Tetris 2: the next level

The blocks for the upper walls arrived today and are stacked on the new floor:


I'm hoping it's a minor technicality, but this appears to have necessitated the propping-up of the first floor from below:


Meanwhile, at the back, another mysterious bit of wood has been added to the lintel of the patio doors. I assume they mark something, but what, and on which axis, I've no idea.


At this morning's meeting the builders introduced the possibility of working through part of their August holiday to make up time. No promises though.

Tomorrow: the brickie's return.