will gravel explode in a fire pit?

Some materials like hard rock, gravel, or sand weren’t meant to reach high temperatures and can spark and explode if your fire gets too hot. Sandstone, river rocks, natural rocks, and gravel are not ideal fill for fire pits because they are more likely to crack or explode under high heat.

How do you keep a sunken fire pit from filling with water?

You can protect your fire pit from rain by covering it with a tarp. You can use a special tarp designed for fire pits, or you can use one designed for grills. Either way, a heavy-duty tarp made of a strong synthetic material should protect your fire pit from the elements.

How do you put drainage in a fire pit?

Add Drainage If the soil drains well or there is moderate precipitation, simply dig a hole in the center of the fire pit. The hole should be 12 inches in diameter and 18 inches deep. If the soil doesn’t drain well or there is heavy precipitation, dig a trench from the center out.

How do you keep water from pooling in a fire pit?

Using Tarps: This is simply a way of covering the pit when not in use. Being one of the cheapest and most handy solutions, a tarp can be used in both permanent and portable fire pits. All you need to do is to cover your pit with a strong synthetically made tarp which repels water, keeping your pit moisture free.

Do inground fire pits work?

In the ground fire pits are often safer because they are smaller and contain the flames more than an above the ground fire pit. That said, they are also easier to fall into and so you have to be careful with little ones around.

What is a good size for a fire pit patio?

A fire pit itself is rarely larger than four or five feet across. The patio space around it should be an additional four to six feet on all sides. Seat walls are a great way to both visually define the space and allow for lots of seating.

Should I put sand in the bottom of my fire pit?

The sand absorbs the heat and distributes the heat throughout the entire base of the pit evenly. Without the sand, the heat can become concentrated in one specific area. When this happens, it can lead to the metal at the bottom of the fire pit deteriorating and burning through.

What is the best height for a fire pit?

A good rule of thumb is to make an above-ground fire pit 12-14 inches tall. This is a few inches shorter than standard patio furniture seat height. If you want to be able to sit on the edge of the pit itself go a bit higher, 18-20 inches will be comfortable.

Do you need lava rocks in fire pit?

You should use lava rocks in a fire pit because it has functional benefits, including providing a porous barrier protecting the components from elements and is low maintenance. It also has cosmetic benefits.

What kind of sand do you put in the bottom of a 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.