diff --git a/src/main/java/de/diddiz/LogBlock/BlockChange.java b/src/main/java/de/diddiz/LogBlock/BlockChange.java
index caa282e..30af6f7 100644
--- a/src/main/java/de/diddiz/LogBlock/BlockChange.java
+++ b/src/main/java/de/diddiz/LogBlock/BlockChange.java
@@ -74,14 +74,14 @@ public class BlockChange implements LookupCacheElement {
             msg.append(actor.getName()).append(" ");
         }
         if (signtext != null) {
-            final String action = type.getMaterial() == Material.AIR ? "destroyed " : "created ";
+            final String action = BukkitUtils.isEmpty(type.getMaterial()) ? "destroyed " : "created ";
             if (!signtext.contains("\0")) {
                 msg.append(action).append(signtext);
             } else {
-                msg.append(action).append((type.getMaterial() != Material.AIR ? type : replaced).getMaterial().name()).append(" [").append(signtext.replace("\0", "] [")).append("]");
+                msg.append(action).append((!BukkitUtils.isEmpty(type.getMaterial()) ? type : replaced).getMaterial().name()).append(" [").append(signtext.replace("\0", "] [")).append("]");
             }
         } else if (type.equals(replaced)) {
-            if (type.getMaterial() == Material.AIR) {
+            if (BukkitUtils.isEmpty(type.getMaterial())) {
                 msg.append("did an unspecified action");
             } else if (ca != null) {
                 if (ca.itemStack == null) {
@@ -109,9 +109,9 @@ public class BlockChange implements LookupCacheElement {
             } else if (type.getMaterial() == Material.TRIPWIRE) {
                 msg.append("ran into ").append(type.getMaterial().name());
             }
-        } else if (type.getMaterial() == Material.AIR) {
+        } else if (BukkitUtils.isEmpty(type.getMaterial())) {
             msg.append("destroyed ").append(replaced.getMaterial().name());
-        } else if (replaced.getMaterial() == Material.AIR) {
+        } else if (BukkitUtils.isEmpty(replaced.getMaterial())) {
             msg.append("created ").append(type.getMaterial().name());
         } else {
             msg.append("replaced ").append(replaced.getMaterial().name()).append(" with ").append(type.getMaterial().name());
diff --git a/src/main/java/de/diddiz/LogBlock/Consumer.java b/src/main/java/de/diddiz/LogBlock/Consumer.java
index 683e9cd..20bdb12 100644
--- a/src/main/java/de/diddiz/LogBlock/Consumer.java
+++ b/src/main/java/de/diddiz/LogBlock/Consumer.java
@@ -67,7 +67,7 @@ public class Consumer extends TimerTask {
     }
 
     /**
-     * Logs a block break. The type afterwards is assumed to be 0 (air).
+     * Logs a block break. The type afterwards is assumed to be air.
      *
      * @param actor
      *            Actor responsible for breaking the block
@@ -79,7 +79,7 @@ public class Consumer extends TimerTask {
     }
 
     /**
-     * Logs a block break. The block type afterwards is assumed to be 0 (air).
+     * Logs a block break. The block type afterwards is assumed to be air.
      *
      * @param actor
      *            Actor responsible for the block break
@@ -95,7 +95,7 @@ public class Consumer extends TimerTask {
     }
 
     /**
-     * Logs a block place. The block type before is assumed to be 0 (air).
+     * Logs a block place. The block type before is assumed to be air.
      *
      * @param actor
      *            Actor responsible for placing the block
@@ -107,7 +107,7 @@ public class Consumer extends TimerTask {
     }
 
     /**
-     * Logs a block place. The block type before is assumed to be 0 (air).
+     * Logs a block place. The block type before is assumed to be air.
      *
      * @param actor
      *            Actor responsible for placing the block
@@ -215,7 +215,7 @@ public class Consumer extends TimerTask {
     }
 
     /**
-     * Logs a container block break. The block type before is assumed to be o (air). All content is assumed to be taken.
+     * Logs a container block break. The block type before is assumed to be air. All content is assumed to be taken.
      *
      * @param actor
      *            The actor breaking the container
@@ -230,7 +230,7 @@ public class Consumer extends TimerTask {
     }
 
     /**
-     * Logs a container block break. The block type before is assumed to be o (air). All content is assumed to be taken.
+     * Logs a container block break. The block type before is assumed to be air. All content is assumed to be taken.
      *
      * @param actor
      *            The actor responsible for breaking the container
diff --git a/src/main/java/de/diddiz/LogBlock/Kill.java b/src/main/java/de/diddiz/LogBlock/Kill.java
index 11ea97f..819d32b 100755
--- a/src/main/java/de/diddiz/LogBlock/Kill.java
+++ b/src/main/java/de/diddiz/LogBlock/Kill.java
@@ -1,6 +1,8 @@
 package de.diddiz.LogBlock;
 
 import de.diddiz.LogBlock.config.Config;
+import de.diddiz.util.BukkitUtils;
+
 import org.bukkit.Location;
 import org.bukkit.Material;
 
