If your window does not have trim you can still utilize all three of our mounting methods: Angle Brackets, Hooks and Extension Mounts.
Hooks and Extension mounts will install the same whether the window has trim or not and Angle Brackets can be used by attaching a Mounting Block on the wall above the window.
All measurements and installation information for HOOKS and EXTENSION MOUNTS will be the same as described in the sections pertaining to each mounting method in the following links.
Hooks: Insert Link to HOOK page
Extension Mounts: Insert Link to EXT. Mount page
Installation instructions for using MOUNTING BLOCKS will be described in the video linked below: