diff --git a/src/App.tsx b/src/App.tsx
index 8b711dd..89709b7 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -39,6 +39,7 @@ import type {
   OverrideRule,
   Project,
   Roof,
+  RoofType,
   Stair,
   StairType,
   Vec2,
@@ -2273,6 +2274,33 @@ export default function App() {
         ceilingTypes: (p.ceilingTypes ?? []).filter((ct) => ct.id !== id),
       };
     });
+  // ── Dachtypen (Dachaufbauten) — analog Deckentyp ──────────────────────────
+  const patchRoofType = (id: string, patch: Partial<RoofType>) =>
+    setProject((p) => ({
+      ...p,
+      roofTypes: (p.roofTypes ?? []).map((rt) => (rt.id === id ? { ...rt, ...patch } : rt)),
+    }));
+  const addRoofType = () =>
+    setProject((p) => {
+      const componentId = p.components[0]?.id ?? "";
+      const roofType: RoofType = {
+        id: `rt-${Date.now()}`,
+        name: t("default.roofTypeName"),
+        layers: [{ componentId, thickness: 0.2 }],
+      };
+      return { ...p, roofTypes: [...(p.roofTypes ?? []), roofType] };
+    });
+  // Dachtyp löschen — geschützt, solange ihn ein Dach verwendet.
+  const deleteRoofType = (id: string) =>
+    setProject((p) => {
+      const used = (p.roofs ?? []).some((r) => r.roofTypeId === id);
+      if (used) {
+        const name = (p.roofTypes ?? []).find((rt) => rt.id === id)?.name ?? id;
+        notify(t("alert.roofTypeInUse", { name }), "warning");
+        return p;
+      }
+      return { ...p, roofTypes: (p.roofTypes ?? []).filter((rt) => rt.id !== id) };
+    });
   // ── Bauteil-Typen: Tür / Fenster / Treppe (Bibliothek) ────────────────────
   // Anlegen/Patchen/Löschen analog Wand-/Deckentyp — direkt über setProject
   // (kein eigener Slice). Löschen ist geschützt, solange ein Element den Typ
@@ -2954,6 +2982,9 @@ export default function App() {
       onPatchCeilingType: patchCeilingType,
       onAddCeilingType: addCeilingType,
       onDeleteCeilingType: deleteCeilingType,
+      onPatchRoofType: patchRoofType,
+      onAddRoofType: addRoofType,
+      onDeleteRoofType: deleteRoofType,
       onImportLineStyles: importLineStyles,
       onImportHatches: importHatches,
       selection,
@@ -3941,6 +3972,9 @@ export default function App() {
     onPatchCeilingType: patchCeilingType,
     onAddCeilingType: addCeilingType,
     onDeleteCeilingType: deleteCeilingType,
+    onPatchRoofType: patchRoofType,
+    onAddRoofType: addRoofType,
+    onDeleteRoofType: deleteRoofType,
     onAddDoorType: addDoorType,
     onPatchDoorType: patchDoorType,
     onDeleteDoorType: deleteDoorType,
diff --git a/src/i18n/de.ts b/src/i18n/de.ts
index c6ddf8a..8e1c3cf 100644
--- a/src/i18n/de.ts
+++ b/src/i18n/de.ts
@@ -638,6 +638,7 @@ export const de = {
   "default.ceilingTypeSingle": "Decke {thickness} m",
   "default.wallTypeName": "Neuer Wandtyp",
   "default.ceilingTypeName": "Neuer Deckentyp",
+  "default.roofTypeName": "Neuer Dachtyp",
   "default.doorTypeName": "Neuer Türtyp",
   "default.windowTypeName": "Neuer Fenstertyp",
   "default.stairTypeName": "Neuer Treppentyp",
@@ -649,6 +650,7 @@ export const de = {
   "alert.lineStyleInUse": "Linienstil „{name}\" wird von einer Schraffur verwendet und kann nicht gelöscht werden.",
   "alert.wallTypeInUse": "Wandtyp „{name}\" wird von einer Wand verwendet und kann nicht gelöscht werden.",
   "alert.ceilingTypeInUse": "Deckentyp „{name}\" wird von einer Decke verwendet und kann nicht gelöscht werden.",
+  "alert.roofTypeInUse": "Dachtyp „{name}\" wird von einem Dach verwendet und kann nicht gelöscht werden.",
   "alert.doorTypeInUse": "Türtyp „{name}\" wird von einer Tür verwendet und kann nicht gelöscht werden.",
   "alert.windowTypeInUse": "Fenstertyp „{name}\" wird von einem Fenster verwendet und kann nicht gelöscht werden.",
