Radiant Barriers - Let Space-Age Technology Lower Your Utility Bills and Increase Your Comfort

Radiant barriers are a relative newcomer to the area of residential insulation. All radiant barriers are based upon space age technology. In 1954 NASA developed this material which we now call a "space blanket". This "sheeting" covered with deposited aluminum helps reduce heat transfer, which is vital in the cold of space. The same technology used by our astronauts has been used in the construction industry for over 20 years and has been receiving more attention in recent years as alternate green building methods have been thrust into the spotlight. Radiant barriers work differently than all traditional forms of insulation.

The most commonly used insulation in the past, and is still frequently used today, has been fiberglass batting, loose-fill blown insulation, spray foam insulation and cellulose. It is possible to add a radiant barrier to an existing house and often recommended. All types of insulation are rated with an R-value, unlike radiant barriers. The R-value is how the manufacturers measure thermal resistance, meaning how well the insulation prevents heat from transferring through the insulation.

Radiant barriers are not assigned an R-value, but two different numbers. The first is an emissivity number. The second number refers to the thermal reflective ability of the barrier. The emissivity, or emittance, refers to how much thermal radiation is given off of the material. The emittance rating will be between 0 and 1. As the emittance rating goes up so does the amount of thermal radiation given. Although related, the second rating is the reflectivity of this insulation. The reflectance rating is also given as a value between 0 and 1 or percentage. These figures, when combined should equal 1 or 100%

While the explanation for the emittance and reflectance ratings is somewhat over-simplified, it is important to pay attention to both numbers. The reflectivity rating should be at least.9, or 90%, while the corresponding emittance rating should be low. These numbers need to be disclosed to the home owner by the manufacturer of the barrier.

While it is quite possible to install a radiant barrier in an attic or crawl space, there are a number of differing methods. The two simplest and most cost effective methods are to secure it to the top side of the roof joists, which support the ceiling, or the bottom of the rafters, which form the slope of the roof. There are particulars, though, to which need to be paid attention.

When installing the radiant barrier on top of the joists, possible condensation during the winter months needs to be taken into account. Most barriers will not allow water vapor to pass through. A simple fix is to make sure the barrier is a perforated one which will allow the barrier to breathe while still being able to reflect the heat away from the ceiling and living quarters below. Another alternative is to verify that the radiant barrier being installed has a substrate which will naturally allow any condensation to pass. The challenge of possible condensation does not apply to the installation of the radiant barrier to the bottom of the rafters. Because of soffit vents along the eaves of the roof or ridge vents, air movement should maintain a condensation free environment.

Radiant barriers used as the sole means of insulation may provide decent results; however, when used in conjunction with existing insulation should enhance the monetary savings of any home owner's monthly utility bill. Due to the region where the home is located, results will vary. Local installers should know which method and what type of radiant barrier will be best for each application.

Go to http://www.utilityimprovements.com for further information.

Article independently authored by Daniel Elliott. The content herein may or may not reflect the views and opinions of Utility Improvements.

Radiant Barriers - Let Space-Age Technology Lower Your Utility Bills and Increase Your Comfort

Radiant barriers are a relative newcomer to the area of residential insulation. All radiant barriers are based upon space age technology. In 1954 NASA developed this material which we now call a "space blanket". This "sheeting" covered with deposited aluminum helps reduce heat transfer, which is vital in the cold of space. The same technology used by our astronauts has been used in the construction industry for over 20 years and has been receiving more attention in recent years as alternate green building methods have been thrust into the spotlight. Radiant barriers work differently than all traditional forms of insulation.

The most commonly used insulation in the past, and is still frequently used today, has been fiberglass batting, loose-fill blown insulation, spray foam insulation and cellulose. It is possible to add a radiant barrier to an existing house and often recommended. All types of insulation are rated with an R-value, unlike radiant barriers. The R-value is how the manufacturers measure thermal resistance, meaning how well the insulation prevents heat from transferring through the insulation.

