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Basics & Theory

BC Housing: Summary Of Performance Of Rainscreen Walls In Coastal BC
BC Housing builder bulletin Rainscreen Walls: Field Monitoring and Performance in Coastal British Columbia summarizes results of the study Performance Monitoring of Rainscreen Wall Assemblies in Vancouver. 2008 (PDF)

Building Science: Evolution Of Wall Systems And Air Gaps
Building Science provides a short history of the evolution of walls and sheathing in residential construction, and offers tips on installing various components of walls that work to properly drain and dry moisture.

CI: Four Ds Of Managing Liquid Moisture
Construction Instruction online animation describes the four Ds of managing liquid moisture: deflection; drainage; drying; durability.

Construction Instruction: Advanced Rainscreens
Construction Instruction says new research, code requirements, and material assemblies are driving strategic changes towards rainscreens. (PDF)

GBA: All About Rainscreens
Green Building Advisor answers the most common questions about rainscreen gaps between siding and sheathing.

IRC: Evolution Of Wall Design For Rain Penetration
Canadian Institute for Research in Construction technical bulletin covers the evolution of walls from massive masonry construction, to pressure-equalized curtain-wall assemblies, to development of rainscreen walls. 1997

IRC: Facts & Fictions Of Rainscreen Walls
Canadian Institute for Research in Construction article on rainscreen walls describes misunderstood principles, cavity walls, pressure equalized rainscreen, air barriers, compartmentalization, venting, and wind loading. 1990

IRC: Measuring Hygrothermal Properties Of Wood-Frame Wall Assemblies
Canadian Institute for Research in Construction paper reports on results from experimental tests on seven small-size OSB specimens to establish correlation between electrical resistance and moisture content of the OSB. (PDF)

IRC: Rain Penetration & Control
Canadian Institute for Research in Construction explains mechanisms of rain penetration, wall systems that prevent it, and introduction to open rainscreen system. 1963

JLC: Brief Description Of Rain-Managed Wall
Journal of Light Construction describes, with drawings, the four fundamental requirements for watermanaged assemblies. (PDF) Free Registration Required
Education & Training

WBDG: Online Course In Managing Moisture In Building Enclosures
Whole Building Design Guide online course Managing Moisture in Building Enclosures begins with an explanation of moisture management concepts, followed by a review of effective strategies. Then special considerations for hot humid climates are highlighted, followed by air barrier systems in buildings. Free registration required.
Industry Sectors

Building Science: Analysis & Comparison Of HardiePlank Walls In Pacific Northwest Climate
Building Science report Vancouver Field Exposure Facility, Analysis and Comparison of HardiePlank Walls analyzes performance of walls clad with HardiePlank fiber cement siding compared to some traditional stucco assemblies. The analysis includes results from two conditions: performance under normal operating conditions (i.e. without intentionally adding water) in a high-stress exterior moisture environment that is typical of the Pacific Northwest climate, and performance under intentional controlled wettings to the interior and exterior of the wood-based sheathing. (PDF)

Building Science: Field Monitoring Of Wall Vapor Control Strategies
Building Science Seminars online slide show descibes results of field monitoring of wall vapor control strategies in the Pacific Northwest. (PDF)

IRC: Research On Moisture Management for Exterior Wall Systems
Canadian Institute for Research in Construction project goal is to develop guidelines for moisture management strategies for wall systems to meet user requirements for long-term performance and durability for the wide range of climate zones across North America.

Vancouver Field Exposure Testing: Coquitlam Test Facility
Building Science Corporation and Balanced Solutions, with Gauvin 2000 Construction, have established a private, full-scale, environmental field-testing facility in Coquitlam to investigate wall moisture problems and propose future solutions.
Information Sources

APA: Online Video On Moisture Control In Residential Construction
Engineered Wood Association online video demonstrates proper moisture control techniques in construction applications, including cover groundwork, foundations, floors, walls and roofs.

Building Science: Info Sheets On Water Management & Vapor Control
Building Science online info sheets on water management & vapor control describe background theory and recommended procedures for proper design and installation. Select from list Info-301, 302, 303, 304, 305, 306, 310, 311, 312 or High R-Value Wall Assemblies.

Building Science: Papers & Reports On Rain Penetration Control
Building Science.com technical papers and reports cover rain penetration control for driving rain, drainage planes, roofs, and flashing & deflection.

Concordia Univ: Links To Resources On Rainscreen
Canadian Concordia University provides links to technical reports and resources on rainscreen concept and applications.

