TexasIsHot – Energy Efficiency

Air Leaks

Aug 28 2009

Storm Windows

why-storm-windowsIf you have old windows in your home, the best way to improve your home’s energy efficiency is to replace them with new, energy-efficient windows. However, if you’re on a tight budget, a less expensive option is to use storm windows. Some types of storm windows are also a good option for those living in apartments.

Even though storm windows add little to the insulating performance of single-glazed windows (that are in good condition,) field studies have found that they can help to reduce air movement into and out of existing windows. Therefore, they help reduce heating and cooling costs.

Types of Storm Windows

Storm windows are available for most types of windows. They can be installed on the interior or exterior of the primary window. They range from the inexpensive plastic sheets or films designed for one heating season, to triple-track glass units with low-emissivity coatings that offer many years of use. Mid-priced storm windows may use glass, plastic panels, or special plastic sheets that have specific optical qualities. Those made of polycarbonate plastic or laminated glass also offer a high degree of resistance to breaking during storms and/or from intruders.

For the most part, interior storm windows offer greater convenience than exterior storm windows. They’re easier to install and remove; they require less maintenance because they’re not exposed to the elements; and, because they seal tightly to the primary window, they’re more effective at reducing air infiltration. Interior storm windows also are often the best choice for apartments and houses with more than one floor. If you can afford exterior storm windows, you can probably afford some newer, more energy-efficient windows, which will be a better investment.

Glass pane types offer better visibility and longer life than plastic pane types, but glass is heavy and fragile. In general, plastics are most economical for people with small budgets or who live in apartments. However, while inexpensive and relatively easy to install, they are easy to damage. Plastic panels, such as Plexiglas and acrylics are tougher and lighter than glass, but may scratch easily. Some may turn yellow over time as well. Some plastic films may significantly reduce visibility and degrade over time when exposed to sunlight.

Wood, aluminum, and vinyl are the most common storm window frame materials. There are advantages and disadvantages to all types of frame materials. Although very strong, light, and almost maintenance free, aluminum frames conduct heat very rapidly. Because of this, aluminum makes a very poor insulating material.

Wood frames insulate well, but they weather with age. They also expand and contract according to weather conditions. Wood-frame storm windows installed during the winter may not close easily during the summer, and those installed during the summer may fit loosely in the winter. They can also be quite heavy and thicker than metal frames. This can make storage difficult, reduce the view out the window, and reduce the amount of natural light in the room. Wood frames also require the most maintenance. There are, however, aluminum- or vinyl-clad wood frames that reduce maintenance requirements.

Vinyl frames are usually made of polyvinyl chloride (PVC) with ultraviolet light (UV) stabilizers to keep sunlight from breaking down the material. They, however, may expand and warp at high temperatures, and crack in extremely low temperatures. Also, if sunlight hits the material for many hours a day, colors other than white will tend to fade over time.

Installation

No matter what type you choose, the storm window frame must be hung square with the primary window and sealed to the opening. You should also consider the fact that they should be easy to move to allow for cleaning and ventilation.

Exterior-mounted storm windows must have “weep holes” at the bottom of the frame to allow any moisture that collects between the primary window and the storm window to drain out. Even though these drainage holes subtract from energy savings, not having them will eventually cause the primary window frame to rot, and possibly make them impossible to operate.

Source: www.energysavers.gov

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Testimonials
  • "“As the Texas population continues to grow, so will our energy consumption needs. We must have tools that empower the consumer to choose their products and monitor their usage wisely. TexasIsHot.org is a great resource, which is exactly what Texans need in today’s deregulated market.”" - State Rep. Burt Solomons (R-Carrollton), Chairman of House State Affairs Committee
  • "In order to meet our goals, we need programs like the TexasIsHot campaign to help change the way people think about energy." - State Sen. Troy Fraser (R-Horseshoe Bay), Chairman of Senate Natural Resources Committee
  • "Texas leads the nation in wind power because it makes money, not because it makes us feel better. Texans are a practical, penny-wise people who I think will be happy to learn how to save a few bucks on their power bills with the common-sense advice at TexasIsHot.org."-Jerry Patterson, Commissioner of the Texas General Land Office
  • "If every Texas household adopted just a few of the dozens of energy efficiency strategies referenced on TexasIsHot.org, our air would be cleaner, our limited supply of natural resources would be better protected, and our wallets would be heavier..." Kip Averitt (R-Waco), Former State Senator and Chairman of Senate Committee on Natural Resources
  • ”The TexasIsHot campaign targets an important piece of the clean energy effort -- educating Texans on the way we use electricity and quantifying the financial and environmental costs associated with our use. By just reducing the amount of electricity we use and waste, TexasIsHot.org can show people how to save money..." State Sen. Kirk Watson (D-Austin)
  • "Fluctuating energy costs are really hurting Texas families and businesses, but by just making a few easy changes, Texans can cut down on energy waste. TexasIsHot.org is a tremendous resource which arms consumers with the information they need to save themselves money by becoming more energy efficient, and help our environment." State Sen. Rodney Ellis (D-Houston)
  • "Texas is the third fastest growing state in the nation with a net growth of 1,000 people each and every day. This brings many challenges including providing clean and affordable electricity. That is why I'm excited about TexasIsHot.org. This website is an instructional resource that will help Texans save on their energy bills at home and in the workplace..." State Rep. Phil King (R-Weatherford)
  • "Now, more than ever, Texans need to work together to conserve energy and to make more efficient use of the energy we consume. The TexasIsHot.org website is an extraordinary resource for people who want to save money and help conserve our precious natural resources..." State Rep. Rafael Anchía (D-Dallas)
  • "By partnering with the TexasIsHot Coalition we can extend our effort’s reach, leverage our resources, and ensure that Austin’s energy grid continues to be a test-bed for technologies, products, and services that will transform our state’s energy system." Brewster McCracken, Executive Director, Pecan Street Project
  • "The City of Houston is working harder than ever to make Houston green and energy efficient, but we need the help of every citizen. I would encourage everyone to take a moment to explore the TexasIsHot website to learn what we can all do to make Houston, and the rest of Texas, the green and energy efficient example for the rest of the nation." Mayor Annise Parker, Houston
  • "Energy efficiency is one of our top priorities. Partnering with the TexasIsHot Coalition will help us educate citizens and local businesses about energy-efficient practices in order to meet our goal of reducing residential and commercial electric use." Gavin Dillingham, Chief of Sustainable Growth – General Services Department, for the City of Houston
  • "We are excited about the new partnership that the City of Corpus Christi has entered into with the TexasIsHot Coalition. TexasIsHot.org provides a platform to educate policy makers, city employees and citizens on how to save money and help the environment by conserving energy..." Mayor Joe Adame, Corpus Christi
  • "I am excited that the City of Corpus Christi has joined the TexasIsHot Coalition and look forward to working with them to help Texans become smarter energy users. Energy efficiency is by far the best way for people to reduce their bills and help the environment, but we need education and outreach to make this happen." State Rep. Solomon Ortiz, Jr (D-Corpus Christi)
  • "Because of its fast growth and hot summers, Texas has to get smarter about energy conservation. I applaud the efforts of Corpus Christi and TexasIsHot to help businesses and residents reap the benefits of increased efficiency." Senator Juan “Chuy” Hinojosa (D-McAllen)
  • "Energy efficiency is the cleanest, quickest and cheapest way to get smart about energy use, saving both money and the environment. I applaud the TexasIsHot Coalition in their effort to educate Texans about the benefits of energy efficiency..." Luke Metzger, Director, Environment Texas
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