dormer window

Should the walls with circles be shown as internal walls? The vertical walls will act as cheeks and will rest on the rafter trimmers The wall circled should be detailed as an internal partition wall. The vertical walls will serve as (cheeks) and will sit directly on the rafter trimmers. No wall...

I arrived home this week to find my builder had fitted out the rear dormer bathroom windows and Juliet balcony windows, BUT also added extra UPVC all the way up from the windows frames to the soffits which I think looks rather ugly. The left picture shows expected design from the final drawings...