Add Blown In Insulation To Attic

Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation.

Add blown in insulation to attic. We include blown in attic insulation pros and cons but we can t recommend blown in fiberglass or cellulose as your best insulating choice. Cellulose is recycled newsprint treated with a fire retardant. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used. The average cost of blown in insulation to achieve an r value of r 38 r 49 is 1 665 with most homeowners spending between 874 and 2 156 or 1 59 per square foot.

Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. Pull the existing insulation away from the roof. To estimate costs for your project. When you need to add insulation to an attic crawl space or walls of a home the fastest and most cost efficient method is to use blown in insulation.

When blown into attics and wall spaces loose fill fiberglass offers an average r 2 5 thermal value per inch the higher the number the greater the insulating effect. Actual costs will depend on job size conditions and options. Create your own price list in homewyse lists for a basic project in zip code 47474 with 500 square feet the cost to install blown in attic insulation starts at 1 08 1 86 per square foot. Blown in fiberglass is considered flame resistant.

Blown in insulation in the attic seal attic bypasses. Most attics are insulated with blown in loose cellulose r 3 5 per inch blown in loose fiberglass r 2 5 per inch or fiberglass batts r 3 2 per inch. Rent a loose fill insulation blower from a home improvement or hardware store. Block all vents in the attic floor with baffles making sure to extend the baffles at least four inches above the.

Fiberglass is just that thin fibers of glass that trap air. Position the new vent chute so the. Materials can be layered for added protection. The negative thing about blown in insulation is that it makes the attic absolutely impassable when you re done and you need a lot more thickness of it because it has more air inside of it than you would if you used fiberglass bats.

Add loose fill insulation to existing loose fill 1. Then feed 1 2 a bag of fill into the machine and turn on the hose to start blowing the insulation. Connect the hose to the insulation machine connect the hose to the blown in insulation machine. Insulation efficiently fills gaps.

Have a friend add material to the hopper. Because blown in insulation which is fiberglass generally can go on top of the existing insulation. Pull back the existing insulation and use expanding spray foam the fire blocking type to seal any.