My house is approximately 1 year old and I had it built myself. I hired all the subs to do the work. Unfortunately, recently, I've noticed an awful smell in and around the powder room. This smell is only noticeable if it is raining outside. I thought a contractor may have left me a "present" in a vent in that bathroom but the smell is only noticeable when it rains. Can someone give me clue as what/where this could be coming from? There's a pedestal sink and toilet in the powder room. My HVAC & plumber contractor has gone belly-up so I can't call him to come smell out the culprit.
Thanks, tired-of-the-stink!