T
top tiler
why do you need a laser how big are your jobs?
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'tis enough to lose a 2mm grout line though..........But as I said in my post, the theory of both systems makes the level more accurate as you are compensating for the discrepency every time you turn the level. Whether or not our eyes and personal tolarances are good enough is a different matter altogether.......Grumpy - although I fully understand your logic, I'd really love to see it in action over a 10mt run. I really do think that over that length, there are so many things that could go wrong - for instance pencil marks being slightly up or down each time you mark, that I really do not believe that the final mark would be very level with the start mark. I bet a penny (since I is poor and there is a recession on) that it would be more than 3mm out.
Whereas with the Laser - a 3mm accurate one - you are guaranteed to be maximum 3mm out either way. Which - over 10mt is pretty damn accurate, all things taken into consideration.
And as for meeting up with the rest of the room - a laser wins hands down. As it is continually projecting its line all the way around the room - you can just leave it switched on - and be guaranteed that if you stick to that little red line, by the time you get go all the way around the room, you will exactly meet your start point.
Paul
BTW - I'm not actually tiling anything 10mt long. Just using it as an example, as its that distance that lasers are generally measured in, accuracy wise.
PS - of course if you want true accuracy - it has to be a water level. But a pain in the butt to use.
That is very true mate It was used by they roman for years and years before a lazer was thouht of lol