Many varieties are less irritating to skin than the fiberglass used several years ago.
Blown fiberglass insulation is often used in walls and attics. Every fall, insulation is one of the biggest sellers at home-improvement centers. Attics, crawlspaces, basement ceilings and exterior walls are the most critical locations for insulation. If you install it properly, insulation could save you 20 to 50 percent on your monthly heating and cooling bills. The most important factor to consider when purchasing insulation is its R-value .