Best Fire Pit Ring Inserts for DIY Builds
If you're building a fire pit out of pavers, stone, or brick, the ring insert is the part most people underestimate. It's not decorative. It's what keeps your build from cracking, collapsing, or turning into a maintenance headache after two seasons.
A good insert acts as a heat shield between the fire and your masonry, channels airflow properly so the fire actually burns well, and gives you a clean bowl shape that's much easier to clean out. Without one, you're just stacking rocks around a hole and hoping for the best.
These five picks cover a range of sizes and build types, from compact above-ground paver circles on a 10x10 patio to larger in-ground builds in a sprawling backyard. All are available on Amazon, all are made from real steel, and all of them will outlast the landscaping around them.
Best Heavy-Gauge Insert for Large DIY Builds
If you're building a fire pit that seats six or more people and you want it to be the permanent centerpiece of your backyard, the SteelFreak 36-inch Solid Steel Fire Ring is the insert to get. It's cut from 3/16-inch thick steel plate, which is meaningfully heavier than most rings you'll find in this category. You can feel the difference the moment you pick it up.
For an above-ground build with four or five courses of retaining wall block, this ring drops right into the interior and creates a clean, round firebox. The 36-inch diameter gives you room for real logs, not just kindling-sized pieces. A lot of people building with Allan Block or Pavestone retaining wall blocks find this is the size that fits their standard circle kit almost perfectly.
It also works beautifully for in-ground builds. Dig your pit, compact the base, drop the ring in, and pack your material around the outside. The steel will handle the thermal cycling from cold ground temperatures to full fire heat without warping in any way that would matter.
SteelFreak 36" Solid Steel Fire Ring Insert
$79
3,200+ reviews
Heavy 3/16" plate steel in a 36" diameter, made in the USA and sized to fit most standard retaining wall circle kits.
Shop on Amazon →Best Compact Insert for Smaller Patio Builds
Not every DIY fire pit needs to be a 36-inch behemoth. If you're working on a 10x10 patio or building something in a tighter backyard space, the Titan Great Outdoors 24-inch Steel Fire Ring Insert is the right size. It gives you a real fire without the footprint that crowds out seating.
The 24-inch diameter is also the easiest to work with if you're building a freestanding above-ground pit using standard concrete blocks or a simple circle of flagstone. The ring sits inside without a lot of gap to fill, which keeps things looking clean and reduces the chance of embers escaping through loose masonry.
At this size, the ring also pairs well with a small cooking grate if you want to do some fire cooking. You're not grilling a whole rack of ribs, but you can absolutely handle a cast iron skillet or a couple of foil packets. The steel gauge is solid for the price and handles regular weekend use without issue.
Titan Great Outdoors 24" Steel Fire Ring Insert
$44
1,800+ reviews
A compact 24" insert that fits neatly into small paver or flagstone builds and works great on tighter patios.
Shop on Amazon →Best Mid-Size Insert with Cooking Compatibility
The Sunnydaze Decor 30-inch Steel Fire Ring Bowl is the middle ground that works for most backyards. It's bigger than the 24-inch rings without requiring the kind of large build footprint that a 36-inch demands. For a group of four to six people, this is the sweet spot.
What sets it apart for DIY builders is the bowl shape. Unlike flat ring inserts, the bowl design holds ash in the center and improves airflow from the sides, which means your fire gets better oxygen and burns cleaner. If you've ever had a fire pit that smokes too much or needs constant tending, a better bowl geometry makes a real difference.
Sunnydaze offers versions with a compatible cooking grate that drops right over the bowl, so if you want to do any fire cooking down the road you're not locked out. Building your pit around this insert means you can use it for pure ambiance on Friday night and cook over it on Saturday morning without swapping anything out.
Sunnydaze Decor 30" Steel Fire Ring Bowl Insert
$62
2,400+ reviews
A bowl-style 30" insert that improves airflow over flat rings and accepts optional cooking grates for dual-use builds.
Shop on Amazon →Best Budget Insert for First-Time Builders
If this is your first DIY fire pit and you're not sure yet how much use it'll get, the Backyard Expressions 26-inch Steel Fire Ring is a smart starting point. It's priced under $45 and made from rolled steel with a clean weld seam. Not the heaviest gauge on this list, but it holds up to regular fires without issue.
