Wooden Frame Around Window by Jacob Schröder

I have two questions: First circled in blue I am asking for help on how to fix wooden frame around the window? Should I just fix it on the thermal insulation or I have to fix it on the concrete wall?
Second in red. How to waterproof wooden frame and the rest of the insulation under the window sill? Thank you. 

Leave a Reply

Your email address will not be published. Required fields are marked *

Post comment