The most affordable way to keep your home comfortable is to install insulation in your attic. We make this easy with our EcoTouch® PINK® FIBERGLAS™ Batts & Rolls . For maximum energy efficiency, we recommend about 18 inches of insulation for attic floors (to find out how much insulation you need, use our Insulation Calculators). If your joist cavities are completely filled, lay the new insulation in long runs perpendicular to the joists, and use leftover pieces for small spaces. Remember to keep insulation 3” away from recessed lighting fixtures and from any metal chimneys, gas water heater flues or other heat-producing devices.