Upgrading

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Current game stage: 1

Description[edit | edit source]

Upgrading is a Game Mechanic that describes the process of improving a Block in order to make it stronger. In order to upgrade a Block, one must have the materials needed for the upgrade in the character inventory and have an appropriate Construction Tool equipped. An upgradeable Block is targeted with the crosshairs, and clicking the right mouse-button will initiate the upgrading process.

Appropriate Tools[edit | edit source]

There are only a handful of tools that can upgrade blocks, some easier to obtain compared to others.

Both stone axes will upgrade 1/3 every use, requiring three uses to completely upgrade a block. Claw hammer upgrades 1/2 every use, requiring two uses to completely upgrade a block.
The nailgun upgrades blocks instantly with a single use. This, however, means that the player should be very careful when repairing blocks with it as they can be accidentally upgraded to a higher level.


Upgrade Materials[edit | edit source]

These are the different upgrade materials that could be used during the process.

  • Woodresource.png Wood is the most basic upgrade material. It is used to upgrade Wood Frames and other wooden blocks, traps and furniture.
  • ScrapIron.png Iron is sometimes used as an upgrade material after wood and when upgrading Iron Frames. The upgrades offer a bit higher durability than wooden blocks.
  • ForgedIron.png Forged Iron is used to upgrade especially furniture, such as doors and different traps.
  • Cobblestones.png Cobblestone Rocks are used to upgrade blocks after wood to Cobblestone Blocks. They offer a lot more durability than wooden blocks making them valuable for defending against the zombies.
  • ConcreteMix.png Concrete Mix is used to upgrade cobblestone blocks to Concrete Blocks. After successfully upgrading a block with concrete mix, the player must wait for a certain time for the concrete to dry to upgrade it again.
  • IngotSteel.png Forged Steel is the last resource used to upgrade concrete blocks and other furniture, such as doors and hatches.

Upgrade Process[edit | edit source]

Flowchart indicating the upgrade path of all base building blocks. Arrows indicate whether a block can be upgraded, downgraded or destroyed.
Flowchart indicating the upgrade path of all base building blocks and the resource cost for upgrading them.

Resource Efficiency[edit | edit source]

This is a table containing the resources needed to upgrade from a craftable block to Steel Blocks. This includes the base cost of the craftable block.
Note: These amounts are for the base crafting, certain perks such as the Advanced Engineering lower the amount of resources needed.

Start From Woodresource.png ScrapIron.png ClayLump.png RockSmall.png Cobblestones.png ConcreteMix.png IngotSteel.png
Wood Frames 10 10 20 10
Scrap Iron Frames 95 4 20 10
Flagstone Blocks 14 20 10
Brick Blocks 12 2 20 10
Rebar Frames 5 0.2 20 10
Wet Concrete Blocks 20 10

In terms of the most basic resources.

Start From Woodresource.png ScrapIron.png ClayLump.png RockSmall.png
Wood Frames 10 200 20 64
Scrap Iron Frames 295 24 64
Flagstone Blocks 200 34 78
Brick Blocks 200 32 66
Rebar Frames 205 20.1 64
Wet Concrete Blocks 200 20 64

To summarize the tables: Most cost-efficient way of building concrete/steel blocks is through the wet concrete blocks. However, the player has to consider required workstations and crafting time when choosing the block to go with. Upgrading blocks also gives a decent amount of Experience, which should be notified as well. Blocks, such as the wet concrete block, also can't be picked up in the event of misplacement and have to be destroyed, whereas frames, such as rebar frames, can be freely picked up after placement.

Wood[edit | edit source]

This upgrade path starts with Wood Frames as the base block and ends with Steel Blocks.

Wood Frames Upgrade Path
Block Upgrade Resource Quantity Result
WoodFrame.png Wood Frame Woodresource.png Wood x4 OldWood.png Wood Block
OldWood.png Wood Block Woodresource.png Wood x4 ReinforcedWood.png Reinforced Wood Block
ReinforcedWood.png Reinforced Wood Block Cobblestones.png Cobblestone Rocks x10 Cobblestone.png Cobblestone Block
Cobblestone.png Cobblestone Block ConcreteMix.png Concrete Mix x10 Concrete.png Concrete Block
Concrete.png Concrete Block ConcreteMix.png Concrete Mix x10 ConcreteReinforced.png Reinforced Concrete Block
ConcreteReinforced.png Reinforced Concrete Block IngotSteel.png Forged Steel x10 SteelBlock.png Steel Block

Stone[edit | edit source]

This upgrade path starts with Flagstone as the base block and ends with steel blocks.

