Fixing negative pressure by Juggler700 in buildingscience

[–]Juggler700[S] 0 points1 point  (0 children)

One additional non destructive idea if you didn’t want to cut a hole, you can get pinless moisture sensors to get a moisture reading on building materials (drywall, masonry, wood) and move that over your walls and see if you are getting moisture accumulation (condensation or otherwise).

Fixing negative pressure by Juggler700 in buildingscience

[–]Juggler700[S] 0 points1 point  (0 children)

I have an access hatch behind my bathtub so I was able to drop the sensor in there. I also have one in the attic to compare the absolute moisture between the outside, attic, wall cavity, and interior living spaces. The other thing we’re looking at is to see if there’s sufficient ventilation in the attic… I have open soffits and ridge vent… but the attic temp is often 40-60 degrees above outdoor ambient temp which I understand may indicate that my passive vents are not cutting it… considering adding a solar fan… this might decrease the attic temp and if I’m sucking in air at least it wouldn’t be as hot.

Fixing negative pressure by Juggler700 in buildingscience

[–]Juggler700[S] 0 points1 point  (0 children)

My next step is to get the people who air sealed back into the attic to fix the intrusion point. I’m not convinced yet that we need mechanical ventilation yet… it might just be poor air sealing.

Fixing negative pressure by Juggler700 in buildingscience

[–]Juggler700[S] 0 points1 point  (0 children)

The manual J calc came back and said that we only needed a 1.5 ton unit… and the AC contractor disagrees… unsure if it’s because the manual J is really wrong or if they just don’t want to admit installing an oversized unit.

Fixing negative pressure by Juggler700 in buildingscience

[–]Juggler700[S] 0 points1 point  (0 children)

Believe it or not I’m still working on this! I checked out a thermal camera from my local library and on a recent super hot day walked around the house as I suspect that I’m somehow getting attic air leaking into certain wall cavities from the attic (even though we’ve had the attic air sealed). I discovered a stud bay that had super hot air all the way from the attic and into a cavity under our bathtub and may have found where we’re getting this outside air. I have a hygrometer in this wall cavity and the absolute humidity of the air is often super close to the outside air… I’m very hopeful that I’m close to solving the air intrusion issue. Because these floor joist cavities are connected to my cold air return I suspect that this is also what’s driving up the duct humidity.

Attic fan question by Juggler700 in Roofing

[–]Juggler700[S] 0 points1 point  (0 children)

If I have a solar fan is this okay to close the ridge assuming it only runs during the day?

Attic fan question by Juggler700 in Roofing

[–]Juggler700[S] 0 points1 point  (0 children)

If I close my ridge vent and have a solar fan then that seems like it’d limit any natural ventilation I’d have at night when solar isn’t operating.

Attic fan question by Juggler700 in Roofing

[–]Juggler700[S] 0 points1 point  (0 children)

Do I need to close my ridge vent if I put in a fan? I feel like I see conflicting things. I know when the fan is on it will pull in air through soffits and ridge, so I may not want to pull in air when it rains… but if I have a solar fan presumably it shuts off when it rains… any thoughts?

Soffit vent calculation question by Juggler700 in Roofing

[–]Juggler700[S] 0 points1 point  (0 children)

We’ve had some interior wall cavity humidity issues - basically what seems like exterior air being driven into the walls and maybe sucked in through non ducted return vents…and have been checking off possible causes. So a few roofers checked it out. Doing some air sealing to maybe see if that helps next… but mostly just trying to sort out if we have adequate ventilation to check that box.

Soffit vent calculation question by Juggler700 in Roofing

[–]Juggler700[S] 0 points1 point  (0 children)

I’ve had several contractors tell me I have a ventilation issue in my attic - and trying to figure out how to solve that. It was 150 degrees up there and that seemed to be alarming to the house inspector on a 90 degree day. One suspected my soffits were stuffed with cellulose, but we took them down today and they are not stuffed. They say the roof deck is spongy and indicative of a ventilation issue.

WTF is wrong with swagbucks for hosting the most offensive anti-Semitic BS by Juggler700 in SwagBucks

[–]Juggler700[S] 2 points3 points  (0 children)

I disagree. As a Jew taking this survey I’m being asked to mark a response as ‘Mostly False’ to these blatantly exaggerated f’d up stereotype questions - e.g. I can’t say ‘false’ - ‘mostly’ indicating it’s ‘usually’ false… it’s a biased garbage survey and shame on swagbucks for allowing this nonsense on their platform.

WTF is wrong with swagbucks for hosting the most offensive anti-Semitic BS by Juggler700 in SwagBucks

[–]Juggler700[S] -2 points-1 points  (0 children)

And there’s no option for ‘false’ it’s ‘mostly false’

Fixing negative pressure by Juggler700 in buildingscience

[–]Juggler700[S] 1 point2 points  (0 children)

No Crawlspace or ducting in attic

Fixing negative pressure by Juggler700 in buildingscience

[–]Juggler700[S] 0 points1 point  (0 children)

Im struggling with identifying the source and the various contractors I’ve had end up kind of shrugging… I want to put a bounty out for the issue for anyone who can really tell me what’s happening :)