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1 OHearne Associates: Architecture - Site - Planning P. O. Box 598, Harrisville, RI Fax: OHearneAssociates.com North Smithfield Town Hall 1 Main Street Flashing & Slate Roof Repair Work Scope September 21, 2017 Scope of Work: Also Refer to photos and drawings. Refit and reattach existing coper hip ridge copings. Under Option 1: Preplace copper box gutter lining. Under Option 2: Line existing box gutters with EPDM. Rework/repair right front copper valley connection at box gutter. Repair isolated copper snow guards.

2 MATERIALS Sheet Copper: Sheet copper shall be Revere standard copper for building construction or equivalent. Only domestic materials shall be used when available. Any sheet metal shown on drawings and not otherwise specified shall be 16 oz. cold rolled copper. Sheets shall conform to ASTM specifications B370 or Federal Specification QQ-C-576. Fasteners: Nails used for fastening copper shall be copper or hardware bronze of Stronghold type, or equal, with large flat head. They shall not be smaller than No. 12 Stubs gauge (0.109") and of sufficient length to penetrate roof boarding not less than ¾ Rivets shall be of hard copper, brass, or bronze. Screws and bolts used for fastening copper shall be copper, bronze, brass or stainless steel (passive). Expansion Inserts: Expansion inserts shall be nylon or suitable plastic. Cleats: Cleats shall be 2" wide by about 3" long and shall be made of 16 oz. cold rolled copper, unless otherwise specified. One end shall be locked into seams or into folded edge of copper sheets. Other end shall be nailed with two nails and folded back over nail heads, unless otherwise noted on drawings. When expansion cleats are used, they shall be the same overall dimensions as fixed cleats. Solder: Where used on plain copper, solder composition shall be 50% block tin. Solder shall conform to ASTM specification B32 or Federal Specification QQ-S-571. Flux: Flux shall be muriatic acid killed with zinc, or approved brand of soldering flux. Acid shall be thoroughly washed off after soldering is completed. Synthetic or Rubber Base Sealants: Butyl sealants shall be those conforming to Federal Specification TT-S Use shall be in conformance with manufacturer s recommendations.

3 One part polysulfide sealants shall be those conforming with Federal Specification TT-S-00230C Type II, Class A. Use shall be in conformance with manufacturer s recommendation. One part polyurethane sealants shall be those conforming with Federal Specification TT-S C Type II, Class B. Use shall be in conformance with manufacturer s recommendations. Silicone sealants shall be those conforming to Federal Specification TT-S-00230C Type II, Class & Use shall be in conformance with manufacturer s recommendations. Butyl tape shall be of a type produced and recommended by a reputable manufacturer for architectural copper applications, and shall be used in conformance with that manufacturer s recommendations. Elastic Cement: Elastic cement shall fulfill requirements of Federal Specification SS-C-153. Roofing Felt: Roofing felt shall be saturated with asphalt or pitch and shall have a min. weight of 15 lbs. Per 100 sq. ft. Rosin-Sized Paper: Rosin-sized paper shall be smooth, unsaturated building paper weighing approximately 5 to lbs. per 100 sq. ft. INSTALLATION Surfaces: Surfaces to be covered with sheet metal shall be smooth and free from defects of every description. All such surfaces shall be cleaned of dirt, rubbish and other foreign materials before sheet metal work is started. All projecting nails shall be driven flush with roof boarding. Tinning: Edges of all sheets of uncoated copper to be soldered shall be tinned with solder on both sides for width not less than 1 ½. Soldering: All soldering shall be done slowly with well heated coppers - to heat sheet thoroughly and to sweat solder completely through full width of seam. Ample solder shall be used and seam shall show at least one full inch of evenly flowed solder. Wherever possible, all soldering shall be done in flat Position. Seams on slopes steeper than 45 deg. shall be soldered a second time. Soldering Coppers: Soldering shall be done with heavy soldering coppers of blunt design, properly tinned before using. For flat seam work, and gutters, they shall weigh not less than 10 lbs. per pair except, when gas-heated soldering torch is used, copper itself shall weigh not less than 3lbs. Roofing Underlayment: Surfaces to receive copper roofing shall be covered with roofing felt. Each ply shall lap not less than 2" in the direction of flow and shall be fastened with copper or bronze nails driven through sheet copper washers not less than 1" square. Nails in roofing felts shall be not more than 6 inches apart on all lapped seams.

