Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsInput.cs
===================================================================
diff -u -r47554b7d8ad564919abb9e23374dbd8235be9b32 -r9a342802cbb99bf909f9c93cdbd5826245b70905
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsInput.cs	(.../GrassCoverErosionInwardsInput.cs)	(revision 47554b7d8ad564919abb9e23374dbd8235be9b32)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsInput.cs	(.../GrassCoverErosionInwardsInput.cs)	(revision 9a342802cbb99bf909f9c93cdbd5826245b70905)
@@ -182,7 +182,7 @@
                 UseForeshore = false;
                 UseBreakWater = false;
                 BreakWater = GetDefaultBreakWater();
-                DikeHeight = (RoundedDouble) 0.0;
+                DikeHeight = (RoundedDouble) double.NaN;
             }
             else
             {
Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsInputTest.cs
===================================================================
diff -u -r3d6119b921ede5e5eea3de083a17a26f12ffa447 -r9a342802cbb99bf909f9c93cdbd5826245b70905
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsInputTest.cs	(.../GrassCoverErosionInwardsInputTest.cs)	(revision 3d6119b921ede5e5eea3de083a17a26f12ffa447)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsInputTest.cs	(.../GrassCoverErosionInwardsInputTest.cs)	(revision 9a342802cbb99bf909f9c93cdbd5826245b70905)
@@ -65,7 +65,8 @@
             Assert.IsFalse(input.UseForeshore);
             CollectionAssert.IsEmpty(input.ForeshoreGeometry);
             CollectionAssert.IsEmpty(input.DikeGeometry);
-            Assert.AreEqual(new RoundedDouble(2), input.DikeHeight);
+            Assert.AreEqual(2, input.DikeHeight.NumberOfDecimalPlaces);
+            Assert.IsNaN(input.DikeHeight);
             Assert.IsNull(input.HydraulicBoundaryLocation);
             Assert.AreEqual(DikeHeightCalculationType.NoCalculation, input.DikeHeightCalculationType);
 
@@ -188,7 +189,8 @@
             Assert.IsFalse(input.UseForeshore);
             CollectionAssert.IsEmpty(input.ForeshoreGeometry);
             CollectionAssert.IsEmpty(input.DikeGeometry);
-            Assert.AreEqual(new RoundedDouble(0), input.DikeHeight);
+            Assert.AreEqual(2, input.DikeHeight.NumberOfDecimalPlaces);
+            Assert.IsNaN(input.DikeHeight);
             Assert.AreEqual(originalHydraulicBoundaryLocation, input.HydraulicBoundaryLocation);
             Assert.AreEqual(originalCriticalFlowRate, input.CriticalFlowRate);
         }
Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Forms.Test/PropertyClasses/GrassCoverErosionInwardsInputContextPropertiesTest.cs
===================================================================
diff -u -r7918a30f6ddc1ba9067a5eb461a1d7a8cb5bc8a0 -r9a342802cbb99bf909f9c93cdbd5826245b70905
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Forms.Test/PropertyClasses/GrassCoverErosionInwardsInputContextPropertiesTest.cs	(.../GrassCoverErosionInwardsInputContextPropertiesTest.cs)	(revision 7918a30f6ddc1ba9067a5eb461a1d7a8cb5bc8a0)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Forms.Test/PropertyClasses/GrassCoverErosionInwardsInputContextPropertiesTest.cs	(.../GrassCoverErosionInwardsInputContextPropertiesTest.cs)	(revision 9a342802cbb99bf909f9c93cdbd5826245b70905)
@@ -108,7 +108,7 @@
             Assert.IsInstanceOf<UseForeshoreProperties>(properties.Foreshore);
             Assert.AreSame(inputContext, properties.DikeGeometry.Data);
             Assert.AreEqual(2, properties.DikeHeight.NumberOfDecimalPlaces);
-            Assert.AreEqual(0.0, properties.DikeHeight.Value);
+            Assert.IsNaN(properties.DikeHeight);
             Assert.AreEqual(input.CriticalFlowRate.Mean, properties.CriticalFlowRate.Mean);
             Assert.AreEqual(input.CriticalFlowRate.StandardDeviation, properties.CriticalFlowRate.StandardDeviation);
             Assert.IsNull(properties.SelectedHydraulicBoundaryLocation);
@@ -169,9 +169,9 @@
             var properties = new GrassCoverErosionInwardsInputContextProperties
             {
                 Data = new GrassCoverErosionInwardsInputContext(
-                    input, 
-                    new GrassCoverErosionInwardsCalculation(), 
-                    new GrassCoverErosionInwardsFailureMechanism(), 
+                    input,
+                    new GrassCoverErosionInwardsCalculation(),
+                    new GrassCoverErosionInwardsFailureMechanism(),
                     assessmentSectionMock)
             };
 
@@ -236,9 +236,9 @@
         public void SelectedHydraulicBoundaryLocation_WithOrWithoutOutput_HasOutputFalseInputNotifiedAndCalculationNotifiedWhenHadOutput(bool hasOutput)
         {
             SetPropertyAndVerifyNotifcationsAndOutput(
-                hasOutput, 
-                properties => properties.SelectedHydraulicBoundaryLocation = 
-                    new SelectableHydraulicBoundaryLocation(new TestHydraulicBoundaryLocation(), new Point2D(0,0)));
+                hasOutput,
+                properties => properties.SelectedHydraulicBoundaryLocation =
+                              new SelectableHydraulicBoundaryLocation(new TestHydraulicBoundaryLocation(), new Point2D(0, 0)));
         }
 
         [Test]
@@ -247,7 +247,7 @@
         public void UseBreakWater_WithOrWithoutOutput_HasOutputFalseInputNotifiedAndCalculationNotifiedWhenHadOutput(bool hasOutput)
         {
             SetPropertyAndVerifyNotifcationsAndOutput(
-                hasOutput, 
+                hasOutput,
                 properties => properties.BreakWater.UseBreakWater = new Random(21).NextBoolean());
         }
 
@@ -551,7 +551,7 @@
         }
 
         private void SetPropertyAndVerifyNotifcationsAndOutput(
-            bool hasOutput, 
+            bool hasOutput,
             Action<GrassCoverErosionInwardsInputContextProperties> setProperty)
         {
             // Setup