@@ -57,7 +59,7 @@ public class Kill implements LookupCacheElement {
     }
 
     public String prettyItemName(Material t) {
-        if (t == null || t == Material.AIR) {
+        if (t == null || BukkitUtils.isEmpty(t)) {
             return "fist";
         }
         return t.toString().replace('_', ' ').toLowerCase();
diff --git a/src/main/java/de/diddiz/LogBlock/WorldEditor.java b/src/main/java/de/diddiz/LogBlock/WorldEditor.java
index 5cd9c03..813493a 100644
--- a/src/main/java/de/diddiz/LogBlock/WorldEditor.java
+++ b/src/main/java/de/diddiz/LogBlock/WorldEditor.java
@@ -20,6 +20,8 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.inventory.InventoryHolder;
 import org.bukkit.inventory.ItemStack;
 
+import de.diddiz.util.BukkitUtils;
+
 import java.io.File;
 import java.io.PrintWriter;
 import java.text.SimpleDateFormat;
@@ -167,7 +169,7 @@ public class WorldEditor implements Runnable {
                 return PerformResult.BLACKLISTED;
             }
             final Block block = loc.getBlock();
-            if (replacedBlock.getMaterial() == Material.AIR && block.getType() == Material.AIR) {
+            if (BukkitUtils.isEmpty(replacedBlock.getMaterial()) && BukkitUtils.isEmpty(block.getType())) {
                 return PerformResult.NO_ACTION;
             }
             final BlockState state = block.getState();
@@ -175,7 +177,7 @@ public class WorldEditor implements Runnable {
                 world.loadChunk(block.getChunk());
             }
             if (setBlock.equals(replacedBlock)) {
-                if (setBlock.getMaterial() == Material.AIR) {
+                if (BukkitUtils.isEmpty(setBlock.getMaterial())) {
                     block.setType(Material.AIR);
                 } else if (ca != null) {
                     if (state instanceof InventoryHolder) {
diff --git a/src/main/java/de/diddiz/LogBlock/events/BlockChangePreLogEvent.java b/src/main/java/de/diddiz/LogBlock/events/BlockChangePreLogEvent.java
index ade7807..9d7bf62 100644
--- a/src/main/java/de/diddiz/LogBlock/events/BlockChangePreLogEvent.java
+++ b/src/main/java/de/diddiz/LogBlock/events/BlockChangePreLogEvent.java
@@ -2,6 +2,8 @@ package de.diddiz.LogBlock.events;
 
 import de.diddiz.LogBlock.Actor;
 import de.diddiz.LogBlock.ChestAccess;
+import de.diddiz.util.BukkitUtils;
+
 import org.apache.commons.lang.Validate;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
@@ -85,10 +87,10 @@ public class BlockChangePreLogEvent extends PreLogEvent {
 
     private boolean isValidSign() {
 
-        if ((typeAfter.getMaterial() == Material.SIGN || typeAfter.getMaterial() == Material.WALL_SIGN) && typeBefore.getMaterial() == Material.AIR) {
+        if ((typeAfter.getMaterial() == Material.SIGN || typeAfter.getMaterial() == Material.WALL_SIGN) && BukkitUtils.isEmpty(typeBefore.getMaterial())) {
             return true;
         }
-        if ((typeBefore.getMaterial() == Material.SIGN || typeBefore.getMaterial() == Material.WALL_SIGN) && typeAfter.getMaterial() == Material.AIR) {
+        if ((typeBefore.getMaterial() == Material.SIGN || typeBefore.getMaterial() == Material.WALL_SIGN) && BukkitUtils.isEmpty(typeAfter.getMaterial())) {
             return true;
         }
         if ((typeAfter.getMaterial() == Material.SIGN || typeAfter.getMaterial() == Material.WALL_SIGN) && typeBefore.equals(typeAfter)) {
diff --git a/src/main/java/de/diddiz/LogBlock/listeners/BlockPlaceLogging.java b/src/main/java/de/diddiz/LogBlock/listeners/BlockPlaceLogging.java
index 1324319..f48aff8 100644
--- a/src/main/java/de/diddiz/LogBlock/listeners/BlockPlaceLogging.java
+++ b/src/main/java/de/diddiz/LogBlock/listeners/BlockPlaceLogging.java
@@ -37,7 +37,7 @@ public class BlockPlaceLogging extends LoggingListener {
             if (type.hasGravity()) {
 