4 Building Paper: Rosin-sized building paper shall be placed over roofing felts immediately preceding the application of copper roofing. Rosin-sized building paper is omitted for flat seam roofing. FLASHINGS Thru-wall Flashing: Not applicable Stepped Base Flashing: Not applicable Chimney on Roof Slope: Not applicable Chimney Cap: Not applicable On Brick Parapet Walls: Not applicable On Concrete Parapet and Walls: Not applicable Standing Seam Parapet Lining: Not applicable BASE FLASHING Base flashings shall be provided where roofing abuts vertical surface. On built-up roofing: Not applicable Base flashing units shall be made from cold rolled copper in (8') (10') lengths, Maximum length of each unit for 16 oz. copper shall be 16 ft.; for 20 oz. copper, 24 ft. Seams shall be 3/4" locked and soldered. Units shall be joined together with loose-lock seam, 3" wide, filled with sealant before units are hooked together. Loose lock slip joints shall be made as specified under cross folded loose seams. On long straight runs, there shall also be slip joints not more than 8' from any external or internal corner. Straight runs between 20' and 48' in length shall have slip joint at center of run. All seams shall be soldered in flat position. Cleated Edge: Horizontal leg of base flashing shall terminate with 1/2" folded edge. Cleats spaced 8" apart shall be hooked into folded edge with other end nailed to roof deck or wood nailer in roof slab. Over horizontal flange on roof deck a layer of roofing plastic shall be troweled. Into this roofing plastic, strip of fabric shall be embedded. Top strip of fabric shall be similarly applied. (Alternate: First strip of fabric shall be covered with hot pitch into which a top strip of saturated felt shall be embedded.) Top strip shall be surfaced same as adjacent built-up roofing. Nailed Edge: Horizontal leg of base flashing may be nailed along outer edge with copper or bronze nails spaced 3" apart, optional. On other than wood decks, wood nailers shall be provided. Strip horizontal flange into built-up roofing as specified under "cleated edge base flashing." NEW CAP FLASHING: Mot applicable NEW VALLEY FLASHING SYSTEM: Mot applicable NEW COPING COVERS: Not applicable COPING COVER REPAIR: Remove existing fastening pieces. Uniformly straighten the existing coping as much as practical to get them to fit more uniformly and with a greater degree of friction against the copper at the outside edge of the flashing piece. One section of flashing is severely bent. Remove and re-straighten on a brake machine prior to reinstalling. Refasten the piece to the existing wood blocking as sown on the attached diagram. Allow in the bid to replace approximately 30% of the balking which may be rotted.

5 Fascia- Flat Roofs: Not applicable Eave Snow Flashing: Not applicable BUILT-IN GUTTER Scope: Install new copper lining to match profile of existing galvanized. Lock into the existing lock seam of the existing copper counter flashing. Paper: Supporting surfaces under copper gutter linings shall be covered with roofing felt. Over this roofing felt, a ply of rosin-sized building paper shall be installed. Gutter Lining: Gutter lining shall be formed of cold rolled copper sheets conforming closely to profile of gutter. There shall be no longitudinal seams. If sectional contour of gutter is more than 36", cross seams shall be spaced 36" apart. If sectional contour is 36" or less, gutter lining may be formed of copper sheets in 8' or 10 lengths. Gutter linings constructed of 16 oz. or 20 oz. cold rolled copper shall have ends joined together by 3/4" wide locked and soldered cross seams. For copper linings heavier than 20 oz., ends shall be joined together by 1 1/2" lapped, riveted and soldered cross seams. Rivets shall be copper, 3/16 in diameter with copper burrs under peened heads. Rivets shall be spaced not more than 3" apart, in two staggered rows, with 1/2" edge distance. Hold Downs: Where flat or sloping sections of gutters have widths between 18" and 24", sections shall be held down by brass screws covered with 16 oz. copper cups soldered to lining. Hold downs shall be placed along center of section, spaced not more than 48" apart longitudinally. Flat or sloping sections exceeding 24" in width shall have brass screws spaced not more than 18" apart transversely and 48" apart longitudinally. Where used in wood, screws shall be No. 12 x 3/4" round head brass screws, Where used in stone, similar screws shall be set in expansion shields. Under each screw head, a brass or copper washer, 1/16 thick x 1 1/4" diameter, shall be provided. Holes in gutter lining shall be 1/2" larger than diameter of screw. Connection to Asphalt Shingle Slate or Tile Roofing: Top back edge of gutter lining shall terminate at roof edge in 3/4" loose lock seam and be secured with copper cleats spaced 24" apart. Separate apron strip made of 8' or 10 lengths of 16 oz. cold rolled copper, shall be hooked over top rear folded edge of gutter lining to form 3/4" wide loose lock seam bent down at 45 deg. This apron flashing shall extend up on roof under slate or tile roofing not less than 6" with upper edge folded 1/2" and secured by cleats spaced 24" apart. Adjacent lengths of apron flashing shall be lapped 4". Cant strips, as elsewhere specified, shall be attached to apron flashing. Connection To Copper Roofing: Method A: Where ends of batten or standing seams terminate at edge of roof, top rear edge of gutter lining shall be folded over 3/4" and shall terminate at edge of roof. Top edge of gutter lining shall be secured with copper cleats spaced 2' apart Under each standing or batten seam at roof edge, separate piece of copper, 6" wide x 10" long, shall be placed to hook over folded top edge of gutter lining; it shall be secured to roof deck by nails. Lower ends of copper roofing sheets shall hook over top rear folded edge of gutter lining to form 3/4" wide loose lock seam. Method B: Where ends of batten or standing seams do not terminate at edge of roof, rear edge of gutter lining shall extend up on roof deck under copper roofing sheets at least 6" and terminate in a 1/2" fold - where it shall be attached to roof boarding by copper cleats spaced 24" apart

