diff --git a/src/micropolisj/engine/Animate.java b/src/micropolisj/engine/Animate.java
index df8ce91..f9f3c99 100644
--- a/src/micropolisj/engine/Animate.java
+++ b/src/micropolisj/engine/Animate.java
@@ -38,8 +38,8 @@ class Animate
 		static int [] AniTabC = { IND1,    0, IND2, IND4,    0,    0, IND6, IND8 };
 		static int [] AniTabD = { IND1,    0, IND3, IND5,    0,    0, IND7, IND9 };
 
-		static final int ASCBIT = (CONDBIT | BURNBIT);
-		static final int REGBIT = (CONDBIT | BURNBIT);
+		static final int ASCBIT = (CONDBIT);
+		static final int REGBIT = (CONDBIT);
 	}
 
 }
diff --git a/src/micropolisj/engine/MapGenerator.java b/src/micropolisj/engine/MapGenerator.java
index 6fbe1c4..65645ab 100644
--- a/src/micropolisj/engine/MapGenerator.java
+++ b/src/micropolisj/engine/MapGenerator.java
@@ -479,7 +479,7 @@ public class MapGenerator
 
 			if ((map[mapY][mapX] & LOMASK) == DIRT)
 			{
-				map[mapY][mapX] = WOODS | BULLBIT | BURNBIT;
+				map[mapY][mapX] = WOODS | BULLBIT;
 			}
 		}
 	}
@@ -532,7 +532,7 @@ public class MapGenerator
 								temp -= 8;
 							}
 						}
-						map[mapY][mapX] = (char)(temp | BULLBIT | BURNBIT);
+						map[mapY][mapX] = (char)(temp | BULLBIT);
 					}
 					else
 					{
diff --git a/src/micropolisj/engine/MapScanner.java b/src/micropolisj/engine/MapScanner.java
index f2f5e6c..aac6819 100644
--- a/src/micropolisj/engine/MapScanner.java
+++ b/src/micropolisj/engine/MapScanner.java
@@ -509,7 +509,7 @@ class MapScanner
 		{
 			for (int x = xpos-1; x <= xpos+1; x++)
 			{
-				city.setTile(x, y, (char)(base | BURNBIT | CONDBIT | (x == xpos && y == ypos ? BULLBIT : 0)));
+				city.setTile(x, y, (char)(base | CONDBIT | (x == xpos && y == ypos ? BULLBIT : 0)));
 				base++;
 			}
 		}
@@ -631,13 +631,13 @@ class MapScanner
 			{
 				if ((city.map[ypos-1][xpos+1] & LOMASK) == RADAR) {
 					city.setTile(xpos+1,ypos-1, (char)
-					(RADAR_ANIM + CONDBIT + BURNBIT)
+					(RADAR_ANIM + CONDBIT)
 					);
 				}
 			}
 			else
 			{
-				city.setTile(xpos+1,ypos-1,(char)(RADAR + CONDBIT + BURNBIT));
+				city.setTile(xpos+1,ypos-1,(char)(RADAR + CONDBIT));
 			}
 
 			if (powerOn) {
@@ -759,7 +759,7 @@ class MapScanner
 					{  //not rubble, radiactive, on fire or flooded
 
 						city.setTile(xx,yy,(char)
-						(zoneBase+CONDBIT+BURNBIT)
+						(zoneBase+CONDBIT)
 						);
 					}
 				}
@@ -1080,7 +1080,7 @@ class MapScanner
 			assert houseNumber >= 0 && houseNumber < 12;
 
 			assert city.testBounds(xx, yy);
-			city.setTile(xx, yy, (char)((HOUSE + houseNumber) | BULLBIT | BURNBIT | CONDBIT));
+			city.setTile(xx, yy, (char)((HOUSE + houseNumber) | BULLBIT | CONDBIT));
 		}
 	}
 
@@ -1207,7 +1207,7 @@ class MapScanner
 		{
 			// downgrade from full-size zone to 8 little houses
 
