Securing your shelter in the zombie-infested world of Project Zomboid requires more than just finding a suitable location; it necessitates robust defenses. This guide focuses on a fundamental yet effective method: barricading windows.
How to Barricade Windows in Project Zomboid

To effectively board up your windows, you'll need a specific set of tools and materials: a wooden plank, a hammer, and four nails. Once you've gathered these, simply right-click the target window. Your character will automatically begin securing the plank. Each window supports up to four planks for enhanced protection.
Locating these supplies is key. Hammers and nails are typically found in expected locations – toolboxes, garages, sheds, and closets. Wooden planks are commonly discovered at construction sites, or, in a pinch, can be salvaged by dismantling wooden furniture like shelves and chairs. Administrators can utilize the "/additem" command to spawn these items.

Barricaded windows significantly hinder zombie access. The more planks installed, the greater the resistance to breaches. Removing planks requires a claw hammer or crowbar; simply right-click the boards and select "Remove."
Note that larger furniture items (bookshelves, refrigerators, etc.) are ineffective as window barriers; characters and zombies will pass through them. However, knowing how to move furniture remains a valuable skill for interior arrangement.
While wooden planks offer basic protection, more advanced barricades using metal bars or sheets are achievable with sufficient Metalworking skill.