Sledgehammer

The sledgehammer is a heavy melee weapon. It can be used to bash down doors. The weapon cannot be used at all if the player is over-encumbered. Due to its weight it will very quickly exhaust the player but on a positive note it appears to kill zombies in one hit.

You can use a sledgehammer to break down walls. You use it like you do a barricade or whatever, with it on your mouse pointer and click repeatedly on the wall.