IRC: Seminar Documents On Moisture Control In Frame Walls
Canadian Institute for Research in Construction 2003 seminar documents cover factors that contribute to effective management of moisture in light-frame walls of low-rise buildings from the point of view of building science principles as well as their application in practice. (PDF)
Issues & Performance

Building Science: Moisture In Fat Walls
Building Science reports that based on the data, calculations, and analysis, all three test walls should have been at high risk of failure and the analytic tools used indicate that these walls should have failed. However, disassembly showed that the walls were essentially undamaged by the monitored moisture exposure. (PDF)

CI: Reducing Condensation Potential in Wall Assemblies
Construction Instruction online animation shows conversion of water from the vapor state to a liquid initiated by a reduction in temperature of the vapor.

CMHC: Study Of Envelope Drying Rates
CMHC study evaluated the effect of wall design on the drying capability of wood-frame test wall panels in a controlled laboratory environment simulating one typical Vancouver winter climate condition. 2001

CMHC: Study Of Wall Drying Of Wet Or Green Framing Lumber
CMHC Ontario Wall Drying Project studied the performance of various house wall assemblies built using wet or green framing lumber.

Greenguard: Mould & Moisture Management Standard For New Construction
GREENGUARD Environmental Institute standard ANSI/GREENGUARD Environmental Institute Mold and Moisture Management Standard for New Construction (ANSI / GEI - MMS1001) has been approved by American National Standards Institute. This national standard focuses solely on mold and moisture issues that can arise in the construction of new buildings, and details design, construction and maintenance practices for preventing the harmful growth of mold.

IRC: Criteria For Invoking Mandatory Rainscreen In Code
Canadian Institute for Research in Construction describes considerations for mandatory rainscreen code including current code requirements, need to prescribe rainscreen, parameters & criteria to define protection, and issues to consider. 2001 (PDF)

IRC: Drying Response Of Wood-Frame Construction
Canadian Institute for Research in Construction report on Drying Response Of Wood-Frame Construction summarizes experimental results and use of an advanced hygrothermal computer model called hygIRC to assess hygrothermal response of various components in wood-frame wall assemblies when subjected to nominally steady-state environmental conditions. (PDF)

IRC: Effects Of Climate & Design On Wetting & Drying Of Walls
Canadian Institute for Research in Construction report explains how the wetting and drying of walls is effected by local climate and building design, including causes and solutions.
Procedures: Design & Plan

APA: Avoiding Moisture Penetration In Walls
Engineered Wood Association describes critical construction considerations and guidelines for avoiding moisture penetration in walls. (PDF) Free site registration required.

ASTM: Purchasable Book On Moisture Control In Buildings
ASTM International sells Moisture Control in Buildings: The Key Factor in Mold Prevention: 2nd Edition. Twenty-eight comprehensive chapters focus on the major issues involved in the process of moisture resistive construction. $147

BC Gov: Calculating Effective Thermal Resistance Of Rainscreen Wall Assemblies
BC Building and Safety Standards Branch bulletin Calculating the Effective Thermal Resistance of Rainscreen Wall Assemblies provides values for common materials in these assemblies to support the calculation of effective thermal resistance. (PDF)

BC Housing: Wind-Driven Rain In Coastal BC
BC Housing study objectives were to quantify the amount of rain impinged on typical building wall surfaces, to establish the influence of overhang on wind-driven rain exposure, and to verify the empirical method of quantifying wind-driven rain based on comparisons to new measurements at various locations in Metro Vancouver. (PDF)

BCBEC: Coquitlam Test Hut Findings On Wetting & Drying Of Exterior Insulated Walls
BC Building Envelope Council online slide show Wetting and Drying of Exterior Insulated Walls by Mark Gauvin describes test procedures and results from his Coquitlam Test Hut. Key findings include rrying is slow in all wall assemblies with or without exterior insulation, rainwater management is critical for all assemblies, interior/exterior RH cause wetting, control indoor RH with ventilation, and raising sheathing temperature using exterior insulation helps. (PDF)

BSC: Water Management With Housewraps, Flashings & Windows
Building Science Consulting paper, with drawings, describes design considerations for water management with housewraps, flashings, and windows. (PDF)

Building Science Press: Purchasable Book On Water Management For Houses
Building Science Press book Water Management Guide by Dr. Joe Lstiburek, covers recommendations for minimizing rain water & ground water intrusion into homes. $18 USD.

