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Causes of Mildew In Carpets
Mildew gets its food from the root system which works its way into the
material on which it is growing. Mildew can only get its food from
natural materials such as protein, cellulose, etc. In a carpet the
protein material would be wool, the cellulosic would be jute or cotton.
If a carpet is used where mildew growing conditions are present then
all man-made fibers (both face and back) should be used. The
possibility of mildew growing on this type of carpet is very small and,
even if it does, it will not damage the carpet.
The damage mildew can produce is twofold. The root system can remove as
much as 90% of a natural fiber's strength in two weeks. After the
mildew growth has taken place and the fibers dried out, a crackling
sound can be produced if the rug is rolled. The crackling sound is the
result of the crush of the hollowed backing fibers. If the mildew
growth was in the backing fibers, the rug may have little strength and
can easily be pulled into or may even fall apart if an attempt is made
to move the rug. If damage this severe has taken place, then nothing
can be done to correct it other than cutting out the damaged area.
Mildew can also leave a discoloration inside the fibers which is almost
impossible to remove. The color will vary depending upon the type of
mildew from white to black, reds, browns and greens.
If it is neither possible nor practical to prevent mildew growth, the
carpet may have to replaced with one made from all man-made fibers.
The construction of many homes with the family or recreation room below
ground produces ideal conditions for mildew growth. An unsealed
concrete slab will allow moisture to pass from the ground into
the room. If a carpet is to be installed, three steps should be taken.
First, seal the concrete. Sealers can be obtained from hardware and
paint stores and can be applied with a paint brush. Install only a
carpet or rug with all man- made fibers, both face and back. If
moisture and mildew are still a problem, use a dehumidifier.
This article was written by Anne Field, Extension
Specialist, Emeritus, with reference from The Carpet and Rug Institute - Mildew.
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