The theory with (water-based) wood glue is that it makes fibres in the wood swell up so that the two pieces of wood that you are trying to bond just sort of meld together. Clearly that is a very weak joint whilst it is wet but, when dry, it should be near the strength of a single piece of wood.
|left side and four floors glued|
|two sides and floor fours in place|
|one of sixteen tacks|
I then pinned through each side wall into the floors - two pins each side of each floor. I managed to get fifteen out of sixteen pins in without mishap. One of them is very slightly nudging out the ceiling of the basement. It had to be the ceiling below not the floor above, of course, where it wouldn't have mattered one jot. I have never had to tack a house together before - just glue, so this is a whole other experience and not one I am particularly enjoying. Fortunately the pins are on the sides and I will be using masonry paint so, with luck, you'll never know they are there.
|the back is on|