diff --git a/apps/xi.web/src/pages/(app)/_layout/classrooms/$classroomId/index.tsx b/apps/xi.web/src/pages/(app)/_layout/classrooms/$classroomId/index.tsx
index bcd40c2a..158d1fc7 100644
--- a/apps/xi.web/src/pages/(app)/_layout/classrooms/$classroomId/index.tsx
+++ b/apps/xi.web/src/pages/(app)/_layout/classrooms/$classroomId/index.tsx
@@ -1,5 +1,6 @@
 /* eslint-disable @typescript-eslint/ban-ts-comment */
 import { createFileRoute } from '@tanstack/react-router';
+import { BoardRouteWarmup } from 'modules.board/warmup';
 import { lazy } from 'react';
 import { z } from 'zod';
 
@@ -38,6 +39,7 @@ export const Route = createFileRoute('/(app)/_layout/classrooms/$classroomId/')(
 function ClassroomPageComponent() {
   return (
     <>
+      <BoardRouteWarmup />
       <ClassroomPage />
     </>
   );
diff --git a/apps/xi.web/src/pages/(app)/_layout/materials/index.tsx b/apps/xi.web/src/pages/(app)/_layout/materials/index.tsx
index 40966332..1095e934 100644
--- a/apps/xi.web/src/pages/(app)/_layout/materials/index.tsx
+++ b/apps/xi.web/src/pages/(app)/_layout/materials/index.tsx
@@ -1,5 +1,6 @@
 /* eslint-disable @typescript-eslint/ban-ts-comment */
 import { createFileRoute } from '@tanstack/react-router';
+import { BoardRouteWarmup } from 'modules.board/warmup';
 import { MaterialsPage } from 'pages.materials';
 import { z } from 'zod';
 
@@ -8,7 +9,12 @@ const searchSchema = z.object({
 });
 
 const Materials = () => {
-  return <MaterialsPage />;
+  return (
+    <>
+      <BoardRouteWarmup />
+      <MaterialsPage />
+    </>
+  );
 };
 
