Adding Blown In Insulation To Attic

The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.

Adding blown in insulation to attic.

How much does attic insulation cost. We have ac equipment and ductwork in the attic so it needs to be accessed a few times a year at most. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation. If rafter vents are not installed the new blown in insulation will restrict air flow from the soffit vents to the roof vents and as a result the attic space will heat up.

That s really critical because if the attic doesn t breathe that insulation will get humid and damp and not work very well. 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. You can do it yourself for about 500. In the warmer summer months proper attic ventilation keeps the temperature within the attic space lower.

We ll assess the type of insulation you currently have and let you know if adding more insulation to your attic will help keep your home more comfortable. Blown in insulation overview. When adding additional insulation you do not have to use the same type of insulation that currently exists in your. The higher the r value the better the thermal performance of the insulation.

I think 19 inches of batt insulation and 22 inches of blown in insulation is what is recommended for your part of the country. We are considering sealing our attic and adding loose fill blown in fiberglass insulation to the floor. The attic walls and flooring are unfinished. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.

The added cellulose although adding value thermally is still very vapor permeable and will quickly transport interior humidity via infiltration across the pressure plane into the attic space. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used. Give our ambient edge experts a call at 888 247 7475 for an evaluation of your attic space. The pros charge 1 500 to 2 000 to do a 1 200 sq ft.

Add the right kind of insulation. In a cooling climate a good blanket of attic insulation helps keep the house cooler and reduces the load on air conditioning equipment. But make sure make sure make sure gene that you have enough attic ventilation. Blowing attic insulation isn t hard but it s dusty sweaty work.