![]() ![]() Imagine your contractor's crew has just spent the day installing a fluid-applied air barrier on the exterior wall of your building, taking care to get a nice, consistent thickness to ensure proper per. SeptemStay dry: Why rain resistance matters when choosing an air barrier What is the environmental impact of the materials used in your buildings? Building owners and architects are increasingly asking that question as LEED and other “green building” standards grow in popu. With pressure increasing to improve the energy efficiency of buildings - and increasing attention paid to building science - the building industry has seen important revisions to building codes and st. Understanding how much water vapor can pass through various materials used in wall assemblies is an important factor in selecting an air barrier to meet a specific wal. JanuASTM E 96: Testing Water Vapor Transmission through Materials JanuASTM E 2357: Air Leakage Testing for the Real Worldīy reducing air leakage, a continuous air barrier assembly can improve a building’s energy efficiency and reduce the risk of moisture damage within wall assemblies. An intact, working barrier helps to stop water loss. Water resistance is a critical performance factor for a building envelope, especially in climates where wet, wind-driven rain is a common condition. The simplest purpose of your moisture barrier is found in its name. *Some basic facts about colloidal silica densifier.JanuASTM E 331 and ASTM E 1105: Testing Water Resistance of Exterior Walls
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