A single- or double-hung window whose operable sash can be tilted into a room to allowcleaning of the exterior surface on the inside.
The glass above the door, in it’s own jamb. The glass can match the door glass as well.
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Traditional window construction incorporates smaller panes of glass actually separated by muntins, rather than simulating such an appearance with larger lites of glass and a muntin grid or grille placed between or on the surfaces of the glass layers.
The measurement of the heat gain or loss through glass due to the difference between indoor and outdoor air temperatures is called the u-value or u-factor. It quantifies how well a product prevents heat from escaping a home or building. U-value ratings generally fall between 0.2 and 1.2.
Invisible rays of solar radiation at the short-wavelength end of the spectrum. Ultraviolet rays can cause fading of paint finishes, carpets and fabrics, as well as the deterioration of some materials.
An air-barrier that also restricts water vapour transmission. Six mil (.006inch) polyethylene sheet is typically used in frame walls as a vapour barrier. Most rigid plastic foam insulations (styrene, urethane, isocyanurate) are vapour barriers. Any material with a Perm Rating of less than 1 is considered a vapour barrier.
Visual transmittance (VT) indicates the amount of light in the visible portion of the spectrum that passes through a glazing material. (the lower the number, the less of the sun’s heat is transmitted through the glass.
A type of insulating glass construction using an air spacer that offers lower thermal conductance than a traditional aluminium spacer. Warm-edge IG units typically offer higher resistance to condensation and an incremental improvement in window energy performance.
A material or device used to seal the openings, gaps or cracks of venting window and door units to prevent water and air infiltration.