Flagstone Upgrade Path
Block Upgrade Resource Quantity Result
Flagstone.png Flagstone Block Cobblestones.png Cobblestone Rocks x10 Cobblestone.png Cobblestone Block
Cobblestone.png Cobblestone Block ConcreteMix.png Concrete Mix x10 Concrete.png Concrete Block
Concrete.png Concrete Block ConcreteMix.png Concrete Mix x10 ConcreteReinforced.png Reinforced Concrete Block
ConcreteReinforced.png Reinforced Concrete Block IngotSteel.png Forged Steel x10 SteelBlock.png Steel Block

Iron[edit | edit source]

This upgrade path starts with Iron Frames as the base block and ends with steel blocks.

Iron Frame Upgrade Path
Block Upgrade Resource Quantity Result
ScrapIronFrame.png Scrap Iron Frame ScrapIron.png Iron x40 ScrapMetalWall.png Scrap Iron Block
ScrapMetalWall.png Scrap Iron Block ScrapIron.png Iron x40 ReinforcedScrapMetalWall.png Reinforced Scrap Iron Block
ReinforcedScrapMetalWall.png Reinforced Scrap Iron Block ConcreteMix.png Concrete Mix x10 Concrete.png Concrete Block
Concrete.png Concrete Block ConcreteMix.png Concrete Mix x10 ConcreteReinforced.png Reinforced Concrete Block
ConcreteReinforced.png Reinforced Concrete Block IngotSteel.png Forged Steel x10 SteelBlock.png Steel Block

Concrete[edit | edit source]

Concrete has two ways of upgrading blocks to steel blocks. The first upgrade path starts with Rebar Frames as the base block and ends with steel blocks.

Rebar Frame Upgrade Path
Block Upgrade Resource Quantity Result
RebarFrame.png Rebar Frames ConcreteMix.png Concrete Mix x20 ConcreteReinforced.png Reinforced Concrete Block
ConcreteReinforced.png Reinforced Concrete Block IngotSteel.png Forged Steel x10 SteelBlock.png Steel Block


The second upgrade path starts with Wet Concrete Blocks as the base block and ends with steel blocks.

Wet Concrete Upgrade Path
Block Upgrade Resource Quantity Result
PouredConcreteBlock.png Wet Concrete Block ConcreteMix.png Concrete Mix x10 ConcreteReinforced.png Reinforced Concrete Block
ConcreteReinforced.png Reinforced Concrete Block IngotSteel.png Forged Steel x10 SteelBlock.png Steel Block

Doors[edit | edit source]

Secure Wooden Door[edit | edit source]

This upgrade path starts with a Secure Wooden Door as the base block and ends with Vault Door_v3

Secure Wooden Door Upgrade Path
Block Upgrade Resource Quantity Result
SecureWoodDoor.png Secure Wooden Door Woodresource.png Wood x4 ReinforcedSecureWoodDoor.png Reinforced Secure Wooden Door
ReinforcedSecureWoodDoor.png Reinforced Secure Wooden Door ScrapIron.png Iron x12 MetalReinforcedWoodenDoor.png Metal Reinforced Wooden Door
MetalReinforcedWoodenDoor.png Metal Reinforced Wooden Door IronDoor1 v1.png Iron Door x1 IronDoor1 v1.png Iron Door
IronDoor1 v1.png Iron Door ForgedIron.png Forged Iron x10 IronDoor1 v2.png Iron Door1 v2
IronDoor1 v2.png Iron Door1 v2 ForgedIron.png Forged Iron x10 IronDoor1 v3.png Iron Door1 v3
IronDoor1 v3.png Iron Door1 v3 VaultDoor01.png Vault Door x1 VaultDoor01.png Vault Door
VaultDoor01.png Vault Door IngotSteel.png Forged Steel x12 VaultDoor02.png Vault Door v2
VaultDoor02.png Vault Door v2 IngotSteel.png Forged Steel x12 VaultDoor03.png Vault Door v3