I cut some more spruce at the tablesaw to make some columns that would later support the doors for the extension. These were glued and screwed on to the frame. I could then add cladding to the front panels.
I wanted one single piece of cladding to run the length of the front of the extension right at the top.
I measured and cut to length one of the cladding pieces.
I could then offer it up mark up the position of the doors on to it.



