1. Installation Instructions for Reflectix Inc Single Reflective White Insulation Product consists of one outer layer of 96 reflective film and one outer layer of white poly ethylene bonded to two internal layers of heavy gauge polyethylene bubbles 5 16 thick The product is available in a 48 width Click here for additional product information Pdf Links click on the category below to be directed to detailed application webpages and installation instruction pdfs x M e Metal Building e Post Frame Building