Wood frames and trim pieces are secure, no cracks, rot or decay
Joints around frames are caulked
No broken glass (window or storm panes) or damaged screens, no broken double paned, insulated window seals.
Mun-tin and mullion glazing compound in good condition
Storm windows or thermal glass used
Drip caps installed over windows
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Windows can account for substantial heat loss in cold weather and heat gain in warm weather. Single-pane windows, found in nearly 50 percent of American homes, are the most extreme in terms of energy-inefficiency [source: Money Matters 101]. Improving the energy infrastructure of your home will reduce home heating and cooling costs and help reduce fossil fuel consumption, slowing down the carbon emissions that are disrupting the global climate.