In article ,
cj wrote:

i have a lean to (sp?) sort of roof attached to a neighbors house that
is out of square by quite a bit. the lean to is constructed of 2x8
joyces on top of that 1x4 slats and then 1/2 inch osb board. the slats
and osb board extended past the joyces on 2 sides which means they can
be trimmed. i guess it's not that big of a deal that the roof is out of
square except that we will be covering the roof with 3 tab shingles and
we don't want the shingles to look out of square(the seams) where would
be a good place to start to ensure the shingles look square on an out of
square roof?
thanks, cj

Since you asked for spelling help, just abbreviate lean-to and you're
good. But, uh, Joyce might need a little help.