Radiant Barrier is a great way to keep your home energy costs down. This is something every Texas homeowner needs to think about getting for their home.
You can either get the Radiant Barrier Spray and Radiant Barrier Foil.
Both the spray and the foil "Reflect" radiant heat. The spray type can reflect up to 75% and the Foil type will reflect about 97% of the heat. Foil is actually the best radiant barrier. You can do-it-yourself if you have handyman skills and can handle the heat in the attic for an extended amount of time. Foil is considered the best and most cost effective way to go whether you staple it to the rafters or lay out radiant barrier over the pre-existing insulation. You can google "radiant barrier" to find detailed installation instructions.
Spray-On Radiant Barrier
Spray-On Radiant Heat Barrier is basically a "liquid foil". As you know, foil is a heat barrier. Thre are many brands of paint and have different performance characteristics. The best are water-based low-e paint called HeatBloc 75 made by STS Coatings or Radiance e.25. made by BASF. It CAN be a good product if installed correctly. However, foil is known for out performing radiant barrier spray paint.
Radiant Barrier Foil The radiant barrier foil actually blocks over 95% of the radiant heat (better than the spray type) and can be fairly easy to install in some homes.
A radiant barrier will act like a mirror and reflect the heat away just like a sunscreen in your car. A radiant barrier saves you money on your summer electric bill and can usually pay for itself in between 2-5 years. So basically a radiant barrier will act like shade for you home. This means less heat gain into your living space and a cooler, more energy efficient and more comfortable home with lower electric bills. With the rising energy costs, this can save you lots of money over the life of your home.