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Title: Moisture redistribution in full-scale wood-frame wall assemblies: measurements and engineering approximation

Source: Buildings. 10(8): 141. 25 p.

Author(s)Boardman, Charles R.; Glass, Samuel V; Zelinka, Samuel L.

Publication Year: 2020  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4716-1A

Abstract: A counter-balanced mass measurement system was constructed to allow measurement of water loss from a full-scale wood-framed wall assembly. Water was injected onto a localized area of paper towel adjacent to the oriented strand board (OSB) wall sheathing. Moisture pins in the OSB and relative humidity/temperature sensors inside the insulated wall cavity monitored conditions as the wall dried out. The wetted OSB area’s moisture content dropped at a faster rate than the total mass of the wall, indicating moisture redistribution within the wall. A simple model was used to calculate overall moisture redistribution, which was characterized using a near-exponential decay function. This simplifcation of the inherently three-dimensional physics of moisture redistribution could be incorporated into the one-dimensional hygrothermal models often used in research and engineering practice.

Keywords: Moisture performance; moisture redistribution; drying potential; building envelope; oriented strand board; mass balance

Publication Review Process: Formally Refereed

File size: 3,072 kb(s)

Date posted: 09/18/2020

This publication is also viewable on Treesearch:  view
RITS Product ID: 99151
Current FPL Scientists associated with this product (listed alphabetically)
Glass, Samuel V.
Research Physical Scientist
Zelinka, Samuel L.
Materials Research Engineer
 

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