 // @ts-ignore
diff --git a/packages/modules.board/package.json b/packages/modules.board/package.json
index 3c42248a..2963898b 100644
--- a/packages/modules.board/package.json
+++ b/packages/modules.board/package.json
@@ -3,7 +3,8 @@
   "version": "0.0.0",
   "type": "module",
   "exports": {
-    ".": "./index.ts"
+    ".": "./index.ts",
+    "./warmup": "./src/warmup/index.ts"
   },
   "license": "MIT",
   "scripts": {
diff --git a/packages/modules.board/src/warmup/BoardRouteWarmup.tsx b/packages/modules.board/src/warmup/BoardRouteWarmup.tsx
new file mode 100644
index 00000000..f1fa3b04
--- /dev/null
+++ b/packages/modules.board/src/warmup/BoardRouteWarmup.tsx
@@ -0,0 +1,32 @@
+import { env } from 'common.env';
+import { useEffect, useRef } from 'react';
+import { prefetchBoardModule } from './prefetchBoardModule';
+import {
+  ensureResourceHint,
+  scheduleIdleTask,
+  shouldSkipBackgroundPrefetch,
+  toHttpOrigin,
+} from './utils';
+
+/** Фоновый прогрев доски на страницах, откуда чаще всего открывают доску (кабинет, материалы). */
+export const BoardRouteWarmup = () => {
+  const startedRef = useRef(false);
+
+  useEffect(() => {
+    if (startedRef.current || shouldSkipBackgroundPrefetch()) return;
+
+    ensureResourceHint('preconnect', toHttpOrigin(env.VITE_SERVER_URL_HOCUS), true);
+    ensureResourceHint('dns-prefetch', env.VITE_SERVER_URL_BACKEND);
+
+    const cancel = scheduleIdleTask(() => {
+      startedRef.current = true;
+      void prefetchBoardModule().catch(() => {
+        startedRef.current = false;
+      });
+    }, 3000);
+
+    return cancel;
+  }, []);
+
+  return null;
+};
diff --git a/packages/modules.board/src/warmup/index.ts b/packages/modules.board/src/warmup/index.ts
new file mode 100644
index 00000000..7c841ab6
--- /dev/null
+++ b/packages/modules.board/src/warmup/index.ts
@@ -0,0 +1,3 @@
+export { BoardRouteWarmup } from './BoardRouteWarmup';
+export { prefetchBoardModule } from './prefetchBoardModule';
+export { prefetchBoardStorageItem } from './prefetchBoardStorageItem';
diff --git a/packages/modules.board/src/warmup/prefetchBoardModule.ts b/packages/modules.board/src/warmup/prefetchBoardModule.ts
new file mode 100644
index 00000000..52615393
--- /dev/null
+++ b/packages/modules.board/src/warmup/prefetchBoardModule.ts
@@ -0,0 +1,13 @@
+let boardModulePrefetch: Promise<unknown> | null = null;
+
+/** Подгружает DrawBoard и зависимости — тот же граф, что при открытии доски. */
+export function prefetchBoardModule(): Promise<unknown> {
+  if (!boardModulePrefetch) {
+    boardModulePrefetch = import('../ui/DrawBoard').catch((error) => {
+      boardModulePrefetch = null;
+      throw error;
+    });
+  }
+
+  return boardModulePrefetch;
+}
diff --git a/packages/modules.board/src/warmup/prefetchBoardStorageItem.ts b/packages/modules.board/src/warmup/prefetchBoardStorageItem.ts
new file mode 100644
index 00000000..3a294c1a
--- /dev/null
+++ b/packages/modules.board/src/warmup/prefetchBoardStorageItem.ts
@@ -0,0 +1,43 @@
+import type { QueryClient } from '@tanstack/react-query';
+import { classroomMaterialsApiConfig, ClassroomMaterialsQueryKey } from 'common.api';
+import { getAxiosInstance } from 'common.config';
+
+async function fetchClassroomStorageItem(
+  classroomId: string,
+  boardId: string,
+  isTutor: boolean,
+): Promise<unknown> {
+  const queryKey = isTutor
+    ? ClassroomMaterialsQueryKey.ClassroomStorageItem
+    : ClassroomMaterialsQueryKey.ClassroomStorageItemStudent;
+  const apiConfig = classroomMaterialsApiConfig[queryKey];
+  const axiosInstance = await getAxiosInstance();
+
+  const response = await axiosInstance({
+    method: apiConfig.method,
+    url: apiConfig.getUrl(classroomId, boardId),
+    headers: {
+      'Content-Type': 'application/json',
+    },
+  });
+
+  return response.data;
+}
+
+export function prefetchBoardStorageItem(
+  queryClient: QueryClient,
+  classroomId: string,
+  boardId: string,
+  isTutor: boolean,
+): Promise<void> {
+  const queryKey = isTutor
+    ? [ClassroomMaterialsQueryKey.ClassroomStorageItem, classroomId, boardId]
+    : [ClassroomMaterialsQueryKey.ClassroomStorageItemStudent, classroomId, boardId];
+
+  return queryClient
+    .prefetchQuery({
+      queryKey,
+      queryFn: () => fetchClassroomStorageItem(classroomId, boardId, isTutor),
+    })
+    .then(() => undefined);
+}
diff --git a/packages/modules.board/src/warmup/utils.ts b/packages/modules.board/src/warmup/utils.ts
new file mode 100644
index 00000000..b495dd6e
--- /dev/null
+++ b/packages/modules.board/src/warmup/utils.ts
@@ -0,0 +1,42 @@
+type NetworkInformationLike = {
+  saveData?: boolean;
+  effectiveType?: string;
+};
+
+export function shouldSkipBackgroundPrefetch(): boolean {
+  const conn = (navigator as Navigator & { connection?: NetworkInformationLike }).connection;
+  if (!conn) return false;
+  if (conn.saveData) return true;
+  return conn.effectiveType === '2g' || conn.effectiveType === 'slow-2g';
+}
+
+export function scheduleIdleTask(task: () => void, timeoutMs = 3000): () => void {
+  if (typeof requestIdleCallback !== 'undefined') {
+    const id = requestIdleCallback(() => task(), { timeout: timeoutMs });
+    return () => cancelIdleCallback(id);
+  }
+
+  const id = window.setTimeout(task, 1000);
+  return () => clearTimeout(id);
+}
+
+export function toHttpOrigin(url: string): string {
+  return url.replace(/^wss:\/\//, 'https://').replace(/^ws:\/\//, 'http://');
+}
+
+export function ensureResourceHint(
+  rel: 'preconnect' | 'dns-prefetch',
+  href: string,
+  crossOrigin = false,
+): void {
+  const selector = `link[rel="${rel}"][href="${href}"]`;
+  if (document.head.querySelector(selector)) return;
+
+  const link = document.createElement('link');
+  link.rel = rel;
+  link.href = href;
+  if (crossOrigin) {
+    link.crossOrigin = 'anonymous';
+  }
+  document.head.appendChild(link);
+}
diff --git a/packages/modules.calls/package.json b/packages/modules.calls/package.json
index fe06330e..cbc764f1 100644
--- a/packages/modules.calls/package.json
+++ b/packages/modules.calls/package.json
@@ -21,6 +21,7 @@
     "common.env": "workspace:*",
     "common.services": "workspace:*",
     "common.utils": "workspace:*",
+    "modules.board": "workspace:*",
     "@xipkg/calls": "^0.1.4",
     "@xipkg/calls-chat": "^0.1.4",
     "@xipkg/calls-compactview": "^0.1.4",
diff --git a/packages/modules.calls/src/CallsShell.tsx b/packages/modules.calls/src/CallsShell.tsx
index 738c5f9b..e78dd953 100644
--- a/packages/modules.calls/src/CallsShell.tsx
+++ b/packages/modules.calls/src/CallsShell.tsx
@@ -15,6 +15,7 @@ import { callsSessionPort } from './callsSession';
 import { createCallsRuntimeConfig } from './createCallsRuntimeConfig';
 import { useCallsDeps } from './useCallsDeps';
 import { ProductCallAnalyticsTracker } from './productAnalytics/ProductCallAnalyticsTracker';
+import { BoardCallStorageWarmup } from './boardWarmup/BoardCallStorageWarmup';
 
