Masonry Magazine July 2011 Page. 17
MASONRY COMPUTER ESTIMATING
Masonry Computer Estimating
That Does It All... in 3D!
by TRADESMEN'S SOFTWARE
The two most common sources of moisture that impact below-grade construction are infiltrating moisture (in liquid form entering through walls or floors) and condensing moisture (in vapor form being deposited on the interior surfaces of the basement walls and floors to create water droplets). Two very different concepts in the realm of the laws of physics, but in many cases, absolutely connected in the realm of wet and dry basements. The factor that joins them is temperature.
Moisture (water in the fill that surrounds below-grade construction) can impact this construction detail in many ways. There are two that are most relevant to this discussion. First, moisture can pressurize against the surfaces of below-grade construction and force its way through voids in this construction detail creating "leaks." Second, moisture, because of its molecular density, can transmit temperatures 25 times more efficiently than air to the exterior surface of the below-grade construction to potentially create a dew point temperature on the interior surface of the below-grade construction creating the possibility of condensation.
It's back to the old rules of moisture management: Keep moisture away from and off of construction details, and get it
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READER SERVICE #163
July 2011
MASONRY 15