Page 52 - All Weather
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GLOSSARY
GLOSSARY
BRICKMOULD and edge of glass, and air leakage heat U-VALUE
loss. The combined effect is measured in
Attached to the window and covering the number of watts per square metre and is A measure of the rate of nonsolar heat flow
gap between your home's exterior and the either positive or negative. A positive through a material or assembly. The lower
window frame, it allows you to change out number represents a net heat gain and the U-Value, the greater a window’s
your current windows without disturbing helps in reducing the home’s heating resistance to heat flow and the better its
the exterior of your home. costs. A negative number indicates that insulating value.
the product loses more energy through
BUILT GREEN CANADA heat loss and air infiltration than it gains VISIBLE LIGHT TRANSMITTANCE
in solar energy absorbed from the sun
Built Green Canada is a third party (i.e. the home’s heating system has to The percentage or fraction of the visible light
certification program established in work harder in colder weather). spectrum that is transmitted through the
2003 that promotes environmentally glass of a window or skylight as reduced by
responsible building practices and MULLION the sash material and reluctance of the glass.
products. The Built Green name means
All Weather Windows practices resource- A mullion is the vertical piece that WARM EDGE SPACER
efficient and environmentally friendly connects side-by-side units of a window.
construction – providing healthier indoor Spacers appear around the perimeter of the
air, preserving natural resources and PASSIVE SOLAR HEAT GAIN sealed glazing unit to provide uniform
improving a home’s durability. separation between the panes of glass in
Solar heat that passes through a multiple-paned windows. They absorb
CSA CERTIFICATION material and is captured naturally, moisture from the trapped air in the space
not by mechanical means. between the glass, preventing fogging
CSA (Canadian Standards Association) and condensation. A high-performance
provides product testing and certification RELATIVE HEAT GAIN warm edge spacer can increase the
services for a variety of products. energy efficiency of a window.
Recognized internationally, a CSA A calculated relationship of heat gain
certification mark indicates that All (through a window system) that accounts WEATHERSTRIPPING
Weather Windows’ products have been for centre-of-glass U-Value and centre-of-
tested by experts, and meet recognized glass shading coefficient based on a Weatherstripping is a component of a
standards for safety and performance. standard inside and outside temperature. window that provides a seal between
the frame and the sash. It is used to
DOOR JAMB SASH prevent air leakage. The better the
weatherstripping, the better the
For doors, the jamb is the vertical portion The framework that holds the panes of a window performance.
of the frame onto which a door is secured. window in the window frame. Most commonly
The jamb holds the weight of the door refers to the moving part of a window that WINDOW JAMBS
through its hinges, making it a significant opens but is also available in a non-opening
component to the overall durability and fixed and picture sash window style. Window jambs are located inside the
security of the door. framing of a window, along the top and
SHADING COEFFICIENT sides for structural support. Inferior jambs
ER(ENERGY RATING)-RATING can be a weak point in a window, allowing
A glass measurement comparing solar heat for leaks or security concerns.
An ER-rating is derived from solar heat transmission, related to 1/8 inch clear glass.
gain, heat loss through frames, centre
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