| Conceptual Reference Database for Building Envelope Research |
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| Essay:construction moisture as cause of initial moisture trapped in wallMositure can be stored in the building envelope components during the construction process. The wood studs can be wet during the construction, and not dry before the vapor barrier and exterior sheathing in place. Weather (rain, fog, snow, dew, etc) can add more water to the components.
One of the most important humidity sources is the remaining water from the construction phas - construction humidity- and the water that remains from ad weather conditions during the buidling construction period. Therefore, buildins present great amounts of water which may lead, during the first months, to high relative humidity quantities. In improving the building envelope, the altered outside moldings decrease vapor permeability, if inside of wall, air leakage, room ventilation is not improved, it can cause moisture built-up in walls
when we choose best outside moldings, without introducing ventilation systems, we will have a significant inside air renovation rate reduction.
"Moisture can also enter your home during the construction process. The building materials can get wet during construction due to rain, dew, or by lying on the damp ground. Concrete walls and foundations release water steadily as they continue to cure during the first year after a home is built. During the house's first winter, this construction moisture may be released into the building at a rate of more than two gallons per day, and during the second winter at a slower rate of about one gallon per day." -- http://www.ornl.gov/sci/roofs+walls/insulation/ins_18.html
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