Questions tagged [condensation]

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1answer
27 views

Type of insulation for flexible aluminum duct?

I’m replacing an undersized bathroom exhaust fan with a larger one that has a higher CFM. When switching the fan out, I want to add insulation to the flexible aluminum duct that goes from the fan to ...
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1answer
21 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 ...
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1answer
21 views

Who can I hire to investigate a possible airflow blockage in my attic?

Had a new roof replaced last year, tear off/replace. Also had a new slider door replacing old one installed last year. I am noticing what appears to be staining where the ceiling meets the wall. ...
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1answer
98 views

Is this an acceptable way to fix garage roof condensation?

I'm in the UK. My garage has a corrugated metal roof with no insulation. In the winter, when it rains the underside of the roof drips. Not massively, but just enough to be annoying. The roof ...
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1answer
34 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 ...
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20 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 ...
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2answers
83 views

I have an indoor swimming pool - can I have a large mirror, or will it be steamed all the time?

I have a dehumidifier in my indoor swimming pool room, I would like a large dance mirror on the wall - would it be constantly covered in condensation. My room humidity is controlled to 50%. Just don’...
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1answer
83 views

Water leaking around window when it is NOT raining!

I need help! In February, we noticed that there were some brown water drips on the window frame above our kitchen sink, not in a crevice or corner, just hanging from the middle of the wood frame! ...
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2answers
34 views

Solution to put down a window sill crack to prevent mold

I have a couple windows where there is a space below the window that goes into the wall (see bottom of picture). There was mold and condensation all around the area, so I'm guessing there's mold down ...
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1answer
73 views

Finishing drywall that abuts against metal frame prone to condensation

I have a interior soffit (that encloses a structural beam running along the exterior of the building) directly above an exterior sliding door. The drywall covering this soffit abuts right up against ...
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1answer
97 views

High humidity in bedroom and condensation

I have a Bungalow build 1950s cavity walls not sure if they have insulation in the cavity. Suffering from really high humidity in main bedroom 74% overnight dropping to 59/60 in day. Window and ...
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1answer
516 views

Why is there a 1/2-inch hole drilled in my heater exhaust?

I have a Carrier high efficiency furnace which uses 2-inch PVC pipes to pull in combustion air from outside and exhaust the combustion gasses back outside (through a concentric vent, but that's not ...
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2answers
74 views

Water is dripping from the furnace exaust flue

I replaced my hvac and noticed that my flue is dripping water. Wondering what might cause it? I assume some sort of condensation, but I don’t know what should I do to fix it.
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1answer
53 views

Condensation on Skylight

So this is my first winter in my new house and I noticed the skylight on the second floor has a lot of condensation on the inside now that the weather is getting colder. It's an old single pane and ...
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0answers
46 views

Is it proper to install a ceiling vent for HVAC if it blows on the windows in the “open” position, but not in the “closed” position?

I understand that HVAC vents should be aimed at the windows (ceiling and floor vents) to maintain the target ambient temperature and avoid extremes in a room. In the case of a residence in a humid ...
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3answers
92 views

What could be the sources of humidity that build up in a house in an arid environment? Outside RH: 10%; Inside RH: 40% +

We open our window at night at the temps get down to 70F @20% RH. The temp in the house drops to 75F and the RH is 33%. We close our windows when we go to work. When mid day comes, outside, the ...
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1answer
115 views

Preventing condensation on the inside of an exposed structural exterior brick wall

I have a 1920's town home with exterior brick walls. In the upstairs bedroom on the northwest corner, I occasionally see condensation forming and running down the brick wall in the winter. This is ...
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1answer
309 views

Should I open my AC register in the basement to help with condensation?

Really hot in NJ this week, excessive heat warnings, and the like. Daytime Temp: 96 degrees Daytime Humidity: 55% Feels Like: 105 degrees Nighttime Temp: 79 degrees Nighttime Humidity: 87% ...
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3answers
79 views

Improve existing roof insulation from the inside

We have a pitched roof (1971 house, The Netherlands) which consists of (outside to inside): Tiles 2cm PUR insulation 2cm wood We asked a few companies for quotations to improve the insulation (...
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0answers
20 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 ...
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1answer
55 views

Could my furnace be leaking due to condensation neutralizer?

I posted this and the main suspect was condensation pump but after troubleshooting, the pump is working fine (tested standalone). Now I wonder if the leak could be due to the condensation neutralizer; ...
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1answer
40 views

Toilet tank dripping water condensation [duplicate]

I have a toilet which has water condensing on the outside of the tank and then dripping down onto the floor. No, the tank is definitely not leaking. This is weather related, as this always happens ...
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3answers
576 views

How can window condensation in a leased condo be dried, if I'll be away for 3 weeks, without towels?

I will be leaving my leased condominium in Toronto, Canada for three weeks on 1 Feb. 2019. In cold weather, my window and balcony door sills have pools of water on the floor that sometimes pour into ...
2
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1answer
56 views

How can I deal with a heat pump condenser producing lots of water?

Heat pumps was replaced in 2017. North Florida has had moderately cool weather (50-60 degrees F) recently. I noticed water underneath one of the units. Is the water pooling normal? If yes, why? If ...
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1answer
27 views

Can improved window insulation prevent condensation on the interior of a window

We have a whole house humidifier which is great but one of our windows condenses much more than the others and doesn't dry out because it doesn't get much sun during the day like our other windows. I ...
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2answers
77 views

How can I identify the cause of ceiling water damage?

