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D. Metal Gutters and Downspouts: Form, fabricate and install in accordance with the Drawings and as may be <br /> required for Project conditions: <br /> 1. Install gutter flanges directly over roof deck at horizontal eaves and below waterproof underlayment. <br /> E. Waterproof Underlayment: Install at roof eaves and valleys: <br /> 1. Base Bid: Install three (3) rows (nominal 8'-0" wide) waterproof underlayment along horizontal roof <br /> eaves. <br /> 2. Under Alternate Bid: Install waterproof underlayment over entire roof sheathing. <br /> 3. Install three (3) rows waterproof underlayment along roof valleys — one (1) layer centered, and one (1) <br /> additional layer each side. <br /> 4. Apply waterproof underlayment directly to roof deck at horizontal eaves, over metal drip edge. Overhang <br /> edge 1/4 inch. Nail upper edge of sheet every 18 inches. Lap vertical and horizontal edges minimum six <br /> inches (6"). <br /> F. Felt Underlayment: <br /> 1. Roof Slopes 4:12 or Greater: Install one (1) layer of felt underlayment over entire roof, perpendicular to <br /> stope of roof. <br /> 2. Roof Slopes Less than 4:12: Install two (2) layers felt underlayment over entire roof in accordance with <br /> Building Code. <br /> 3. Lap minimum six inches (6") over waterproof underlayment. Lap minimum six inches (6") over both sides <br /> of hips and unvented ridges. Secure felt to deck with sufficient fasteners to hold in place until shingles <br /> are installed. <br /> G. Weather lap and seal watertight with plastic cement items projecting through or mounted on roof. Do not <br /> allow solvent based cements to contact waterproof underlayment. <br /> H. Metal Flashing: Form flashing to profiles shown on the Drawings, and as required to protect roofing materia�s <br /> from physical damage and to shed water: <br /> 1. Form sections square and accurate to profile, in maximum possible lengths, free of distortion and defects <br /> detrimental to appearance or performance. <br /> 2. Valley Flashing: Install continuous piece of exposed valley flashing, centered on valley: <br /> a. Extend valley flashing minimum 12 inches under shingles, each side <br /> b. Lap ends minimum four inches (4") <br /> c. Expose valley flashing four inches (4") at ridge and uniformly wider at rate of 1/8 inch/foot down slope <br /> to eave. <br /> 3. Step Flashing: <br /> a. Fabricate shingle tins; seven inches (7")x minimum ten inches (10"); bent in half <br /> b. Nail each tin to roof deck at top edge with two (2) roofing nails. Do not nail tins to wall or chimney <br /> c. Apply shingles over tins, set in full bed of roofing cement. <br /> I. Starter Coarse: Install minimum nine inch (9") wide starter course of mineral roll roofing. Overhang starter <br /> strip 1/2 inch beyond edge of inetal drip at eaves and rakes. Fasten three inches (3") from bottom, using <br /> shingle nailing pattern. <br /> J. Shingles: Install in accordance with manufacturer's recommendations, building codes, and the following: <br /> , <br /> 1. Six Inch (6") Diagonal Method (regular pattem): <br /> a. Snap chalk lines as required to insure horizontal and vertical alignment of shingle pattern. Where <br /> applicable, verify length of run (rake edge to rake edge), to insure that alignment does not result in <br /> less than 1/2 tab at right edge. <br /> b. Start first course with full shingle at left edge of roof, bottom of tabs flush with starter strip. Align to <br /> overhang rake edge 1/2 inch. <br /> c. Cut six inches (6") from outside edge of second course and align with overhang at first course <br /> d. Cut 12 inches from outside edge of third course and align with overhang at first course <br /> e. Repeat pattern at succeeding courses, cutting six inches (6") additional from each succeeding row <br /> f. Start 7th course with full shingle at rake edge and align with overhang at first course. <br /> g. Install full shingles across roof, repeating pattem up to ridge. <br /> 633 SPECIFICATIONS <br /> Page 43 <br />