Questions tagged [condensation]
Use this tag for questions that involve the unwanted appearance of condensate or liquid water from an air stream that contains water vapor. Most often water condenses out of a warm air stream containing water vapor due to a change to a lower air temperature or the air stream passing over a cool or cold object such as an HVAC evaporator coil.
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Condensation/mold on ceiling in bedroom + high humidity
I am having a strange issue wherein along the exterior/west-facing wall of my bedroom (~110sqft/750sqft house) at the junction with the ceiling there appears to be mold growing and some pretty faint ...
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I have doubled up Polysterene 2mm on wall insulation to make 4mm is this ok
I recently applied 2mm polystyrene insulation to my walls with thermal adhesive. I now feel that 4mm would have been better, can I apply adhesive on top of the polystyrene and then add another layer ...
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How do I fix condensation on aluminium step of the front door?
My door frame seems to be insulated well inside all around except door step that is aluminium. That aluminium piece seems lacking the thermal break, and now with cooler temperatures it accumulates ...
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Why is my neighbor's A/C causing my walls to sweat?
Whenever my neighbor runs their air conditioner for an extended period, my room, which shares a concrete wall with theirs, experiences condensation issues (my wall starts to 'sweat'). After ...
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What might cause sporadic small waterspots on ceiling of kitchen?
I have small (ranging from ~1-5 CM) ,sporadically located, water spots on the ceiling of my kitchen that have progressively gotten worse over the last year.
They seem to be right in the dead center of ...
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Is this water heater condensation or leak?
Thanks in advance for reading this and helping me out a bit, as I am not sure if our water boiler needs to be replaced.
We have a AO Smith natural gas water heater that is about 14 years old. During ...
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Can I insulate between a flat roof and a sloping roof
I have an extension on the back of my house which originally had a flat roof. At some point, a previous owner had a sloping roof put over the flat roof which covers it completely (i.e. it is not ...
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Where is the moisture coming from that is condensing on my ridge beam?
I'm renovating my home, and in the course of hunting for a leak in the roof (now found) I removed a strip of drywall that is 8" wide and 16' long, parallel to the 6x12 ridge beam. See image below ...
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HVAC condensation drain and weird concrete bulge [closed]
Does anyone know why I developed a bulge on my concrete near my condensation drain? And what is that copper pipe coming up from the floor?
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Main condensation line drilled and left inside 4"x12" main structural support
Latent defect found by new licensed HVAC technician after original installer of unit said call somebody else. Ten year Carrier warranty now out. Not servicing my area. I called a new company out since ...
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Condensation on air filter
So I purchased my house in 2015 at the age of 24. I was an idiot and did not take care of my new hvac system (replaced when they flipped this house before I bought and is an electric heat pump) like I ...
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What could cause an air conditioner to leak condensation?
For the past couple weeks, there’s been a trail of water leaking from my furnace. I believe it is condensation from the air conditioner. After doing a little research online, I cleaned out the U trap, ...
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Greenish/Gray Mold on all beds and matresses [closed]
I moved to a new apartment unit in the beginning of the year and then I went away for a 2 week trip and when I came back I noticed greenish dust on the the furniture. I google it and found out that it ...
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DIY double-pane window renovation technique? [duplicate]
If a double-pane window suffers from only condensation, can a motivated DIYer separate the panes and spacers, clean them, and reassemble? On a dry day, of course.
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Why plaster in one corner under ground level wet?
One corner of my house plaster wall is starting, this Winter, to show condensations. As you see in the first picture below it's like drops of water starting to form. This is the stair area going to ...
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My condenser dryer is steaming up my kitchen and utility room
An engineer fitted a new pump to my AEG Lavatherm condenser dryer. It still has not solved the problem of a very hot steamy kitchen, when I'm drying my clothes.
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Condensation in bathroom after shower
Everytime you take a shower, the walls and ceiling have lots of water on them. After the shower, some (not alot) of water will come dripping in from the extractor fan duct onto the floor.
Location UK
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Positive Input Ventilation (PIV) suitability for loft with high relative humidity
I live in the UK in a cold 1890s stone walled house which has a condensation issue (partly brought on by lifestyle choice and party due to previous "remedial" works that limit the natural ...
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New external door, lots of condensation
I just had a new fiberglass external door installed (with a half lite). The glass has no condensation on it, but the door itself is covered in condensation!
I installed another door at the front of my ...
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Supply vent condensation
I noticed a wet spot on my bed in My bedroom when I looked up I saw that my supply vent was dripping water. I removed the cover and I can feel the cold draft blowing down from the supply vent. My ...
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Do I need existing wallpaper to help with external damp wall?
We have a north facing 1st floor bedroom (above a kitchen) which has always typically had some damp issues. It has 3 external walls with blank but painted over wallpaper, that gets replaced every 10 ...
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Condensation pipe from air handler is making gargling sound
I would appreciate some help on a new gargling voice coming from my HVAC furnace (first time using this season - this didn't happen last year).
As shown in picture, there are 2 small tubes coming out ...
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Exterior condensation on some newly installed windows
We installed 5 new windows (3 panes) in our house. 2 of them regularly get exterior (outside) condensation, the others are fine (or get considerably less). This happens when outside humidity is high (...
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What is this thing under my window frame?
I've got 2 windows, one with a block of some sort under the frame, and one without. On the one without, in winter, condensation tends to form on the frame, and then the water trickles down the wall.
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Is condensation a concern on duct work that's enclosed in a soffit?
In my 1973 town-home, which is basically a ranch style layout, there's a single hallway that runs parallel to the length of the unit, bisecting the living area from the bedrooms. It is the only ...
