richardbrown said:
but what is the correct method of laying the screeds. if you are gonna sand cement and skim.
This is the way I use screeds Richard, when rendering I work right to left (I'm right handed).
Firstly I put a level on the wall near the internal to see if I need to the screed on thicker at the top or bottom to get it plumb, then I put a vertical screed about 300mm wide down the internal and rule it off, then I check it with the level and make any adjustments needed. Now I'm not saying that I make sure that they're all bang on plumb but if not they're always close.
I then do the same at the other end of the wall. The thickness of the screeds may vary taking into account of anything that needs getting over ( a poorly fixed lecy box or an obvious bow in the wall). If the blockwork is good and there aren't any other problems then I aim to have the screeds about 11mm thick. I don't leave the screeds to pull in or float them over, I just put on across the top of the wall from right to left coming down the wall about 400mm and then rule of from one screed to the other. Once I'm happy that I've got it straight I drop down the wall another 400mm and repeat the process until the wall is finished. This all sounds very long winded but is a very efficient way of rendering, your always ruling off fresh muck which can go straight back on the board and be reused. And I've worked alongside and employed enough spreads to know that I'm not slow. Anyway that's enough bla bla bla