diff --git a/core/src/mindustry/world/Block.java b/core/src/mindustry/world/Block.java
index 37add5f7f5..6c28f04fb6 100644
--- a/core/src/mindustry/world/Block.java
+++ b/core/src/mindustry/world/Block.java
@@ -126,7 +126,7 @@ public class Block extends UnlockableContent{
     public BlockGroup group = BlockGroup.none;
     /** List of block flags. Used for AI indexing. */
     public EnumSet<BlockFlag> flags = EnumSet.of();
-    /** Targeting priority of this block, as seen by enemies.*/
+    /** Targeting priority of this block, as seen by enemies .*/
     public TargetPriority priority = TargetPriority.base;
     /** How much this block affects the unit cap by.
      * The block flags must contain unitModifier in order for this to work. */
@@ -139,9 +139,9 @@ public class Block extends UnlockableContent{
     public boolean consumesTap;
     /** Whether to draw the glow of the liquid for this block, if it has one. */
     public boolean drawLiquidLight = true;
-    /** Whether to periodically sync this block across the network.*/
+    /** Whether to periodically sync this block across the network. */
     public boolean sync;
-    /** Whether this block uses conveyor-type placement mode.*/
+    /** Whether this block uses conveyor-type placement mode. */
     public boolean conveyorPlacement;
     /**
      * The color of this block when displayed on the minimap or map preview.
@@ -173,12 +173,12 @@ public class Block extends UnlockableContent{
     /** Radius of the light emitted by this block. */
     public float lightRadius = 60f;
 
-    /** The sound that this block makes while active. One sound loop. Do not overuse.*/
+    /** The sound that this block makes while active. One sound loop. Do not overuse. */
     public Sound loopSound = Sounds.none;
     /** Active sound base volume. */
     public float loopSoundVolume = 0.5f;
 
-    /** The sound that this block makes while idle. Uses one sound loop for all blocks.*/
+    /** The sound that this block makes while idle. Uses one sound loop for all blocks. */
     public Sound ambientSound = Sounds.none;
     /** Idle sound base volume. */
     public float ambientSoundVolume = 0.05f;
@@ -193,6 +193,8 @@ public class Block extends UnlockableContent{
     public BuildVisibility buildVisibility = BuildVisibility.hidden;
     /** Multiplier for speed of building this block. */
     public float buildCostMultiplier = 1f;
+    /** Build completion at which deconstruction finishes. */
+    public float deconstructThreshold = 0f;
     /** Multiplier for cost of research in tech tree. */
     public float researchCostMultiplier = 1;
     /** Whether this block has instant transfer.*/
diff --git a/core/src/mindustry/world/blocks/ConstructBlock.java b/core/src/mindustry/world/blocks/ConstructBlock.java
index c99f36f36b..17210fefe3 100644
--- a/core/src/mindustry/world/blocks/ConstructBlock.java
+++ b/core/src/mindustry/world/blocks/ConstructBlock.java
@@ -289,7 +289,7 @@ public class ConstructBlock extends Block{
 
             progress = Mathf.clamp(progress - amount);
 
-            if(progress <= 0 || state.rules.infiniteResources){
+            if(progress <= (previous == null ? 0 : previous.deconstructThreshold) || state.rules.infiniteResources){
                 if(lastBuilder == null) lastBuilder = builder;
                 Call.deconstructFinish(tile, this.cblock == null ? previous : this.cblock, lastBuilder);
             }
diff --git a/core/src/mindustry/world/blocks/environment/Boulder.java b/core/src/mindustry/world/blocks/environment/Boulder.java
index 28893d22d4..3d2cd2efa1 100644
--- a/core/src/mindustry/world/blocks/environment/Boulder.java
+++ b/core/src/mindustry/world/blocks/environment/Boulder.java
@@ -12,6 +12,8 @@ public class Boulder extends Block{
         super(name);
         breakable = true;
         alwaysReplace = true;
+        
+        deconstructThreshold = 0.35f;
     }
 
     @Override