I was thinking the same thing as Marian Smith — sounds like it might be sleep apnea. I live with someone with sleep apnea and without the c-pap machine, I could easily hear the snoring from a bedroom upstairs with the door closed while I’m sitting in the living room downstairs. It seriously makes me understand why people call snoring “cutting a log.”
If the snoring is indeed that volume, it’s not really a reasonable amount of nighttime noise — you wouldn’t insulate/soundproof walls so well that neighbors couldn’t hear each other vacuuming or using a drill or something. It’s excessively loud noise for nighttime hours.
From a landlord perspective, is it appropriate to address a medical issue with a tenant though? It seems like a tricky area because on one hand, snoring tenant’s medical conditions are private and he shouldn’t /have/ to do anything about it. And it definitely feels like it would fall into some kind of murky area to cite snoring tenant for excessive noise if it’s for something like a sleep disorder.
But similarly, the other tenant should also have the right to enjoy peace and quiet during quiet hours. Is there some kind of sound proofing that could be purchased to hang over the wall or something like that? (I’m not describing this well, but instead of putting more insulation in the wall, is there something that could go on the exterior of the wall? In the complaining tenant’s unit, since he’s the one who is being bothered. Like I’m sure there must be something people use when they need to record in areas that aren’t recording studios.)
To be clear, I don’t know what the answer is — I’m just laying out some of my reasoning. Curious to hear how the experienced landlords respond to this!