Glazing is another word for window glass, and this type of window has two panes instead of one, for added insulation. The space between the panes is filled with air, or with a gas (argon), which provides heat and sound resistance. Take note: A good seal is essential to an effective double-glazed window; if yours accumulates dirt or moisture between the panes, the seal is probably compromised-this requires professional attention.
Cellulose is a natural polymer that is the basic component of plant fibers, including wood fibers. In homes, cellulose usually refers to a type of insulation that is made from wood fibers-most often, from recycled newspaper. It's a terrific development from an environmental standpoint, since it diverts a huge amount of newspaper from the waste stream, and because it's a highly effective insulator. Cellulose insulation is typically blown or packed into walls and other spaces, filling crevices and blocking heat transfer better than fiberglass and other batt insulation can. It is often treated with borate, a natural, safe mineral that repels pests and is fire retardant.
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