METHOD SPECIFICATONS, ROOF REPLACEMENT AT THE LOG COLLEGE MIDDLE SCHOOL. CENTENNIAL SCHOOL DISTRICT: 1.0 ROOF REMOVAL / METAL AND PLYWOOD DECKS: 1.1 No more roof area than can be made into a watertight condition will be removed in a single day. Set-up area is shown on the drawings. 1.2 Contractor will have trucks or dumpsters available for removal of debris. Roof debris will not be stored on the roof or on adjacent roof areas. 1.3 Roof removal will not be started unless materials are on site for installation of new roof. Existing roof systems will be removed to the metal and plywood decks. 1.4 Removal: a. Metal - Where the existing roof system will be removed to the steel deck, repair defects as required. Flutes of the steel deck will have any water removed and flutes will be examined for rust. Where rust is found, the deck will be treated with Red Oxide Primer applied at 300 square feet per gallon. Primer will be allowed to dry. Any steel decking that is rusted through will be called to the attention of the Project Coordinator. Areas of heavy scaling rust will be wire brushed prior to application of primer. Unattached steel decking will be re-secured with Tek-3 screws. b. Plywood Deck - The existing roof system will be removed to the plywood deck. The wood deck will be examined. Any wood decking found to be deteriorated will be brought to the attention of the Project Administrator. Replacement of wood decking will be done with CDX plywood lumber of similar configuration and correct thickness to match existing plywood deck. Cost for plywood replacement shall be based on ¾ CDX. Check all supports and replace or reinforce where necessary. 1.5 Obsolete equipment removal will require repair of any voids in the deck the same day. Barricades will be securely placed around the decking voids and will be at least four feet high and clearly marked "Danger". Barricades will be positioned immediately after removal of equipment. 1.6 Old roofing, insulation and debris will not be thrown into trucks or dumpsters but placed within chutes or other conveyance to ground. Tarpaulins will be used to protect the building elevations from dirt and dust contamination. 88
1.7 Drains will be plugged during tear-off operations and re-opened the same day. Drains will not be plugged over night. Any drains that are plugged or nonfunctioning will be brought to the attention of School District s Representative. 1.8 Due to concurrent operations below roof areas, all precautions must be taken to insure a watertight condition. Contractor will provide emergency telephone number to the School District s Representative. 2.0 SKYLIGHT REMOVAL: Detail #D-SK-160 2.1 Designated skylights on Roof Areas 10, 11 and 12 will be removed. The skylights to be removed are shown on the drawing in red. 2.2 Obsolete equipment removal will require repair of any voids in the deck the same day. Barricades will be securely placed around the decking voids and will be at least four feet high and clearly marked "DANGER". Barricades will be positioned immediately after removal of equipment. All workers within six (6) feet of the openings in the deck will observe all OSHA Fall Protection Standards. Contractor must be in compliance with OSHA "Fall Protection" Standard, Subpart M (1926.500) that became effective February 6, 1995. OSHA approved safety harnesses and warning lines must be utilized at all openings in the deck. 2.3 Abandoned skylights will be carefully removed from the roof. Do not drop heavy objects on the existing roof membrane. 2.4 Suspected areas of deteriorated decking will be brought to the attention of the School District s Project Manager. Material should not be stored on roof where decking is suspect. 2.5 During demolition, inside of building under the skylight removal points, must be protected from falling debris. This may be accomplished by the use of the interior protection system. 2.6 The openings in the structural decking will be overlaid with new 22 gauge painted decking. Color of paint will be selected by the School District. New decking will be secured to existing decking with Tek-3 screws spaced every six (6) inches on center. 89
