diff --git a/defaults/main.yml b/defaults/main.yml
index 0a26f1f..d7d6cea 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -11,6 +11,13 @@ fastbuild_cache_dir: C:\fbuild
 # User who will own the FASTBuild configuration directory.
 fastbuild_cache_owner: "jenkins"
 
+# If true, then add a scheduled task to regularly trim the cache.
+fastbuild_cache_schedule_trim: true
+
+# How large the FASTBuild cache should be trimmed to (requires
+# fastbuild_cache_schedule_trim to be true).
+fastbuild_cache_trim_size_mb: 1024
+
 # Version of FASTBuild to install.
 fastbuild_version: "1.00"
 
diff --git a/tasks/configure.yml b/tasks/configure.yml
index cc7c158..9370920 100644
--- a/tasks/configure.yml
+++ b/tasks/configure.yml
@@ -11,3 +11,17 @@
     name: "FASTBUILD_CACHE_PATH"
     value: "{{ fastbuild_cache_dir }}"
     level: machine
+
+- name: Add scheduled task to trim FASTBuild cache
+  win_scheduled_task:
+    name: "Trim FASTBuild cache"
+    username: "{{ fastbuild_cache_owner }}"
+    actions:
+      - path: "{{ fastbuild_path_win }}\\FBuild.exe"
+        arguments: "-cachetrim {{ fastbuild_cache_trim_size_mb }}"
+    triggers:
+      - type: daily
+        # This attribute is required by Ansible, but not really necessary for daily tasks.
+        # Hence, we choose a date far in the past.
+        start_boundary: "2000-01-01T00:00:00"
+  when: fastbuild_cache_schedule_trim