Building tiers & upgrade costs
Cost, hit points and explosion resistance for every building grade, Twig through Armored.
| Grade | HP | Resist | Decay | Cost per block | 🚀 | C4 | Satchel | Beancan | Ammo |
|---|---|---|---|---|---|---|---|---|---|
| Twig | 10 | 0% | 1h |  50 Wood | 1 | 1 | 1 | 1 | 2 |
| Wood | 250 | 10% | 3h | 200 Wood | 2 | 1 | 3 | 13 | 56 |
| Stone | 500 | 50% | 5h |  300 Stones | 4 | 2 | 10 | 46 | 200 |
| Sheet Metal | 1,000 | 50% | 8h |  200 Metal Fragments | 8 | 4 | 23 | 112 | 399 |
| Armored | 2,000 | 50% | 12h |  25 High Quality Metal | 15 | 8 | 46 | 223 | 798 |
Every building block costs the same per grade — a stone wall, foundation, doorway or floor all cost 300 stone. 🚀 / C4 / Satchel / Ammo are the explosives to destroy one block of that grade, derived from its in-game HP and explosion resistance (Stone = 4 rockets, Armored = 15 rockets / 8 C4 — canonical). Decay = how long a block survives with no Tool Cupboard upkeep (out of TC range). Upkeep (the materials a Tool Cupboard drains to keep a base from decaying) scales with your total building-block count, not the grade alone — there's no fixed per-block figure, so check the live cost on your Tool Cupboard in-game.
Explosives aren't the only way in — siege weapons (battering ram, catapult, ballista) can also breach walls.