building dilemma: pit ventilation
Every tradesman does their part, they are experts in what they do, which is why I accepted their quotes for the work. I’m just the customer and the reluctant coordinator because they don’t bother to communicate and have enough job choices that customer satisfaction doesn’t cross their minds. Here is the problem:
New micro-pit system installed after much debate vs type of sand bed drainage, by a firm specializing in this. What goes on in the house isn’t their bag, it’s for the plumber. The pit vent pipe, 10cm, should terminate at a height above the roof ridge and as far as possible from roof openings, including the chimney, to be acceptable to SPANC. We have already had the pole vs on/in the house debate… The plumber installed the pipe in the house in an optimal way from a technical point of view, but not aesthetically, leaving a 10cm pvc tube to be hidden in a formwork in the bathroom and a hallway, to get near the ridge of the roof and says that the roofer must attach the pipe to a “socket tile” as it exits through the roof. But wait, said the roofer, I can’t break the peak of the roof, and it’s near a skylight and the chimney and the zinc work that surrounds them. It does not want to pierce the moisture membrane and insulation already installed….
Apparently it’s not acceptable for SPANC to use the chimney flue for the pit vent pipe, which doesn’t make sense to me, since the purpose is to vent gases, contained emissions indoors, either from a pit or a fireplace/woodstove, and conveniently the chimney exits above roof ridge level.
So my non-expert compromise is to go through the roof under the ridge, near the chimney and attach a vertical pipe that rises above the ridge, attached for wind reinforcement etc. at the fireplace. The roofer must be able to properly seal the outlet around the pipe. Any advice welcome!
Looking around, now that I’m educated on the subject, I have yet to spot a house with a 10cm pvc pipe rising above the roof ridge as a telltale sign that they have a new Compliant pit installation. Does this mean that the current regulations are not more respected than the previous ones… and that the age-old debate on non-compliant properties will last a few more years?