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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.

Building Science: Three Biggest Building Problems are Water, Water, Water
Building Science online slide show presentation on water in buildings covers: Water A Review of Moisture Fundamentals; Focus on materials, not systems; Details of water/moisture in all its forms; Interaction of moisture with materials; Porous materials; Deeper dives.. Wood, concrete, etc. (PDF)

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

Energy Vanguard: New Orleans Make It Right Homes Go Wrong
Energy Vanguard says after Hurricane Katrina barreled through New Orleans, Brad Pitt started the Make It Right program. Their objective was to build new homes and make a vibrant neighborhood again. Fast-forward, and the homes are failing, owners have moved out of many of them, and the lawsuits have begun.

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

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.

US EPA: Moisture Control Guidance For Building Design, Construction & Maintenance
US 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)

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)

Building Science: 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.

Canadian Contractor: Science of Moisture Control
Canadian Contractor provides a summary of the three major mechanisms for moisture infiltration into a building, and what to do about them.

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. (PDF)

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.

FP Innovations: Guide For On-Site Moisture Management Of Wood Construction
FP Innovations online Guide For On-Site Moisture Management Of Wood Construction covers moisture-related properties for several categories of wood materials/built-up assemblies, related guidelines about on-site moisture management practices that adapt to suit a range of wood construction projects, and different levels and methods of protection strategies are provided based on durability risk. (PDF)

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.

GBA: Can Buildings Take Vacation Too?
Green Building Advisor describes the science of shutting down a house for extended periods of time.

GBA: Dealing With Construction Moisture
Green Building Advisor says depending on where, when, how fast, and how well you build, construction moisture—sometimes called built-in moisture—may require significant one-time management.

GBA: Extending the Reach of a Moisture Meter
Green Building Advisor describe some simple ways to measure moisture content deeper into building assemblies.

GBA: Not Your Run-of-the-Mill Moisture Problem
Green Building Advisor describes how an attic moisture problem originating in the basement has an interesting history

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.

II: 4 Steps to Prevent Excess Moisture in New Homes
Insulation Institute article by building scientist Joe Lstiburek talks about the four things builders can do to prevent excess moisture during construction.

ORNL: New Tool Evaluates Moisture Durability of Envelope
An online tool developed by researchers at Oak Ridge National Laboratory provides architects and engineers a fast and efficient way to assess the performance of a building’s envelope design before construction begins. The Building Science Advisor allows builders to evaluate the moisture durability of the envelope, or exterior, of residential 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. (PDF)

Tools Of The Trade: Why You Need a Moisture Meter
Tools of the Trade describes why you need a moisture meter, especially if you work with framing lumber and drywall.

US DOE: Moisture Performance of High-R Wall Systems
US DOE study Moisture Performance of High-R Wall Systems summarizes direct monitoring of the moisture performance of high-R walls in occupied homes in several climate zones. Robustness of the design and modeling tools for selecting high-R wall solutions is evaluated using the monitored data from the field. (PDF)

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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