Window & Door Company
3000 N. Township Blvd Pittston, Pennsylvania 18640
800.338.9997 • 570.655.2811
800.338.9997 • 570.655.2811
NTERSTATE
Composite
A blend of thermoplastic alloys that is heated, pressurized and melted through a main extruder creating a solid core extrusion.
Condensation
Condensation occurs when excess humidity in warmer air is released in the form of water droplets onto a colder surface such as a pane of glass.
K-value
The K-value of any material describes the amount of heat that moves through a material over time. The higher the K-value the more heat is transferred. Therefore a material with a lower K-value is a better insulator
Low-Emmisivity (Low-E) Glass
Low-E glass is manufactured by depositing a microscopically thin, transparent metal or metallic oxide layer on the glass. Low-E coatings reduce radiant heat loss, and can reduce the passage of UV rays. Use of heatresistant (or absorbing) glass began in the 1950s, as did the use of reflective (or mirror) glass.
R-Value
Refers to a window's resistance to thermal transfer or heat flow. The higher the value, the better the insulation.
Solar Heat Gain
Solar Heat Gain Coefficient (SHGC) measures how well a product blocks heat caused by sunlight. The SHGC is the fraction of incident solar radiation admitted through a window, both directly transmitted and absorbed, then subsequently released inward. SHGC is expressed as a number between 0 and 1. The lower a window's SHGC, the less solar heat it transmits.
U-Factor/U-Value
U-factor or U-value is a number that represents the rate of heat loss through a window or door. The lower the number, the greater a window resists the transfer of heat. A U-factor of 0.4 or lower represents good insulating value.
Visible Light Transmittance
Visible Transmittance (VT) measures how much light comes through a product. The visible transmittance is an optical property that indicates the amount of visible light transmitted. VT is expressed as a number between 0 and 1. The higher the VT, the more light is transmitted.
A blend of thermoplastic alloys that is heated, pressurized and melted through a main extruder creating a solid core extrusion.
Condensation
Condensation occurs when excess humidity in warmer air is released in the form of water droplets onto a colder surface such as a pane of glass.
K-value
The K-value of any material describes the amount of heat that moves through a material over time. The higher the K-value the more heat is transferred. Therefore a material with a lower K-value is a better insulator
Low-Emmisivity (Low-E) Glass
Low-E glass is manufactured by depositing a microscopically thin, transparent metal or metallic oxide layer on the glass. Low-E coatings reduce radiant heat loss, and can reduce the passage of UV rays. Use of heatresistant (or absorbing) glass began in the 1950s, as did the use of reflective (or mirror) glass.
R-Value
Refers to a window's resistance to thermal transfer or heat flow. The higher the value, the better the insulation.
Solar Heat Gain
Solar Heat Gain Coefficient (SHGC) measures how well a product blocks heat caused by sunlight. The SHGC is the fraction of incident solar radiation admitted through a window, both directly transmitted and absorbed, then subsequently released inward. SHGC is expressed as a number between 0 and 1. The lower a window's SHGC, the less solar heat it transmits.
U-Factor/U-Value
U-factor or U-value is a number that represents the rate of heat loss through a window or door. The lower the number, the greater a window resists the transfer of heat. A U-factor of 0.4 or lower represents good insulating value.
Visible Light Transmittance
Visible Transmittance (VT) measures how much light comes through a product. The visible transmittance is an optical property that indicates the amount of visible light transmitted. VT is expressed as a number between 0 and 1. The higher the VT, the more light is transmitted.
WINDOW TERMINOLOGY