Just wondering if there is an easy way to tell if water damage on the celing is a result of a roof leak, or condensation build up in the house. Here are some pictures: https://photos.app.goo.gl/...
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2answers
140 views

What is causing these water “trails” on inside of exterior wall?

The bedroom at the back of my house (North facing) has what I would describe as persistent water "trails" on the inside surface. They are faint, but noticeable. The "trails" run from the ceiling, and ...
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2answers
2k views

How to deal with bedroom condensation/moisture on winter mornings?

In late September when the weather started cooling down here in Surrey BC Canada, we started to see morning condensation on our windows (newly installed last year): My wife and I and our son sleep in ...
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1answer
850 views

Condensate pumps for mini-split system within attic; is this the best location?

We had a Gree mini-split system installed in our condo located in the SF Bay Area in 2016. Since the location of the 3 units (both bedrooms and living room) are not mounted on external walls, ...
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2answers
236 views

Is there some type of coating I can use to prevent condensate on my HVAC ducts?

I'm getting a lot of condensate on my HVAC ducts that run though my first floor (and HVAC blower) especially in July / August when humidity levels are outrageous (in NJ). The 1st floor space space is ...
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2answers
411 views

Problem with condensation on HVAC ducts inside house

I'm having a pretty serious problem. There is an old sheet metal HVAC duct in my home that is getting condensation that is dripping onto the ceiling of a pantry. This duct is completely internal to ...
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0answers
86 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. ...
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1answer
60 views

Carport condensation issue

Recently, my carport started to collect condensation when it's warm after a cold night. This never happened before. Carport is attached to the sun-room. The change that was made to it is enclosing ...
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1answer
54 views

what is a reasonable amount of condensate water produced by my pump?

I have a Ruud hi-efficiency furnace and also a Ruud tankless hot water system, both with condensate lines running down to the pump. My problem is... the pump runs (intermittently) ALL day long..lol.. ...
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2answers
2k views

How to fix condensation between layers of insulation in unfinished wall?

An above grade portion (wood framing) of my basement walls (in unfinished furnace room) is currently insulated with faced R19 fiberglass batts. I live in nothern climate zone 5. Unfortunately there ...
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1answer
211 views

Can I use an old refrigerator to produce water from air

I want to take apart an old bar fridge and use the components to produce potable water through condensation. My plan is to remove the condenser, evaporator and compressor from the fridge as intact ...
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2answers
1k views

Is it normal for frost to accumulate on nails in my attic?

I had a new roof installed this summer and I had trouble with my roofer (had several leaks). Now it's winter and it's been abnormally cold the last few days. When I put the Christmas decorations ...
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2answers
338 views

Condensation on window frame in basement

Freaking out here. Just had a second coat of mud put on the seams in the basement drywall. Went down to close up some of the vents because my guy is going to sand tomorrow and noticed a bunch of ...
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2answers
796 views

B-Vent Flue Condensation

We have had a water spot appear and not go away in our master bath. After looking around I found out that the flue pipe, B-Vent, is dripping with condensation when the furnace is running. I have ...
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0answers
48 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 ...
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2answers
404 views

Pipe Insulation Slit Orientation

I have insulated a 'sweaty' pipe to prevent condensation from forming and dripping on to ceiling tiles (hyperlink provides context). I have been advised that the insulation foam should have the slit ...
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2answers
4k views

Will pipe insulation stop condensation on an HVAC drain line?

ISSUE A sweaty condensation drain line is dripping and causing mold in a ceiling panel: The condensation drain pipe is lengthy and spans two rooms: QUESTION Is insulating the pipe an effective ...
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2answers
4k views

What are the brown stains showing through my white paint?

Should we be worried about these? We have some brown spots like these in the top floor, in the wall and some spots in the ceiling. Mostly around the ceiling nails like in the first picture. They are ...
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1answer
226 views

Dehumidifier with multiple float switches

I just bought a dehumidifier for my soon to be finished basement. Based on the basement layout I also got a condensate pump so I can pump up the water to drain it above the dehumidifier. The ...
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2answers
3k views

Could a sweating pipe in the attic drip water onto the ceiling?

I have a sweating pipe in my ceiling from the AC. I have changed the filter and have tried to clean the coils the best I can. The pipes have no insulation around the sweating pipe. Would this cause ...
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1answer
39 views

condensation on the glass [closed]

have been noticing condensation on my window glass each morning, but when I open my heavy curtains, the condensation will disappear. Never had this problem with my old windows. Thank you.
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3answers
144 views

How much indoor condensation is too much?

We recently bought a 1939 wooden house in California. I don't know if the windows are original but they sure aren't new. We're in a pretty mild climate, so we might get a morning frost from time to ...
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3answers
2k views

If it is important to humidify the air in winter for one's health, how then do you prevent condensation from forming on the inside of windows?

The optimum zone of the relative humidity of one's home at any given time is between 40% and 60%. This is the range to ensure that the humidity does not damage one's health or one's furnishings, in ...
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0answers
172 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 ...
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0answers
481 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/...