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Sloped GlazingSloped glazing presents several design challenges that do not apply to vertical glazing. These include snow-loads, ponding, excessive solar intensity and safety. A less well-known but equally important challenge with sloped glazing is to adequately account for the degradation in insulation performance which affects insulating glass units when they are installed in sloped orientations. Failure to address this issue can result in unexpected condensation problems and excessive heat loss through sloped glazing areas. Maximizes Light and Blocks the HeatThe purpose of a skylight is to add natural daylight and enhance the aesthetics of the interior of a home. Heat Mirror® insulated glass provides the highest daylight to solar control ratio of any product on the market, controlling heat gain without the use of dark or reflective glass.
Project: Private Residence
Unlike most high-performance low-e insulating glass products which lose up to one third of their insulation performance when sloped, Heat Mirror Insulating Glass units experience only a 6% loss of insulation performance when sloped. Heat Mirror enables higher light transmission and lower reflectivity to be achieved in sloped glazing while maintaining the required level of thermal insulation, compared with conventional low-e insulating glass products. Superior Sloped Glazing PerformanceWhen insulating glass is tilted from vertical, it becomes a solar collector, and the U-value performance can degrade over 30% due to increased convection within the air space. This performance degradation due to sloping dramatically impacts energy efficiency and often requires compromises in the glazing design. Since Heat Mirror insulated glass creates two small air spaces instead of one large one, the convection loop is short-circuited, and the U-value performance remains close to that of the vertical glass.
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