The sloped ceilings in the 3rd floor of the existing building have very little or no insulation. The floor area of this 3rd floor space is approximately 4,000 square feet. The existing sloped ceiling finish is a mixture of wood slats, and drywall over wooden slats. The intent of this project is to increase the R-value of this ceiling assembly and ultimately improve the energy efficiency of the building. 1. Materials a. Cellulose Insulation: Blown-In i. Shall have a minimum R-value of 3.7 at 1 inch thickness when tested in accordance with ASTM C518. ii. Basis of design material is Igloo; Cellulose. Equal substitutions will be considered. 2. Installation a. Contractor shall inspect the attic space above the 3rd floor of the existing building to determine if the rafter bays of the sloped ceiling are accessible from above. If they are, insulation shall be installed from this access point. b. If the sloped ceiling is not accessible from the attic space, installation shall occur by carefully removing the historic ceiling boards and reinstalling them after insulation. If it is absolutely necessary to cut access holes into the historic ceiling material, the holes shall be patched with matching ceiling material and painted to match the existing color. Frequency and location of these access holes shall allow for R-value and density required to be met. Locations of access holes and proposed repairs after completion shall be reviewed and approved by the Owner prior to commencing the work. c. Contractor shall inspect spaces to receive insulation prior to installation to ensure they are acceptable. d. Contractor shall repair access holes after work is completed in a manner that has been approved by the Owner. e. Rafter bays shall be filled 100% with insulation, depth of bays is approximately 6”. f. Installed insulation shall have a settled density of approximately 1.5 lbs per cubic foot. g. Insulation shall be installed in accordance with manufacturer’s written instructions...
