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Basics & Theory

Building Science: Building Envelope Moisture Theory, Problems & Solutions
Building Science online presentation describes moisture theory, and problems caused by moisture in building envelopes, and recommended solutions. (PDF)

Building Science: Capillarity & Porous Building Materials
Building Science technical insight describes how simple, porous materials are capable of wicking water large distances due to capillary suction, and how when water can move large distances only bad things can happen.

Building Science: Coquitlam Test Hut Findings 2011
Building Science online slide show presentation by Mark Gauvin describes the Vancouver leaky condo disaster, and some findings from his Coquitlam Test Hut that he built to better understand our local building envelope construction techniques and issues relating to moisture. (PDF)

Building Science: Physics Of Moisture
Building Science Seminars online presentation describes the physics of moisture as it relates to buildings. (PDF)

Building Science: Stucco Woes & The Perfect Storm
Building Science insight says the reasons for the change in stucco performance are due to several seemingly small factors that add up to a huge factor: changes in the properties of building papers and water resistant barriers, change from plywood sheathings to OSB sheathings, higher levels of thermal resistance, use of interior plastic vapor barriers, and changes in the properties of stucco renderings.

Construction Instruction: Moisture Diffusion In A Wall In Summer
Construction Instruction online animation shows how moisture diffuses through a wall in summer.

GBA: Air Flow Effects Humidity, Mold, Indoor Air Quality
Green Building Advisor describes how humidity, mold and IAQ are affected by air flow created from air leaks, wind, stack effect, and fans.

IRC: Harmful Effects Of Water On Building Materials
Canadian Institute for Research in Construction digest describes harmful effects of water on building materials such as dimensional change, corrosion, decay, blistering, efflorescence, leeching, freezing, and aesthetics. 1962
Issues & Performance

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)

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.
Procedures

Architectural Testing: Field Water Testing Lessons Learned
Architectural Testing bulletin Field Water Testing Lessons Learned discusses appropriate field test method to specifiy/use, appropriate performance criteria to specify/use, how many specimens to test, what is the pass fail criteria, what happens after failed test, and when is it acceptable to vary from industry standards, or what if there are no guidelines. (PDF)

BSC: Investigating & Diagnosing Moisture Problems
Building Science paper describes theory behind water that comes four forms: solid, liquid, vapor and adsorbed. It recommends various methods for investigating and diagnosing moisture problems in buldings.

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.

CMHC: Exterior Wall Monitoring Methods For Air Condensation & Rain
CMHC report presents three specific monitoring protocols for exterior wall air leakage, condensation and rain penetration.

Delmhurst Instrument Company: Using A Wood Moisture Meter
Delmhurst Instrument Company offers a list of FAQ to help in explaining why a moisture meter should be used, how moisture meters work, the different types, plus answers to many other questions. Select Flooring & Wood Products from the panel on left side of page.

GBA: Basics Of Moisture Meters
Green Building Advisor describes moisture meters, a simple tool for evaluating moisture and mold problems, and helping you figure out whether your building materials are too wet.

Green Dream: Keeping Commercial Buildings Dry
Green Dream podcast with Lew Harriman, director of research at Mason-Grant and author of such books as The Dehumidification Handbook, Measured Home Performance, and ASHRAE Humidity Control Design Guide, talks about the problem of moisture in commercial buildings.

SAB: Vapour Diffusion & Condensation Control In High Performance Buldings
Sustainable Architecture and Building magazine says the correct selection and placement of vapour impermeable materials within wall assemblies is fundamental to their durability, and is increasingly important as we design more highly insulated walls to meet ever more stringent energy performance expectations.

US HUD: Monitoring Internal Moisture Loads In Residential Buildings
US Department of Housing and Urban Development research collected 1 full year of indoor temperature and humidity data for a sample of 60 homes across three different climate regions, including the hot and humid Southeast, the cold Northeast, and the marine Northwest. Correlations between indoor moisture levels and climate, occupant density, and house characteristics are the focus of the results. Conclusions and recommendations for indoor moisture management or future research needs are also discussed.

Woodweb: A Guide To Using Electrical Moisture Meters
Woodweb describes the benefits and limitations of electrical moisture meters, and tips for using them effectively.
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