Base defense in 30 Floors Up starts with a layered safe room, not a single locked door. Use Apartment 3004 on Floor 30 as the operating base: close the curtains, lock the doors and windows, move furniture behind the main entrance, and keep food, water, medical items, tools, and weapons where they can be reached quickly. Reinforce damaged entry points with the correct materials, keep noise down when infected are nearby, and treat Day 3's water and power changes as the first major preparation deadline.
The aim is to buy time and preserve options. A lock slows an entry, furniture adds another obstruction, and a repaired door or vent restores a damaged barrier. None of these makes the apartment permanently safe. If the door is breached, you need a route around the infected, enough health and stamina to move, and supplies for recovery.
Apartment 3004 Defense Priorities
The following records describe what each defensive layer does and when it matters. Use them in order: conceal the room, secure the openings, add a physical delay, then repair what has taken damage.
| Defense or tool | What it does | What you need | Best use |
|---|---|---|---|
| Curtains | Reduce visible activity from outside | A usable window | Close them during setup and before sleep |
| Door or window lock | Slows or prevents normal entry | The opening must close | Secure every opening before night |
| Furniture brace | Adds a physical obstruction | Movable desk, couch, chair, or table | Brace the main entrance when you can accept the moving noise |
| Door repair | Restores a damaged door or defense structure | Plank, Box of Screws, Hammer or Screwdriver | Repair after a breach attempt when the area is quiet enough |
| Plank | Boards a door, vent, or temporary barrier | A found plank | Spend it on an opening that protects a useful route |
| Box of Screws | Fastens repairs or reinforcement | A found box; two uses are recorded | Save it for a repair that keeps a key barrier usable |
| Radio decoy | Draws infected toward its sound | Radio and AA Batteries | Redirect attention away from your movement or base |
| Low-noise movement | Reduces attention drawn by actions | No item; crouch and move carefully | Use near the apartment or during a retreat |
Locks are the minimum layer. The opening has to close for the lock interaction to work, and the opening can still become a problem if infected keep attacking it. Furniture is a delay rather than a replacement for the lock: push a desk, couch, chair, or table into position, but remember that moving it creates noise and may obstruct your own escape.
Brace the Apartment 3004 entrance with furniture
This moment supports the furniture-bracing step by showing the desk positioned at the entrance to block people or infected from passing through the door.
Materials and Defensive Interactions
Base defense depends on ordinary scavenged items rather than a separate construction menu. Planks and Boxes of Screws are the important repair materials. A plank can board a door or vent and can contribute to a temporary barrier. A Box of Screws is recorded as having two uses, so avoid spending the last use on a low-value obstruction when the main door or a necessary route needs repair.
The Hammer and Screwdriver are not interchangeable in every situation, but both are listed as tools for repairs. The Hammer also works as a melee weapon, with a recorded base damage of 23. Hammering is loud—about 55 noise in the available reference—so do not stand at a damaged entrance making repeated repairs while infected are already concentrated nearby. If you have a choice, create distance first, use a quieter opportunity, or prepare an alternate route before committing to the repair.
The exact durability of doors, furniture braces, and planks is not established in the available game references. Do not plan around a precise number of hits or assume one furniture type lasts longer than another. Watch the current state of the opening and repair prompt in the game instead. The practical rule is to use multiple layers and to leave yourself a way out.
Noise Around the Base
Noise changes whether a defense buys you time or advertises your position. The recorded movement levels put crouching at about 6, walking at about 14, and sprinting at about 32. Moving furniture is also noisy, with the desk-bracing reference recording about 38. Repairs with a Hammer are louder still at about 55. These figures are useful for comparing actions, not promises of an exact detection radius.
Close doors to reduce sound travel, crouch when you are repositioning near the base, and avoid sprinting through the apartment unless the breach has already forced an emergency move. Turn routine preparation into a quiet sequence: secure the openings, organize supplies, then stop unnecessary movement. A television, generator, or other loud activity should not be treated as harmless background while you are trying to hide.
A radio can reverse the noise problem by becoming a decoy. With AA Batteries installed, choose a low or high volume based on the job. The recorded levels are about 22 at low volume and about 90 at high volume; the radio continues attracting infected while it plays. Low volume is the more restrained option for a nearby diversion. High volume is a stronger but riskier distraction when you need to pull attention toward another room or corridor. Turn the idea into a route: start the decoy, move while the infected investigate, and do not assume the radio has made the apartment safe.
