Factorio Mall Guide - How to Build an Automation Supply Hub

How to build a mall in Factorio: an automated supply hub that builds belts, inserters, assemblers, and everything else so you never hand-craft again. Blueprint-ready layouts for early, mid, and late game.

I hand-crafted everything for my first 30 hours of Factorio. Yellow belts, blue inserters, assembling machines, pipes - all by hand. I spent more time standing at a crafting window than building my factory. Then I built a mall, and my playtime efficiency doubled overnight. Here's exactly how to set one up and never look back.

TL;DR: A mall is a section of your factory that produces building materials automatically. It uses a main bus of iron, copper, and steel with assemblers that output to passive provider chests. Build an early-game mall after green science and upgrade to a bot-based mall after unlocking logistic robots. The core items to automate: belts, underground belts, splitters, inserters, assembling machines, furnaces, pipes, and power poles.

Why Every Factorio Player Needs a Mall

A mall isn't a luxury - it saves more time than any other single build in the game. Here's the math:

ActivityHand-craft timeMall retrieval timeTime saved per use
Grab 100 belts~40 seconds crafting3 seconds walking37 seconds
Grab 50 inserters~25 seconds3 seconds22 seconds
Grab 20 assemblers~60 seconds5 seconds55 seconds
Build new outpostNeed all items = 5+ mins crafting20 seconds grabbing5+ minutes

Over a typical playthrough, a mall saves hours of real time. It also means you don't carry raw materials - you carry finished building supplies.

Early-Game Mall (Pre-Robots)

The early mall runs on belts. Build it after green science automation, near your main bus.

TL;DR layout: Run iron, copper, and steel belts past a row of assemblers. Each assembler makes one item type and outputs to a chest. Take belts, inserters, and assemblers from the first section, then furnaces and mining drills, then pipes and power poles.

Belt section (left to right on the bus):

  1. Transport belt - 1 assembler, feeds from iron. Output to a steel chest.
  2. Underground belt - 1 assembler, needs iron. Output chest. Note: each underground belt is 2 items.
  3. Splitter - 1 assembler, iron + 1 gear. Output chest.
  4. Fast transport belt - research Logistics 2 first. Needs iron + gears, faster than basic.

Inserter section: 5. Yellow inserter - 1 assembler, iron plate + 1 gear. Highest volume item in the game. 6. Long-handed inserter - 1 assembler, iron + gear. Output chest. 7. Fast inserter - 1 assembler, iron + gear + electronic circuit. Output chest.

Production section: 8. Assembling machine 1 - 1 assembler, iron + gear + circuit. Output chest. 9. Assembling machine 2 - 1 assembler, iron + 3 gear + 3 circuit. Output chest (if researched). 10. Stone furnace - 1 assembler, stone. Output chest. 11. Steel furnace - 1 assembler, steel. Output chest (if researched). 12. Electric mining drill - 1 assembler, iron + gear + circuit. Output chest.

Infrastructure section: 13. Pipe - 1 assembler, iron. Output chest. You use more pipes than you expect. 14. Small electric pole - 1 assembler, iron + wood. Output chest. 15. Medium electric pole - 1 assembler, iron + copper. Output chest.

The early mall is a bus hog. The yellow inserter assembler alone consumes 0.5 iron plates and 0.25 gears per second. With 15+ assemblers, the mall pulls ~10 iron/sec from your bus. If your iron supply is marginal, build a dedicated iron belt for the mall.

Mid-Game Mall (With Logistic Robots)

Once you have logistic robots, chests, and a roboport network, upgrade to a bot-based mall:

Requester chest method: Each assembler sits next to a requester chest that requests its raw materials. Output goes into a passive provider chest. Logistic bots handle all transport.

Why this is better:

  • No belt spaghetti around the mall section
  • Materials scale horizontally - add more assemblers anywhere in the network
  • Easy to add new items (just drop a new assembler + requester)
  • Blueprint-able as a reusable tile

Upgrade path:

  1. Build a single roboport covering your mall area
  2. Replace chest outputs with passive provider chests
  3. Replace belt feeds with requester chests
  4. Add a buffer chest requesting high-volume items (belts, inserters)
  5. Set up personal logistics slots to auto-fill your inventory

Item priorities for the bot mall (highest volume first):

TierItemsChest filters
HighBelts (all tiers), underground belts, splitters, yellow/fast/stack insertersFill priority - you grab these constantly
MediumAssemblers, furnaces, mining drills, power poles, rails, train stops1-2 stacks each
LowPipes, pumps, tanks, combinators, lamps, walls1 stack each
SpareTurrets, radars, solar panels, accumulators1/2 stack each

The Items I Keep Forgetting

Some items get grabbed so rarely that you'll forget to automate them. Then you need 50 of something and have to hand-craft. Pre-automate these:

  • Pipes (100 stack feels right - you use way more than expected)
  • Underground pipes (pairs, so automate in even numbers)
  • Electric mining drills (you need dozens for new ore patches)
  • Rails, train signals, train stops (if you use trains)
  • Power poles (large poles are easy to forget)
  • Walls and gates (for defense outposts)
  • Efficiency modules (for miners to reduce pollution)

Mall Expansion Checklist

Add these items to your mall as you unlock them:

Game phaseItems to add
Early (pre-green)Yellow belt, underground, splitter, yellow/long inserter, pipe, small pole, stone furnace
Green scienceFast belt, fast inserter, AM1, electric miner, medium pole, boiler, steam engine, radar
Blue scienceSteel furnace, AM2, red belt, red underground, pump, tank, solar panel, accumulator
Purple scienceElectric furnace, productivity module, efficiency module
Yellow scienceBlue belt, blue underground, stack inserter, speed module, roboport, logistic chests
Space AgeAll buildings for each new planet - asteroid collector, thruster, biochamber, foundry, electromagnetic plant

Bottom Line

Building a mall is the single highest-ROI build in Factorio. A 15x15 tile early mall replaces hours of hand-crafting. A bot mall later in the game makes expansion seamless. Build the early version after green science and commit to never hand-crafting building materials again.

Numbers to remember:

  • 15 assemblers cover every essential building in early game
  • Yellow inserters are the highest-volume mall item
  • One dedicated iron belt feeds the early mall
  • Upgrade to requester chests as soon as you have logistic robots

Related: Your First Factory | Main Bus Guide | How to Use Blueprints

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