roof vents
Posted by alex nikolic on January 18, 19100 at 09:40:43:
Recently the vent in my attic became blocked with snow cyrstal or ice
, this caused a negative air pressure and sucked the water out of the traps cuasing
gases to eneter in to the house hold. Why did the pipe block up with snow cystals, does it have to be vertical , i how i prevent this next time .regards

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