diff --git a/backend/magic_plan/audit_script.py b/backend/magic_plan/audit_script.py
index 4908684d..2eccdb27 100644
--- a/backend/magic_plan/audit_script.py
+++ b/backend/magic_plan/audit_script.py
@@ -15,6 +15,9 @@ _HEADER_FILL = PatternFill("solid", fgColor="D9D9D9")
 _FLOOR_FILL = PatternFill("solid", fgColor="BDD7EE")
 _BOLD = Font(bold=True)
 _TOTAL_COLS = 25  # A–Y
+_BLANK_SEPARATOR_COLS = {5, 21}
+_MEDIUM_RIGHT = Border(right=Side(style="medium"))
+_SECTION_BOUNDARY_COLS = {4, 11, 15, 20}
 
 
 @dataclass
@@ -82,13 +85,6 @@ def _build_rows(plan: Plan) -> list[AuditRow]:
     return rows
 
 
-_BLANK_SEPARATOR_COLS = {5, 21}
-
-
-_MEDIUM_RIGHT = Border(right=Side(style="medium"))
-_SECTION_BOUNDARY_COLS = {4, 11, 15, 20}
-
-
 def _apply_section_borders(ws: Worksheet, row: int) -> None:
     for col in _SECTION_BOUNDARY_COLS:
         ws.cell(row=row, column=col).border = _MEDIUM_RIGHT
@@ -134,6 +130,7 @@ def _write_headers(ws: Worksheet) -> None:
         for col in range(1, _TOTAL_COLS + 1):
             if col not in _BLANK_SEPARATOR_COLS:
                 ws.cell(row=row, column=col).fill = _HEADER_FILL
+        _apply_section_borders(ws, row)
 
 
 def _write_data_rows(ws: Worksheet, rows: list[AuditRow]) -> None:
@@ -162,6 +159,7 @@ def _write_data_rows(ws: Worksheet, rows: list[AuditRow]) -> None:
             ws.cell(row=xl_row, column=11, value=row.window_opening_type)
             ws.cell(row=xl_row, column=22, value=row.door_location)
             ws.cell(row=xl_row, column=23, value=row.door_width_mm)
+        _apply_section_borders(ws, xl_row)
         xl_row += 1