                 // Catch placed blocks overwriting something
-                if (before.getType() != Material.AIR) {
+                if (!BukkitUtils.isEmpty(before.getType())) {
                     consumer.queueBlockBreak(actor, before);
                 }
 
@@ -46,7 +46,7 @@ public class BlockPlaceLogging extends LoggingListener {
                 int y = loc.getBlockY();
                 int z = loc.getBlockZ();
                 // Blocks only fall if they have a chance to start a velocity
-                if (event.getBlock().getRelative(BlockFace.DOWN).getType() == Material.AIR) {
+                if (BukkitUtils.isEmpty(event.getBlock().getRelative(BlockFace.DOWN).getType())) {
                     while (y > 0 && BukkitUtils.canFall(loc.getWorld(), x, (y - 1), z)) {
                         y--;
                     }
@@ -56,7 +56,7 @@ public class BlockPlaceLogging extends LoggingListener {
                     Location finalLoc = new Location(loc.getWorld(), x, y, z);
                     // Run this check to avoid false positives
                     if (!BukkitUtils.getFallingEntityKillers().contains(finalLoc.getBlock().getType())) {
-                        if (finalLoc.getBlock().getType() == Material.AIR || finalLoc.equals(event.getBlock().getLocation())) {
+                        if (BukkitUtils.isEmpty(finalLoc.getBlock().getType()) || finalLoc.equals(event.getBlock().getLocation())) {
                             consumer.queueBlockPlace(actor, finalLoc, event.getBlock().getBlockData());
                         } else {
                             consumer.queueBlockReplace(actor, finalLoc, finalLoc.getBlock().getBlockData(), event.getBlock().getBlockData());
@@ -75,7 +75,7 @@ public class BlockPlaceLogging extends LoggingListener {
             LogBlock.getInstance().getServer().getScheduler().scheduleSyncDelayedTask(LogBlock.getInstance(), new Runnable() {
                 @Override
                 public void run() {
-                    if (before.getType() == Material.AIR) {
+                    if (BukkitUtils.isEmpty(before.getType())) {
                         consumer.queueBlockPlace(actor, after);
                     } else {
                         consumer.queueBlockReplace(actor, before, after);
diff --git a/src/main/java/de/diddiz/LogBlock/listeners/FluidFlowLogging.java b/src/main/java/de/diddiz/LogBlock/listeners/FluidFlowLogging.java
index 750b73d..c1ebe5e 100644
--- a/src/main/java/de/diddiz/LogBlock/listeners/FluidFlowLogging.java
+++ b/src/main/java/de/diddiz/LogBlock/listeners/FluidFlowLogging.java
@@ -32,7 +32,7 @@ public class FluidFlowLogging extends LoggingListener {
             
             final Block to = event.getToBlock();
             final Material typeTo = to.getType();
-            final boolean canFlow = typeTo == Material.AIR || BukkitUtils.getNonFluidProofBlocks().contains(typeTo);
+            final boolean canFlow = BukkitUtils.isEmpty(typeTo) || BukkitUtils.getNonFluidProofBlocks().contains(typeTo);
             if (typeFrom == Material.LAVA) {
                 Levelled levelledFrom = (Levelled)blockDataFrom;
                 if (canFlow && wcfg.isLogging(Logging.LAVAFLOW)) {
@@ -41,7 +41,7 @@ public class FluidFlowLogging extends LoggingListener {
                     } else {
                         Levelled newBlock = (Levelled) blockDataFrom.clone();
                         newBlock.setLevel(levelledFrom.getLevel() + 1);
-                        if (typeTo == Material.AIR) {
+                        if (BukkitUtils.isEmpty(typeTo)) {
                             consumer.queueBlockPlace(new Actor("LavaFlow"), to.getLocation(), newBlock);
                         } else {
                             consumer.queueBlockReplace(new Actor("LavaFlow"), to.getState(), newBlock);
@@ -58,7 +58,7 @@ public class FluidFlowLogging extends LoggingListener {
                 Levelled levelledFrom = (Levelled)blockDataFrom;
                 Levelled newBlock = (Levelled) blockDataFrom.clone();
                 newBlock.setLevel(levelledFrom.getLevel() + 1);
-                if (typeTo == Material.AIR) {
+                if (BukkitUtils.isEmpty(typeTo)) {
                     consumer.queueBlockPlace(new Actor("WaterFlow"), to.getLocation(), newBlock);
                 } else if (BukkitUtils.getNonFluidProofBlocks().contains(typeTo)) {
                     consumer.queueBlockReplace(new Actor("WaterFlow"), to.getState(), newBlock);
@@ -70,7 +70,7 @@ public class FluidFlowLogging extends LoggingListener {
                         consumer.queueBlockReplace(new Actor("WaterFlow"), to.getState(), Material.STONE.createBlockData());
                     }
                 }
-                if (typeTo == Material.AIR || BukkitUtils.getNonFluidProofBlocks().contains(typeTo)) {
+                if (BukkitUtils.isEmpty(typeTo) || BukkitUtils.getNonFluidProofBlocks().contains(typeTo)) {
                     for (final BlockFace face : new BlockFace[]{BlockFace.DOWN, BlockFace.NORTH, BlockFace.WEST, BlockFace.EAST, BlockFace.SOUTH}) {
                         final Block lower = to.getRelative(face);
                         if (lower.getType() == Material.LAVA) {
diff --git a/src/main/java/de/diddiz/util/BukkitUtils.java b/src/main/java/de/diddiz/util/BukkitUtils.java
index 6a43c9a..516b83d 100644
--- a/src/main/java/de/diddiz/util/BukkitUtils.java
+++ b/src/main/java/de/diddiz/util/BukkitUtils.java
@@ -487,4 +487,8 @@ public class BukkitUtils {
     public static boolean isDoublePlant(Material m) {
         return doublePlants.contains(m);
     }
+
+    public static boolean isEmpty(Material m) {
+        return m == Material.AIR || m == Material.CAVE_AIR || m == Material.VOID_AIR;
+    }
 }
diff --git a/src/main/java/de/diddiz/util/LoggingUtil.java b/src/main/java/de/diddiz/util/LoggingUtil.java
index 6a58d92..10e03c1 100644
--- a/src/main/java/de/diddiz/util/LoggingUtil.java
+++ b/src/main/java/de/diddiz/util/LoggingUtil.java
@@ -50,7 +50,7 @@ public class LoggingUtil {
                 // Run this check to avoid false positives
                 if (!BukkitUtils.getFallingEntityKillers().contains(finalLoc.getBlock().getType())) {
                     finalLoc.add(0, up, 0); // Add this here after checking for block breakers
-                    if (finalLoc.getBlock().getType() == Material.AIR) {
+                    if (BukkitUtils.isEmpty(finalLoc.getBlock().getType())) {
                         consumer.queueBlockPlace(actor, finalLoc, checkBlock.getBlockData());
                     } else {
                         consumer.queueBlockReplace(actor, finalLoc, finalLoc.getBlock().getBlockData(), checkBlock.getBlockData());
diff --git a/src/main/java/de/diddiz/util/Utils.java b/src/main/java/de/diddiz/util/Utils.java
index 849d56f..c52a676 100644
--- a/src/main/java/de/diddiz/util/Utils.java
+++ b/src/main/java/de/diddiz/util/Utils.java
@@ -16,7 +16,6 @@ import java.util.regex.Pattern;
 import java.util.zip.GZIPInputStream;
 import java.util.zip.GZIPOutputStream;
 
-import org.bukkit.Material;
 import org.bukkit.configuration.InvalidConfigurationException;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.inventory.ItemStack;
@@ -239,7 +238,7 @@ public class Utils {
     }
 
     public static byte[] saveItemStack(ItemStack stack) {
-        if (stack == null || stack.getType() == Material.AIR) {
+        if (stack == null || BukkitUtils.isEmpty(stack.getType())) {
             return null;
         }
         try {
diff --git a/src/main/java/de/diddiz/worldedit/WorldEditLoggingHook.java b/src/main/java/de/diddiz/worldedit/WorldEditLoggingHook.java
index d8d0169..64b2a8f 100644
--- a/src/main/java/de/diddiz/worldedit/WorldEditLoggingHook.java
+++ b/src/main/java/de/diddiz/worldedit/WorldEditLoggingHook.java
@@ -15,6 +15,8 @@ import com.sk89q.worldedit.world.block.BlockStateHolder;
 import de.diddiz.LogBlock.LogBlock;
 import de.diddiz.LogBlock.Logging;
 import de.diddiz.LogBlock.config.Config;
+import de.diddiz.util.BukkitUtils;
+
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.Material;
@@ -109,7 +111,7 @@ public class WorldEditLoggingHook {
                             plugin.getConsumer().queueBlockBreak(lbActor, location, origin.getBlockData());
                         }
                         BlockData newBlock = BukkitAdapter.adapt(block);
-                        if (newBlock != null && newBlock.getMaterial() != Material.AIR) {
+                        if (newBlock != null && !BukkitUtils.isEmpty(newBlock.getMaterial())) {
                             plugin.getConsumer().queueBlockPlace(lbActor, location, newBlock);
                         }
                     }