| If occupant will allow access from interior, installation through the ceiling is preferred Attic space created by the roof-over will be accessed in accordance with the Single-Family Attic Access SWS If the roof-over does not allow physical access to the roof-over attic, access to the original attic will be gained through roof venting If existing insulation height in the attic is less than the height of the heel plate (original attic), access will be made through the original roof and the original attic cavities will be filled before blowing insulation over the original roof At a minimum, the access holes to the original attic cavities will be sealed to prevent air leakage If existing insulation height is equal to or greater than the height of the heel plate (original attic), the insulation will be installed in the end cavities before blowing on top of the original roof Access to the end cavities will be gained and insulation will be installed At a minimum, the access holes to the original attic cavities will be sealed to prevent air leakage Insulation will not be installed on top of the original roof until the end cavities are insulated and air sealed in original attic If insulation is installed on top of the original roof, it will be installed in accordance with the Single-Family SWS Loose Fill Blown Fiberglass Insulation Installation | 