How thick should blown attic insulation be?
Keeping this in consideration, can you put too much insulation in your attic?
But there may be a theoretical point of “too much.” If a home is over-insulated and is too tightly sealed, moisture can get trapped inside. Without proper ventilation, a home can build up too much moisture, especially in the attic (warm air rises), which can cause mold problems and, overall, lower indoor air quality.
One may also ask, how much insulation do I need in the attic? According to the U.S. Department of Energy, it's recommended that attics have an R-38 to R-49, or about 12” to 15” of fiberglass or cellulose insulation. Use unfaced insulation when adding more insulation to an attic that already has some insulation, laying the rolls or batts at right angles to the floor joists.
Hereof, which blown in insulation is best for attics?
The best insulation options for an attic are open cell spray foam, fiberglass, and cellulose.
- Cellulose is the oldest insulation material used for not only the attic, but other areas of the home as well.
- Fiberglass is another traditional insulation material that consists of extremely fine glass fibers.
How thick is r48 insulation?
Compare all Specifications
|Insulation Location Attic||Insulation Location Ceiling|
|Roll or Batt Batt||Roll or Batt Batt|
|Product Length (ft.) 4 ft||Product Length (ft.) 4 ft|
|Faced or Unfaced Faced||Faced or Unfaced Faced|
|Product Thickness (in.) 14 in||Product Thickness (in.) 8.25 in|