The men finished the dwarf wall and got on with the floor. These guys have to "raise the floor" to get it onto the same level as the rest of the house. I spoke to the Floor Man - "You've got to raise this up a bit, how much concrete and ballast are you going to use?" "Err, based on the dimensions and knowing the density of concrete, I'd say about 8 tonnes" The Deputy Floor Man raised a surprised eyebrow - "Wot?, sod off Jim, I ain't mixin', humpin' an' layin' 8 tonne o' muck, you can soddin' well do it" I sloped off sideways muttering something about 'how many teas were required' and returned some 5 minutes later. "Err, me and Eric have had a word and we're going to put in a jabalite 1 floor which is much better and has greater thermal properties, and, err, more expensive" "I'm not paying anymore, it's not in the contract, stick with the plan" "Ok, we're going t...