Quote Originally Posted by GMcDowellJr View Post
How far off did you find the numbers between the two systems?
It wasn't so much the disparity between the bw/cw methods (though obviously that's a concern) - it was more what got touched on in that twitter sidechat - that materials, having depth, really can't talk - to any great accuracy - a single orientation, so "elevation" takeoffs (even on strictly orthogonal buildings) are a bit, well, silly.

And I think we all know that - the trad. markup of "scope" is - at best - a navigational aid.