When comparing double glazed sash windows to single glazed windows, the main focus is conservation of energy. Sash windows, which consist of two or more separate panels in frames, at least one of which moves, were originally single glazed. However, with the introduction of central heating and utility bills, more efficient double glazed windows are preferred.
The earlier type of casement windows, which hinged on the sides and were opened by being pushed outwards, were the main type of window until the mid 1600s, when sash windows were invented in England. These windows consist of two or more panels, with at least one which can be raised and lowered to open the interior to outside air and close it out again.
The term glazing technically means the glass itself, although some use it to mean the act of putting the glass in the frame; this is really reglazing, or replacing the glass in a window with new putty to hold it in place. Single glazing is using one sheet of glass in a window or a mutton frame (holds individual panes that make up a sash), while double glazing is using two layers of glass with empty space in between. This inner space usually simply contains air, although some manufacturers will fill the space with gas, such as argon.
Adding an extra thickness of glass and the insulating space in between increases the insulating factor of the window to a marked degree, both against thermal penetration and noise transference. Installing windows with double panes reduces the need for both heating and cooling so much that the improvement may qualify the homeowner for tax credits from the government.
Using other methods of insulating windows usually is less satisfactory. A clear film insulation may be applied to the glass, or the glass may be tinted to block sunlight. However, the increase in energy savings will not compare to those realized by window replacement or even installing double panes in old windows, which an expert glazier can do. In this way, the integrity of an historic structure can be maintained while energy use is reduced.
Double glazed panels will function at peak efficiency as long as the airtight seal is not damaged. Modern windows often have two sheets of glass in wooden, plastic, or metal frames; the effect of panes, if desired, is obtained by false muttons glued to the glass. Modern sashes may open along one side for ease of cleaning. Vintage windows may be fitted with individual double panes by an expert glazier or shipped to a woodworking shop for the change.
In comparing double glazed sash windows to single glazed windows, the main focus is on keeping the inside of a building at a comfortable temperature with less use of costly climate control. A double paned window is far more energy efficient than a single one.
The earlier type of casement windows, which hinged on the sides and were opened by being pushed outwards, were the main type of window until the mid 1600s, when sash windows were invented in England. These windows consist of two or more panels, with at least one which can be raised and lowered to open the interior to outside air and close it out again.
The term glazing technically means the glass itself, although some use it to mean the act of putting the glass in the frame; this is really reglazing, or replacing the glass in a window with new putty to hold it in place. Single glazing is using one sheet of glass in a window or a mutton frame (holds individual panes that make up a sash), while double glazing is using two layers of glass with empty space in between. This inner space usually simply contains air, although some manufacturers will fill the space with gas, such as argon.
Adding an extra thickness of glass and the insulating space in between increases the insulating factor of the window to a marked degree, both against thermal penetration and noise transference. Installing windows with double panes reduces the need for both heating and cooling so much that the improvement may qualify the homeowner for tax credits from the government.
Using other methods of insulating windows usually is less satisfactory. A clear film insulation may be applied to the glass, or the glass may be tinted to block sunlight. However, the increase in energy savings will not compare to those realized by window replacement or even installing double panes in old windows, which an expert glazier can do. In this way, the integrity of an historic structure can be maintained while energy use is reduced.
Double glazed panels will function at peak efficiency as long as the airtight seal is not damaged. Modern windows often have two sheets of glass in wooden, plastic, or metal frames; the effect of panes, if desired, is obtained by false muttons glued to the glass. Modern sashes may open along one side for ease of cleaning. Vintage windows may be fitted with individual double panes by an expert glazier or shipped to a woodworking shop for the change.
In comparing double glazed sash windows to single glazed windows, the main focus is on keeping the inside of a building at a comfortable temperature with less use of costly climate control. A double paned window is far more energy efficient than a single one.
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The use of double glazed sash windows helps to maintain energy usage at a lower level than you would obtain with single glazing. Sash windows are historically a great way to promote natural energy efficiency.
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