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Trying to determine if this is mold

I have a few pictures of a basement wall that was only partially covered with drywall, and the exposed insulation has black spots on it. Trying to determine if this mold or not. I'd like to send a few pictures if someone would be willing to take a look. Thank yo u

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Put some bleach on the spots. If they turn brown or disappear, then it is mold.

Posted on Jan 05, 2014

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The wall of the daughter's bedroom is NOT insulated. Moisture from normal activities (showering and cooking) within the house are causing the realtive humidity to be above 50%. When that moisture enters the wall or ceiling, the temperature drops below the dewpoint and condenses out. The moisture that condenses makes a nice environment for the growth of black mold which is highly toxic. The mold will spread by airborne spores. If you have return air ducts for your HVAC system in the room, the spores might be dispersed throughout the entire house, depending on how good you HVAC filter is. Note that if you have a swamp cooler on the roof, it could be leaking water through the ceiling and causing the problem.

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How do I repair a large hole in my drywalled wall in my living room that is right beside the door frame?


If you live near a Home Depot or Lowes they sell partial sheets of drywall. Cut a square slightly larger than the damaged area from the new drywall. Trace this around the damaged area and then cut out the damaged area with a key hole saw or sawzaw or if you don't have those just your utility knife. You can probably buy all the tools and materials for a lot less than hiring someone. Since you said the hole is next to a door you shouldn't have to worry about electrical wires, but just in case, take a flashlight and look into the hole before you cut to make sure. Now you should have a hole the size and shape of the new piece you cut. The area against the door is against studs and you'll have to just keep cutting with your knife until you get through to the wood. Now, on the other side of the hole across from the door take a piece of scrap wood and put it inside the hole and press it against the inside of the wall so half the scrap wood is behind the wall and the other half is exposed in the hole. While you're holding the scrap wood you'll need to screw 1 1/4" drywall screws through the existing drywall and into the scrap wood. The scrap wood should now be tight against the back of the drywall and partially exposed to resemble the stud on the other side by the door jamb. Now you have backing for your patch. Place the patch you cut earlier in the hole and screw it in place. A screw gun or drill with #2 philips head screw tip will make this job easier. The screws should be counter sunk just slightly so the heads don't rip the paper. If you do rip the paper you'll need to put in another screw near that one or else you'll have problems later, especially near a door. Now finish the hole with joint compound. You can buy this at most hardware stores in a one gallon bucket. You'll need a role of drywall tape as well. I recommend the fiberglass mesh tape for ease. Also you'll need a taping 6" taping knife and a tray.
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