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Orange County Public Works <br />Roof Asset Management Program <br />Remedial Work -1999 <br />Note: Consideration may be given to the use of fiberglass shingles in lieu <br />of slate should budget constraints be a concern. Shingles can be <br />installed for approximately $26,000 versus the cost for slate. Please note, <br />however, that slate will provide a useful life of approximately 50 years; <br />shingles will provide a useful life of approximately 15 years. . <br />Sector 2 — Built -up Roof (1,400 sq. ft.) <br />A. Removal of the existing built -up roof system including flashing and <br />accessories down to the deck. <br />B. Replacement of damaged or deteriorated wood blocking. New <br />blocking will be required at all roof areas to match the thickness of <br />new insulation. <br />C. Installation of new tapered polyisocyanurate board insulation. <br />Minimum thickness at low points to be 1.5 inch (R- 10.0). <br />D. Installation of a multiple ply modified bitumen membrane roof <br />system including all flashing and accessories. Systems include <br />those manufactured by Siplast, Soprema, TAMKO, and Firestone. <br />System to include manufacturer 20 -year No Dollar Limit Warranty. <br />Consideration may be given to other systems such as single ply <br />depending on budget refinement. <br />E. Installation of new 24 gauge prefinished sheet metal flashing and <br />trim. <br />Subtotal $ 13,090 <br />Contingency — 5% $ 650 <br />Total Preliminary Construction Cost $ 14,740 <br />Sector 3 — Built -up Roof (3,800 sq. ft.) <br />A. Removal of the existing built -up roof system including flashing and <br />accessories down to the deck. <br />B. Replacement of damaged or deteriorated wood blocking. New <br />blocking will be required at all roof areas to match the thickness of <br />new insulation. <br />ENC /fEfi� /rYC� <br />si <br />