Day 3 Preparation and Sleep
Day 3 is the first hard base-defense deadline because water and power stop being dependable. Before that change, collect and store water in containers, and keep food, medical supplies, candles, flashlights, and AA Batteries in Apartment 3004 or another location you can reach without a dangerous detour. A bathtub can serve as a practical place to group water containers, but the important decision is having water secured before the cutoff rather than relying on a later refill.
Power loss makes lighting and battery planning part of defense. Candles and flashlights help with night movement and repairs; AA Batteries also support the radio decoy. A generator can provide power, but its continuous noise can attract attention, so it is a tradeoff rather than an automatic upgrade. Use it when the benefit of visibility or equipment outweighs the exposure, and avoid leaving it running simply because it is available.
Before sleeping, complete a short security check:
- Close the curtains and confirm that doors and windows are shut.
- Lock every opening that can be secured.
- Check that the main entrance is not blocked in a way that prevents your own movement.
- Put food, water, medicine, and a weapon within practical reach.
- Confirm that a bed or other usable sleeping place remains available.
- Stop loud actions and listen for infected or other activity outside.
The sleep objective and the recorded player sequence both make “lock up for the night” and finding a sleeping place part of the base routine. A bed that has been moved or an unusable room can turn a successful defense into a failed recovery attempt, so do not sacrifice every clear floor space to barricades.
When the Door Gives Way
If infected remove the apartment door, switch from maintenance to incident response. Do not keep interacting with a broken barrier as though it were still a lockable entrance. Move through the safest available route, use a weapon only when fighting is safer than movement, and keep medical supplies available for the damage you may take. The recorded gameplay shows the player fighting infected and trying to escape after the apartment door is taken down; that is a reminder that the base is a fallback point, not a permanent bunker.
Escape after the Apartment 3004 door is breached
This moment supports the breach-recovery guidance by showing the player respond to the apartment door being taken down by fighting infected and trying to escape.
The best response depends on what is already in the room:
- The hallway is open: leave the immediate doorway, create distance, and circle back after the infected lose pressure.
- The infected are clustered at the entrance: use a radio decoy in another room or corridor only if you can deploy it without trapping yourself, then move along the alternate route.
- The door is damaged but still usable: repair it with the required plank, screws, and tool when the area is quiet enough; do not spend time hammering while targets are already at the threshold.
- Health or stamina is low: prioritize retreat, treatment, and a clear path over another attempt to brace the same entrance.
These are decision rules, not guarantees. The available references do not establish exact breach timing, damage thresholds, or how long a particular brace holds. Keep one route clear, avoid storing every essential item behind the same door, and be ready to abandon the room temporarily.
Defense Limits and Long-Term Planning
Base defense supports progression; it does not replace it. Apartment 3004 is the starting base on Floor 30 and a useful place to sleep, sort supplies, recover, and prepare another trip. The elevator stopping and the need to use stairs or corridors increase exposure during scavenging, so balance repair work against the supplies you still need to collect.
Survivors can also change the pressure at the entrance. Daniel and other survivors may ask to enter. Opening the door can provide information or help, but it also creates a timing risk when infected are close. Check the outside situation before opening, and do not unlock a carefully prepared entrance without a reason to accept the added exposure.
Finally, a strong apartment setup is not the same as completing the run. The timeline includes a larger migration event around Day 15, and the wider progression route still points toward keys, vertical movement, and rooftop extraction objectives. Use the base to conserve health and resources between trips, then leave it when the route forward requires it. The most reliable defense is layered protection plus a planned exit, not an untested claim that one lock, one plank, or one piece of furniture can hold forever.
First-time 30 Floors Up base defense questions
Is Apartment 3004 the main base for a run?
Yes. Apartment 3004 on Floor 30 is the starting safe room used for storage, sleep, recovery, and organizing supplies. It is a strong fallback location, but it is not confirmed to be permanently secure against a sustained breach.
Should I lock the door or move furniture first?
Do both when possible: close and lock the opening, then place a desk, couch, chair, or table behind it. Moving furniture creates noise and can block your own route, so leave enough space to retreat.
What do I need to repair a damaged door?
The recorded repair requirements are a Plank, a Box of Screws, and either a Hammer or Screwdriver. Hammer repairs are loud, so repair only when you have enough distance or a quiet opportunity.
How should I use a radio near the base?
Use a battery-powered radio as a decoy to pull infected toward another room or corridor. Low volume is recorded at about 22 noise and high volume at about 90; it keeps attracting infected while it plays, so move along a route rather than assuming the distraction removes the threat.
What should I prepare before Day 3?
Secure water before the water cutoff, then keep food, medicine, candles, a flashlight, and AA Batteries accessible in the base. Day 3 also brings power loss, so plan for darker repairs and weigh a generator's noisy continuous power against its exposure risk.