# 2F Corridor: Cover Rat Holes research

> Fills in all the rat holes. Now there's a lower chance of meeting rats in this corridor.

Canonical: https://lostark.wiki/database/stronghold-research/2f-corridor-cover-rat-holes-109211

Fills in all the rat holes.  
Now there's a lower chance of meeting rats in this corridor.

## Facts

- **Category**: Stronghold and Slot Extension
- **Time Taken**: 0d 04:00:00
- **Required Action Energy**: 1,382
- **Research Cost**: 126 Gold
- **Stronghold XP gained**: 2,765
- **Research Requirements**: Lab Lv. 5; Stronghold Lv. 35 or above; [Manor Lv. 5](https://lostark.wiki/database/stronghold-research/manor-lv-5-101005); [Stronghold Unlocked: Manor 2F](https://lostark.wiki/database/stronghold-research/stronghold-unlocked-manor-2f-100311)

## Related

- [Required by research](https://lostark.wiki/database/stronghold-research/2f-corridor-cover-rat-holes-109211#relationships) (1)
- [Research Requirements](https://lostark.wiki/database/stronghold-research/2f-corridor-cover-rat-holes-109211?relation=research_requires#relationships) (2)
- [Required Materials](https://lostark.wiki/database/stronghold-research/2f-corridor-cover-rat-holes-109211?relation=research_materials#relationships) (2)

### Required by research

1–1 of 1

| Name | Details |
| --- | --- |
| [2F Corridor: Safety Inspection](https://lostark.wiki/database/stronghold-research/2f-corridor-safety-inspection-109212) |  |

## Related

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