Rolled Attic Insulation Fiberglass Vs Cellulose

The insulation usually is blended and provides an r value ranging from around 32 to 38 per square foot.

Rolled attic insulation fiberglass vs cellulose. Batt insulation is available at home centers and lumberyards. Assuming your current attic insulation is made from fiberglass and has a value of r 13 you d have to add roughly 10 inches of additional fiberglass to hit r 38. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation. Loosely blown fiberglass alone carries an r value of about 22 to 27 per square foot.

One of the disadvantages to using fiberglass insulation however is its reduced lifespan. You can get to the same place with either material. Or 7 inches of cellulose. Batt insulation take time to read this column.

Before choosing blown vs. If you have questions about blown in vs. Blown in insulation requires a professional. Fiberglass batt or roll insulation r3 2.

Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used. Fiberglass insulation blown in attic r2 2 r4 3. Blown in insulation often is a combination of loose fiberglass and treated cellulose fibers.

When comparing blown in insulation both fiberglass and cellulose are nearly identical in price both costing around 0 70 to 0 80 per square foot for 6 inches of insulation. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. Thankfully this isn t a problem with blown cellulose insulation since it remains in place. Fiberglass insulation and cellulose insulation offer similar r values.

Attic insulation is accomplished with either fiberglass blankets batt or blown in insulation. With blown in insulation you can expect an r value of 2 2 to 2 7 per inch for fiberglass and between 3 2 and 3 8 per inch of cellulose. Fiberglass batts however are less expensive costing on average 0 30 to 0 40 a square foot for 6 inches of insulation. Both cellulose and fiberglass insulation provide about the same level of insulating power or r value per inch with slightly different results based on the installation procedure.