[DangeloInspections]

The short answer to your question is adding blown in insulation. Without posting links, etc, I'll simply say that adding a radiant barrier after your home is built is quite costly and almost impossible to do without trampling your existing insulation.

Radiant barriers can easily cost $4000-$5000, not including the cost to reblow more insulation over the trampled insulation. Despite what some contractors may tell you, engineering studies have found that the typical savings gained from this is usually 10-12%. Let's say your total Electric bill is $150 per month. That would be $1800 per year. 12% of that would be $216 per year savings. This equates to a payback time of 23 years......more than most Villages homeowners would be comfortable with.

Now...understand that if you are building a NEW home and use the radiant type roof sheathing DURING the build, this IS a good idea as it is done much more cheaply, does not hurt the insulation, as it is not done as an aftermarket add on.

I think the better option for an existing home is adding more insulation. The typical cost for blown in fiberglas insulation is $75.00 per bag installed. Adding an additional few inches or so can start saving money quite quickly. The typical villages newer home is insulated to R-30. Some other surrounding communities insulate to an R-38. While there is a point where more is not really better, getting to an R-38 is not that expensive, and one would see a payback in a relatively very short time. This would also be much less expensive to do. There are many local insulation contractors that can do this.

Hope this helps!