2.7 New metal decking will overlap onto existing metal decking by at least 12.0 inches. New metal decking will be secured to the existing metal decking with approved fasteners spaced every 6 inches on center. 2.8 Metal deck fasteners shall be FMRC approved as indicated in the latest edition of the 2012 Factory Mutual Approval Guide and all applicable supplements. 2.9 Once the metal decking is installed the insulation and roof system will be placed over the top. 2.10 The contractor will be responsible to remove all dirt and debris left by the removal of the overhead protection. This cleanup will also include the cleaning of the floor by a wet or dry vacuum to minimize dust. Sweeping of the floor by broom or other device is not acceptable. The Owner s Project Manager will make final acceptance of the cleaning. 3.0 POLYETHYLENE SHEETING: 3.1 Since the new roofing system will be installed in hot applied asphalt, one layer of 6-mil polyethylene sheeting will be installed across the surface of the metal decking. 3.2 Sheeting will be loose laid. Seams in sheeting will be taped with duct tape or equal. 4.0 VAPOR BARRIER / ROOF AREA 1: 4.1 The surface and flutes of the metal decking must be cleaned using compressed air, vacuum equipment or hand/power brooms to remove dust, loose dirt or debris. 4.2 All blocking and cants will be installed at edges, curbs, pitch pockets and supports as required by detail specifications. Project work will only be performed in areas to receive roofing system the same day. 4.3 Insulation to be used: a. The metal deck will be covered with a ½ layer of Primed GAF Securock insulation. 90
4.4 Securement Metal Decks: a. Metal Decks: Mechanically fasten all layers of insulation, to the metal deck, with Buildex Roofgrip #12 fasteners and 3 inch disc through the metal deck. Fasteners must penetrate the metal deck by at least 3/4 inch. b. FM I-90 approved fastening pattern for insulation: Field: Perimeter Corners - 1 fastener per every 2.0 square feet - 8 fasteners per 4' x 4' board - 16 fasteners per 4' x 8' board - 1 fastener per 1.5 square feet - 21 fasteners per 4' x 8' board - Perimeters are 8 feet. - 1 fastener per 1.0 square feet - 21 fasteners per 4' x 8' board - Corners are 8 feet x 8 feet 4.5 Install no more insulation than can be covered with the vapor barrier the same day. 4.6 Insulation panels will have joints staggered. Gaps between panels of insulation will not exceed 1/8 inch at wood blocking and joints in the field of insulation will be tight. Panels with broken corners, damaged facers or wet panels of insulation will not be used. 4.7 Securock insulation will be either pre-primed or will be primed in the field with an approved quick drying asphalt primer. 4.8 Plastic shipping wrappings on new insulation will be removed at time of site delivery and insulation will be covered with tarpaulins. 4.9 Due to thickness of insulation, insulation panels will need to be pressed in place and cut to contour of roof area. 4.10 VAPOR BARRIER: a. The insulation will be swept of all dust, dirt and debris. 91
b. Penetrations though the deck for vents, pipes, or joints in the deck construction will be sealed up to prevent any water, bitumen or other materials from penetrating into the building. Construction joints should be filled with closed cell joint backing and Pressure Sensitive Tape should be placed over the joint. The Pressure Sensitive Tape will extend a minimum of two inches on each side of the joint and be sealed with Lap Sealant. c. Beginning at the low point of the roof, fully torch weld one (1) ply of GAF Ruberoid SBS Heat Weld Granule, lapping sides a minimum of 3.0 inches and ends a minimum of 4.0 inches. d. Starting at the low point, torch one ply of the GAF Ruberoid SBS Heat Weld Granule membrane. Completely remove the roll wrapping tape before membrane installation. The first roll of the Torch Granulated membrane is unrolled completely and aligned. Remaining rolls shall be unrolled approximately halfway in order to properly align the 5 inch side laps and ensure the 6 inch end laps are maintained. e. Torch apply the rolled portion of the Ruberoid SBS Heat Weld Granule membrane by passing the flame of the torch evenly across the face of the roll. Heat the membrane with