Fust Survival Building Guide: Pieces, Costs and Upgrades

Twig placement costs are paid in Wood. The 10X Modded Stone placement costs require both Stones and Wood; add the two listed materials for the selected piece. Hammer upgrade costs apply to an existing piece and are separate from initial placement.

Choose the shape for its job: foundations establish the footprint, walls enclose it, floors cover upper levels or roof openings, and stairs provide access between levels. A Doorway supports a Wooden Door; a Wall Frame supports double doors. Window openings can accept Wooden Window Shutters.

The tools and fittings serve different purposes:

• Building Plan: place the structural pieces.
• Hammer: upgrade, repair, rotate, or demolish individual pieces. See Hammer controls.
• Tool Cupboard: manage building authorization, upkeep, and base-wide upgrades. Keep it supplied to prevent decay; see Tool Cupboard and upkeep.
• Doors and locks: close and secure entrances after their supporting pieces are built. See doors, locks, and airlocks.

Twig is easy to destroy. Use it to establish a structure when needed, then strengthen it early.

A Building Plan costs 20 Wood and requires no workbench. Crafting takes 1 second in the 10X Modded recipe configuration or 2 seconds in the other recipe configuration.

1. Press Q to open Crafting, select Building Plan, choose a quantity, and click CRAFT.
2. Move the finished plan into your hotbar and equip it. Carry the materials for the pieces you intend to place.
3. Hold RMB or X, move the cursor onto a piece, and release to select it. You can also click RMB and then click a piece. Choose Twig, Wood, or Stone in the wheel.
4. Aim at suitable ground to preview a foundation. Use R to rotate it and V/Z to raise or lower it, then click LMB to place it.
5. Aim at a foundation edge or wall top to attach walls and wall frames. Follow the R Rotate/Flip prompt to set their orientation.
6. Build the appropriate entrance support, then add floors across the wall tops to form the roof. Doors are separate items installed afterward.

Favoriting the Building Plan recipe makes it available through Quickcraft when you have the required materials. For queue and crafting-menu help, see crafting and workbenches.

In the 10X Modded recipe configuration, a Hammer costs 100 Wood, takes 1 second to craft, and requires no workbench. Use it when you want to strengthen a particular piece, such as a newly placed roof patch.

Upgrade an individual piece

1. Equip the Hammer and aim at the piece.
2. Press RMB to open its upgrade menu.
3. Choose Wood, Stone, Sheet Metal, or Armored, with enough of the required material available.
4. After selecting a grade, follow the displayed action. When the prompt reads LMB Sheet Metal, left-click applies that selection to the targeted piece; RMB More reopens the options.

A successful upgrade displays the selected material and updates the piece’s durability. Costs depend on the piece:

Sheet Metal gives both of these pieces 1,000 HP. An Armored Wall Frame has 2,000 HP. The Floor is cheaper to upgrade than the Wall Frame, so budget by the actual pieces rather than treating every part of the base as equally expensive.

For repairs, aim at a damaged piece and use LMB Repair when that action is displayed. Not damaged means the targeted piece does not need repair.

Read the whole-base upgrade requirement

1. Open your Tool Cupboard with E and use AUTHORIZE under AUTHORIZED PLAYERS if you are not already authorized.
2. Open UPGRADE BASE and select WOOD, STONE, SHEET METAL, or ARMORED (HQM).
3. Read the covered piece count and total material requirement for that grade.
4. Supply the required materials, then use UPGRADE BASE for the selected grade. A not enough message means the available materials do not cover it.

Use the displayed total for your current base. Different shapes and existing grades make a single average cost per piece unreliable. If every covered piece is already Wood or better, selecting WOOD can report that the requirement is already met.

Authorization and ongoing maintenance are covered in the Tool Cupboard guide.

Read the message beside the placement controls and change the condition it identifies. Shape, support, clearance, distance, and materials can each prevent placement.

For Building blocked, first look for a more specific placement message. The general label alone does not identify which condition needs changing.

Before placement, use R with the Building Plan to rotate or flip the preview when that control is offered. For an existing piece, equip the Hammer, aim at it, and open the RMB menu. Select Rotate or Demolish when available. These actions can display countdowns; use the current piece’s menu to see the time remaining.

Close a roof opening

Use Floor for a square opening and Triangle Floor for a triangular one. To place and strengthen a square Twig roof patch:

1. Equip the Building Plan, select Twig → Floor, and aim above the walls at the opening.
2. Spend 25 Wood and press LMB to place the floor.
3. Equip the Hammer and target the new piece.
4. Open the upgrade menu and select Sheet Metal for 100 Metal Fragments, then apply it using the displayed action.

This patch uses 25 Wood plus 100 Metal Fragments in total. The new Twig Floor has 50 HP; the Sheet Metal Floor has 1,000 HP. Strengthening the patch keeps the freshly closed opening from remaining a weak Twig section.

Choose access that fits the structure: Stairs create an internal route, a Wooden Ladder lets you climb a wall, and an installed Triangle Ladder Hatch opens a passage between levels.

Stairs

Select STONE → Stairs in the Building Plan wheel. In the 10X Modded configuration, one Stone staircase costs 300 Stones and 50 Wood. Rotate it with R, leave an opening above the route, and place it with LMB. Plan the stair opening before closing the upper floor so you can keep a usable path to the next level.

Wooden Ladder

1. Select a Wooden Ladder on your hotbar and aim at a wall.
2. Press R to rotate it; hold Shift while rotating for 45-degree rotation.
3. Press LMB to place it, then climb to the roof.

If the preview says Aim at a wall, move it onto a valid wall surface. To retrieve a placed ladder, target it from nearby and use E PICK UP. Exterior climbs can expose you to gunfire, so use an internal route when you need protected access within your own base.

Triangle Ladder Hatch

At an installed Triangle Ladder Hatch, press E OPEN to open the passage. Once open, the prompt changes to E CLOSE. Close it after passing through when you want the opening shut.

• Start compact. A Stone 2×2 gives you a manageable shell to enclose and equip before expanding. Reserve space for essential facilities and a clear entrance route; follow the solo starter-base layout.
• Choose the entrance before building its frame. Use a Doorway for a Wooden Door or a Wall Frame for a double door. Install a lock and consider a second-door airlock to separate the interior from the outside. See doors and base defense.
• Budget for upkeep as well as construction. After expanding, read the Tool Cupboard’s current daily requirements and replenish its resources. Unpaid upkeep allows gradual decay; use the upkeep guide to manage protection and repair status.
• Use vertical storage before adding more rooms. Shelves let you organize boxes above one another while preserving walking space. See storage boxes and shelf layouts for placement and capacity choices.