Marc M wrote:So in your photo, the chimney is short correct? Assuming the 10' mark is correct. ( Lets just say it is for S&G )
*Assuming* my 10 foot mark is correct, yes, the chimney is too short.
I estimated the 10 foot mark based on typical shingle exposure and a 3/12 slope, that appears to be no greater than 3/12, and then did a '10-feet-ought-to-be-about-here' guess. Same applies to the chimney height, but I may be further off on the height because I didn't know if those 'bricks' in the chimney were 4 inches high or 6 inches high, and that makes a big difference in height.
I was hoping the 10 foot mark being drawn at the top of the chimney was not confusing as it is measured at the 2 foot down mark - but that would have complicated what was being shown at the 2 foot down mark as the roof to the right does not look to be 10 feet away at that level.
If a chimney on at a flat roof, then it needs to be 3 feet high minimum above the flat roof (higher if there is any part of any structure within 10 feet) - this also applies to a chimney with the flue
at the ridge, you measure down to the ridge for the minimum 3 foot height.