HP, cost & what destroys it — per grade
whole floor / ceiling| Grade | HP | Expl. resist | Upgrade cost | Rocket | C4 | Satchel | Explosive Ammo |
|---|---|---|---|---|---|---|---|
| Twig | 10 | 0% | 50 Wood | ×1 | ×1 | ×1 | ×2 |
| Wood | 250 | 10% | 200 Wood | ×2 | ×1 | ×4 | ×56 |
| Stone | 500 | 50% | 300 Stones | ×4 | ×2 | ×12 | ×200 |
| Sheet Metal | 1,000 | 50% | 200 Metal Fragments | ×8 | ×4 | ×23 | ×399 |
| Armored | 2,000 | 50% | 25 High Quality Metal | ×15 | ×8 | ×46 | ×798 |
HP, explosion resistance, upgrade cost and the raid counts are set by the construction grade, not the block type — a floor / ceiling has the same values as any other block of that grade. Raid counts are the whole-block amounts of each explosive needed (fewer = faster); triangle variants take roughly half. All values from the Rust game files.
Hatches & grills that fit the floor frame
Armored Ladder Hatch
1,000 HP
Armored Triangle Ladder Hatch
1,000 HP
Ladder Hatch
250 HP
Triangle Ladder Hatch
250 HP
Floor grill
250 HP
Fit one of these into the floor / ceiling for a sealable opening — each has its own HP and raid cost (open its page). Single doors shown; most also come as double-door variants.