Quick post, Just wondering whats the best method for determining how off a floor is interms of flat and dips/humps before applying Slc and are screws the best way to mark rquired height?



Never used Slc before and want to do it right.

anyone used a Water level for this ....?

use a long straight edge, run it along the floor and you will see the dips in the floor, mark them with a pencil, and you know these are the areas that require leveling, you can use screws or packers to help you, but i tend to do it by eye.

Screws are ok, make sure no pipes in the floor though. Water levels really ned 2 people. Laser level needs just one but a straight edge and a level is my way mostly.

what do you use as a straight edge and whats its length?
Was to get an 1800mm level but could just use a straight edge and my 1200 level ontop if required. I Think its a water level in this video and looks like other end has been setup next to wall allowing one man to operate it but i could be wrong, what do you think?

YouTube - Level pins.mpg

Yes water levels can be used and great if yo need to go around corners etc. A laser is easier to set though.
oh and I posted about thes pins over a week ago
SLC advice

I either use screws or even bits of ply or plastic sheet about an inch square dabbed on with silicon to the required thickness. Don't go wasting money on any specialist gear for doing nothing but giving you a guide for a depth of slc.

Yeah sir ramic your post is whats set me thinking, haha. When your on about a laser level do you mean set it up at a desired height and measure using a tape from floor to where the laser hits the tape? Done that before but took ages and water level look quick in your previous post SLC Advice and if one ends setup at your required height, syringe marked say with tape and water coloured youll be able to see it at a distance or am i just trying to convince myself??

Nope laser lot quicker. Just set laser at about 600mm height then use a ruler

ok, is it as accurate over 10+m? not sure my stanley laser will beam that far

1 So setup laser anywere in room at 600mm on highest spot if its obvious
2 if not go around room and find highest spot and move laser to there keeping it set at 600
3 now go around room again and mark differences from 600
4 place screws at difference depth on marks you have made

Is that the best way to do it?

600mm is just a measurement. A self leveling laser line will give you a level line to work off, it could be any measurement. Once the laser is switched on use a staff to take heights of the laser line in different areas of the room. When you have established the high point take a measurement of that point on the floor to the laser line....for instance it could be 580mm ...then walk around the room noticing where the dips are as shown in that video. If you were to find a low spot where the ruler said 590mm you know the floor dips 10mm and so your packer or screw needs to be 10mm above the floor. When using a screw or packer you then double check with the staff or ruler you are using that when placed on top of packer/screw that the laser line corresponds to the high point ...ie, 580mm on your staff. That make sense ?

Yes. Great advice and a big help.Thanks