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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
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Title: Characterization of Moisture Performance of Energy-Efficient Light-Frame Wood Wall Systems

Source: USDA Forest Service, Forest Products Laboratory, Madison, Wisconsin, Research In Progress FPL-RIP-4716-012

Author(s): Forest Products Laboratory

Publication Year: 2013  View PDF »

Related Publications: view

Category: Research In Progress

Abstract: Recent changes in the minimum energy codes (2012 IECC) resulted in increased wall insulation and reduced wall air leakage. The long-term moisture performance of these wall systems is not well understood with regard to (1) accumulation of condensed water and (2) drying potential for water accumulated from condensation or rain events. With moisture performance an increasingly important design consideration in selection of wall systems, home builders and designers need practical guidance for construction of walls that ensure durability of wood buildings. This type of design guidance is particularly needed as various industry groups are advocating specific wall design solutions based on incomplete information.

This project involves monitoring the moisture performance of six energy-efficient wall configurations (R-19 or higher), with the study variables including 2x6 framing, exterior rigid foam, weather resistive barrier, and interior vapor retarder. In addition, six 2x4 wood-frame wall systems with various cladding materials (including cedar siding, stucco, manufactured stone, vinyl siding, brick, and fiber cement siding) are being monitored.

Keywords: moisture performance, light-frame, wall systems, energy efficiency

File size: 272 kb(s)

Date posted: 06/28/2013

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