float&set

P

plstering

THIS IS NOT FOR TIME SERVED SPREADS.
THIS IS ONLY THE WAY I WOULD RECOMMEND TO A NEW STARTER
AND YES, THERE ARE OTHER WAYS TO DO THIS THAT WILL BE FASTER

Right first things first, you can either use dots (small pieces of plasterboard or ply wood that sits on a dab of plaster) or you can use long clout nails (these should be galvanised or sherodised so that they dont rust as this will show through the plaster) and once you have chosen, the next thing to consider is 'do you have a door casing on the wall you are going to plaster because if you do then you will need to set your dots to the same level so that your wall is not too far back or forward.

now go to one side of the wall and set a dot in the bottom corner, then go to the other side of the wall and set a dot in the other bottom corner, now with the help of someone else you can pull a string from one dot to the other, you can now adjust the dots so that they are in line with the door casing. let them set.

now with the help of a long spirit level (or a piece of straight wood cut to the right hight with your smaller spirit level held to it) set dots in the top corners and adjust them with the level until they are plumb with the bottom dots. let them set.

now take your string line again and pull it across the bottom dots and set intermediate dots at about five foot intervals ( you will use the dots to set the screeds so you need to set them where your straight edge will reach from one screed to the other) then do the same for the top dots. let these set.

you are now ready to form the screeds, you need to put a band of plaster vertically between the dots (do one screed at a time). the band needs to protrude slightly more than the dots, now use your rule to push the band of plaster back to the dots, and cut of any surplus plaster either side of the rule with your trowel then gently slide your rule off the freshly formed screed as not to disturb it. continue this process for all the dots. now let all the screeds set.

now is time for floating, damp down the wall and screeds (this will control the suction and give you a bit more time to get it right) now start filling in the bays (sections between the screeds). do one bay at a time, fill it in and run your rule up the screeds cutting of the plaster, then fill in the hollows and rule of again. keep doing this until there is no more hollows and then move on to the next bay and repeat the process.

if you have a door casing on the wall you can use this as a screed.

let this all set.

now your wall should be full, flat and plumb. all you need now is a key for the finishing coat. tou create this key you will need to screw some screws through a polly plastering float (the sharp end of the screws should come out on the face of the float by about 2/3mm.

4 or 5 screws will be fine, now you need to rub this all over the wall in a circular motion with the screws scratching the wall (creating key).

and thats it you are now ready to skim the wall.

before skimming you should damp the wall down to control the suction.

NOW I WILL SAY IT ONCE MORE, THIS IS A EASY GUIDE FOR NEWBIES AND THERE ARE FASTER WAYS OF DOING IT FOR TIME SERVED SPREADS.
 
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