diff --git a/dist/pv_tool_logic-1.1.0-py3-none-any.whl b/dist/pv_tool_logic-1.1.0-py3-none-any.whl
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diff --git a/dist/pv_tool_logic-1.1.2-py3-none-any.whl b/dist/pv_tool_logic-1.1.2-py3-none-any.whl
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diff --git a/dist/pv_tool_logic-1.1.2.tar.gz b/dist/pv_tool_logic-1.1.2.tar.gz
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diff --git a/pv_tool_logic/imports/import_options.py b/pv_tool_logic/imports/import_options.py
index 5e539e4..ac819d3 100644
--- a/pv_tool_logic/imports/import_options.py
+++ b/pv_tool_logic/imports/import_options.py
@@ -7,6 +7,16 @@
 if TYPE_CHECKING:
     from pv_tool_logic.imports.import_data import Dbase
 
+def _normaliseer_bool_kolommen(df: pd.DataFrame, kolommen: list[str]) -> pd.DataFrame:
+    """Normaliseert opgegeven kolommen naar booleans.
+
+    Waarden zoals 1, 1.0 en True worden als True geïnterpreteerd.
+    Waarden zoals 0, 0.0, lege cellen en NaN worden False.
+    """
+    for kolom in kolommen:
+        if kolom in df.columns:
+            df[kolom] = df[kolom].fillna(0).astype(bool)
+    return df
 
 def import_dbase(self: Dbase, dbase_dir: Path):
     """Importeert de Dbase-df (template)."""
@@ -17,7 +27,6 @@ def import_dbase(self: Dbase, dbase_dir: Path):
     header_row: int | None = None
     for idx, row in temp_df.iterrows():
         if "ALG__BORING_MONSTERNR_ID" in row.values:
-            # Cast pandas index to int - pandas ensures this is numeric for default RangeIndex
             header_row = int(str(idx))
             break
 
@@ -36,6 +45,16 @@ def import_dbase(self: Dbase, dbase_dir: Path):
                 errors="coerce"
             )
 
+    # Normaliseer True/False kolommen
+    dbase = _normaliseer_bool_kolommen(
+        dbase,
+        [
+            "ALG__CLASSIFICATIE",
+            "ALG__CRS",
+            "ALG__SAMENDRUKKING",
+            "ALG__DSS",
+            "ALG__TRIAXIAAL"])
+
     dbase = dbase.set_index("ALG__BORING_MONSTERNR_ID", drop=False)
     self.dbase_df = dbase
     return self.dbase_df
diff --git a/pyproject.toml b/pyproject.toml
index e49e46f..e5a3100 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ show_missing = true
 
 [tool.poetry]
 name = "pv_tool_logic"
-version = "1.1.0"
+version = "1.1.2"
 description = "Proevenverzamelingtool voor het opstellen van lokale of regionale proevenverzamelingen voor het bepalen van geotechnische parameters."
 authors = [
     "Tjalda Deenekamp <tjalda.deenekamp@arcadis.nl>",