Bad venting, those soffit vents suck. Or bad roof vents. Or no vapour barrier and giant gaps. I’m gutting this shit all day. Bathroom fans, plumbing&electrical, hatch not weatherstripped etc etc.
@@ncooty ya absolutely, this is just bad venting. Especially with the white styro vents and then someone jammed the batts below too hard, pushes the styro into the roof sheathing and blocks intakes.
After thinking about the for a while. I believe that the insulation was missing and or attic access cover was missing and letting lots of warm are in the attic and then condensing and freezing in the winter. This house was a rental and is in the Poconos in Pennsylvania and gets pretty cold. In my experience when there is wide spread signs of moisture on only the under side of roof that's the problem. It didn't help that there was poor ventilation and a bathroom fan venting out a vented soffit.
I believe you are correct about the ridge vent, there is none. And you can tell it was insulated correctly and I saw the rafter mates but it was unknown to the viewer if there was soffit vents. Soffit vent plus ridge vent equal convection.
There's a couple of issues. First, intake vents dont work without exhaust vents. Second, like someone else pointed out, the bathroom exhaust vent appears to run to the eave where its moist air gets drawn back in. Given the even condition its primarily the first issue.
Any time I see a builder using OSB, I shake my head & accept that we are not building quality. We have a pair of house flippers in our area that are facing several dozen lawsuits now. They have replaced roof on to-be-flipped homes, cutting off sewer vents below roof deck and running bathroom and dryer vent exhausts into attics. All of the rooves have had to be removed, decking, rooftop units and some joists (low slope roofs) all replaced at the homeowners expense.
I'd check to see if the soffits are actually vented - solid soffit might be installed. You generally only need ridge OR gable vents - having both is actually less efficient at drawing air along the bottom of the roof. If the soffits are vented I'd be really surprised if a bathroom shower wasn't venting right into the attic.
@@2blkSSs I'm a master roofer glad you asked. Sometimes you can calculate the opening sizes, amount of top vent vs bottom vent. Ridge vents are way better than gable vents. But generally best option is to close off the gable vents if you're going to put a ridge vent - it forces the air up along the bottom of the roof. Did you wind up having vented soffit or did someone install solid soffit? Check to see too that the insulation isn't out into the soffit covering up the venting.
@@drewnicest4319my house was built in 71’ and has gable vents, probably 6’x3’ with solid soffits. I was planning on installing soffit vents and then a ridge line because the heat in my attic (DFW) is insanely hot. Should I skip the ridge line or is it worth it to cover the gables and do the ridge line?
@@2blkSSs it's worth it to switch to a ridge vent especially if you're taking the time to put soffit vents in. Maybe consider a solar attic vent as well if it gets super hot
You can't have both gable and ridge vents. It's one or the other. So the gable vents were adequate. Simply block off the gable. You may want to take a closer look at those soffit vents to make sure they're vented on the exterior (not solid). Also, make sure the bathroom exhaust ducts are terminating to the exterior and not the soffit or attic area.
I wonder if there is any underlayment on the roof. Looks to me like the primary source of the moisture is coming from the roof side, since I am not seeing much rot\mold below the sheathing. The sheathing moisture issue appears to be consistent from the ridge all the way down to the soffits, which leads me to the think the issue is with the roofing, & not primarily a venting issue.
Having gable vents is not unusual, that isn't the problem. I have the same: OSB sheathing + gable vents and the OSB looks like new after 50 years. Something went seriously wrong in this place..
There appears to be a white vent hose up there either exhausting into the attic or the soffit which in both cases would just suck the humid air back into the attic
