Hi FreeD, you get the jist of the forum yeah??? Here you go - Day joint is the name given to a jiont to break an are into a smaller managable size but it prob aint anything to do with joints you have seen before ie. most buildings have expansion joints vertically or horizontally and you have to mirror these joints through and incorporate them into your render or whatever, also depending on the system or product or substrate you are using the spec may require an expansion break or stop joint either horizontally or vertically and you will also sometimes find horizontal joints at floorzone level of multi storey buildings if the engineer requsts one it will allow for movement between floors if there is a high deflection. Hope this helps. See nothing in there about smokin joints all day at work.