   "alert.stairTypeInUse": "Treppentyp „{name}\" wird von einer Treppe verwendet und kann nicht gelöscht werden.",
@@ -662,6 +664,7 @@ export const de = {
   "resources.tab.lines": "Linien",
   "resources.tab.wallStyles": "Wandstile",
   "resources.tab.ceilingStyles": "Deckenstile",
+  "resources.tab.roofStyles": "Dachtypen",
   "resources.tab.doorStyles": "Türtypen",
   "resources.tab.windowStyles": "Fenstertypen",
   "resources.tab.stairStyles": "Treppentypen",
@@ -703,6 +706,10 @@ export const de = {
   "resources.ceilingStyles.empty": "Noch keine Deckentypen.",
   "resources.wallStyles.placeholder": "Wandtyp",
   "resources.ceilingStyles.placeholder": "Deckentyp",
+  "resources.roofStyles.hint":
+    "Je Dachtyp (Schichtaufbau aussen/Eindeckung → innen/Verkleidung) die Schichtfugen als wählbaren Linienstil. Ohne Zuweisung: Haarlinie 0.02 mm.",
+  "resources.roofStyles.empty": "Noch keine Dachtypen.",
+  "resources.roofStyles.placeholder": "Dachtyp",
 
   // Bauteil-Typen (Tür/Fenster/Treppe) — Formular-Bibliotheken.
   "resources.doorTypes.hint":
@@ -878,6 +885,7 @@ export const de = {
   "resources.delete.hatch": "Schraffur „{name}\" löschen",
   "resources.delete.wallType": "Wandtyp „{name}\" löschen",
   "resources.delete.ceilingType": "Deckentyp „{name}\" löschen",
+  "resources.delete.roofType": "Dachtyp „{name}\" löschen",
 
   // Schraffur-/Linien-Typ (Master-Detail-Editor).
   "resources.field.type": "Typ",
diff --git a/src/i18n/en.ts b/src/i18n/en.ts
index 7f6c69f..fd5eef2 100644
--- a/src/i18n/en.ts
+++ b/src/i18n/en.ts
@@ -633,6 +633,7 @@ export const en: Record<TranslationKey, string> = {
   "default.ceilingTypeSingle": "Ceiling {thickness} m",
   "default.wallTypeName": "New wall type",
   "default.ceilingTypeName": "New ceiling type",
+  "default.roofTypeName": "New roof type",
   "default.doorTypeName": "New door type",
   "default.windowTypeName": "New window type",
   "default.stairTypeName": "New stair type",
@@ -644,6 +645,7 @@ export const en: Record<TranslationKey, string> = {
   "alert.lineStyleInUse": "Line style “{name}” is used by a hatch and cannot be deleted.",
   "alert.wallTypeInUse": "Wall type “{name}” is used by a wall and cannot be deleted.",
   "alert.ceilingTypeInUse": "Ceiling type “{name}” is used by a ceiling and cannot be deleted.",
+  "alert.roofTypeInUse": "Roof type “{name}” is used by a roof and cannot be deleted.",
   "alert.doorTypeInUse": "Door type “{name}” is used by a door and cannot be deleted.",
   "alert.windowTypeInUse": "Window type “{name}” is used by a window and cannot be deleted.",
   "alert.stairTypeInUse": "Stair type “{name}” is used by a stair and cannot be deleted.",
@@ -657,6 +659,7 @@ export const en: Record<TranslationKey, string> = {
   "resources.tab.lines": "Lines",
   "resources.tab.wallStyles": "Wall styles",
   "resources.tab.ceilingStyles": "Ceiling styles",
+  "resources.tab.roofStyles": "Roof types",
   "resources.tab.doorStyles": "Door types",
   "resources.tab.windowStyles": "Window types",
   "resources.tab.stairStyles": "Stair types",
@@ -698,6 +701,10 @@ export const en: Record<TranslationKey, string> = {
   "resources.ceilingStyles.empty": "No ceiling types yet.",
   "resources.wallStyles.placeholder": "Wall type",
   "resources.ceilingStyles.placeholder": "Ceiling type",
+  "resources.roofStyles.hint":
+    "Per roof type (layer build-up outside/covering → inside/lining) the layer joints as a selectable line style. Without assignment: hairline 0.02 mm.",
+  "resources.roofStyles.empty": "No roof types yet.",
+  "resources.roofStyles.placeholder": "Roof type",
 
   // Component types (door/window/stair) — form-based libraries.
