I have a 40X80 polebarn which has a chimney located on the sidewall, which right-angles up besides the roof edge. I plan on installing a new chimney straight up thru the roof, just near the peak. That way I can put the upper edge of the roof flashing under the ridge moulding so I won't have any leak problems. My question is, is there any problem locating a chimney that near the peak? I already have three new 3' sections of class A chimney, that were inside the barn when I bought it.