the torch until it develops a sheen or glossy appearance. Apply heat to the seam area of the previously installed sheet as well. The welding temperature is usually correct when a flow of bitumen approximately 1/2 inch wide is seen coming from the side lap (do not feather or trowel side laps). Roll up the unadhered half of the membrane sheet and repeat the above procedure to complete the installation of the roll. f. Each ply shall be pressed (broom or squeegee) into place to assure total adhesion and that the ply is free of air pockets, wrinkles, fishmouths, or open laps. g. The Vapor Barrier will extend up the perimeter walls to the location where the existing single ply membrane has been removed. h. At the end of each day's work, install water cut-offs anywhere moisture could enter the assembly. Remove cut-off before resuming work. 92
i. Before leaving the job site all laps will be probed with a cotter pin puller. Open laps, fishmouths or mole runs must be sealed every day. Re-heat sheet and press into position of cover opening with two plies of reinforcing fabric centered over the opening. Fabric will be comprised of a 6 inch and 12 inch layer set in and top dressed with asphalt mastic. j. When flashings are not immediately installed, strip edge of membrane with reinforcing fabric and vertical grade mastic to seal out moisture. k. Before torch application begins, all wood surfaces will be covered one (1) ply of the self-adhered base sheet. 5.0 INSULATION: 5.1 The surface of the vapor barrier and metal decking must be cleaned using compressed air, vacuum equipment or hand/power brooms to remove dust, loose dirt or debris. 5.2 All blocking and cants will be installed at edges, curbs, pitch pockets and supports as required by detail specifications. Project work will only be performed in areas to receive roofing system the same day. 5.3 Insulation to be used: a. Roof Area 1 Tapered polyisocyanurate insulation as manufactured by GAF. Minimum thickness will be 1 ½ inches at the drains with a slope of 1/8 inch per foot. Tapered crickets will be installed at areas designated on the drawing. See enclosed Taper Drawing for details. b. Roof Area 9 Tapered polyisocyanurate insulation, minimum thickness of 1 1/2 inches at the interior drains. Slope of taper will be 1/8 inch per foot. Tapered crickets will be installed at areas designated on the drawing. See enclosed Taper Drawing for details. c. Roof Areas 2, 3, 5, 6, 8, 10, 11 & 12 3.3 inches of polyisocyanurate mechanically fastened to the deck. d. Elevator Penthouse on Roof Area 10 - Tapered polyisocyanurate insulation, minimum thickness of 1 1/2 inches at the edges of the roof. Slope of taper will be 1/8 inch per foot. e. Crickets will be installed on Roof Areas 1, 2, 5 and 9. Crickets will be polyisocyanurate insulation with a slope of ¼ inch per foot. 93
f. Over the polyisocyanurate insulation and crickets, all roof areas, install one layer of 1/4 Primed Securock insulation as manufactured by U.S Gypsum. 5.4 Securement Vapor Barrier (Roof Area 1): All layers of insulation will be installed in solid applications of Oly-Bond 500 Adhesive. Review the roofing insulation plan. Polyisocyanurate insulation boards cannot be larger than 4 feet x 4 feet. Multiple layers of boards should use the staggered joint method of application. Compatible insulation other than polyisocyanurate can be 4 feet x 8 feet maximum size. A. Product Installation: 1. Using PaceCart 2: a. Install Part 1 and Part 2 components following instruction on Bagin-Box package. b. Open flow valves on the dispenser completely and turn machine on. This allows adhesive to be pumped at a 1:1 ratio through the disposable mix tip and onto the substrate in a semi-liquid state. c. Apply fluid mixture in ¾ to 1 inch wide wet beads spaced maximum of 12 inches on center that spreads in excess of 2 inches wide while rising ¾ to 1 inch. d. Lay insulation board into place and walk-in to assure complete adhesion. Curing typically occurs in 4 to 8 minutes depending on temperature and weather conditions. e. Check with roof system manufacturer for project specific spacing requirements. 2. Using SpotShot Applicator: a. Attach the disposable mix tip to the top of the SpotShot tube. Insert the tube into SpotShot dispensing tool and dispense onto the substrate. Apply fluid mixture in rows spaced maximum of 12 inches on center that spread to several inches wide while rising ¾ to 1 inch. b. Lay insulation board into place and walk-in to assure complete adhesion. Curing typically occurs in 4 to 8 minutes depending on temperature and weather conditions. c. Check with roof system manufacturer for project specific spacing requirements. 94