   "resources.doorTypes.hint":
@@ -871,6 +878,7 @@ export const en: Record<TranslationKey, string> = {
   "resources.delete.hatch": "Delete hatch “{name}”",
   "resources.delete.wallType": "Delete wall type “{name}”",
   "resources.delete.ceilingType": "Delete ceiling type “{name}”",
+  "resources.delete.roofType": "Delete roof type “{name}”",
 
   // Hatch/line type (master-detail editor).
   "resources.field.type": "Type",
diff --git a/src/panels/ResourcesPanel.tsx b/src/panels/ResourcesPanel.tsx
index a7d2da6..88e3975 100644
--- a/src/panels/ResourcesPanel.tsx
+++ b/src/panels/ResourcesPanel.tsx
@@ -38,6 +38,9 @@ export function ResourcesPanel() {
     onAddWallType: host.onAddWallType,
     onDeleteWallType: host.onDeleteWallType,
     onPatchCeilingType: host.onPatchCeilingType,
+    onPatchRoofType: host.onPatchRoofType,
+    onAddRoofType: host.onAddRoofType,
+    onDeleteRoofType: host.onDeleteRoofType,
     onAddCeilingType: host.onAddCeilingType,
     onDeleteCeilingType: host.onDeleteCeilingType,
     onImportLineStyles: host.onImportLineStyles,
diff --git a/src/panels/host.ts b/src/panels/host.ts
index 4372cd9..fd7423a 100644
--- a/src/panels/host.ts
+++ b/src/panels/host.ts
@@ -17,6 +17,7 @@ import type { DisplayMode } from "./types";
 import type {
   AttributeSource,
   CeilingType,
+  RoofType,
   Component,
   ContextObject,
   DrawingLevel,
@@ -132,6 +133,10 @@ export interface PanelHostValue {
   onPatchCeilingType: (id: string, patch: Partial<CeilingType>) => void;
   onAddCeilingType: () => void;
   onDeleteCeilingType: (id: string) => void;
+  /** Dachtypen (Dachaufbauten): immutable Änderung/Anlage/Löschung. */
+  onPatchRoofType: (id: string, patch: Partial<RoofType>) => void;
+  onAddRoofType: () => void;
+  onDeleteRoofType: (id: string) => void;
   /** Import fertiger (id-loser) Linienstile/Schraffuren (.lin/.pat). */
   onImportLineStyles: (styles: Omit<LineStyle, "id">[]) => void;
   onImportHatches: (hatches: Omit<HatchStyle, "id">[]) => void;
diff --git a/src/ui/ResourceManager.tsx b/src/ui/ResourceManager.tsx
index 27a06e6..312463c 100644
--- a/src/ui/ResourceManager.tsx
+++ b/src/ui/ResourceManager.tsx
@@ -20,6 +20,7 @@ import { useEffect, useMemo, useRef, useState } from "react";
 import type { PointerEvent as ReactPointerEvent } from "react";
 import type {
   CeilingType,
+  RoofType,
   Component,
   ComponentMaterial,
   DoorType,
@@ -1893,6 +1894,39 @@ function CeilingStylesTab({
   );
 }
 
+/**
+ * Tab „Dachtypen" — das geneigte Gegenstück zu {@link CeilingStylesTab}: gleicher
+ * {@link LayeredStylesTab}-Rumpf (Schichtaufbau aussen/Eindeckung → innen/
+ * Verkleidung), Ressource `roofTypes`. Vorschau in Decken-Orientierung
+ * (gestapelt) — für die Schichtreihenfolge/-dicken ausreichend.