The 26-inch diameter sits between the compact 24-inch rings and the more standard 30-inch sizes, which actually makes it versatile for a wider range of block and stone configurations. If you're using standard 6-inch retaining wall blocks, a 26-inch ring gives you a comfortable gap for filling with gravel or sand on the outside before your first course goes up.
A lot of people use this insert for their first build, then upgrade to a thicker gauge ring after a season or two once they know exactly what size and style fits their yard. The low price makes it easy to treat it as a proof-of-concept investment rather than a long-term commitment.
Backyard Expressions 26" Steel Fire Ring Insert
$42
1,100+ reviews
An affordable 26" rolled steel insert that fits a wide range of DIY block and stone build configurations.
Shop on Amazon →Best Deep-Bowl Insert for In-Ground Builds
In-ground fire pits have a different set of requirements than above-ground builds. You need more depth for proper airflow when the fire is sitting below grade, and you need an insert that can handle moisture from the surrounding soil without rusting out in two years. The Amagabeli 32-inch Deep Steel Fire Ring Insert is built specifically for this application.
The deeper bowl walls, usually running 10 to 12 inches tall, keep the fire well-contained below ground level and reduce the wind exposure that tends to blow smoke directly at whoever is sitting nearest. For a backyard build where you've excavated 12 to 18 inches down and lined the walls with stone or brick, this insert slots in and gives you a proper firebox rather than just a hole in the ground.
The steel is treated with a high-temperature coating that handles the moisture exposure from in-ground installation much better than bare steel. You'll still want to cover it when not in use, but you're not looking at the kind of surface rust that turns into structural rust after a few wet springs.
Amagabeli 32" Deep Bowl Steel Fire Ring Insert
$68
980+ reviews
A taller, deeper 32" insert designed for in-ground builds where extra bowl depth improves airflow and fire containment.
Shop on Amazon →Quick Tips for DIY Fire Pit Ring Inserts
- Size the ring before you buy blocks. Pick your insert diameter first, then plan your masonry around it. Trying to fit an insert into a build you've already started is how you end up with ugly gaps or an insert that wobbles.
- Leave a 2-inch gap between the ring and your masonry. Packing gravel or sand in that gap allows for thermal expansion. A ring that's wedged tightly against stone or block will eventually crack the surrounding material as it heats and cools.
- Thicker steel is worth the cost if you fire regularly. The difference between 1/8-inch and 3/16-inch steel might seem small, but thicker rings resist warping and pitting significantly longer when you're burning every weekend through the fall.
- Drill a few drainage holes in the base for in-ground builds. Even with a gravel sub-base, water can pool inside the bowl after rain. A couple of small holes at the bottom let it drain rather than sitting in ash and accelerating rust.
- Use a wire brush on the inside surface after the first few burns. The initial heat will burn off any factory coating or mill scale. Brushing it down after those first fires and letting it develop a natural patina helps the steel stabilize and resist rust.
Frequently Asked Questions
What size fire pit ring insert do I need for a standard retaining wall block circle kit?
Most standard circle kits from brands like Pavestone or Belgard are designed for a 36-inch interior diameter. A 36-inch ring insert fits these builds almost exactly. Check your specific kit's interior diameter before ordering, since some compact kits run closer to 30 inches.
Can I use a fire pit ring insert in an above-ground paver build?
Yes, and it's the right move. Without an insert, the heat from repeated fires will eventually crack and shift your pavers or blocks. The ring acts as a heat shield and contains the fire in a consistent shape so your masonry stays stable.
Do fire pit ring inserts rust?
Plain steel rings will develop surface rust over time, especially if left uncovered between uses. This is mostly cosmetic at first but can become structural. Covering your pit when not in use and brushing off ash after fires extends the life significantly.
How deep should a fire pit ring insert be for an in-ground build?
For in-ground pits, look for inserts with bowl walls at least 10 inches tall. Shallower rings in an in-ground context restrict airflow and tend to smoke more. Deeper bowls also keep embers from jumping out when you're working with wood below grade.