Building Science: Coquitlam Test Hut Provides Wall Moisture Insights
Building Science describes some research results from the Coquitlam test hut that give insights into wall systems and moisture.

Building Science: Drainage, Holes & Moderation To Prevent Leaks
Building Science digest says drainage of water is key to preventing building leaks. And pressure equalization, if it applied at all, is for joints and not for entire wall assemblies. Claddings should be drained, and ventilated if you must. Whereas joints in insulated glazing units, pre-manufactured windows both residential and commercial, joints in precast panels and connections between windows and wall assemblies can be pressure equalized but regardless they should be drained.

Building Science: Drainage, Storage & Drying Behind Cladding Systems
Building Science paper documents experimental methodology, details, and results and discuss how this information can be applied to modeling drained wall systems. Practical applications and research questions arising from the work are presented. (PDF)

Building Science: Hockey Pucks & Hydrostatic Pressure
Building Science describes how barriers in the airspace between cladding and building paper can cause water to build up and be held in the space, causing perched water, which exerts a force on the wall assembly.

Building Science: Holes & Leaks
Building Science says to claim that something that has holes in it can act as a water control layer is a pretty interesting argument. It is both true and untrue.

Building Science: How Buildings Age
Building Science says if you donít do the water control donít insulate. If you donít do the water control and you insulate you are basically euthanizing your building.

Building Science: Moisture Control For New Residential Buildings
Building Science paper describes strategies can be implemented to minimize the risk of moisture damage in new homes. The strategies fall into the following three groups: control of moisture entry; control of moisture accumulation; removal of moisture.

Building Science: Papers & Reports On Rain Penetration Control
Building Science.com technical papers and reports cover rain penetration control for driving rain, drainage planes, roofs, and flashing & deflection.

Building Science: Principles Of Water Management
Building Science paper describes principles and steps to follow when dealing with water from the foundation to the roof. (PDF)

Building Science: Proper Design Of Water Managed Wall Systems
Building Science.com report explains how to show water to the exit with well-detailed drainage plane and flashings for walls with wood, vinyl, brick, or stucco cladding. 2003 (PDF)

Building Science: Rain Control
Building Science online slide show presentation on rain control covers driving rain load & &wind, penetration forces, risk, rain control strategies, flashing & details, window & door openings, and curtainwalls & precast. (PDF)

Building Science: Rain Control For Building Enclosures
Brisling Science online presentation describes problems and solutions for rain control within building enclosures. (PDF)

Building Science: Rain Control For Healthy, Durable, Low Energy Buildings
Building Science online slide show describes issues and considerations for rain control for healthy, durable, low energy buildings. (PDF)

Building Science: Rain Control for Walls: Venting, Ventilation, Drainage
Building Science online slide show presentation Rain Control for Walls: Venting, Ventilation, Drainage, covers rain control basics, role of ventilation and drainage, what makes them work, and when do we need them. (PDF)

Building Science: Rain Control Strategies
Building Science online slide show presentation covers rain control risk factors, different strategies of rain deflection, 3 rain control strategies for enclosures, and some construction details. (PDF)

Building Science: Rain Control Theory
Building Science digest presents the development of a rational and rigorous means of describing, understanding, and classifying rain control for the above-grade enclosure.

Building Science: Simplified Prediction Of Driving Rain On Buildings
Building Science digest Simplified Prediction of Driving Rain on Buildings: ASHRAE 160P and WUFI 4.0 describes how to calculate magnitude, duration, and frequency of driving rain and driving rain deposition on buildings.

Building Science: Super Insulated Walls & Moisture
Building Science online slide show presentation describes discusses super insulated walls and moisture. It covers what are the risks associated with high-R or superinsulated walls, relative to conventional/code construction, what are some of the options for constructing high-R walls in cold climates, how does a vapor-open high-R wall behave in a very cold climate in terms of moisture risks, and what moisture conditions and resulting damage are seen at double stud wall sheathing after experiencing high interior humidity conditions. (PDF)

Building Science: Understanding Drainage Planes
Building Science.com paper explains how drainage planes, flashings, siding & cladding, windows & doors, building materials, and building connections should be designed and constructed to shed or drain water to the exterior.

Building Science: Vitruvius Does Veneers, Drilling Into Cavities
Building Science report says it is instructive to look at the evolution of walls from a water management perspective, so at to decide what the airspace or air gap should be behind a cladding and what the venting geometry should be behind a cladding.

Building Science: Water And Walls
Building Science says walls can be designed to dry to the outside or to the inside or to both sides. Lots of choices, lots of possibilities. What you do depends on where you are and what you are building with.

