I'm shopping for an auto laser level -- a device that mounts on a wall and projects a vertical and horizontal laser beam on the wall. I want to check the posts and beams in the crawl space because I suspect there is some uneven settlement, or a sagged joist (some posts have been replaced recently and may be cut too short, causing the joist to sag). What prompted this project is part of my hardwood floor has split into two levels about 1mm apart.
I thought a laser level would be perfect because it projects a straight line so I can checked for joist straighness and "horizontal-ness" by projecting the beam near the edge of the joist.
I saw something like this at hardware store for $40.
There are many styles of self-leveling laser level. The one above needs to be attached or held against a wall/post and it projects beams on the wall. Another type mounts on a tripod and project a horizontal beam 360 degree around.
Does anyone have any thoughts on the instrument or the way I plan to use it?