Every base in Rust is a stack of floors. The floor you stand on in your loot room is the ceiling of the room below it, and the floor above your head is the last thing between a roof raider and your tool cupboard. That makes floors one of the most raided building pieces in the game, and one of the most ignored when people plan their upgrades.
This Rust floors guide covers all four floor pieces (square floor, triangle floor, floor frame and triangle floor frame), what each one costs at every tier, health and raid cost, where the soft side is, what you can put in a floor frame, and upkeep and decay. For the bigger picture of tiers, foundations and walls, see our Rust building guide.
- Floor Types
- Build Cost
- Health
- Raid Cost
- Soft Side
- Floor Frames
- Upkeep and Decay
- How to Build
- Tips
- FAQ
Every Floor Type in Rust
Floors are building blocks, not items. You place them with the Building Plan as twig, then upgrade them with the Hammer, exactly like walls and foundations. A floor has to snap to something that supports it: the top of a wall, a foundation edge or another floor. There are four shapes, and every one comes in all five tiers.
- Floor. The full square tile. This is your ceiling over a 1×1 and the standard second storey piece.
- Triangle Floor. Half a square, for triangle foundations, triangle bases and honeycomb gaps. Costs half as much and has the same health.
- Floor Frame. A square floor with a hole in the middle. On its own it is just an opening. Fill it with a ladder hatch for vertical access or a floor grill to let heat and light through.
- Triangle Floor Frame. The triangle version, which takes the triangle ladder hatch, armored triangle ladder hatch and floor triangle grill.
How Much Floors Cost in Rust
A full floor costs exactly half of a wall at the same tier, and a triangle floor costs half of a floor. Floor frames cost the same as a full floor, even though they have a hole in them. Upgrading never refunds what you spent on the lower tiers, so go straight from twig to your final grade.
| Tier | Floor | Triangle floor | Floor frame | Triangle frame |
|---|---|---|---|---|
| Twig | 25 wood | 13 wood | 25 wood | 13 wood |
| Wood | 100 wood | 50 wood | 100 wood | 50 wood |
| Stone | 150 stone | 75 stone | 150 stone | 75 stone |
| Sheet Metal | 100 metal fragments | 50 metal fragments | 100 metal fragments | 50 metal fragments |
| Armored | 13 HQM | 7 HQM | 13 HQM | 7 HQM |
For comparison, a wall is 200 wood, 300 stone, 200 metal fragments or 25 HQM. That is why a full ceiling of sheet metal over a 2×2 (four floors, 400 fragments) costs the same as just two sheet metal walls. If you are farming for an upgrade, our metal fragments guide covers the fastest ways to get them.
Floor Health per Tier
Floors have exactly the same health as a wall of the same tier, and triangle floors and floor frames match the full floor. Cheaper to build, just as tough.
| Tier | Health (all floor pieces) | Same as |
|---|---|---|
| Twig | 10 HP | Twig wall |
| Wood | 250 HP | Wooden wall |
| Stone | 500 HP | Stone wall |
| Sheet Metal | 1,000 HP | Metal wall |
| Armored | 2,000 HP | Armored wall |
Floor Raid Cost
Because the health matches, so does the raid cost. A stone floor takes the same 2 C4 as a stone wall, and a square floor and a triangle floor of the same tier take exactly the same number of explosives. Numbers below are for one floor, hitting it from the side the explosive lands on.
| Explosive | Wood floor | Stone floor | Sheet metal floor | Armored floor |
|---|---|---|---|---|
| C4 | 1 | 2 | 4 | 8 |
| Rockets | 2 | 4 | 8 | 15 |
| Satchel charges | 3 | 10 | 23 | 46 |
| Explosive 5.56 ammo | 49 | 185 | 400 | 799 |
| Beancan grenades | 13 | 46 | 112 | 223 |
| MLRS rockets | 1 | 3 | 6 | 12 |
| Fire | 1 incendiary rocket or 4 molotovs | Immune | Immune | Immune |
The cheapest sulfur option for a stone floor is explosive ammo (185 rounds, about 4,600 sulfur) or 2 C4 (4,400 sulfur). On sheet metal and armored, C4 wins. A wooden floor is the one tier you can burn: one incendiary rocket or four molotovs. Our Rust raid calculator adds up a whole route for you.
The Soft Side of a Floor
Every building block in Rust has a hard side and a soft side, and melee weapons do around ten times the damage to the soft side. On a wall you choose which way it faces. On a floor you do not: the soft side is always underneath, and the weak spot is the centre of the tile as you look up at it from the room below. Hit even a little off centre and you are back on the hard side.
| Floor | Pickaxe from above (hard) | Pickaxe from below (soft) |
|---|---|---|
| Wood | 11 pickaxes, about 16m | 1 pickaxe, about 1m 30s |
| Stone | 72 pickaxes, about 1h 45m | 7 pickaxes, about 10m 30s |
| Sheet Metal | 345 pickaxes, about 8h 25m | 35 pickaxes, about 51m |
| Armored | 690 pickaxes, about 16h 50m | 69 pickaxes, about 1h 41m |
In practice this matters for two things. If someone gets inside one of your rooms, every ceiling above them is soft side, so a stone ceiling can be picked through in about ten minutes. And if you stack loot rooms, the floor of the top room is soft from the room below, so an outer room that gets breached opens the next one up. Explosives do the same damage from either side, so the soft side only changes melee raids.
