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What relative humidity should I have in my home? Seems like a simple enough question. However, the answer can sometimes be difficult to understand.

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

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

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

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

This is a concise overview of the principles and steps to follow when dealing with water from the foundation to the roof.

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

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

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

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