Building Science: WUFI No Longer Barking Up The Wrong Tree
WUFI is a modeling program for simulating one-dimensional dynamic heat and moisture transfer through a building enclosure. Building Science says it has turned into a useful modeling tool and is getting progressively more useful.

CMHC: Architects Guide To Keeping Walls Dry - Part 1
CHMC article for architects describes considerations for designing walls that stay dry, common causes of problems, sources of moisture and methods of controlling, and wall designs including drained cavity walls, simple rainscreen walls and pressure-equalized rainscreen walls. 2004 (PDF)

CMHC: Architects Guide To Keeping Walls Dry - Part 2
CHMC article for architects on keeping walls dry describes pressure differences; 4-Ds of deflection, drainage, drying & durability; wall design strategies, selecting a strategy, and computer modelling software. 2004 (PDF)

CMHC: Best Practice Guide Building Technology: Wood-Frame Envelopes in the Coastal Climate of British Columbia
CMHC provides guide covering prevention of wood decay; controlling moisture sources; application of rainscreen; heat flow; appropriate materials; and developing a building envelope maintenance and renewal plan. (PDF)

CWC: Controlling Moisture In Wood Frame Buildings
Canadian Wood Council online booklet outlines moisture issues and provides background, design, rainscreen walls, construction details, and quality assurance for building wood frame buildings. PDF)

Energy Vanguard: 6 Materials That Drain The Rain On The Plane
Energy Vanguard describes six materials that drain the rain on the plane and keep a house dry.

Energy Vanguard: Design Flaws That Can Rot Your House
Energy Vanguard says those of us in the world of building science know that when materials on the outside get wet, they stay wet longer now because buildings are better insulated. When water gets into that exterior sheathing or the framing behind it, things rot.

EPA: Moisture Control Guidance For Building Design, Construction & Maintenance
EPA online guide Moisture Control Guidance for Building Design, Construction and Maintenance provides building professionals with practical guidance to control moisture in buildings during design, construction and maintenance. It includes specific guidance related to site drainage, foundations, walls, roof and ceiling assemblies, plumbing systems, and HVAC systems as well as methods for verifying the appropriate implementation of the recommendations. (PDF)

GBA: All About Wall Rot
Green Building Advisor says if your wall sheathing is rotten, the first thing you need to figure out is where the moisture came from.

GBA: Four Ways Water Gets Into Buildings
Green Building Advisor describes how water enters buildings by bulk transport, by capillarity, by piggybacking with infiltrating air, and by vapor diffusion. Once you get your priorities straight, you can implement strategies to prevent water damage.

GBA: Is Cold OSB Wall Sheathing A Risk?
Green Building Advisor discusses whether or not, if you build a very thick wall, your sheathing will stay cold and wet.

GBA: Monitoring Moisture Levels In Double-Stud Walls
Green Building Advisor discusses whether there is any evidence that double-stud walls have damp sheathing.

GBA: Rain Control In Energy Efficient Brick Buildings
Green Building Advisor podcast on Rain Control in Energy Efficient Buildings features Dr. Joe Lstiburek describing rain control in well-insulated buildings; specifically, how brick is affected by water, how it used to be installed, how it's installed today, how it should be installed, and why.

Home Innovation: Moisture Performance Of Walls In Energy Efficent Homes
US NAHB Home Innovation Research Labs report Moisture Performance of Walls in Energy Efficient Homes focuses on characterization of energy-efficient walls in a sample of new, occupied homes recently constructed around the US in moist or marine climate zones. (PDF)

IRC: Designing Exterior Walls To Rainscreen Principle
Canadian Institute for Research in Construction provides considerations, procedures, and detail drawings for designing exterior walls to the rainscreen principle. 1999

JLC: Does Size Of Rainscreen Gap Matter?
Journal of Light Constriction Q & A makes recommendations for how small a Rainscreen gap can be without losing effectiveness, and a couple of types of products to use.