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Floor drain is overflowing next to furnace
We have our furnace on the second floor of our home. There is a pvc pipe coming from the top part and it leads to what looks like a floor drain. The last couple of weeks when our air conditioner is on,...
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How to fix wall with internal water damage
We had some work done in our home and we had the attic exposed, with a window open, and the AC running all day long. This caused one of the ducts, which lacked insulation, to sweat and drop all the ...
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Home condensation pump emptying into sewage pipe. Is this functionally okay?
I was looking at a house and noticed they had a condensation pump for a hot water heater going directly into one of the houses sewage pipes, which empties into the property's septic tank. See images ...
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Should this pipe have condensation inside of it?
Just wondering if it’s normal for some condensation buildup inside this pipe on my HVAC unit. It doesn’t appear at this time that there is enough condensation to drip down onto the electrical ...
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Basement moisture: condensation or leak? [closed]
I have a significant amount of moisture built up in our unfinished basement that’s originating from the well water pump.
I’m trying to decide if it’s even possible that the moisture could be a slow ...
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Why is my AC smelling bad and producing no condensation water?
I have a 10-year Carrier unit. It has two issues.
The AC smells musty when turned on. It smells even worse when I turn on the fan mode after running AC. No smell when running on heat. It's similar to ...
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Moisture in bay window bench seat
I live in a 1940s house with uninsulated double brick wythe exterior walls. The interior wythe has some kind of masonry skim coat. The front wall of the house has a bay window. Last spring, I built a ...
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Is primary/secondary system the right setup for condensing boiler?
Recently we've just installed Lochinvar NKC199N by a local contractor here, using liquid propane. Since this is a condensing combi-boiler, I understand that it will be running up to 95% efficient when ...
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Why does my boiler inlet pull hot water from the outlet?
Last month we installed a Lochinvar NKC199N, using LP Gas. Attached is a picture here for the reference. We have 4 zones, but let's forget about the other 3 zones as I am having issue with one zone ...
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Condensing boiler outlet temperature for floor radiant
We've just installed a new Condensing Combi boiler last week, Lochinvar NKC199N. I've noticed the installer set the outlet temperature to 180F/82C and the return temperature to inlet is somewhere ...
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Closing a skylight with gypsum board
We have a fixed skylight in the point of the house where we have stairs and this continues to an office that we have. Therefore the office is in an open space with the stairs and the skylight. This is ...
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Insulation boards with foil facing outside - condensation issues?
AFAIK the best-practice for applying insulation+vapour barrier in cold climates is:
inside -> inside wall -> vapour barrior -> insulation -> outside wall (exposed to the elements).
If you ...
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Newly installed heat pump system - Air Handler condensate leaking out of ceiling
I recently had my a/c system replaced with a heat pump system (Less than 2 weeks ago).
The original was a 2.5-ton a/c. The new system is a 3-ton heat pump. I'm now having all sorts of drainage issues ...
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Steam in bathroom
My bathroom originally vented into the attic instead of outside. I didn't have too much steam with this. A 3 inch vent was put on and exhausted out through the soffit. It wasn't effective. A new fan ...
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Question: Condensation - Insulation and a 130 year old double boarded house
I own a house that was built around 1890 to 1910 located in central Pennsylvania. It is a double boarded house meaning that it has no framing at all, it is a unique type of construction that was used ...
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Will indoor moisture be a problem with an externally-insulated shipping container?
I'm watching this video by Belinda Carr where she advocates for insulating the outside of the shipping container. She contrasts shipping containers with conventional framed houses. This seems counter-...
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Heating cable combats condensation on sill of poorly insulated window?
At the start of the year (2021), it was suggested to me on another forum that heating tape might stave off formation of condensation on the bottom metal sill of a poorly insulated window. It is a ...
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What are best practices to cool down a house without condensation?
I have a vacation house that I visit a few weeks a year, which faces a condensation issue.
Indeed, when I stay there in winter, where the outside temperature is well below freezing, I measure around ...
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Supply duct still condensating in basement
Thought i'd start a new question to see if I can get any new ideas. Overview:
E. PA location. 2 year old new construction home, approx 1200 sq ft, open concept first floor (so all supply and returns ...
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Central Air condensate is pumped into a hole in the basement floor?
I’ve tried to do some research on this topic but am a little confused and would like to know if I’ve got a problem here that I need to remedy.
I think I want to install a self-draining dehumidifier in ...
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B-vent condensation in large attic space
I have condensation in/on the B'vent flue pipe from my heater in the attic andit is dripping. The original B-vent flue pipe was corroded on the interior so we had the flue pipe replaced from the ...
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Why does water accumulate on the hardwood floors in my 1930 home?
My home was build 1930 and nothing has been updated. In my downstairs bedroom under anything that sits on the floor from my bed, night stands, dog crate, and other things the floors will puddle with ...
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How to fix capillary action on anti-condensation coating on box profile steel roofing sheets?
We have some carports here that were installed by a previous owner a few years ago. They have side walls, but are open front and back, and have a steel box profile roof. Big green sheets like this:
...
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Does mold in a loggia means that the loggia must be replaced?
My apartment has a loggia which used to be a balcony (it is now an extension of the living room without any separation between them - the door that was there was removed). This was done by the ...
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Upper Floor Window Condensation Issues - HRV?
We live in a 2 level home with basement in central washington. The winters average 20-36 degrees Fahrenheit with humidity levels of 70-99%. Summers are fairly warm to hot with lower RH.
Our issue is ...