help multiple roof penetrations
Reroofing my 100+ year home tri-plex. (5 layers, shake, rolled & tared, 1 layer interlock, 3tab, top layer interlock, and some SOB ran rolled layer 3″ under the 2nd layer of sidding and tarred in the J-channel, so much for saving the siding during this. argh! unplanded freeze board is now in the project to dress that back up.)
Anyway, I have 6 penetrations to relocate and place (3-3″ plumb vents, 3 bath vents). I know all their placements per code. My question is where would you place for asstetics and leakage concerns? This is a lower 1 story 5/12 butting into 2nd floor side wall. Aprox 25′ from rake to 2nd floor side wall, leaving about 14′ (minus 1′ overhang and 10′ from any horizontal window location) to place first plumb stack, Run is only about 12-15′ from eve to ridge.
Would you increase spacing so each flange is more independent from each other and better insuring their water tight when placing roofing making for about a 12′ long line of vents? Place closer to the ridge to lesson amount of potential water flow hitting them? By placing them lower or mid height is their cause for concern of making a “snow wall” (michigan) and ice dams with 12′ line of obstructions? Would you place them in a sq pattren with 3 plumb above and 3 bath below and would you be worried about having pens aligned vertically on a roof and leakage.
No matter what it’ll be a PITA and hard to avoid it from looking like poo. Just trying to address placment based on greatest potential of leak failiure and lessoning the poo look. Oh ya this happens to be a side facing the road and not the back yard.
thanks so much
Replies
In most circumstances you can tee together plumbing vents in the attic, to reduce the number of roof penetrations.
First off ..
First off, if you have an attic space, you should tie as many vents as you can together to minimize the number of penetrations as well as to address aesthetic issues.
Secondly, I think high on the ridge is the way to go ... 1. Less noticable, 2. reduces the possibility of snow and ice shearing them off as there is less snow to slide.
im with the others suggesting the boots be higher up on the roof.
if its possible, and your concerned about the esthetics, you could re route your vents to the back side.