 import '@xipkg/calls-ui/video-security.css';
 import '@xipkg/calls-ui/driver.css';
@@ -62,6 +63,7 @@ const CallsShellProviders = ({ children }: CallsShellPropsT) => {
         <LiveKitProvider>
           <ModeSyncProvider>
             <ProductCallAnalyticsTracker />
+            <BoardCallStorageWarmup />
             <CallsShellInit />
             {children}
           </ModeSyncProvider>
diff --git a/packages/modules.calls/src/boardWarmup/BoardCallStorageWarmup.tsx b/packages/modules.calls/src/boardWarmup/BoardCallStorageWarmup.tsx
new file mode 100644
index 00000000..f43f775c
--- /dev/null
+++ b/packages/modules.calls/src/boardWarmup/BoardCallStorageWarmup.tsx
@@ -0,0 +1,25 @@
+import { useQueryClient } from '@tanstack/react-query';
+import { useCallStore } from '@xipkg/calls-store';
+import { useCurrentUser } from 'common.services';
+import { prefetchBoardStorageItem } from 'modules.board/warmup';
+import { useEffect } from 'react';
+
+/** Prefetch storage-item при смене activeBoardId в звонке (до редиректа на доску). */
+export const BoardCallStorageWarmup = () => {
+  const queryClient = useQueryClient();
+  const { data: user } = useCurrentUser();
+  const activeBoardId = useCallStore((state) => state.activeBoardId);
+  const activeClassroom = useCallStore((state) => state.activeClassroom);
+
+  const isTutor = user?.default_layout === 'tutor';
+
+  useEffect(() => {
+    if (!activeBoardId || !activeClassroom) return;
+
+    void prefetchBoardStorageItem(queryClient, activeClassroom, activeBoardId, isTutor).catch(
+      () => undefined,
+    );
+  }, [activeBoardId, activeClassroom, isTutor, queryClient]);
+
+  return null;
+};
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 9ae1b9d6..c65e3ccf 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -3305,6 +3305,9 @@ importers:
       common.utils:
         specifier: workspace:*
         version: link:../common.utils
+      modules.board:
+        specifier: workspace:*
+        version: link:../modules.board
       react:
         specifier: '19'
         version: 19.2.7