diff -r 70de02fd0cd1 -r 49e8f3cef75a src/pyams_content/shared/site/folder.py
--- a/src/pyams_content/shared/site/folder.py	Tue Nov 28 17:26:34 2017 +0100
+++ b/src/pyams_content/shared/site/folder.py	Tue Nov 28 17:27:24 2017 +0100
@@ -52,6 +52,12 @@
     sequence_name = ''  # use default sequence generator
     sequence_prefix = ''
 
+    def is_deletable(self):
+        for element in self.values():
+            if not element.is_deletable():
+                return False
+        return True
+
 
 @adapter_config(context=ISiteFolder, provides=IFormContextPermissionChecker)
 class SiteFolderPermissionChecker(ContextAdapter):