NAHB: Moisture Performance Of Energy-Efficient & Conventional Wood Wall Systems
Home Innovation Research Labs report Characterization of the Moisture Performance of Energy-Efficient and Conventional Light-Frame Wood Wall Systems summarizes monitoring of the moisture performance of various wall assemblies with specific design characteristics. (PDF)

NREL: Evaluation Of Effective Moisture Penetration Depth Model For Estimating Moisture Buffering
US National Renewable Energy Laboratory report Evaluation of the Effective Moisture Penetration Depth Model for Estimating Moisture Buffering in Buildings examines the effective moisture penetration depth (EMPD) model, and its suitability for building simulations. (PDF)

US DOE: Guidance On Taped Insulating Sheathing Drainage Planes
US Department of Energy online Measure Guideline: Guidance on Taped Insulating Sheathing Drainage Planes describes how to provide durable and long-term water management solutions using exterior insulating sheathing as part of the water management system. (PDF)

US DOE: High-R Walls For Remodeling: Wall Cavity Moisture Monitoring
US Department Of Energy report High-R Walls for Remodeling: Wall Cavity Moisture Monitoring focuses on the performance of wall systems, and in particular, the moisture characteristics inside the wall cavity and in the wood sheathing. While this research initially addresses new home construction, the goal is to address potential moisture issues in wall cavities of existing homes when insulation and air sealing improvements are made. (PDF)

US DOE: Moisture Management For High R-Value Walls
US Department of Energy online report Moisture Management For High R-Value Walls explains the moisture-related concerns for high R-value wall assemblies. (PDF)

US DOE: Moisture Management For High R-Value Walls Summary
US Department of Energy brief Moisture Management For High R-Value Walls summarizes how eight high-R walls handle the three main sources of moisture, construction moisture, air leakage condensation, and bulk water leaks.

US DOE: Moisture Research For Optimizing Wall Assemblies
US Department of Energy report Moisture Research: Optimizing Wall Assemblies evaluated several different configurations of wall assemblies to determine the accuracy of moisture modeling and make recommendations to ensure durable, efficient assemblies. WUFI1 and THERM2 were used to model the hygrothermal and heat transfer characteristics of these walls. (PDF)

US DOE: Water Management Of Noninsulating & Insulating Sheathings
US Department of Energy report Water Management of Noninsulating and Insulating Sheathings discusses approaches to reliably and durably seal the joints in rigid polymeric foam sheathing. It summarizes current research, serves as an information package, summarizes issues that have been experienced with current best practices, and recommends ways in which the best practices can be improved, including some generic details for typical residential building practices. (PDF)

US FPL: Hygrothermal Analysis Of Wood-Frame Wall Assemblies In Mixed-Humid Climate
US Forest Products report Laboratory Hygrothermal Analysis of Wood-Frame Wall Assemblies in a Mixed-Humid Climate uses a one-dimensional hygrothermal model to investigate the moisture performance of 10 residential wood-frame wall assemblies in a representative mixed-humid climate location of Baltimore, Maryland. (PDF)

US HUD: Best Practice Guide For Moisture Resistant Homes
US Department of Housing & Urban Development online best practice guide covers designing, building, and maintaining houses that manage moisture effectively, with sections on roof, walls, foundations, water vapour, and mechanical. 2006

WBDG: Moisture Management Concepts
Whole Building Design Guide provides a brief overview of moisture related problems, consequences, and resources.
Procedures: Detail Drawings

APA: Details & Tips for Moisture Resistant Homes
Engineered Wood Association provides construction details and tips for designing and building moisture resistant building envelopes, including foundations, walls, and roofs. Free site registration required.

BC Housing: Purchasable Building Envelope Guide For Houses, With Rainscreen Details
BC Housing guide, with rainscreen details, provides practical information related to design and construction of building envelopes for new homes constructed in accordance with Part 9 of 2006 British Columbia Building Code and 2007 Vancouver Building By-Law. $55 CDN

Construction Instruction: 2-Inch Exterior Insulation with Structural Rainscreen
Construction Instruction online animation shows steps to installing 2-inch exterior insulation with structural rainscreen.

HPO: Purchasable Building Envelope Guide For Houses With Rainscreen Details
BC Homeowner Protection Office sells this Building Envelope Guide For Houses, with rainscreen details, that provides practical information related to the design and construction of the building envelope for new homes constructed in accordance with Part 9 of the 2006 British Columbia Building Code and 2007 Vancouver Building By-Law. $55 CDN

MTCC: Details Of Rainscreen Wall & Wndows
MTCC 1170 online Reference Guide of Typical Rainscreen Wall & Window Details contains detail drawings for rainscreen wall and flashing components that meet the new 2006 BC Building Code Part 9. 2007 (PDF)

National Warranty: Guide For Rainscreen Wall & Window Details With Fibre Cement Cladding
National Home Warranty online reference guide provides typical wall and window rainscreen details for fibre cement cladding. (PDF)

National Warranty: Guide For Rainscreen Wall & Window Details With Vinyl Siding
National Home Warranty online reference guide provides typical wall and window rainscreen details for vinyl siding. (PDF)
Procedures: Install

Adhesives: Testing For Water Leakage & Role For Sealants
Adhesives describes an often employed test related to ASTM E331-00(2009) Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference.

