Rolls of R-13 paper-faced fiberglass insulation are 32 inches long and 15 inches wide. One roll will fill four wall cavities. For every 10 linear feet of walls, plan on buying two, possibly three ...

When It Comes to Insulation, Fluff Your Fiberglass. By JAMES CAREY and MORRIS CAREY . ... Get the kind of insulation that comes in 16- and 24-inch-wide rolls and precut lengths called batt insulation.

Fiberglass insulation is typically sold in batts or rolls designed to fit standard wall and ceiling cavities with framing members spaced 16 or 24 inches apart, on center. The batts' thicknesses ...

Every option—from fiberglass rolls to blown-in cellulose—displays its R-value on the packaging, allowing you to calculate the total R-value reached in a specific area of your home.

Fiberglass insulation is relatively quick and easy to install, ... Flexibility: Fiberglass is available in pre-cut panels, rolls and loose-fill, making it incredibly flexible for installation.

• For large open areas, rolls of fiberglass insulation are likely the easiest and quickest material to use, and its installation is not technique dependent.

Fiberglass insulation is simple to install, but it's not foolproof. ... When glass fibers are woven into a roll or batt, they trap millions of tiny, irregularly shaped air pockets.