Rolled Attic Insulation Fiberglass Vs Cellulose

Blown in insulation often is a combination of loose fiberglass and treated cellulose fibers.

Rolled attic insulation fiberglass vs cellulose.

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. Fiberglass insulation and cellulose insulation offer similar r values. Thankfully this isn t a problem with blown cellulose insulation since it remains in place. One of the disadvantages to using fiberglass insulation however is its reduced lifespan.

Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used. If you have questions about blown in vs. Blown in insulation requires a professional. 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.

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. Fiberglass batts however are less expensive costing on average 0 30 to 0 40 a square foot for 6 inches of insulation. Fiberglass insulation blown in attic r2 2 r4 3. Batt insulation is available at home centers and lumberyards.

You can get to the same place with either material. Batt insulation take time to read this column. 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. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

Or 7 inches of cellulose. Attic insulation is accomplished with either fiberglass blankets batt or blown in insulation. Loosely blown fiberglass alone carries an r value of about 22 to 27 per square foot. It s not uncommon for rolled fiberglass batts to peel away from the wall over time reducing the home s energy efficiency.

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. The insulation usually is blended and provides an r value ranging from around 32 to 38 per square foot. Batt insulation or about insulation removal and or installation for your home or building we re here to help. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.