Size and position outside of window (including decoration)

I’m using the latest GLFW, on Windows 10. I am trying to tile multiple windows, and am running into the issue that the window position and window size setters seem to set the size and position of the drawable area, not of the whole window (so taking window borders and other decorations into account). That makes windows overlap, and title bars end up off screen. Is there a way to set size and position of outer edge of the window, or to query the window borders?

And i just managed to find glfwGetWindowFrameSize while working on another issue, dont know how i missed that. This will allow me to solve my problem.