diff --git a/src/main/java/de/epiceric/shopchest/listeners/ChestProtectListener.java b/src/main/java/de/epiceric/shopchest/listeners/ChestProtectListener.java
index efd8fe8..2869b26 100644
--- a/src/main/java/de/epiceric/shopchest/listeners/ChestProtectListener.java
+++ b/src/main/java/de/epiceric/shopchest/listeners/ChestProtectListener.java
@@ -17,6 +17,7 @@ import de.epiceric.shopchest.nms.Hologram;
 import de.epiceric.shopchest.shop.Shop;
 import de.epiceric.shopchest.shop.Shop.ShopType;
 import de.epiceric.shopchest.utils.Callback;
+import de.epiceric.shopchest.utils.ItemUtils;
 import de.epiceric.shopchest.utils.Permissions;
 import de.epiceric.shopchest.utils.ShopUtils;
 import de.epiceric.shopchest.utils.Utils;
@@ -274,7 +275,7 @@ public class ChestProtectListener implements Listener {
 
             if (externalPluginsAllowed || p.hasPermission(Permissions.EXTEND_PROTECTED)) {
                 if (shop.getVendor().getUniqueId().equals(p.getUniqueId()) || p.hasPermission(Permissions.EXTEND_OTHER)) {
-                    if (b.getRelative(BlockFace.UP).getType() == Material.AIR) {
+                    if (ItemUtils.isAir(b.getRelative(BlockFace.UP).getType())) {
                         final Shop newShop = new Shop(shop.getID(), plugin, shop.getVendor(), shop.getProduct(), shop.getLocation(), shop.getBuyPrice(), shop.getSellPrice(), shop.getShopType());
 
                         shopUtils.removeShop(shop, true, new Callback<Void>(plugin) {
diff --git a/src/main/java/de/epiceric/shopchest/listeners/ShopInteractListener.java b/src/main/java/de/epiceric/shopchest/listeners/ShopInteractListener.java
index 2beafb8..1e5dabd 100644
--- a/src/main/java/de/epiceric/shopchest/listeners/ShopInteractListener.java
+++ b/src/main/java/de/epiceric/shopchest/listeners/ShopInteractListener.java
@@ -28,6 +28,7 @@ import de.epiceric.shopchest.shop.ShopProduct;
 import de.epiceric.shopchest.shop.Shop.ShopType;
 import de.epiceric.shopchest.sql.Database;
 import de.epiceric.shopchest.utils.ClickType;
+import de.epiceric.shopchest.utils.ItemUtils;
 import de.epiceric.shopchest.utils.Permissions;
 import de.epiceric.shopchest.utils.ShopUtils;
 import de.epiceric.shopchest.utils.Utils;
@@ -308,7 +309,7 @@ public class ShopInteractListener implements Listener {
 
                                 e.setCancelled(true);
 
-                                if (b.getRelative(BlockFace.UP).getType() == Material.AIR) {
+                                if (ItemUtils.isAir(b.getRelative(BlockFace.UP).getType())) {
                                     ClickType clickType = ClickType.getPlayerClickType(p);
                                     ShopProduct product = clickType.getProduct();
                                     double buyPrice = clickType.getBuyPrice();
diff --git a/src/main/java/de/epiceric/shopchest/shop/Shop.java b/src/main/java/de/epiceric/shopchest/shop/Shop.java
index 0a81b91..2b27412 100644
--- a/src/main/java/de/epiceric/shopchest/shop/Shop.java
+++ b/src/main/java/de/epiceric/shopchest/shop/Shop.java
@@ -117,7 +117,7 @@ public class Shop {
             plugin.debug("Failed to create shop (#" + id + ")");
             plugin.debug(ex);
             return false;
-        } else if ((b.getRelative(BlockFace.UP).getType() != Material.AIR) && Config.showShopItems) {
+        } else if ((!ItemUtils.isAir(b.getRelative(BlockFace.UP).getType())) && Config.showShopItems) {
             NotEnoughSpaceException ex = new NotEnoughSpaceException(String.format("No space above chest in world '%s' at location: %d; %d; %d",
                     b.getWorld().getName(), b.getX(), b.getY(), b.getZ()));
             plugin.getShopUtils().removeShop(this, Config.removeShopOnError);
diff --git a/src/main/java/de/epiceric/shopchest/utils/ItemUtils.java b/src/main/java/de/epiceric/shopchest/utils/ItemUtils.java
index 3a7a0c7..da96b3c 100644
--- a/src/main/java/de/epiceric/shopchest/utils/ItemUtils.java
+++ b/src/main/java/de/epiceric/shopchest/utils/ItemUtils.java
@@ -8,6 +8,7 @@ import org.bukkit.inventory.meta.PotionMeta;
 import org.bukkit.potion.Potion;
 import org.bukkit.potion.PotionType;
 
+import java.util.Arrays;
 import java.util.Map;
 
 public class ItemUtils {
@@ -49,6 +50,10 @@ public class ItemUtils {
         return itemStack.getType().name().endsWith("BANNER_PATTERN");
     }
 
+    public static boolean isAir(Material type) {
+        return Arrays.asList("AIR", "CAVE_AIR", "VOID_AIR").contains(type.name());
+    }
+
     /**
      * Get the {@link ItemStack} from a String
      * @param item Serialized ItemStack e.g. {@code "STONE"} or {@code "STONE:1"}