Re: Sideventing of main stack
Posted by hj on June 13, 2004 at 09:39:23:
In response to Re: Sideventing of main stack
Even if side venting is permitted, it usually requires that the vent be extended vertically above the roof. It would not normally be acceptable in an area subject to freezing, as yours appears to be, because the humid air would coat the interior with frost, and a long vertical line would eventually freeze closed, plugging the vent. A vent terminated through a side wall will be subjected to pressures, positive or negative, when the wind blows past the building.

: Is it code acceptable to have the main vent stack vented on a sidewall instead of through the roof? The reason I ask is that a neighbor down the road has had their roof vent sheared off two winters in a row by heavy snow load on a metal roof. When the snow breaks loose it has broken or sheared the vent. A contractor (not a plumbing contractor) "solved" the problem by side venting the main stack, eliminating the roof exit. If this is acceptable I would like to do it on the log home our son is building.

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