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Typical penetrations through the primary components of the air barrier system include plumbing pipes and vents, electrical wires and conduits, electrical fixtures, other mechanical services, and, in… Read More
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Good design and practice involve controlling the wetting of building assemblies from both the exterior and interior and different climates require different approaches.Vapor Permeance… Read More
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As they are typically used in buildings today, vapor barriers are a cold climate artifact that has migrated into other climates more from ignorance than need. However, they often prevent assemblies… Read More
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The requirements in the code can be used for wood framed structures with temperature and humidity conditions typical of residential occupancy.Three classes of vapor control are defined depending on… Read More
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Managing exterior sources of liquid water, i.e. rainwater and groundwater, are one of the principal functions of the building enclosure system, and site work (refer to Information Sheets 101, and 301… Read More
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Claddings made of wood, fiber cement, stucco, concrete, and masonry all absorb water to varying degrees. Once the reservoirs get wet, the stored water can migrate elsewhere and cause problems.… Read More
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It is common practice to install a complete WRB on a wall assembly before attaching a deck ledger. Then, when the deck ledger is attached, structural connections at this location breech this water… Read More
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Gravity is the driving force behind drainage. The “down” direction harnesses the force of gravity and the “out” direction gets the water away from the building enclosure assemblies, openings,… Read More
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Window and doors are typically installed using one of two approaches: 1) barrier system installation or 2) a drained system installation. Barrier installations do not provide for forgiveness to water… Read More
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“Rain is the single most important factor to control in order to construct a durable structure.” - Dr. Joseph LstiburekDrainage planes (also referred to as “water resistive barrier” or WRB) are… Read More
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