-			city.setTile(xpos, ypos, (char)(FREEZ | BULLBIT | BURNBIT | CONDBIT));
+			city.setTile(xpos, ypos, (char)(FREEZ | BULLBIT | CONDBIT));
 			for (int x = xpos-1; x <= xpos+1; x++)
 			{
 				for (int y = ypos-1; y <= ypos+1; y++)
@@ -1218,7 +1218,7 @@ class MapScanner
 						{
 							// pick a random small house
 							int houseNumber = value * 3 + PRNG.nextInt(3);
-							city.setTile(x, y, (char) ((HOUSE + houseNumber) | BULLBIT | BURNBIT | CONDBIT));
+							city.setTile(x, y, (char) ((HOUSE + houseNumber) | BULLBIT | CONDBIT));
 						}
 					}
 				}
@@ -1243,7 +1243,7 @@ class MapScanner
 						int loc = city.map[y][x] & LOMASK;
 						if (loc >= LHTHR && loc <= HHTHR)
 						{ //little house
-							city.setTile(x, y, (char)((Brdr[z] + FREEZ - 4) | BULLBIT | BURNBIT | CONDBIT));
+							city.setTile(x, y, (char)((Brdr[z] + FREEZ - 4) | BULLBIT | CONDBIT));
 							return;
 						}
 					}
@@ -1342,7 +1342,7 @@ class MapScanner
 			int tile = city.getTile(xpos+dx[z], ypos+dy[z]) & LOMASK;
 			if (tile >= COALBASE && tile < COALBASE + 4*4) {
 				city.setTile(xpos + dx[z], ypos + dy[z],
-				(char) (SmTb[z] | CONDBIT | PWRBIT | BURNBIT)
+				(char) (SmTb[z] | CONDBIT | PWRBIT)
 				);
 			}
 		}
@@ -1374,7 +1374,7 @@ class MapScanner
 			for (int x = 0; x < 4; x++, zoneBase++)
 			{
 				city.setTile(xpos - 1 + x, ypos - 1 + y,
-					(char) (zoneBase | BURNBIT | CONDBIT | (x == 1 && y == 1 ? (PWRBIT) : 0)));
+					(char) (zoneBase | CONDBIT | (x == 1 && y == 1 ? (PWRBIT) : 0)));
 			}
 		}
 	}
diff --git a/src/micropolisj/engine/Micropolis.java b/src/micropolisj/engine/Micropolis.java
index a90194c..e3eba46 100644
--- a/src/micropolisj/engine/Micropolis.java
+++ b/src/micropolisj/engine/Micropolis.java
@@ -1965,7 +1965,7 @@ public class Micropolis
 			for (int y = 0; y < DEFAULT_HEIGHT; y++)
 			{
 				int z = dis.readShort();
-				z &= ~(1024 | 2048);         // clear ZONEBIT,ANIMBIT on import
+				z &= ~(1024 | 2048 | 8192); // clear ZONEBIT,ANIMBIT,BURNBIT on import
 				map[y][x] = (char) z;
 			}
 		}
@@ -1979,6 +1979,9 @@ public class Micropolis
 			for (int y = 0; y < DEFAULT_HEIGHT; y++)
 			{
 				int z = map[y][x];
+				if (isCombustible(z)) {
+					z |= 8192;   //synthesize BURNBIT on export
+				}
 				if (isAnimated(z)) {
 					z |= 2048;   //synthesize ANIMBIT on export
 				}
diff --git a/src/micropolisj/engine/RoadLikeTool.java b/src/micropolisj/engine/RoadLikeTool.java
index 2c33ee5..18b04c2 100644
--- a/src/micropolisj/engine/RoadLikeTool.java
+++ b/src/micropolisj/engine/RoadLikeTool.java
@@ -201,19 +201,19 @@ class RoadLikeTool extends ToolStroke
 			return false;
 
 		case LHPOWER: // rail on power
-			eff.setTile(0, 0, (char) (RAILVPOWERH | CONDBIT | BURNBIT | BULLBIT));
+			eff.setTile(0, 0, (char) (RAILVPOWERH | CONDBIT | BULLBIT));
 			break;
 
 		case LVPOWER: // rail on power
-			eff.setTile(0, 0, (char) (RAILHPOWERV | CONDBIT | BURNBIT | BULLBIT));
+			eff.setTile(0, 0, (char) (RAILHPOWERV | CONDBIT | BULLBIT));
 			break;
 
