No home is airtight. Of course, we don’t want it to be, as that would be dangerous to human health! However, the more air ‘leaks’ we have in the home per square foot, the harder it is to maintain a constant temperature. This means that your HVAC or furnace has to work extra hard to steady the temperature. Not only is this wasteful of fossil fuels, making it less environmentally friendly, it also increases your average energy costs. If you’re not making sure to keep your home well-insulated, this can cost you a huge portion of your monthly bills just on waste, whether it’s heating or cooling.
This becomes particularly noticeable in very extreme climates- cold or hot- but can also lead to energy savings even in a more temperate climate like ours here in the Bay Area, especially during hot summers. Windows are energy sinks, with glass windows losing the most heat through your home. Leaky doors and door frames follow as a close second.
Double pane windows introduce energy efficiency to the plan. Installing new windows, and making sure windows and doors are properly insulated, can make a huge difference to how green your home is, as well as the costs you pay on your bills. Energy efficient windows, however, tend to have a higher initial window replacement cost than single pane windows. All the same, you will typically make back how much the windows cost over time in energy savings.