Best Fire Pit Ring Insert for a DIY Gravel Fire Pit
The steel ring, screen, grate and cover a block or stone fire pit needs, the specs that decide how long they last, and how much gravel goes in and around it.
Updated · by the Smart Gravel Calculator team
As an Amazon Associate I earn from qualifying purchases. This guide is written from product specifications, building-code requirements and our calculators — it is not a hands-on product test. Affiliate disclosure
A DIY fire pit is a ring of wall blocks or stone around a steel liner, set on drainage stone and surrounded by a non-combustible gravel apron. The steel ring insert is the part that matters most: it shields the blocks from direct flame, which can crack concrete block, and it sets the inside diameter of the pit.
Below, the parts are compared by job and by the spec to check, and the gravel for the pit floor and the surround is worked out with our fire pit gravel calculator. Check local burn rules and your homeowner's insurance before building.
Compared by type
Pros and cons describe each type from its specifications. The product in each row is a current, well-rated option of that type on Amazon, refreshed twice a day — check the listing's specifications against the “check” line before you buy.
Steel fire pit ring insert
Best for: Lining a block or stone fire pit so flame does not hit the blocks
See options on AmazonCheck: Steel thickness (gauge), inside diameter and whether it has a lip to sit on the blocks
- Protects wall blocks from heat damage and cracking
- Sets a clean, round inside diameter
- Thick steel lasts many seasons
- Thin rings warp and rust through quickly
- Must match the block ring diameter you plan to build
- Rusts on the surface — normal, but not cosmetic
Spark screen
Best for: Burning wood near a house, trees or dry grass
See options on AmazonCheck: Diameter that fits inside or over the ring and a lift handle or hinged door
- Stops embers and popping sparks escaping
- A door lets you add wood without lifting the whole screen
- Required by some local burn rules
- Blocks some of the view of the fire
- Mesh can rust and sag over time
- Gets very hot — needs a poker or gloves to move
Log grate
Best for: Wood fires that burn cleaner with air underneath
See options on AmazonCheck: Grate diameter relative to the ring and leg height
- Air under the logs means less smoke and an easier start
- Keeps logs off wet drainage stone
- Ash falls through for easy clean-out
- Takes some inside depth from the pit
- Bars can sag on cheap grates
- One more part to size to the ring
Fire pit cover or lid
Best for: Keeping rain and debris out of the pit between fires
See options on AmazonCheck: Material (steel snuffer lid vs vinyl cover) and diameter
- Keeps drainage stone and ash dry
- Steel snuffer lids can also smother a fire
- Keeps leaves and kids' toys out
- Vinyl covers go on only once the pit is cold
- Must be sized to the outer diameter
- Steel lids are heavy
Fire poker and log tongs
Best for: Moving logs and the screen safely
See options on AmazonCheck: Length (30 in or more) and a heat-resistant handle
- Keeps hands well away from the flame
- Tongs place logs without throwing sparks
- Cheap
- Short pokers put your hands over the fire
- Cheap handles get hot
| Type | Current option | Pros | Cons |
|---|---|---|---|
| Steel fire pit ring insertBest for: Lining a block or stone fire pit so flame does not hit the blocksCheck: Steel thickness (gauge), inside diameter and whether it has a lip to sit on the blocks | See options on Amazon |
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| Spark screenBest for: Burning wood near a house, trees or dry grassCheck: Diameter that fits inside or over the ring and a lift handle or hinged door | See options on Amazon |
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| Log grateBest for: Wood fires that burn cleaner with air underneathCheck: Grate diameter relative to the ring and leg height | See options on Amazon |
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| Fire pit cover or lidBest for: Keeping rain and debris out of the pit between firesCheck: Material (steel snuffer lid vs vinyl cover) and diameter | See options on Amazon |
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| Fire poker and log tongsBest for: Moving logs and the screen safelyCheck: Length (30 in or more) and a heat-resistant handle | See options on Amazon |
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How much gravel the pit and surround take
The pit sits on a layer of drainage stone so rain does not pool in the ashes, and a gravel apron around it keeps grass and chairs back from the flames. The fire pit gravel calculator works out both; the example uses its function.
Worked example: A 3 ft (inside) pit with a 5 ft pea gravel surround
- Drainage stone inside the pit, 6 in deep: 0.14 yd³ / 0.2 tons
- Pea gravel surround, 5 ft past the pit and 3 in deep: 1.28 yd³ / 1.73 tons
- Finished diameter: 13 ft; edging for the outer ring: 41 linear ft
1.93 tons of stone in total — at this size bagged gravel is practical.
Buying bags rather than a bulk load? The gravel bags calculator converts the total into bags.
Sizing the ring to the blocks
- Decide the inside diameter first (36 to 44 in is common for a backyard wood fire), then buy the ring, then lay the blocks around it.
- Leave a small gap between the ring and the blocks so the steel can expand without pushing the blocks out.
- Use solid concrete wall blocks or natural stone; avoid river rock and porous stone inside the pit, which can crack or burst when wet stone is heated.
- Keep the gravel apron at least 3 ft wide on every side — the calculator's default 5 ft also leaves room for chairs.
| Part | Needed? | Notes |
|---|---|---|
| Steel ring insert | Strongly recommended | Protects the blocks and sets the diameter |
| Drainage stone in the pit floor | Yes | Stops water pooling in the ashes |
| Gravel surround | Yes | Non-combustible apron around the pit |
| Spark screen | Recommended | Required by some local rules |
| Log grate | Optional | Better airflow, less smoke |
| Cover or lid | Optional | Keeps the pit dry between fires |
Safety notes
- Check local burn regulations and any burn bans before building or lighting a fire, and keep the pit well away from the house, fences, overhanging branches and sheds.
- Keep a hose, bucket of water or fire extinguisher within reach, and never leave a fire unattended.
- Do not use gasoline or other accelerants to start a wood fire; let ashes cool completely before removing them.
Frequently asked questions
Do I need a steel ring in a block fire pit?
It is strongly recommended. Concrete wall blocks are not made for direct flame and can crack or spall; a steel ring takes the heat and keeps the inside diameter round.
What size fire pit ring should I buy?
Pick the inside diameter you want — 36 to 44 inches suits most backyard wood fires — and build the block ring around it with a small gap for expansion.
What gravel goes in the bottom of a fire pit?
Clean drainage stone such as crushed stone or pea gravel, a few inches deep, so rain drains away instead of pooling in the ash. The fire pit calculator works out the amount.
How wide should the gravel around a fire pit be?
At least 3 feet of non-combustible surface on every side; 5 to 7 feet also gives room for chairs. The fire pit calculator's default is 5 feet.
Can I use river rock in a fire pit?
Avoid it inside the pit: wet river rock and porous stone can crack or burst when heated. River rock is fine in the surround, away from the flame.
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