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Unvented roof systems can be safely used in many different climates. In cold climates, insulating sheathing must be added exterior to the roof sheathing to prevent condensation on the underside of… Read More
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Wood moves. Drywall does not move. Interesting problem. The more you attach drywall to wood, the more cracks you have. Easy, attach the drywall to less wood, and, in a way, that allows the wood to… Read More
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The primary function of a housewrap or building paper is rain penetration control. It is not air infiltration despite what the manufacturers say. The energy aspects of housewraps are vastly… Read More
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The manufacturers of housewraps have for years promoted the fantasy that water vapor in wall assemblies only moves one way – from the inside out. So, therefore, walls should be designed to “breathe”… Read More
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Brick is a reservoir cladding, meaning that it absorbs and stores water (rain) when it becomes wet. In some homes, with brick veneer cladding systems, mold contamination has occurred within exterior… Read More
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This is a concise overview of the principles and steps to follow when dealing with water from the foundation to the roof.
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This report provides transfer grille sizing information excerpted from “BA-0006: Discussion of the Use of Transfer Grilles to Facilitate Air Flow in Central Return Systems.” The goal is to prevent… Read More
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Most of us are not aware of just how differently these two barriers work in building assemblies. This article makes the differences as clear as the polyethylene film that should (or more likely… Read More
- RR
Masonry walls are generally highly durable. However, when masonry walls are too wet during freezing spells, freeze-thaw damage can occur. This issue has particular relevance for energy efficiency… Read More
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Thermal Metric Test Wall Construction and Installation
The Thermal Metric (TM) research project uses a novel hot box apparatus to investigate multiple factors that contribute to thermal performance… Read More
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This report provides a summary of the Thermal Metric Project and results of Reference Wall testing. The Thermal Metric Project is a multi-year collaborative research project headed by Building… Read More
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The Thermal Metric Hot Box Apparatus
For the purposes of the Thermal Metric (TM) research project a novel double-guarded hot box apparatus was designed and constructed (Figure 1). The apparatus is… Read More
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The Thermal Metric (TM) project was initiated in 2007 to support good design and construction practices by improving the way thermal performance is measured. Ultimately, the project goal is to… Read More
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Vancouver Test Hut Phases I-III Wall Assemblies
The Vancouver Test Hut is a 900 square foot field testing facility located in Coquitlam, BC, on the rooftop of the two story commercial office… Read More
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Vancouver Test Hut Phase IV Wall Assemblies
The Vancouver Test Hut is a 900 square foot field testing facility located in Coquitlam, BC, on the rooftop of the two story commercial office building… Read More
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The Vancouver Test Hut Facility
The Vancouver Test Hut is a 900 square foot field testing facility located in Coquitlam, BC, on the rooftop of the two story commercial office building occupied by… Read More
- RR
The Vancouver-area “leaky condo crisis” began to surface in the 1980s. An unusually large number of moisture-related problems, not only in condos but also in most building types, prompted extensive… Read More
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- VID
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This article is the fourth in a series on various building diagnostic tools and techniques to sleuth out problems in buildings.
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Temperature and humidity meters are useful tools for building investigations, specifically to measure HVAC equipment performance.
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A nuanced look at thermal imaging and how it can shed light on much more than heat loss.
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