To provide all labor, materials, equipment and anything incidental to. 3.1.1 Removal of existing ballasted roof. 3.1.1.1 Contractor must remove existing ballast rock and dispose of in an approved location on site. Site to be determined by the Director of Maintenance at Mildred Mitchell-Bateman Hospital. 3.1.1.1.1 Contractor must remove and dispose of built-up roof that is underneath the current roofing. 3.1.1.2 Contractor must remove existing roofing system down to concrete decking at a minimum 18,750 square feet equivalent to (187.50 square) of roofing. All measurements on roof size and additional components, i.e.: gutters, downspouts, etcetera are estimates only to be used for the bidding purpose. Vendor will be responsible for verifying all measurements prior to installation and actual needs will be provided, whether it is greater or less than stated. The elevator penthouse is included in this project. 3.1.2 Installation of new ballasted roof. 3.1.2.1 Contractor must mechanically fasten and or use a low-rise foam adhesive, a minimum of 2.5" Polyisocyanurate, or equal insulation, 1/8" slope per foot, fully tapered insulation of the entire roof area. Average R-Value of tapered insulation shall be R-25 at a minimum. Add wood blocking as necessary, at perimeters to maintain a constant perimeter edge height equal to or above the maximum height of tapered insulation. Insulation should be added to the back side of the parapet wall to ensure a smooth transition between the existing masonry wall and the coping stone.
