I want to add an addition on to my garage. I want to continue the
side wall in a straight line behind the existing garage. In the past
when I have made additions like this I would run a string along the
wall from front to back. connected at the front and when the string
touches in the back that would be the line to follow. This gives a
crude alignment but it's not the most accurate, and in this case the
garage has 3/4" trim boards on the corners which will make this method
pretty hard to use unless I remove the trim, which I prefer not to do
until the addition is framed in.
I understand these lazer levels can be used for this same purpose, but
I am not sure how. For one thing, I can not measure at ground level
because the level would be against the concrete, not the garage wall,
and that concrete is not exactly even along the edge of the wall. In
some places the wall is one inch overhanging the concrete, because the
concrete was never poured exactly straight. Therefore the level will
be at least one foot above the ground.
The plan is to build this addition in pole barn style, so I want the
post exactly in line with the wall. Or actually it will be placed
back 2 inches from the wall to accomodate the thickness of a 2x4 plus
the plywood 1/2 inch siding.
How do I do this? I should note that I will be doing this without