Start Building Walls With the Right Unlocks
Walls do more than make your workshop look finished: they create reliable vertical supports for floors, roofs, and larger multi-level factory layouts. If your floor placement turns yellow or red, your wall and pillar structure is usually the first thing to inspect.
The building system is easy to miss because basic factory progression can take priority over construction. Before trying to place walls on newly purchased ground, make sure you have progressed far enough to access the construction tools.
| Requirement | What it does | Why it matters for walls |
|---|---|---|
| Workbench research | Opens access to non-production building options | It is the route to construction equipment rather than a standard production unlock |
| Level 3 progression | Reaches the reported Workbench research point | Players may not see the needed option during early progression |
| Building Tool | Enables direct construction placement | Use it for walls, floors, supports, and structural pieces |
| Building Tool upgrade | Expands building capability after crafting the tool | Reported as necessary for ground-level building options |
Community guidance indicates that you should research the Workbench at Level 3, craft the Building Tool, and upgrade the tool to Level 2. If you only see supported floor pieces or cannot place a wall where expected, check these progression steps before redesigning your factory.
Open the current build interface after unlocking the tool and look through its categories. The live menu is the best reference for available wall pieces, costs, placement controls, and any version-specific changes.
Place Walls as a Structural Frame
For most buildings, begin with a simple frame instead of filling every space with wall tiles. Vertical pillars and walls can both provide support, so you can choose a layout that fits your factory’s appearance and machine access.
Place your first wall or pillar on solid ground. Then build straight upward from that same point whenever you want to support higher floors. A wall that shifts sideways between levels may look connected, but it does not provide the same dependable vertical support chain.
A practical first room can use walls at the corners, with extra wall sections or pillars along long edges. Add horizontal floor tiles only after the support points are in place.
| Build choice | Best use | Main advantage | Watch for |
|---|---|---|---|
| Wall tiles | Enclosing rooms and making solid exterior edges | Adds structure while defining a room | Keep wall sections aligned vertically |
| Vertical pillars | Open factory areas and machine-heavy spaces | Leaves belts, pipes, and machines visible | Place enough of them to limit floor span |
| Mixed walls and pillars | Shops, workshops, and attractive production rooms | Balances access, appearance, and support | Check every upper support path |
| Full block fill | Small, simple structures | Straightforward to understand | Uses more materials than a framed design |
Use walls where you want an enclosed façade, a divider between production areas, or a continuous support line. Use pillars where you need open sightlines or room to route belts. Neither choice is automatically stronger if both are supported continuously from the ground.
A useful rule is to build the support system first and decorate second. That sequence makes it easier to see whether the structure is valid before doors, windows, roof pieces, and machinery clutter the view.
Keep Floors and Roofs Supported
The central rule for vertical construction is continuity. A support needs a clear path from the ground to the height where it is carrying a floor or roof. Do not assume a nearby wall can “share” support with a pillar that stops short or shifts position.
When you attempt to place floor tiles, placement feedback helps diagnose the structure:
- Green placement generally means the section has good support.
- Yellow placement signals a weaker or borderline section that deserves a closer check.
- Red placement means the piece cannot be built in that location.
- A floor that works near a wall but fails farther away is usually exceeding the supported span.
| Symptom | Likely cause | Practical fix |
|---|---|---|
| Floor turns red several tiles from a wall | The span reaches beyond available support | Add a wall or pillar beneath the unsupported area |
| Upper floor seems connected but will not extend far | A pillar or wall is interrupted lower down | Stack supports directly over their ground-level base |
| Roof has small uncovered gaps | Large tiles do not fit the remaining supported width | Fill the gaps with smaller floor tiles |
| A design works on one level but fails higher up | Supports drifted sideways between stories | Repeat the same support positions on every level |
Large floor tiles are efficient for covering broad areas, but they may leave narrow spaces near the edge of their supported range. Smaller quarter-size tiles can fill those spaces without forcing a complete redesign.
Build one story at a time. Finish the lower supports, test several floor placements, then continue upward. This catches structural mistakes before you build an entire roof or move machines onto an unstable-looking level.
For a tall factory, avoid making every story a new layout. Repeating the same structural grid is easier to expand, easier to blueprint, and much easier to troubleshoot later.
Plan Rooms, Openings, and Repeatable Builds
Once the frame is stable, turn it into useful rooms. Walls can separate customer-facing shop areas from noisy production, create storage lanes, or make a compact workshop feel organized. Leave deliberate openings for belts, movement, and future changes rather than sealing every edge immediately.
Wall variants such as doors, windows, and triangular roof end pieces may be selected through the building interface rather than placed as entirely separate systems. If you cannot find a desired variant, return to the relevant wall or roof item in the build menu and inspect its available placement options.
Use this order for a clean build:
- Mark the room corners with walls or pillars.
- Continue each support column straight upward to the intended ceiling height.
- Add floor tiles and test the outer edges for valid placement.
- Leave openings for doors, belts, shelves, or stairs.
- Add windows, roof ends, and other decorative pieces after the structure works.
- Save a blueprint once the room is proven useful.
Blueprints are particularly valuable for repeating a support frame across multiple machine stacks. Select the completed structure with the blueprint command, choose the full height you need, and copy it for the next section. Saved blueprints can also keep a reliable wall-and-floor module ready for later expansions.
| Blueprint approach | When to use it | Benefit |
|---|---|---|
| Small support module | You are still experimenting with layouts | Lets you test walls, beams, and floor spacing cheaply |
| Complete room frame | You need repeated workshops or storage bays | Keeps support positions consistent |
| Machine stack shell | You are building over non-stackable machines | Creates a repeatable platform above equipment |
| Tileable production section | You expect to expand one production line repeatedly | Extends belts and structure in a predictable pattern |
For machine stacks, make sure every part that touches the ground is represented correctly in the structure above it. Beams can cross over machinery and reduce the number of blocks needed, but they still need to connect to valid supports. A roof or floor platform should not rely on a decorative-looking connection alone.
If you are building stairs from shelves or similar pieces, test the path before committing to a larger structure. Vertical access is part of room planning, especially when upper floors hold shop space, storage, or production machines.
FAQ
How do I unlock walls in Alchemy Factory?
For alchemy factory how to build walls, first progress to the reported Level 3 Workbench research, craft the Building Tool, and upgrade it to Level 2. Then check the build menu for wall and related construction pieces.
Why can I build some floors but not walls on the ground?
You may have access to supported floor components before unlocking full direct construction. Verify your Workbench research and Building Tool upgrade, then reopen the building categories.
Can walls support upper floors?
Yes. Walls can act as vertical supports when they form an unbroken line from the ground to the floor or roof they support. Pillars can serve the same structural role.
Why does my floor placement become yellow or red?
Your floor is likely approaching or exceeding its supported span. Add supports beneath it, keep wall or pillar columns aligned from bottom to top, and use smaller floor tiles for narrow gaps.
Should I use walls or pillars?
Use walls for enclosed rooms, dividers, and solid exterior surfaces. Use pillars for open factory floors and easier machine access. A mixed frame usually gives the best balance of support and usability.