B. Typical Application Rates: Application rates vary depending on surface roughness and absorption rate of the substrate. Typical coverage rates for OlyBond500 dispensed through the PaceCart 2 are 10-20 squares per 10 gallon Bag-in-Box sets. Typical coverage rates for OlyBond500 SpotShot dispensed through applicators is 4-6 squares per case (4 sets of 1500 ml cartridges). All coverage rates are based on 12 inch on center maximum spacing. See chart below for typical application rates on specific substrates. Application Rates (Bag-in-Box Dispensed from PaceCart2) Typical Coverage Squares/Gallon Insulation to Concrete 1.7 to 2 Insulation to Insulation 1.7 to 2 Insulation to Smooth Bur 1.5 to 1.7 Insulation to Modified Bitumen 1.5 to 1.7 Insulation to Gypsum 1 to 1.2 Insulation to Lightweight Concrete* 1 to 1.7 Insulation to Wood 1.7 to 2 Insulation to Cementitious Wood Fiber 1 to 1.2 Insulation to Steel 1 to 1.2 * Coverage rate may vary substantially based on the absorption rate and/or the surface conditions of the LWC. C. Reaction Time: It is important to monitor the speed of the reaction in relation to the temperature (substrate and ambient) at time of application to ensure a complete reaction. Note the charts below for correct Part 2 component selection: Typical Reaction Time Characteristics A. 5 Gallon Bag-in-Box Packaging Temperature Part 2 Formula Tack Free Time (minutes) 40 F+ R 3-5 10-12 B. 1500 ml SpotShot Cartridges Temperature Part 2 Formula Tack Free Time (minutes) Set Up Time (minutes) Set Up Time (minutes) 0 F-40 F W 3-4 10-12 40 F+ R 3-5 10-12 95
Important: When applying OlyBond500, board stock must be placed into the adhesive shortly after it has reached its maximum rise while it is still wet and tacky and before it reaches its tack free state. 5.5 Securement Metal Decks (Roof Areas 2, 3, 5, 6, 8, 9, 10, 11 & 12): Metal Decks: Mechanically fasten all layers of insulation, to the metal deck, with Buildex Roofgrip #12 fasteners and 3 inch disc through the metal deck. Fasteners must penetrate the metal deck by at least 3/4 inch. FM I-90 approved fastening pattern for insulation: Field: Perimeter Corners - 1 fastener per every 2.0 square feet - 8 fasteners per 4' x 4' board - 16 fasteners per 4' x 8' board - 1 fastener per 1.5 square feet - 21 fasteners per 4' x 8' board - Perimeters: a. Roof Areas 2 = 7 feet. b. Roof Areas 3, 6, 8, 9 & 12 = 4 feet. c. Roof Area 5 = 6 feet. d. Roof Area 10 = 11 feet. e. Roof Area 11 = 18 feet. - 1 fastener per 1.5 square feet - 21 fasteners per 4' x 8' board - Corners: a. Roof Areas 2 = 7 feet x 7 feet. b. Roof Areas 3, 6, 8, 9 & 12 = 4 feet x 4 feet. c. Roof Area 5 = 6 feet x 6 feet. d. Roof Area 10 = 11 feet x 11 feet. e. Roof Area 11 = 18 feet x 18 feet. The Contractor has the option of mechanically fastening all layers of insulation to the metal deck or fasten the first layer and install upper layers in Oly-Bond 500 Adhesive. 5.6 Install no more insulation than can be covered with new roofing membrane the same day. 96
5.7 Insulation panels will have joints staggered. Joints in top layer of insulation will be a minimum of 6 inches away from joints in bottom layer of insulation. Gaps between panels of insulation will not exceed 1/8 inch at wood blocking and joints in the field of insulation will be tight. Panels with broken corners, damaged facers or wet panels of insulation will not be used. 5.8 Compressive strength of isocyanurate insulation will be a minimum of 20 psi. 5.9 Securock insulation will be either pre-primed or will be primed in the field with an approved quick drying asphalt primer. 5.10 Plastic shipping wrappings on new insulation will be removed at time of site delivery and insulation will be covered with tarpaulins. 