The recommended ceiling insulation level for most attics is r 38 or about 12 to 15 in.
How to properly insulate an attic ceiling.
To meet all three goals insulating your finished attic ventilating the roof and maximizing headroom use a combination of dense batt insulation rigid foam sheeting and air chutes.
If only the living space will be insulated wrap the insulation around the room s walls and ceiling and then continue along the floor of the non living space.
Ensure ends of insulation are butted together and flush to underside of framing.
Insulating a finished attic there are two basic ways to insulate a finished attic.
Typical ceiling insulation involves spreading either loose fill or batt the term commonly used for blanket insulation within the attic or airspace of a home.
Lay the batts across the ceiling joists covering the existing insulation.
Plan to pull up the flooring and layer new insulation on top of the old.
Use the insulation calculator to plug in your zip code lifestyle factors building design energy costs and budget to get a detailed recommendation.
Ensure insulation extends to the outside edge of the exterior top plates and is flush against any ventilation dams baffles.
Set up a stepladder tall enough to work comfortably from.
Most codes require a specified minimum amount of headroom and it s tough to meet this requirement when insulating a finished attic especially since most codes require insulation equal to r 38 or more.
From the drywall depending on the insulation type.
Your home needs at least some type of insulation to keep the interior temperature of your home regulated regardless of the specific climate you live in.
The standard width for joists is 24 inches.
While wearing dust mask and gloves carry r 38 batts of unfaced fiberglass insulation into the attic.
Friction fit insulation snugly between and parallel to all standard and narrow attic framing members.
Because the simplest and cheapest way to insulate an attic is to add material to the floor.