Modifiers of the Building Envelope or Enclosure

 

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The building envelope ensures conditions of thermal, visual, and sound comfort in rooms with a minimum of energy consumption. It is not only important for energy conservation, it is also important for the health, comfort, and well-being of the building user.  Therefore, the interior environment often relates to the physical needs of people and is defined in terms of temperature, relative humidity, airflow rate, and air quality.

Climate modifiers of the envelope must be taken into account. Trees, other vegetation, garages, overhangs, and even the soil itself modify the envelope, particularly in the case of low-rise buildings such as homes. The exterior environment can be modified and comfort enhanced with existing trees and vegetation, plantings, prevailing breezes, windbreaks, and building overhangs.

Examples:

1. A roof overhang modifies the amount of rain on the wall below. It is a microclimate modifier for the vertical portion of the building enclosure.  

2. An attached garage is not conditioned indoor space nor does it experience outdoor conditions. Rather it incorporates both the exterior wall of the house and the garage wall, with the space between containing the car and other objects stored in the garage as an integral part of the enclosure.  

3. In conditioned room (s) over a garage or carport,  the garage ceiling would be considered part of the building envelope and changes in that ceiling will modify the envelope.

4. Ivy growing on a masonry wall are part of the envelope and significant impact on moisture and other loadings.

5. Adjacent buildings are also modifiers.

Other components such as lights and stoves plus space contents also modify the interior environment and thus the comfort of the user.

Thermal Envelope: The building enclosure may contain the thermal envelope--the term that refers to the thermal insulation within the building enclosure. The thermal envelope and the building envelope are not always the same.

Contact Terry Jensen at 972 251-1532 or 817 545-0140.

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For more information about green building of your home with AndersonSargent, green building education, green renovation of your present home, comfortable and healthy homes, green building joint ventures, green building sales, or green building consulting, contact Terry Jensen at 972 251-1532 or 817 545-0140.

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