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Why is like this Inside Attic having lot of Moisturization Water on Top of Insulation in Winter

Hi guys, I am having problem in Attic,

1)--I mean Inside Attic having lot of Moisturization Water on Top of Insulation in Winter time, when I move Insulation all Dry in bottom, only Top of insulation this Moisturization Water is there.
Is there any body know from there this water is growing in Attic.
And there is no leak from the Roof also.

2)--This is Town House attach other House on both sides, and on Top Floor Room on both side Ceiling there is Fungus/Mold is growing in Winter time only, so we go inside Attic to look on both Corners, there is no Water at all, only the thing I notice that place is very Cold. And from inside I feel that both Left side & Right side Corners are very cold, because of that Fungus/Mold is growing on both Corners.

Please let know what solution I have to apply on Ceiling Dry Wall on both Corners, to not grow Fungus & Mold.

Thanks

Comments

  • kcopp
    kcopp Member Posts: 4,462
    Frost melting on the underside of the sheathing... then drips onto the insulation when it warms up.

    That is warm moist air working its way up through your house into the attic.




  • Larry Weingarten
    Larry Weingarten Member Posts: 3,481
    Hi, I agree with @kcopp , so the fix is air sealing the attic floor. This means pulling the insulation back and caulking or otherwise sealing any air leaks you find, particularly at the tops of the walls. The surest way to find leaks is to depressurize the house with a blower door and use a smoke gun or incense stick to find the leaks. The big leaks are easy to find around any pipes, wires, and flues or chimneys.

    Yours, Larry
  • Mosherd1
    Mosherd1 Member Posts: 70
    Do your bathroom exhaust fans vent outside, or are they just stuck up into the attic. Up until a few years ago around here, bath fans were just vented into the attic with the assumption there was enough ventilation up there to dissipate the moisture.  You might also not have enough attic vents, both soffit intake vents and exhaust vents down the ridge.
    ZmanHomerJSmith
  • tester22
    tester22 Member Posts: 50
    yes there is a Washroom on this Top Floor and the Exhaust Fan directly Vent out through Vent Pipe to Roof it is connected, so the Air get out from the Roof.
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 8,494
    I had my attic ceiling insulated with spray foam. This made the attic warmer in the winter and much cooler in the summer. The foam sealed all the tiny openings making the attic part of the enclosed conditioned space and eliminated moisture problems. This was done in 2012. When I moved out in 2020, there were no signs of moisture damage in the attic.

    That may be one way to solve the problem.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

    ethicalpaul
  • Jamie Hall
    Jamie Hall Member Posts: 24,069
    Personally I prefer @EBEBRATT-Ed ;s approach. It is almost impossible to seal all the air leaks from the occupied part of the house without using spray foam. If you have fiberglass on the attic floor, you also need lots of ventilation in the attic or you will have exactly the problem you mention -- and probably a mold problem on the underside of the roof to add to the fun.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,046
    You need to do both. Insulate and seal the attic floor and add vents to the attic. The attic should be as cold as the outdoors.
    ethicalpaul
  • tester22
    tester22 Member Posts: 50


    Here are the Photos of Attic & Construction time photos also there.
    And yes there is a Washroom on this Top Floor and the Exhaust Fan directly Vent out through Vent Pipe to Roof it is connected, so the Air get out from the Roof.
  • tester22
    tester22 Member Posts: 50







  • tester22
    tester22 Member Posts: 50
    I have another problem in my Home around the Windows on mirrors lot of Moistorization Water occupying, so all water leak on the Base, and I clean every day 10 time per Window, and around the Windows Fungus growing, so I clean ever day water.
    So what cause this Windows releasing water problem in my Home. This problem I face in Winter time only.
  • pecmsg
    pecmsg Member Posts: 5,094
    The interior RH is Too High!
    WMno57
  • jesmed1
    jesmed1 Member Posts: 575
    edited January 2
    tester22 said:

    I have another problem in my Home around the Windows on mirrors lot of Moistorization Water occupying, so all water leak on the Base, and I clean every day 10 time per Window, and around the Windows Fungus growing, so I clean ever day water.
    So what cause this Windows releasing water problem in my Home. This problem I face in Winter time only.

    If you're wiping condensate off your windows 10 times per day, you have a serious problem. Either you are producing too much moisture inside the house (by running a humidifier, for examples), or the house envelope is too airtight, or a combination of both. You need to find out where all the moisture is coming from and stop the source, or you could end up with a serious mold problem inside the house.

    If you can't find where the moisture is coming from, try installing a dehumidifier.
  • Larry Weingarten
    Larry Weingarten Member Posts: 3,481
    edited January 2
    Hi, Is there a crawl space under your house? If so, have a look down there and see if there is any water or moist dirt. The water is coming from somewhere. ☔️

    Yours, Larry
    Ps. Also, have a look at your water meter. Is there any motion on the dial when no water is being used?
    EdTheHeaterMan
  • Teemok
    Teemok Member, Email Confirmation Posts: 658
    If it turns out you don't have a roof leak or an improperly terminated bath vent fan or stove hood fan venting in the attic, etc. Water vapor condenses when it's temperature drops below the dew point. Sheetrock and insulation is water permeable. If you have high humidity in the living space the moisture will migrate though the ceiling materials and will condense into water where it cools. Most of the time this happens on the underside of the roof sheathing in a poorly vented attic. In your case it may be happening at the insulation top surface. A cool very humid interior and very cold attic might create the results you are reporting. Lots of: breathing people, cooking, showers, plants or leaks, a wet slab, wet soil in the crawl space. The water is coming from somewhere!
    EdTheHeaterMan
  • bburd
    bburd Member Posts: 956
    edited January 2
    Gas fired appliances that are not properly vented can add a lot of moisture to the interior of a home. If you have any, check the combustion exhaust vents when they are running.

    Bburd
    jesmed1
  • WMno57
    WMno57 Member Posts: 1,408
    Another thing that can cause high indoor humidity:
    Clothes dryer vent leaking humid air to inside of home.