What is this behind my Sheetrock?

Discussion in 'Bricks, Masonry and Concrete' started by mark price, Jun 14, 2018.

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  1. Jun 14, 2018 #1

    mark price

    mark price

    mark price

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    Can anyone tell me what this yellow substance is behind my basement sheet rock beneath the stairs , as well as the vein like strands in the second photo?

    upload_2018-6-13_20-20-57.jpeg

    upload_2018-6-13_20-21-36.jpeg
     
  2. Jun 14, 2018 #2

    Snoonyb

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    Welcome.
    I do not see any yellow or any streaks.
    An expanded panorama and description of the area would be of assistance.
     
    bud16415 likes this.
  3. Jun 14, 2018 #3

    mark price

    mark price

    mark price

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    Thanks.

    The yellow substance is under the the pipe (below is a clear image that appeared on the other side of the stair) and the strands are next to the rock in the second photo (will try to provide clearer images this evening).

    upload_2018-6-14_9-10-1.jpeg
     
  4. Jun 14, 2018 #4

    havasu

    havasu

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    Mold?
     
  5. Jun 14, 2018 #5

    bud16415

    bud16415

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    Looks like mold to me also. We have a field stone basement and I get stuff like that. Try spraying some Clorox on a spot and see what happens.
     
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  6. Jun 22, 2018 #6

    stuart45

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  7. Jun 22, 2018 #7

    tuffy

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    After looking at Stuart45's photo's I vote for dry rot.Had the yellow and the veining.So I guess spray it with some bleach and if it goes away I was wrong wont be the first time and wont be the last.:dunno:
     
    Last edited: Jun 22, 2018
  8. Jun 22, 2018 #8

    nealtw

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    B
    Bleach is a great disinfectant for hard surfaces like counter tops, there are products for killing mold and rot and it is not bleach on a pores surface.
     
  9. Jun 22, 2018 #9

    slownsteady

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    Bleach loses it's effectiveness at the surface, but in this case it should be a good test to see if the surface mold responds. It won't solve the problem but it will help determine the problem. You may find the best solution is to remove/replace the sheetrock/drywall.
     
  10. Jun 22, 2018 #10

    nealtw

    nealtw

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    It is any number of things you would not expect to grow on concrete but they all will feed on the dust and moisture on the concrete.
    So where is the moisture coming from if it is coming thru the wall, should be stopped before replacing drywall. If it is just warm air moist air with water condensing against the concrete you need insulation and vapour barrier between that room and the concrete.
     
  11. Jun 22, 2018 #11

    tuffy

    tuffy

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    :cry:Told you I would be wrong again (didn't think it would be this quick tho)
     
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  12. Jun 22, 2018 #12

    nealtw

    nealtw

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    You are not alone with that one, you can find bleach suggested all over the interweb.
     

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