Fine mesh screens of at least 1/16-inch will also help to resist the entry of embers, but will not keep flames out.Metal window screens have been shown to improve the performance of windows subjected to radiant heat exposure in wildfire conditions.This includes maintaining the surrounding vegetation and using non-combustible mulch and ignition-resistant materials for yard and garden structures. Managing the vegetation and other types of items that could catch fire in the areas nearest to your home or business is even more critical.
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How to determine if windows have tempered glass: tempered glass in a window will have a marking etched on one of the corners. Close all windows before you evacuate during a wildfire. Remember, even dual-pane, tempered glass windows will not protect your house if they are left open.
Tempered glass is about four times more resistant to breaking during a wildfire. The cost increases are relative to the opening size and the number of windows that must be replaced.These windows have the added benefits of greater energy conservation and insulation during cooler and warmer months.This will provide significant wildfire protection against flames and wind-blown embers.Replace your old windows for dual-pane, tempered glass: Improving Window Performance Replace your windows Cracks develop and propagate inward, which makes larger windows more vulnerable to breaking because they tend to have more edge than smaller windows.Glass in windows breaks because of extreme temperature differences–which develop between the exposed glass and the glass protected by the window framing material–when exposed to the heat from a wildfire (or the heat from your neighbor’s burning home).Depending on the type of glass, a window that is exposed to flames may break after only 1-3 minutes of exposure to intense heat or flames and allow flames and embers inside.Dual-pane windows have two sheets of glass that are separated by airspace.Dual-pane windows provide better wildfire protection.Testing has shown that single-pane windows are highly vulnerable to breaking when exposed to wildfire conditions.Single-pane windows are more common in older structures.More Information About Fire-Resistant Windows.Photo credit: University of California Cooperative Extension
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