Projects that increased a home’s sustainability showed significantly higher recoup cost values and growth in 2013.  Backup power generators ranked 1st in Houston, Austin & El Paso with a 105.1% gain in El Paso in 2013.  Natural materials, such as wood, cement and steel, led to a significantly higher recoup cost than synthetic, plastic-based materials, such as composite and vinyl.  SHOPPING AROUND WILL GET YOUR AN IDEA OF MATERIALS TO USE AND COST AND RECOUPING VALUE.  TAKES HOMEWORK!