Building Green: Hygrothermal Building Assessment
Building Green says when a building is examined from a hygrothermal perspective, both moisture and heat flows on, off, and through your building are systematically tracked and evaluated.

CMHC: Commissioning Protocol For Rainscreen Wall
CMHC research highlight includes a discussion of performance criteria for designing and commissioning a rainscreen wall, a commissioning protocol for on site verification of compliance, and a case study of a precast and limestone exterior rainscreen wall. 1996

GBA: Fastening Furring Strips To Foam-Sheathed Wall
Green Building Advisor describes how should you attach strapping when building a house with foam sheathing, and your siding is installed over vertical rainscreen strapping installed on top of the foam.

Green Homebuilding: Installing Siding For Rainscreen Walls
Green Homebuilding offers this article from Fine Homebuilding magazine that describes how spacing the siding away from the housewrap promotes ventilation and drainage for long-lasting siding and paint. (PDF)
Procedures: Pressure Equalize

CMHC: Field Monitoring Of Pressure Equalized Rainscreen Walls
CMHC researched methods for the measurement and monitoring of pressure equalized rainscreen field performance, including a laboratory exploration of wetting and drying of rainscreen cavities, development of a field monitoring method, and monitoring of two rainscreen systems in the field.

CMHC: Study Of Pressure Equalized Rainscreen Cladding
CMHC reports on tests to better understand and predict pressure equalization performance of rainscreen vinyl, stucco, and brick veneer cladding systems on wood frame walls.

CMHC: Test Method For Pressure Equalized Rainscreen Walls
CMHC field tested the Cavity Excitation Method of testing for performance verification of pressure equalized rainscreen systems. 1996

CMHC: Understanding Pressure Equalized Rainscreen Wall Systems
CMHC article for architects explains forces that push rain into buildings, damage caused, design influences, rainscreen concept, pressure equalization, calculating venting, window & joint design, and when to choose rainscreen. (PDF)

IRC: Pressure Equalization In Rainscreen Wall Systems
Canadian Institute for Research in Construction bulletin defines pressure equalization and various elements that must be incorporated in a pressure equalized rainscreen wall to minimize rain penetration due to air pressure differentials. 1998 (PDF)

University of Waterloo: Pressure Moderation & Rain Penetration Control
University of Waterloo online article by Canadian Dr John Straube gives detailed summary, with field results, of the performance of pressure equalized rainscreens. 2001 (PDF)
Procedures: Ventilate

ASHRAE: Investigation of Ventilation Drying of Rainscreen Walls
ASHRAE provides a detailed research report on the drying potential of natural ventilation in screen-type, enclosure wall systems and recommends that in many instances, ventilation or convective air movement may be the only means of fully drying the outer portion of the wall. (PDF)

BRIK: Materials & Assemblies For Ventilated Building Envelopes In Warm Climates
BEST4 Conference paper Cool Skins: Materials and Assemblies for Ventilated Building Envelopes in Warm Climates presents a new phase of inquiry that further characterizes the thermal behavior of ventilated building skins, with special emphasis on the role of radiation, cladding equilibrium temperature, and behavior of the cladding as an assembly with continuous external insulation. (PDF)

Building Science: Ventilated Wall Claddings Review, Performance, Modeling
Building Science research paper investigates use of the WUFI software - source and sink - approach in a one dimensional model to simulate ventilation and rain leakage behind claddings. The simulation predictions are compared to the field performance of several different wall assemblies. Lessons learned on the use of this new model will be discussed. The impact of such effects as rain water leaks and cladding ventilation rates are also investigated. (PDF)

CMHC: Study Of Vapour Diffusion Ports For Drying Wood Walls
CMHC study shows that vapour diffusion ports can make a substantial difference in OSB-sheathed panels, but likely to make no substantial difference in plywood sheathed panels.

JLC: Easy, Low-Cost, Drainable Strapping For Rainscreen Siding
Journal of Light Construction describes a clever way to make durable, drainable strapping for rainscreen siding.

ORNL: Ventilation Space Behind Rainscreen Wall
US Oak Ridge National Laboratory paper discusses the improvement of moisture transport in rainscreen walls when ventilation space is included. 2001 (PDF)
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