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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


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Durability and Wood Protection Research

Project Title :  Proper design and operation of residential and nonresidential buildings can extend the service life of the building and wood products in th
Project Number : FPL-4723-1
Start Date : 07-23-2007
End Date : 07-23-2012

View the 42 publications associated with this project.

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Principal Investigator:
Carol A. Clausen

Non Technical Summary
PhotoCurrent guidelines for moisture control are often based on limited or outdated information and inadequate performance criteria, and they are often improperly applied to a wide range of climatic conditions. New technologies and guidelines are needed which minimize the potential for moisture damage to the structure, while maintaining or improving the energy efficiency of the building and the indoor air quality for the occupants. The balance between wetting and drying of a building component determines its likelihood for decay and mold. Computer models have been developed for the wetting and drying behavior of building components, but predicting rain-water penetration and retention within a structure, and the effect of air leakage on wetting and drying needs improvement. Moisture also plays a role in corrosion of metal fasteners, particularly those that are associated with preservative-treated building components. Durability problems with the performance of wood composite building materials, such as hardboard siding and oriented strandboard sheathing have emerged. While improper installation, improper building design, or construction practices may be partially responsible for these problems, a portion of the problem may be inconsistent product quality in regard to resistance to moisture. Composites and engineered wood products being developed to conserve our wood resources often have performance properties that are inferior to solid wood.

Objectives Summary
The objectives of this problem area are to develop performance-based moisture designs for wood-frame buildings based on technical information and engineering principles, develop new methods to accurately predict the corrosion of fasteners relative to moisture and chemical exposure, develop wetting and drying strategies for building materials, and assess in-service failure rates for engineered composite products.

Approach Summary
New methods will be developed for predicting rain-water penetration and retention within a structure as well as the effect of air leakage on wetting and drying of building materials. New test methods will be developed to measure corrosion rates for metals fasteners relative to moisture and chemical exposure. Data will be compiled on actual in-service conditions to assess interactions and failure rates for various building materials.

Publications associated with this Project

Publication YearTitleDate Posted
2010A laboratory facility for research on wind-driven rain intrusion in building envelope assemblies07/15/10
2008A percolation model for electrical conduction in wood with implications for wood-water relations10/15/10
2010Advances in Corrosion Testing of Metals in Contact With Treated Wood05/16/11
2008ASHRAE Standard 160P--criteria for moisture control design analysis in buildings10/15/10
2010Case Study: Performance of a House Built on a Treated Wood Foundation System in a Cold Climate01/10/11
2011Combining hygrothermal and corrosion models to predict corrosion of metal fasteners embedded in wood10/25/11
2008Corrosion of metals in contact with treated wood : developing test methods10/15/10
2011Corrosion of metals in wood: Comparing the results of a rapid test method with long-term exposure tests across six wood treatments04/13/11
2009Corrosion Rates of Fasteners in Treated Wood Exposed to 100% Relative Humidity02/09/10
2009Decay Hazard (Scheffer) Index Values Calculated from 1971-2000 Climate Normal Data10/15/10
2009Design Tools06/06/11
2010Effect of Cladding Systems on Moisture Performance of Wood-Framed Walls in a Mixed-Humid Climate01/10/11
2007Effects of air leakage of residential buildings in mixed and cold climates10/15/10
2009Electrochemical impedance spectroscopy (EIS) as a tool for measuring corrosion of polymer-coated fasteners used in treated wood04/27/09
2007Equivalent circuit modeling of wood at 12% moisture content10/15/10
2010Estimating Foundation Water Vapor Release Using a Simple Moisture Balance and AIM-2: Case Study of a ContemporaryWood-Frame House01/10/11
2012Examination of water phase transitions in Loblolly pine and cell wall components by differential scanning calorimetry04/19/12
2010Exposure testing of fasteners in preservative treated wood: Gravimetric corrosion rates and corrosion product analyses10/20/10
2009Extreme Exposure Fenestration Installations -- The Florida Challenge06/26/09
2010From Laboratory Corrosion Tests to a Corrosion Lifetime for Wood Fasteners: Progress and Challenges06/10/11
2008Impedance spectroscopy and circuit modeling of Southern pine above 20% moisture content11/20/09
2009Improving the Performance of Painted Wood Siding: Rain Screen, End-Grain Seal, and Back Priming10/06/09
2011Insulating raised Floors in Hot, Humid Climates07/12/11
2007Measurements of moisture transport in wood-based materials under isothermal and nonisothermal conditions10/15/10
2011Measuring the Surface Area of Fasteners11/25/11
2010Moisture durability for wood products07/15/10
2009Moisture Meter Calibration for Untreated and ACQ-Treated Southern Yellow Pine Plywood04/27/09
2011Moisture Meter Calibrations for Untreated and ACQ-Treated Southern Yellow Pine Lumber and Plywood01/27/12
2007Moisture performance of a contemporary wood-frame house operated at design indoor humidity levels10/15/10
2010Moisture Performance of Insulated Raised, Wood-Frame Floors: A Study of Twelve Houses in Southern Louisiana01/23/11
2009Moisture-Related Properties of Wood and the Effects of Moisture on Wood and Wood Products02/09/10
2009Occurrence of Mold in a Two-Story Wood-Frame House Operated at Design Indoor Humidity Levels10/06/09
2010Optical Method for Measuring the Surface Area of A Threaded Fastener06/06/11
2007Review of in-service moisture and temperature conditions in wood-frame buildings10/15/10
2009Review of Moisture Balance Models for Residential Indoor Humidity06/26/09
2011Synthesis of Published and Unpublished Corrosion Data From Long Term Tests of Fasteners Embedded in Wood: Calculation of Corrosion Rates and the Effect of Corrosion on Lateral Joint Strength04/13/11
2007The effect of indoor humidity on water vapor release in homes10/15/10
2011The effect of tannins and pH on the corrosion of steel in wood extracts09/07/11
2010Water Vapor Sorption Isotherms for Southern Pine Treated with Several Waterborne Preservatives07/28/10
2010Wood Handbook, Chapter 04: Moisture Relations and Physical Properties of Wood06/21/10
2010Wood Handbook, Chapter 11: Wood-Based Composite Materials-Panel Products- Glued-Laminated Timber, Structural Composite Lumber, and Wood-Nonwood Composite Materials06/21/10

Project Summaries last modified: 06-21-2011