Building Science - Moisture
Movement
"Building scientists
have learned that buildings work as a system of interrelated
elements."
—EPA,
Montana State University, USDA
Building Sciences is the study of how buildings
function under various environmental conditions. Some of the
key elements are moisture movement, relative
humidity, pressurization, air
leakage, temperature and
the building envelope itself.
Moisture Movement
Moisture problems are the number one source
of residential concerns. Excess moisture generated within the
home needs to be removed before high humidity levels lead to
physical damage to the home or mold growth. The ideal interior
relative humidity levels to maintain on a seasonal basis would
be 40% - 50%RH. The key to controlling relative humidity levels
in a home is to maintain a moisture balance. Too much moisture
can cause problems, but some moisture in the air is necessary
for human health and comfort.
Ultimately, structure, ventilation and filtration
all influence the performance of the entire system. Indoor air
quality can be greatly improved by using the proper design strategy
and good building materials. Mechanical systems should be designed
and installed by trained experts aimed toward protecting the
health, quality of life and productivity of the building occupants.
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