![]() It should be maintainable, durable, and cost-effective, and do everything it's supposed to. ![]() It needs to comply with safety-focused Canadian building codes, including the National Fire Code of Canada. Safety functions, including meeting fire codes and security requirements are critical. Aestheticsīuildings are expected to be attractive, as well as provide all required functions. It insulates against extreme temperatures and provides sound dampening. An air barrier, or air barriers, block wind and prevent airborne particulates from entering, for better air quality. It keeps water out through moisture barriers, like a secondary waterproofing membrane. It needs to control the elements, such as water, air, and temperature between the building's exterior and interior. It also needs to address structural movements such as movement caused by expansion and contraction, using expansion joints and careful design. It needs to meet structural needs and support its own weight against internal and external forces. The envelope has many functions, needing to be responsive to natural elements like snow and wind, and human concerns like safety and security. A good design takes all of these subsystems and factors and impacts into account and addresses them. If systems are well designed, compatible, and working well together, the envelope is effective, and the public doesn't even notice it. ![]() The occupants themselves can affect how building enclosures work. How well the building envelope, also known as a building enclosure, works overall is based on subsystem envelope solutions, like air conditioning, heating, ventilation systems, and electrical and plumbing systems. More precisely, it's an engineering system of structural integrity, moisture, and temperature control, as well as other aspects, working together in an overall design. The physical elements of a building, like walls, roofs, foundations, windows, and doors, that separate the dry, conditioned indoors from the uncontrolled outside, are the building blocks that establish the envelope. A building envelope system is, at the most simple level, the shell of a building to protect the interior and keep out natural elements. ![]()
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