diff --git a/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/extension/base/.ratings b/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/extension/base/.ratings
index 8e8f81b7146f6308e0916dc488de67d8c51a00e7..a2f0162199fcc5cc07e32957b1d8b970ead7845a 100644
--- a/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/extension/base/.ratings
+++ b/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/extension/base/.ratings
@@ -8,7 +8,7 @@ ModelEditorBindingBase.java 4c5ac569c0b6e7678fc8191096b26dfd09fdcb98 GREEN
 ModelElementHandlerBase.java 384727748f125c9d43f19d9c0eba4ba1be5a7a26 GREEN
 MultiEObjectActionBase.java 9e237d8ea640c4194e4877af4a9cfce88698e543 GREEN
 NamedCommentedModelElementHandlerBase.java 681b98b50b362f01abb7a36f108f4f11b9e51829 GREEN
-PropertySectionBase.java 3601ee8bd77be45ff770a5ee1c7536f100bee6b2 GREEN
+PropertySectionBase.java c545ad187b8fcff8fc9e592a923b7c0b1522133b YELLOW
 TutorialStepUIAtomicBase.java cea2a158158b476de2108d2309afcf47f217b6d9 GREEN
 TutorialStepUIAtomicWithWhitelistBase.java a9788ae514f62d27169c737ef59fb583234b5d43 GREEN
 TutorialStepUICompositeBase.java 8225210eacb5b88de47d78280c5819f572f00ffa GREEN
diff --git a/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/extension/base/PropertySectionBase.java b/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/extension/base/PropertySectionBase.java
index 3601ee8bd77be45ff770a5ee1c7536f100bee6b2..c545ad187b8fcff8fc9e592a923b7c0b1522133b 100644
--- a/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/extension/base/PropertySectionBase.java
+++ b/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/extension/base/PropertySectionBase.java
@@ -21,17 +21,20 @@ import static org.eclipse.core.databinding.conversion.NumberToStringConverter.fr
 import static org.eclipse.core.databinding.conversion.StringToNumberConverter.toBigDecimal;
 import static org.eclipse.core.databinding.conversion.StringToNumberConverter.toDouble;
 import static org.eclipse.core.databinding.conversion.StringToNumberConverter.toInteger;
+import static org.eclipse.core.databinding.validation.ValidationStatus.cancel;
+import static org.eclipse.core.databinding.validation.ValidationStatus.ok;
 import static org.fortiss.tooling.kernel.ui.util.DataBindingUtils.DECORATION_KEY;
 import static org.fortiss.tooling.kernel.ui.util.DataBindingUtils.performComplexTextBinding;
 import static org.fortiss.tooling.kernel.ui.util.WidgetsFactory.createTextWithUndo;
 
 import java.math.BigDecimal;
+import java.text.ParsePosition;
 
 import org.conqat.ide.commons.ui.databinding.validate.NumberPositiveValidator;
-import org.conqat.ide.commons.ui.databinding.validate.TextToDoubleValidator;
 import org.conqat.ide.commons.ui.databinding.validate.TextToIntegerValidator;
 import org.eclipse.core.databinding.observable.value.IObservableValue;
 import org.eclipse.core.databinding.validation.IValidator;
+import org.eclipse.core.runtime.IStatus;
 import org.eclipse.emf.databinding.EMFDataBindingContext;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.gef.EditPart;
@@ -66,6 +69,35 @@ import com.ibm.icu.text.NumberFormat;
  */
 public abstract class PropertySectionBase extends AbstractPropertySection {
 
+	/** Validates if a given input is a valid {@link Number}. */
+	private static class TextToDoubleValidator implements IValidator {
+
+		/** Singleton instance. */
+		public static final TextToDoubleValidator INSTANCE = new TextToDoubleValidator();
+
+		/** The number format used in the current locale. */
+		private final NumberFormat format = NumberFormat.getNumberInstance();
+
+		/** {@inheritDoc} */
+		@Override
+		public IStatus validate(Object value) {
+			assert (value != null);
+
+			ParsePosition p = new ParsePosition(0);
+			String input = value.toString();
+			format.parse(input, p);
+			int errorIndex = p.getErrorIndex();
+			// In case the input as a valid prefix, the error index will not indicate a problem.
+			// Therefore, check if the entire input was parsed.
+			if(errorIndex == -1 && p.getIndex() < input.length()) {
+				errorIndex = p.getIndex();
+			}
+
+			return errorIndex == -1 ? ok() : cancel(
+					"Double number format validation failed at position " + errorIndex + ".");
+		}
+	}
+
 	/** Label width. */
 	public static final int PROPERTIES_LABEL_WIDTH = 150;