Sorry, but I put it hear because there is much opinion for and against the use of radiant barrier insulation. Feel free to move it to home improvement. But distributors of the insulation claim a 30% savings, but the opinion here is much less. Isn't that debunking the distributors claims.
My house is hip construction, wood roof with shingles, installed over R32 blown insulation. I live in Pensacola, Florida. I want to stay cooler in summer at a lower cost.