Water dripping from electrical switches behind walls

“Last spring I wanted to hang a heavy mirror on that wall. Knew exactly where the studs were, and more to the point, exactly where the water line ran behind them. Didn't have to guess or trust a stud finder.”source ↗

“Recently one room in my house feels noticeably damper than the rest and has a faint musty smell. No water stains or bubbling paint, though. I initially figured it was poor airflow, but started wondering if there might be a slow leak somewhere.”source ↗

“Anyone else dealt with a musty room where everything looked fine? How did you track down the cause?”source ↗

“Saved me already when I wanted to mount shelf and knew exactly where the cables are going.”source ↗

“This tub was put in 16 months ago. We never had the sound behind the wall or the water pooling on the rim.”source ↗

“There are spaces longer than 6 inches, especially along the side wall, where it’s dry and then wet in the middle. I’m at a loss.”source ↗

“Came home to a stain and bubbled paint tonight in the ceiling of our kitchen that is right over a shower stall.”source ↗

“This obviously looks like it’s been brewing for a while.”source ↗

“Figured I was just being paranoid but wish I investigated more then. Obviously it’s been leaking for a while.”source ↗

“I have an area of damp along the top of my bathroom skirting as well as behind some sealant just behind the shower glass”source ↗

“I've pressed on the wood and it's only wet after a shower, so I'm trying to figure out if it's likely coming from poor sealing on the inside edges of the shower itself or worse case from the pipes being the tiles”source ↗

“I have random water piled up in the house. Yesterday it was in the garage. Today it is in the living room.”source ↗

“Wondering if something is happening and I should get it checked?”source ↗

“I think I was too violent when unscrewing the thingy and it somehow scratched a hole in the back part???”source ↗

“A few weeks ago, I noticed what looks like a water stain on the wall (see pictures).”source ↗

“However, it is possible there is a leak behind drywall or tile backing.”source ↗

“Does this look like a leak? Should I have this checked out by a professional?”source ↗

“Having trouble figuring out next troubleshooting steps without having to cut behind sink cabinets.”source ↗

“Just odd that it has been intermittent. Figured it would be more consistent.”source ↗

“Leaks can be hard to re-create.”source ↗

“I have a water line leak so small it would be very expensive to find it (and one plumber said they could spend hours looking and might still not find it)”source ↗

“Plumber today said I could call in specialists with a lot of equipment but they might rack up hours of fees and still not find a leak this small.”source ↗

“Toilet take a long time to flush, if that means anything”source ↗

“When I backed out the large screw-in drywall anchors, I could hear them tapping something plastic behind the drywall.”source ↗

“Looking through the existing holes, it appears the last owner drilled through a plastic pipe. There are at least two small holes in it.”source ↗

“Does a DMV Vent sound like the most likely explanation? If so, would you open up the drywall and silicone over the two screw holes, or fully replace the damaged section of pipe?”source ↗

“Got a piece of the ceiling tile removed from basement bathroom to examine some water damage and found this.”source ↗

“It “looks” like the tee may be leaking at the coupling?”source ↗

“Not seeing any obvious gaps or cracks that would allow this much water in. Any ideas?”source ↗

“I have a recurring moisture issue on a wall in my master bedroom.”source ↗

“I am having massive water stains underneath my windows.”source ↗

“The water damage companies we’ve hired to come out are all over the place (some saying our walls are soaked, others saying they are dry, some saying it’s an active leak, some saying it’s just humidity and condensation).”source ↗

“We have no idea what to do.”source ↗

“Found some water near our water softener and ac/furnace. No recent rain. Any ideas where to start??”source ↗

“My wife noticed water dripping down the switches earlier today and when I took the plate off, you can see a whole ton of moisture back there. Is there cause for concern of mold within the walls now? What can also be causing all this moisture within the walls?”source ↗

“After about a year, we noticed the drywall in our closet which sits adjacent to a shower had water damage.”source ↗

“About a year or two after cleaning the closet out I saw the water damage was back. I opened it up again and this time I want to do it the right way.”source ↗

“That water trail running down the wall is a dead giveaway the drain line is leaking back into the house.”source ↗

“Got a similar setup in my place, the washing machine drain hose was barely pushed into the standpipe and it'd slip out whenever it hit the spin cycle. Check that connection first, takes two seconds and you won't have to move anything heavy”source ↗

“Looking up thr cavity we cannot clearly track it beyond seeing the drips running down the wiring.”source ↗

“So, now we want to figure out how to track the drip. But not sure what to do.”source ↗

“I really looked at it today and it was dark, and one side actually had a soft spot down by the baseboard.”source ↗

“I’m really embarrassed I let it get like this, but how can I tell if it’s mildew vs black mold?”source ↗

“Sometimes when I take a shower I’ll get allergy like symptoms (really only a runny nose) but it’s definitely not every single time.”source ↗

“I just noticed this the other day, the two moist streaks running down the exterior wall.”source ↗

“Just break it to me.. there’s water damage back there isn’t there ?”source ↗

“My concern is the moisture continuing to pool and have mold growing inside the wall”source ↗

“Trying to plan my attack on repair. We just had a new washer/dryer installed, and then the issue started. My partner things it's the dishwasher located right next to the new washer/dryer stack.”source ↗

“I’ve had moisture on my third-floor bedroom ceiling for the last couple of years, but it didn’t happen again until yesterday where it’s now peeling off part of the ceiling.”source ↗

“I had someone out to look at the roof and they didn’t find anything (they were a general contractor though so not ruling it out). I’ve had other contractors out as well but no one has identified the problem.”source ↗

“I just don’t see a clear entry point or any damage.”source ↗

“I have spent the last couple of weeks trying to track down a leak.”source ↗

“Constant drip forming on the sheet metal directly above the compressor, underneath the left side of the freezer compartment”source ↗

“water seems to be traveling from somewhere else and surfacing at this one spot, but I can't trace the path without pulling panels”source ↗

“My question is… HOW do I even begin to look for the source? If it’s roofing related, how do I confirm? I don’t have a crawl space so can’t check under”source ↗