What Goes in a Floor Frame
A floor frame is a floor with a hole in it. The frame itself has full floor health, but the hole is only as strong as what you put in it. Four things fit.
| Item | Craft cost | Workbench | Health | Raid cost |
|---|---|---|---|---|
| Ladder Hatch | 300 metal fragments, 3 gears, 1 wooden ladder | Level 2 | 250 HP | 1 C4, 2 rockets, 4 satchels |
| Triangle Ladder Hatch | 300 metal fragments, 3 gears, 1 wooden ladder | Level 2 | 250 HP | 1 C4, 2 rockets, 4 satchels |
| Armored Ladder Hatch | 35 HQM, 6 gears, 1 wooden ladder | Level 3 | 1,000 HP | 3 C4, 5 rockets |
| Floor Grill | 75 metal fragments | Level 1 | 250 HP | 1 C4, 2 rockets, 4 satchels |
| Floor Triangle Grill | 75 metal fragments | Level 1 | 250 HP | 1 C4, 2 rockets, 4 satchels |
- Ladder hatch. Opens into a ladder so you can climb between floors. Our ladder hatch guide covers cost, raid cost and base design. Lock it with a code lock. It is the classic roof access and the classic weak point.
- Armored ladder hatch. Added in the April 2, 2026 Spring Clean update, the top tier hatch has 1,000 HP, the same as an armored door, and sits right after armored doors on the tech tree. There is a triangle version too.
- Floor grill. A metal grate you can see and shoot through. The game describes it as perfect for placing above a large furnace, because the furnace is tall enough to need the floor above it opened up. Grills are also handy for shooting floors in a compound.
Floor Upkeep and Decay
Upkeep is charged from your tool cupboard, and since it is a share of the build cost, a floor costs half the upkeep of a wall. A triangle costs half a floor. The range grows with how big your base is: small bases pay the low end.
| Tier | Floor upkeep a day | Triangle upkeep a day | Decay with no upkeep |
|---|---|---|---|
| Twig | 3 to 8 wood | 1 to 4 wood | 1 hour |
| Wood | 10 to 33 wood | 5 to 17 wood | 3 hours |
| Stone | 15 to 50 stone | 8 to 25 stone | 5 hours |
| Sheet Metal | 10 to 33 metal fragments | 5 to 17 metal fragments | 8 hours |
| Armored | 1 to 4 HQM | 1 to 2 HQM | 12 hours |
Floor frames pay the same upkeep as a full floor. The Rust decay guide explains how upkeep tiers scale with base size and what happens when the cupboard runs dry.
How to Build and Upgrade a Floor
- Craft a Building Plan and a Hammer. Both are default blueprints, 20 wood for the plan and 100 wood for the hammer.
- Pick the floor shape. Hold right click with the Building Plan and choose Floor, Triangle Floor, Floor Frame or Triangle Floor Frame.
- Snap it in place. Floors attach to the top of walls, to foundation edges, or next to another floor. If the ghost turns red there is not enough support.
- Place your tool cupboard. You need building privilege to upgrade.
- Upgrade with the Hammer. Hold right click on the floor and pick Wood, Stone, Metal or Armored. You need the full material cost in your inventory.
Floor Building Tips
- Upgrade the ceilings over loot first. Roof raiders come down, not in. Treat the floor above your TC and loot like an outer wall.
- Stone is the value tier. 500 HP for 150 stone is the best health per resource in the game for a ceiling.
- Match the hatch to the floor. A 250 HP ladder hatch in a sheet metal floor halves the raid cost. Use armored hatches where it counts.
- Remember the soft side faces down. Do not leave a stone ceiling over a room that is easy to get into.
- Grill over large furnaces. A floor grill lets a tall furnace sit under the floor above it.
- A floor over your vehicles. Any floor or roof tile overhead switches a parked minicopter from its 8 hour outdoor decay to 48 hours.
Rust Floors FAQ
How much does a stone floor cost in Rust?
A stone floor costs 150 stone, half the 300 stone of a stone wall. A stone triangle floor costs 75 stone, and a stone floor frame costs 150.
How much does a sheet metal floor cost in Rust?
A sheet metal floor costs 100 metal fragments, and a sheet metal triangle floor costs 50. A sheet metal wall is 200, so floors are half price.
How much HP does a floor have in Rust?
The same as a wall of the same tier: 10 HP twig, 250 HP wood, 500 HP stone, 1,000 HP sheet metal and 2,000 HP armored. Triangle floors and floor frames have the same health as a full floor.
How many C4 does it take to break a floor in Rust?
One C4 for a wooden floor, 2 for stone, 4 for sheet metal and 8 for armored. That is the same as a wall of the same tier, and triangle floors take the same amount.
Where is the soft side of a floor in Rust?
Underneath. The soft side of a floor is the ceiling side, and the weak spot is the centre of the tile as you look up at it. Melee does about ten times the damage there, so a stone ceiling can be picked through in about 10 minutes from below.
What is a floor frame in Rust?
A floor frame is a floor with a square hole in the middle. It costs and has the same health as a full floor. You fill the hole with a ladder hatch, an armored ladder hatch or a floor grill. The triangle floor frame works the same way with the triangle versions.
Are triangle floors weaker than square floors?
No. A triangle floor has the same health and takes exactly the same number of explosives as a square floor of the same tier, but it costs half as much to build and half as much upkeep.
How do you raid a ladder hatch in Rust?
A normal ladder hatch has 250 HP and takes 1 C4, 2 rockets or 4 satchel charges. An armored ladder hatch has 1,000 HP and takes about 3 C4 or 5 rockets, the same as an armored door.
Sources and Further Reading
- Floor health, decay, upkeep and per-tool raid numbers: rustlabs building data, cross-checked with RustClash, Stone Floor Frame and RustHelp, Stone Floor
- Soft side position: RustClash, Wooden Floor
- Ladder hatch recipe: Facepunch Rust Wiki, Ladder Hatch
- Armored ladder hatch: Rustafied, Armored Hatch update and RustHelp, Armored Ladder Hatch