Attic Insulation Batts Over Blown

If you are upgrading your attic space we blow in insulation on top of your batt to achieve desired insulation values.

Attic insulation batts over blown.

The photo above shows an attic insulated with blown cellulose. Loose fill or batt the common term for blanket insulation. If properly done this should not cause a condensation problem in the wall cavity unless you are leaking interior air thru gaps etc. I don t know about that but it s a common insulation material that works much better in the blown form than in batts.

Batt insulation take time to read this column. Both can be added to uninsulated attics or layered over existing material. I bought r 38 faced batts. Batt insulation is available at home centers and lumberyards.

I don t want to add more blow in insulation. Blown in insulation is then applied over the batt level to fill any voids and gaps around joists and other structures and to increase the level of insulation to recommended levels. How do i lay the batts over the blown in insulation. With the paper face down or up.

Whether you live in a warm weather state as i do or in a cooler northern climate it s hard to stay comfortable and keep your energy bills in check if you don t have adequate insulation in the attic. Blown in insulation requires a professional. Fiberglass comes from what i ve heard one major fiberglass insulation manufacturer call a rapidly renewable resource sand. To install fiberglass batts over existing insulation lay the batts perpendicular to the joists so they do not compress the insulation below.

My attic has very very little existing blown in insulation in between the joists. Before choosing blown vs. For this we use owens corning propink. Can i even do it this way because of the existing blow in insulation as far as moisture getting in between the blow.

A bag of cellulose runs about 11 50 and will cover 36 7 square feet at a. The vapor retarder on top of or between layers of insulation can trap moisture. Any new batt or roll insulation installed over existing insulation in the attic needs to be without a vapor retarder face. For diy attic insulation you ve got two choices.

Click the button to calculate the depth in inches and pounds of total insulation required for this job. In the vapor barrier. I live in chicago and my house is cold. Attic insulation is accomplished with either fiberglass blankets batt or blown in insulation.

Unfaced batt insulation friction fit between studs in walls with poly vapor barrier over walls and ceilings blown in attics with minimum r 40 insulation attention to detail. Cellulose insulation has an average thermal value of r 3 7 so you d need just over five inches to equal an r 19 batt. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.