Radiant barriers are not assigned an R-value, but two different numbers. The first is an emissivity number. The second number refers to the thermal reflective ability of the barrier. The emissivity, or emittance, refers to how much thermal radiation is given off of the material. The emittance rating will be between 0 and 1. As the emittance rating goes up so does the amount of thermal radiation given. Although related, the second rating is the reflectivity of this insulation. The reflectance rating is also given as a value between 0 and 1 or percentage. These figures, when combined should equal 1 or 100%

While the explanation for the emittance and reflectance ratings is somewhat over-simplified, it is important to pay attention to both numbers. The reflectivity rating should be at least.9, or 90%, while the corresponding emittance rating should be low. These numbers need to be disclosed to the home owner by the manufacturer of the barrier.

While it is quite possible to install a radiant barrier in an attic or crawl space, there are a number of differing methods. The two simplest and most cost effective methods are to secure it to the top side of the roof joists, which support the ceiling, or the bottom of the rafters, which form the slope of the roof. There are particulars, though, to which need to be paid attention.

When installing the radiant barrier on top of the joists, possible condensation during the winter months needs to be taken into account. Most barriers will not allow water vapor to pass through. A simple fix is to make sure the barrier is a perforated one which will allow the barrier to breathe while still being able to reflect the heat away from the ceiling and living quarters below. Another alternative is to verify that the radiant barrier being installed has a substrate which will naturally allow any condensation to pass. The challenge of possible condensation does not apply to the installation of the radiant barrier to the bottom of the rafters. Because of soffit vents along the eaves of the roof or ridge vents, air movement should maintain a condensation free environment.

Radiant barriers used as the sole means of insulation may provide decent results; however, when used in conjunction with existing insulation should enhance the monetary savings of any home owner's monthly utility bill. Due to the region where the home is located, results will vary. Local installers should know which method and what type of radiant barrier will be best for each application.

Visit http://www.utilityimprovements.com for additional information on the topic of radiant barrier insulation and saving money on monthly utility bills.


Article independently authored by Daniel Elliott. The content herein may or may not reflect the views and opinions of Utility Improvements.

Tax Credit - Save on Home Improvements and Cut the Monthly Utility Costs With Green Energy Products

With the current government administration and more attention being focused on energy conservation, there are a variety of tax credits available for 2009 and 2010. Surprisingly, not every tax credit is for upgrading and installing newer expensive home appliances such as a residential air conditioner or heat pump. The amount of the credit given varies depending on the cost of the item being installed. Generally, the tax credit applied is 30%. There are currently a plethora of items eligible for these tax breaks. Installing a newer and more efficient HVAC system can be eligible all or in part. One component of the HVAC system may qualify while another component of the same system may not. Almost every HVAC service company should have detailed additional information regarding the tax advantages. Another product area which is eligible for tax breaks and incentives are doors, windows, and insulation. Faulty seals around door and window edges are a major cause of heat loss or infiltration. Replacing existing doors or windows can lower a homeowner's monthly utility bill expenses while still qualifying for a tax credit. Beefing up the attic insulation or crawl space with a radiant barrier can dramatically reduce the heating and cooling bill by preventing much of the warm air during winter from escaping or cool air in the summer. The homeowner should be aware that just because a product states it is an energy star appliance or product does not mean it will qualify for the established tax credits. Most kitchen appliances will not qualify, whereas some types of roofing can yield a good tax credit for the 2009 or 2010 tax years. Other home energy improvements are photovoltaic systems, or solar panels and wind turbines. One key requirement to receiving a tax break with these home improvements is that at least half of the home's energy consumption must come from use of solar energy. There is one caveat. Heating a pool or hot tub with solar energy is not allowed to be factored into the 50% or more energy consumption. Wind turbines, resembling small windmills, convert wind energy into electricity. While green energy sources can be a sizeable investment, the monthly savings and benefits will pay for itself in a relatively short time. Depending upon the location of the home, many areas may or may not permit the installation and use of solar panels or wind turbines due to not fitting within the architectural style of the neighborhood. Slowly this excuse is being pushed aside in favor of greater efficient use of green energy. For more information on reducing energy costs go to http://www.utilityimprovements.com today.



Article independently authored by Daniel Elliott. The content herein may or may not reflect the views and opinions of Utility Improvements.