Index: Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Data/HeightStructuresInput.cs
===================================================================
diff -u -re390f6a1553c21ed32ebf3426f35cc0924a9900c -r589d56ba6dc9217ff4b68ea15df5a513576a25d1
--- Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Data/HeightStructuresInput.cs	(.../HeightStructuresInput.cs)	(revision e390f6a1553c21ed32ebf3426f35cc0924a9900c)
+++ Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Data/HeightStructuresInput.cs	(.../HeightStructuresInput.cs)	(revision 589d56ba6dc9217ff4b68ea15df5a513576a25d1)
@@ -56,10 +56,9 @@
         /// </summary>
         public HeightStructuresInput()
         {
-            failureProbabilityStructureWithErosion = 1.0;
-
             levelCrestStructure = new NormalDistribution(2)
             {
+                Mean = (RoundedDouble) double.NaN,
                 StandardDeviation = (RoundedDouble) 0.05
             };
 
@@ -79,7 +78,7 @@
 
             storageStructureArea = new VariationCoefficientLogNormalDistribution(2)
             {
-                Mean = (RoundedDouble) 1.0,
+                Mean = (RoundedDouble) double.NaN,
                 CoefficientOfVariation = (RoundedDouble) 0.1
             };
 
@@ -91,16 +90,19 @@
 
             criticalOvertoppingDischarge = new VariationCoefficientLogNormalDistribution(2)
             {
-                Mean = (RoundedDouble) 1.0,
+                Mean = (RoundedDouble) double.NaN,
                 CoefficientOfVariation = (RoundedDouble) 0.15
             };
 
+            failureProbabilityStructureWithErosion = double.NaN;
+
             widthFlowApertures = new VariationCoefficientNormalDistribution(2)
             {
+                Mean = (RoundedDouble) double.NaN,
                 CoefficientOfVariation = (RoundedDouble) 0.05
             };
 
-            deviationWaveDirection = new RoundedDouble(2);
+            deviationWaveDirection = new RoundedDouble(2, double.NaN);
 
             stormDuration = new VariationCoefficientLogNormalDistribution(2)
             {