6 Separate 16 oz. cold rolled copper locking strip, made from 8' or 10' lengths, shall be continuously soldered to gutter lining on roof slope. Lower edges of copper roofing sheets shall be folded 3/4" and hook into lock strip to form 3/4" wide loose lock seam. Gutter at Cornices: Outer edge of gutter linings shall extend over top of cornice and be folded 3/4" to hook over previously placed continuous edge strip. Edge strip shall be made of 20 oz. cold rolled copper in 8' or 10' lengths; ends of each length shall lap 1". Edge strips shall be attached to wood construction with either nails spaced 3" apart or bronze screws spaced 10" apart On stone cornices, edge strips shall be secured with brass screws in plastic inserts spaced 10" apart or (alternately) formed to fit into reglet cut in stone.-edge strip shall be secured by brass screws and expansion sleeves spaced 10" apart and regrets filled with sealant. Expansion Joints: Expansion joints shall be provided midway between all outlet tubes (unless otherwise shown on the drawings); also at exterior corners, and where ends of gutters abut masonry walls. Ends of each gutter section shall be closed with cold rolled copper of same thickness as gutter lining copper and shall be flanged, riveted and soldered to gutter lining. Top edge of gutter ends shall have horizontal flange of 1 1/2" wide for connection to expansion joint cover strip. Expansion joint shall have open space - 1" wide between adjacent gutter ends, 1/2" between gutter end and adjacent wall. Cover strip, formed from 16 oz. cold rolled copper, shall be provided over expansion joint and shall be loose locked into horizontal flanges at top of gutter ends. Loose lock joints shall provide for gutter lining movement of 1/2" in either direction. Where ends of gutter abut masonry wall, there shall be 1/2" open space between gutter end and masonry wall - and cover strip shall extend under counter flashing built into masonry. Ends of cover strips shall so terminate to provide watertight connections and permit freedom of movement of gutter lining. L-type water diversion baffle shall be soldered across top of cover strip on line with centerline of gutter. HUNG MOLDED GUTTERS: Not applicable Outlet Tubes: Outlet tubes that connect to outside leaders or downspouts shall be formed of 16 oz. cold rolled copper, with locked and soldered longitudinal seam. Upper end of tube shall be flanged 1/2" and soldered to gutter lining. Tube shall extend into leader at least 3". Strainers: Strainers shall be provided at all outlet tubes. They shall be wire basket type formed of No. 14 B&S gauge copper wire, or cast bronze, and shall fit snugly in outlet tube. BUILDING EXPANSION JOINTS Not applicable. Snow Guard: Re-secure below slate with adhesive. Isolated Slate Replacement: Submit replacement slate to match existing for review and approval. To cover the event that an exact match is not achievable, include in the base bid the provision the harvesting of existing slate from the left side roof toward he rear, and replacing those along a uniform line along the roof edge with the new slate for aesthetic reasons. Carefully remove broken or cracked existing slate or missing slate. Base bid on 6 such locations. Work with surrounding slate to achieve the clearance necessary to slide the new slate up into position and to fasten. The Contractor shall include in the bid the labor and materials to replace

7 slates that may be broken during this process which could involve several slates per slate repair. Include in the bid the same harvesting operation. Copper Valley Repair: Repair the bottom of the copper valley at its termination at the box gutter at the front left side of the roof. Re-work existing copper and add slip sheet of copper under the direction of the water flow to close the gap. End

8 Photo #1: Existing Box Gutter

9 Photo #2: View of right half of the building copper hip ridges: Typical existing copper valley:

10 Photo #3: Typical copper hip ridge: Drawings are attached.

Slate Shingle Specifications

Slate Shingle Specifications California Slate is a proud member of the Slate Roofing Contractors Association of North America, Inc. (SRCA) which publishes Section 07310 Slate Shingles setting forth architectural