+ */
+function RoofStylesTab({
+  project,
+  onPatchRoofType,
+  onAddRoofType,
+  onDeleteRoofType,
+}: {
+  project: Project;
+  onPatchRoofType: (id: string, patch: Partial<RoofType>) => void;
+  onAddRoofType: () => void;
+  onDeleteRoofType: (id: string) => void;
+}) {
+  return (
+    <LayeredStylesTab
+      project={project}
+      types={project.roofTypes ?? []}
+      orientation="ceiling"
+      hintKey="resources.roofStyles.hint"
+      emptyKey="resources.roofStyles.empty"
+      placeholderKey="resources.roofStyles.placeholder"
+      deleteKeyPrefix="resources.delete.roofType"
+      onPatch={onPatchRoofType}
+      onAdd={onAddRoofType}
+      onDelete={onDeleteRoofType}
+    />
+  );
+}
+
 /**
  * Datei-Import-Schaltfläche (verstecktes <input type=file>). Liest die gewählte
  * Datei als Text und reicht ihn nach oben. Für .lin/.pat-Import.
@@ -2957,6 +2991,7 @@ export type TabId =
   | "lines"
   | "wallStyles"
   | "ceilingStyles"
+  | "roofStyles"
   | "doorStyles"
   | "windowStyles"
   | "stairStyles"
@@ -2969,6 +3004,7 @@ const TABS: { id: TabId; labelKey: string }[] = [
   { id: "lines", labelKey: "resources.tab.lines" },
   { id: "wallStyles", labelKey: "resources.tab.wallStyles" },
   { id: "ceilingStyles", labelKey: "resources.tab.ceilingStyles" },
+  { id: "roofStyles", labelKey: "resources.tab.roofStyles" },
   { id: "doorStyles", labelKey: "resources.tab.doorStyles" },
   { id: "windowStyles", labelKey: "resources.tab.windowStyles" },
   { id: "stairStyles", labelKey: "resources.tab.stairStyles" },
@@ -2995,6 +3031,10 @@ export interface ResourceManagerHandlers {
   onPatchCeilingType: (id: string, patch: Partial<CeilingType>) => void;
   onAddCeilingType: () => void;
   onDeleteCeilingType: (id: string) => void;
+  /** Dachtypen (Dachaufbauten): immutable Änderung/Anlage/Löschung. */
+  onPatchRoofType: (id: string, patch: Partial<RoofType>) => void;
+  onAddRoofType: () => void;
+  onDeleteRoofType: (id: string) => void;
   /** Import: fügt fertige (id-lose) Linienstile/Schraffuren hinzu (.lin/.pat). */
   onImportLineStyles: (styles: Omit<LineStyle, "id">[]) => void;
   onImportHatches: (hatches: Omit<HatchStyle, "id">[]) => void;
@@ -3219,6 +3259,14 @@ export function ResourceManager({
               onDeleteCeilingType={handlers.onDeleteCeilingType}
             />
           )}
+          {tab === "roofStyles" && (
+            <RoofStylesTab
+              project={project}
+              onPatchRoofType={handlers.onPatchRoofType}
+              onAddRoofType={handlers.onAddRoofType}
+              onDeleteRoofType={handlers.onDeleteRoofType}
+            />
+          )}
           {tab === "doorStyles" && (
             <DoorStylesTab
               project={project}