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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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What could cause moisture on my bonus room floor?

Last week during a cold snap with high winds. I discovered moisture along the floor on one side of my bonus room, above the attached garage. Their was enough moisture that the baseboard molding ...
Todd's user avatar
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2 votes
0 answers
352 views

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 ...
greatman's user avatar
2 votes
0 answers
133 views

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 ...
Patrick Erley's user avatar
2 votes
0 answers
143 views

Trane HVAC in horizontal position - why does evaporator throw condensation?

I appreciate assistance from anyone who has had or understands the problem. I have a Trane HVAC system in a horizontal "left" flow configuration in the attic. Ambient temperature is about 95 ...
Oliver Williams's user avatar
2 votes
0 answers
380 views

How can I prevent my condensation tubing from freezing outside?

I apologize if I missed the answer for this. My plastic condensation drain tube froze outside and the water in my condesation pump could not drain correctly. I hardly touched the tube and it snapped ...
Jackie's user avatar
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1 vote
1 answer
100 views

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 ...
Vincent Huynh's user avatar
1 vote
0 answers
74 views

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 ...
Rafa's user avatar
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1 vote
1 answer
307 views

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 ...
Vetl's user avatar
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1 vote
0 answers
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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 ...
BlueSky2010's user avatar
1 vote
0 answers
92 views

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 ...
AWGIS's user avatar
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0 answers
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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 ...
ysok's user avatar
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1 vote
0 answers
533 views

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 ...
ysok's user avatar
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1 vote
0 answers
31 views

Bathroom condensation

My bathroom is mouldy and retains condensation on walls, windows etc. The room is approx 8fx7ft x 8ft high. I’ve installed a new inline Manrose fan with timer to replace cheap old online fan, the ...
Mark McB's user avatar
1 vote
0 answers
710 views

Where did the water under my basement floor come from?

I have just bought a house that had a continuous engineered oak flooring downstairs. There was an obvious buckle in the floor in the hall, at the centre of the house that we were told by surveyor/...
pingu's user avatar
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1 vote
0 answers
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Proper method to seal a heated crawl space

I have a heated crawlspace with a dirt floor. There are no vents, it is fully connected to the house, and currently has a pool liner and vapour barrier stretched over it, but it is not sealed. There ...
Tom's user avatar
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0 votes
1 answer
38 views

Condensation on spray foam in basement

I am in the progress of having a home built and we are presently at drywall stage so humidity is fairly high in the house. Our 6’ concrete crawl space will be heated. We have two construction heaters ...
Dave's user avatar
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0 answers
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Adding insulation to a loft conversion & condensation build up concerns

I just moved into a property and I want to get some insulation added to the existing loft conversion as it gets mighty cold up there. I've had a look via the eaves and there is about 8-10cm of space ...
Alex Fox's user avatar
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0 answers
114 views

What is causing water collection on inside of concrete ceiling

This is a picture from the inside of a 1970's concrete build house in the UK; as far as I can tell there is no cavity wall (definitely no insulation) so that both walls and ceiling are exterior facing ...
nox's user avatar
  • 111
0 votes
0 answers
55 views

Why do we have condensation and temperature drop around prefab fireplace?

We moved to a house with a wood burning prefab (or zero clearance) fireplace that was installed when the house was built (1986). It is in a corner in our living room, diagonal to an exterior wall and ...
Daltoniana's user avatar
0 votes
2 answers
75 views

Need help unclogging condensate drain for furnace

https://imgur.com/a/Ov8bRGq Bryant furnace model: 912SC48060S17 We have sever weather here in Portland, OR and my Bryant/Carrier furnace is blowing cold air with status code 31. Replaced filter ...
javanoob's user avatar
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0 answers
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Condensation and potential mold on inside of arch window

It's a single pane window and the condensation is on the inside of the window. Also, should I cut out what appears to be mold on the wood trim?
homeimprovementjohn's user avatar
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0 answers
31 views

how to handle steam/condensation from baseboard steam radiator

The baseboard steam radiator we had installed in 2016 as part of a kitchen renovation often causes water to pool on the (hardwood) floor because steam/condensation from the outlet doesn't seem to have ...
newton10471's user avatar
0 votes
0 answers
61 views

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 ...
Logan McNulty's user avatar
0 votes
0 answers
23 views

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 ...
Elisa's user avatar
  • 1
0 votes
0 answers
141 views

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 ...
Breedly's user avatar
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0 votes
0 answers
100 views

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 ...
tipsytopsy's user avatar
0 votes
0 answers
120 views

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 ...
Jon Griffith's user avatar
0 votes
0 answers
2k views

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,...
L. Johnson's user avatar
0 votes
0 answers
243 views

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 ...
Matt4101's user avatar
0 votes
0 answers
121 views

Sheetrock on Walls Is Falling Apart and Cannot Find the Cause

In the corner of my bedroom i have discovered that the sheetrock on each wall was so damp that it is falling apart. One wall backs up to my shower the other wall backs up to the laundry room further ...
Shelley Miller's user avatar
0 votes
0 answers
314 views

Condensation and air leak from skylight

I Recently started seeing condensation on my skylight. Skylight is installed in the bathroom. Sometime on windy day I feel air coming through skylight. If I raise my hand up towards it I can feel ...
Mayur's user avatar
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0 votes
0 answers
289 views

interior french drain installed causing wall to be wet due to condensation?

I had an interior french drain installed and I have water condensing on the durawall panel that is installed against the wall above the trench. The durawall panel runs about 2 feet above floor level. ...
Mike Ruby's user avatar
0 votes
0 answers
62 views

A/C split unit inverter leaking. What can I do?

For some unknown reason, my 12,000 BTU split unit inverter is leaking in two places. Here are the pictures of the leaks. The A/C was thoroughly cleaned last week, and the contractor said that the A/C ...
rbhat's user avatar
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0 votes
0 answers
444 views

How do I ensure my rafters are safe from condensation behind the insulation?

I am undertaking a loft conversion currently and am soon wanting to put insulation at rafter level. I have chosen 'Superquilt' (a aluminium, fibre composite layer) and PIR backed plasterboard (23mm ...
user64383's user avatar
-1 votes
1 answer
110 views

Cast Iron Sewage Vent Pipe Condensation Freezing Problem

this winter I noticed condensation freezing on my sewage vent pipe. I know I'll need to remediate the area after the fix. Any recommendations or experience with this type of problem? For context if ...
Newguyoldhome's user avatar
-1 votes
1 answer
73 views

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 ...
Qiuzman's user avatar
  • 651
-1 votes
1 answer
497 views

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: ...
Codemonkey's user avatar
-1 votes
1 answer
93 views

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 ...
WoJ's user avatar
  • 395
-1 votes
1 answer
812 views

How to ventilate a chimney taken down to attic (roof line) level?

I had a leak in my chimney flashing, so the roofer recommended taking the chimney down to attic level. He repaired the roof where the chimney was (board, felt and roof tiles). All was good, but a few ...
FSD's user avatar
  • 1
-1 votes
1 answer
2k views

Is a peltier-based dehumidifier a good choice to prevent condensation?

I have a non-heated, enclosed space (crawl space that does have a vapor barrier). During a limited number of days in the spring or fall, I get condensation on things that stay cold while the air ...
Dale's user avatar
  • 332