 		case TileConstants.ROADS:	// rail on road (case 1)
-			eff.setTile(0, 0, (char) (VRAILROAD | BURNBIT | BULLBIT));
+			eff.setTile(0, 0, (char) (VRAILROAD | BULLBIT));
 			break;
 
 		case ROADS2:	// rail on road (case 2)
-			eff.setTile(0, 0, (char) (HRAILROAD | BURNBIT | BULLBIT));
+			eff.setTile(0, 0, (char) (HRAILROAD | BULLBIT));
 			break;
 
 		default:
@@ -228,7 +228,7 @@ class RoadLikeTool extends ToolStroke
 			}
 
 		  	//rail on dirt
-			eff.setTile(0, 0, (char) (LHRAIL | BULLBIT | BURNBIT));
+			eff.setTile(0, 0, (char) (LHRAIL | BULLBIT));
 			break;
 		}
 
@@ -304,19 +304,19 @@ class RoadLikeTool extends ToolStroke
 			return false;
 
 		case LHPOWER: //road on power
-			eff.setTile(0, 0, (char) (VROADPOWER | CONDBIT | BURNBIT | BULLBIT));
+			eff.setTile(0, 0, (char) (VROADPOWER | CONDBIT | BULLBIT));
 			break;
 
 		case LVPOWER: //road on power #2
-			eff.setTile(0, 0, (char) (HROADPOWER | CONDBIT | BURNBIT | BULLBIT));
+			eff.setTile(0, 0, (char) (HROADPOWER | CONDBIT | BULLBIT));
 			break;
 
 		case LHRAIL: //road on rail
-			eff.setTile(0, 0, (char) (HRAILROAD | BURNBIT | BULLBIT));
+			eff.setTile(0, 0, (char) (HRAILROAD | BULLBIT));
 			break;
 
 		case LVRAIL: //road on rail #2
-			eff.setTile(0, 0, (char) (VRAILROAD | BURNBIT | BULLBIT));
+			eff.setTile(0, 0, (char) (VRAILROAD | BULLBIT));
 			break;
 
 		default:
@@ -332,7 +332,7 @@ class RoadLikeTool extends ToolStroke
 
 			// road on dirt;
 			// just build a plain road, fixZone will fix it.
-			eff.setTile(0, 0, (char) (TileConstants.ROADS | BULLBIT | BURNBIT));
+			eff.setTile(0, 0, (char) (TileConstants.ROADS | BULLBIT));
 			break;
 		}
 	
@@ -422,19 +422,19 @@ class RoadLikeTool extends ToolStroke
 			return false;
 
 		case TileConstants.ROADS: // wire on E/W road
-			eff.setTile(0, 0, (char) (HROADPOWER | CONDBIT | BURNBIT | BULLBIT));
+			eff.setTile(0, 0, (char) (HROADPOWER | CONDBIT | BULLBIT));
 			break;
 
 		case ROADS2: // wire on N/S road
-			eff.setTile(0, 0, (char) (VROADPOWER | CONDBIT | BURNBIT | BULLBIT));
+			eff.setTile(0, 0, (char) (VROADPOWER | CONDBIT | BULLBIT));
 			break;
 
 		case LHRAIL:	// wire on E/W railroad tracks
-			eff.setTile(0, 0, (char) (RAILHPOWERV | CONDBIT | BURNBIT | BULLBIT));
+			eff.setTile(0, 0, (char) (RAILHPOWERV | CONDBIT | BULLBIT));
 			break;
 
 		case LVRAIL:	// wire on N/S railroad tracks
-			eff.setTile(0, 0, (char) (RAILVPOWERH | CONDBIT | BURNBIT | BULLBIT));
+			eff.setTile(0, 0, (char) (RAILVPOWERH | CONDBIT | BULLBIT));
 			break;
 
 		default:
@@ -449,7 +449,7 @@ class RoadLikeTool extends ToolStroke
 			}
 
 			//wire on dirt
-			eff.setTile(0, 0, (char) (LHPOWER | CONDBIT | BULLBIT | BURNBIT));
+			eff.setTile(0, 0, (char) (LHPOWER | CONDBIT | BULLBIT));
 			break;
 		}
 
