Understanding & Designing about the Building Envelope that can reduce the heating of a Building

The "building envelope" of your house includes the outside walls, windows, doors, roof, skylights, etc. of your home. It is the skin of your house and helps protect everything inside it. The kind of building envelope you choose will determine how comfortable your home remains at different times of the day, night and during the year. This is because a well-designed building envelope keeps your home as warm, cool, or lit as you want for longer, so that you don’t have to use heaters, air-conditioners or indoor lighting as often.

Understanding how heat flows helps us understand how our houses’ building envelope will function. Heat moves from a warm to a cool space. This flow of heat occurs if your building envelope is not designed to suit the climate in which you live, and can cause discomfort especially during peak summer or winter, when the difference in temperature inside and outside your home is significant.























Figure1 Building envelope and energy exchange.



Heat flow, in and out of the building through its walls and roofs is faster when

  • The temperature difference between the outdoor and indoor is greater
  • and when wall and roof area exposed to outside is more.
  • and the wall, roof or floor material itself are good conductors of heat




Various cost effective passive design methods described below can be inculcated in the design of your homes to bring down the electricity consumption and to increase the comfort-level.