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Moisture issue: Foundation is wet; drain
gutters are too short. Fix: Drain rain water away from the house, generally
about 5 feet away from the foundation. Gutters below grade (below the soil)
are protected from damage, while those above grade may be more easily damaged.
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Moisture issue: Rainwater is falling and
collecting near the foundation of this house. Fix: It is important that
the water drain away from the foundation—the ground could be sloped
away from the foundation so that the water will run off. |
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Moisture issue: Disconnected downspout
deposits rainwater from roof onto walls and near foundation. Fix: Connect
the 2 downspouts. |
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Moisture Issue: A lawn sprinkler is located
near the outside wall of a building; the sprinkler sprays the wall directly,
and water leaks through wall into the building. Fix: Move the sprinkler
away from the building so that water does not wet the walls or collect near
the foundation. |
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Moisture Issue: Foundation was chronically
wet, water and mold damage was found on original structure. Fix: Area
was regraded during construction of an addition so that water drains away
from the foundation. |
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An example of window flashing, applied
so that water drains to the outside of the window and not into the surrounding
frame or walls. |
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Rust is an indication that condensation
occurs on this drainpipe. The pipe should be insulated to prevent condensation. |
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Moisture issue: Condensation on uninsulated
air conditioning duct. Fix: Insulate the duct on the outside. |
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Moisture issue: Leaking pipes. The
leaking pipes under the kitchen sink were taped; the pipes continued to
leak, and the area got moldy. Fix: The pipes should be fixed by a plumber
or other qualified professional. |
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Example of a crawlspace without mold or
water problems. The site is well drained. The crawlspace has a vapor
barrier over the earth, is air-sealed, and insulated on the walls. |
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Two examples of dehumidifiers. For
spaces that are damp, often at high humidity, but do not have liquid water
running through them, a dehumidifier can be used to reduce humidity. |
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Example of a drain pan beneath a
cooling coil that slopes to a drain line and is constructed of stainless
steel. |
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Example of exhaust vent in a bathroom. |
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Example of an exhaust hood and fan over
a stovetop in a kitchen. An exhaust fan over a range draws heat, moisture,
and contaminants out of the house. Range hoods should vent to the outside.
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Mold (and dirt) beneath refrigerator due
to chronic drip-pan overflows. |
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Mold on a vacuum cleaner stored in a damp
basement. |
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Moisture meter and moldy roof sheathing. |
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Measuring moisture levels of a subfloor. |
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Moldy bedroom closet. Water condensed
from the air onto the gypsum board. The wall is cool enough for condensation
because there is a hole in the insulation and it is cold outdoors. |
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Moisture meter, showing high moisture
content in gypsum board behind tile. |
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Mold growth under ceramic tiles in a bathroom.
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Mushrooms growing at the base of and behind
the baseboard below a water leak in a bathroom. The baseboard has been
removed; the puckers in the paint are due to water damage. |
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Most mold is found by simply looking.
Mold beneath corkboard. |
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Mold inside a wall. This photo shows
an interior wall with the lower portion of the drywall removed on one side;
there is mold on the backside of the drywall caused by water leak. |
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Opening a wall with a utility knife to
minimize disturbance to mold in the wall cavity. |
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Inside of wall from above, moldy gypsum
board, insulation. |
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Looking for mold in wall cavities by removing
a section of drywall. |
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Clear plastic tape is used to collect
a sample. The sample is analyzed with a microscope to determine whether
the substance is mold or soot. |
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Bulk samples can be examined using reflective
light microscopes, such as stereo microscopes or this epi microscope.
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N-95 disposable respirator. |
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Cleaning with Personal Protective Equipment
(PPE) - gloves, goggles, N-95 respirator. |
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Limited PPE. |
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Full containment on a large job. |
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Full containment. |
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Full containment. |
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Drying a carpet with a commercial specialty
blower with built-in heater. |
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HEPA vacuum. Care is being taken to
disturb the mold as little as possible while vacuuming. |
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Damp wiping surfaces with water and a
small amount of detergent. |
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Bookcases and books protected during clean-up.
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