diff --git a/src/micropolisj/engine/TileConstants.java b/src/micropolisj/engine/TileConstants.java
index fd301c0..2327d70 100644
--- a/src/micropolisj/engine/TileConstants.java
+++ b/src/micropolisj/engine/TileConstants.java
@@ -210,7 +210,7 @@ public class TileConstants
 	//
 	public static final char PWRBIT = 32768;  // bit 15 ... currently powered
 	public static final char CONDBIT = 16384; // bit 14 ... can conduct power
-	public static final char BURNBIT = 8192;  // bit 13 ... is combustible
+	// bit 13 ... unused
 	public static final char BULLBIT = 4096;  // bit 12 ... is bulldozable
 	// bit 11 ... unused
 	// bit 10 ... unused
@@ -300,7 +300,8 @@ public class TileConstants
 
 	public static boolean isCombustible(int tile)
 	{
-		return (tile & BURNBIT) != 0;
+		TileSpec spec = Tiles.get(tile & LOMASK);
+		return spec != null && spec.canBurn;
 	}
 
 	public static boolean isFire(int tile)
diff --git a/src/micropolisj/engine/TileSpec.java b/src/micropolisj/engine/TileSpec.java
index d8dc464..c19cda6 100644
--- a/src/micropolisj/engine/TileSpec.java
+++ b/src/micropolisj/engine/TileSpec.java
@@ -6,6 +6,7 @@ public class TileSpec
 {
 	int tileNumber;
 	TileSpec animNext;
+	boolean canBurn;
 	boolean zone;
 
 	Map<String,String> attributes;
@@ -69,6 +70,7 @@ public class TileSpec
 			}
 		}
 
+		this.canBurn = getBooleanAttribute("noburn");
 		this.zone = getBooleanAttribute("zone");
 	}
 
diff --git a/src/micropolisj/engine/ToolStroke.java b/src/micropolisj/engine/ToolStroke.java
index 3ad453e..c02f4a4 100644
--- a/src/micropolisj/engine/ToolStroke.java
+++ b/src/micropolisj/engine/ToolStroke.java
@@ -182,7 +182,7 @@ public class ToolStroke
 			for (int columnNum = 0; columnNum < width; columnNum++)
 			{
 				eff.setTile(columnNum, rowNum, (char) (
-					tileBase | BURNBIT | CONDBIT
+					tileBase | CONDBIT
 					));
 				tileBase++;
 			}
@@ -240,9 +240,9 @@ public class ToolStroke
 		int z = inPreview ? 0 : city.PRNG.nextInt(5);
 		int tile;
 		if (z < 4) {
-			tile = (WOODS2 + z) | BURNBIT | BULLBIT;
+			tile = (WOODS2 + z) | BULLBIT;
 		} else {
-			tile = FOUNTAIN | BURNBIT | BULLBIT;
+			tile = FOUNTAIN | BULLBIT;
 		}
 
 		eff.spend(cost);
@@ -340,7 +340,7 @@ public class ToolStroke
 				}
 			}
 
-			eff.setTile(0, 0, (RoadTable[adjTile] | BULLBIT | BURNBIT));
+			eff.setTile(0, 0, (RoadTable[adjTile] | BULLBIT));
 		} //endif on a road tile
 
 		else if (tile >= LHRAIL && tile <= LVRAIL10)
@@ -400,7 +400,7 @@ public class ToolStroke
 				}
 			}
 
-			eff.setTile(0, 0, (RailTable[adjTile] | BULLBIT | BURNBIT));
+			eff.setTile(0, 0, (RailTable[adjTile] | BULLBIT));
 		} //end if on a rail tile
 
 		else if (tile >= LHPOWER && tile <= LVPOWER10)
@@ -460,7 +460,7 @@ public class ToolStroke
 				}
 			}
 
-			eff.setTile(0, 0, (WireTable[adjTile] | BULLBIT | BURNBIT | CONDBIT));
+			eff.setTile(0, 0, (WireTable[adjTile] | BULLBIT | CONDBIT));
 		} //end if on a rail tile
 
 		return;