"ben" wrote in message
...
I'm cutting off the bottom 20" of my t1-11 panel siding to replace it
and want to cut it off straight. The bottom edges of the siding are
rotten, so I can't just measure up from those 20" as a guide. So I
bought a chalkline but I now realize, I don't know how I can make sure
it's level. The length will be about 27'.

How can I level this? Or is there a better way to do this?

thx!



Use a rotating laser like ceiling hangers use.