One of the latest green concepts is very controversial and many people have different opinions about the advantages and disadvantages. While the energy savings it can provide are very good the down side is that it could lead to problems. Radiant barriers are quickly becoming the next wave in the green revolution; the barriers are installed on the underside of your roof and prevent the heat from the sun from radiating into your attic. Most attics can reach well above 120 Deg in the summer and some with black shingles can get much hotter. The concept is to install some sort of materials to block the radiant heat from getting into the attic, it also blocks heat losses in the winter. There are several different methods circulating around and each has it’s own pros and cons. Read More... asi-heating-airconditioning.com