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How to
Prevent Dust Streaks on Ceilings
Why
Dust Streaks on Ceilings and Upper Walls Occur
By Mark J. Donovan
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Dust streaks on ceilings and upper
walls is a fairly common phenomenon. Cathedral ceilings are often more prone to
this type of problem then flat ceilings, and most particularly at the outside
wall edges. The dust pattern often has a scalloped type look where the ceiling
intersects the exterior walls.
Wall and ceiling dust streaks occur due to insufficient insulation in the attic
area of the home. Due to inadequate insulation in the attic, the ceiling and
upper wall surface temperatures are much cooler than the air and wall surfaces
near the lower levels of a room.
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When warm moist air rises from the
radiators or hot air registers, the moisture in the warm air condenses and forms
microscopic water droplets on the ceiling and upper walls where the surface
temperatures are much colder. In addition to the warm air rising, small
particles of dust also get lifted upwards towards the ceilings.
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As the
dust comes in contact with the cold moist surfaces
of the ceiling and walls, it sticks to them. As the
dust builds up on the ceiling and upper wall
surfaces, over time slightly shadowed or dark
looking areas form.
Consequently the only way to really prevent dust
streaks on ceilings and walls from occurring is to
install enough insulation in the attic and walls so
that they do not become cold. If they are prevented
from becoming cold, the warm moist air will not
condense on them and cause dust to stick to them.
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To remove dust streaks on ceilings and walls the best solution is to repaint the
surfaces after first washing off the dust with warm water and a detergent. In
some cases, you may be able to forgo the repainting, but in most cases it’s the
only true way to permanently mask the shadowed dust streaked ceiling stains.
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