On May 13, 5:55*am, 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

If you use the 'professional' offset on 3-tab the out of square will
hardly be noticeable. The bundles give the amount to offset each row
and you wind up with the 'lines' running up at a diagonal.

In general, always avoid the layout that resules in straitht lines
running up the roof - looks poor and is a sign of amateur work.

Harry K