5.11 Isocyanurate insulation must meet Factory Mutual approval for a Class 1 roofing construction per FMRC Standard 4450/4470, Federal Specifications HH-I- 1972/GEN, BOCA section 2002.0, ICBO section 1713 and SBCCI section 717. 5.11 Due to thickness of insulation, insulation panels will need to be pressed in place and cut to contour of roof area. 6.0 ROOFING SYSTEM / ROOF AREAS 1, 2, 3, 5, 6, 8, 9, 10, 11 & 12: 6.1 The surface of the insulation shall be clean and free of debris. 6.2 Apply one (1) layer of CI Base Sheet into the No-Smell Type IV Hot Asphalt by Continental Materials Inc., at approximately 26 lbs., per 100 square feet, over the newly installed insulation. 6.3 The properly heated Type IV asphalt (ASTM D-312) should be poured from a suitable container or applied with a mop just ahead of the membrane to form a pool of bitumen into which the membrane will be rolled. Asphalt must be mopped so as to extend beyond both edges of the sheet. The roll of membrane should push a puddle of asphalt ahead of it with no voids. Care should be taken not to induce stretch into the membrane. Care should also be taken not to trap air under the membrane. The amount of asphalt should be sufficient for excess asphalt to squeeze out along the edges of the membrane, approximately 30 pounds per 100 square feet. Repeat the procedure with the other half of the strip. 6.4 Extend all plies above the top edge of cant strips along the bases of parapets, gravel stops, walls, and projections. Air Seals at blocking will be required where positive air pressure exists. Seals will be formed with approved Sealant, Closed Cell joint backing or a combination of materials. 97
6.5 Felts will be broomed into place during hot application. Brooming will be done from the side and foot traffic will not be allowed over freshly applied plies. 6.6 Immediately following the application of the CI Base Sheet, install one ply of the following: a. Roof Areas 1, 2, 5, 6, 8 & 9 StressPly Plus Mineral with Sunburst. Minerals. b. Roof Areas 3, 10, 11 & 12 StressPly E Smooth. Modified membrane will be installed into the Type IV Hot Asphalt at approximately 26 lbs., per 100 square feet. 6.7 Lap seams in the base ply should not coincide with the laps of the cap sheet. The courses should be staggered to ensure this. 6.8 Each ply shall be pressed (broom or squeegee) into place to assure total adhesion and that the ply is free of air pockets, wrinkles, fishmouths, or open laps. 6.9 The total membrane system must be completed at one time. Phase construction is not permitted unless otherwise directed by the Manufacturer. 6.10 At the end of each day's work, install water cut-offs anywhere moisture could enter the assembly. Remove cut-off before resuming work. 6.11 When flashings are not immediately installed, strip edge of membrane to seal out moisture. 6.12 At all intersections of the plane of the roof, walls, curbs or other raised edges, install cant or tapered edge strips. Extend roofing felts to the top of the cant but not more than two (2) inches above. At flat or raised edges, extend felts to the edge of the building, installing a felt envelope as required. 6.13 Surfacing: a. Roof Areas 1, 2, 5, 6, 8 & 9 - Areas of bleed-out or excess bitumen flow will be coated with additional Sunburst Minerals to present a neat clean appearance. 98
b. Roof Areas 3, 10, 11 & 12 - When no further construction traffic is expected and the roof membrane is clean and dry, apply cold applied modified coal tar pitch poured at 5 gallons per 100 square feet and promptly cover with clean and washed smooth roof pea gravel at the rate of 450 pounds per 100 square feet. Gravel will be dry and applied immediately for proper embedment into flood coat. Gravel will be tan in color. 7.0 ROOFING SYSTEM / ROOF AREA 4: 7.1 The existing roofing and flashing systems will be removed to the plywood decking and vertical sides. 7.2 The plywood will be swept of all dust, dirt and debris. Deteriorated decking will be brought to the attention of the Project Manager. 7.3 Seal plywood joints with tape. 7.4 After cleaning of tear-off debris, replacement of damaged wood panels, and sealing of panel joints, install a single ply of HPR SA FR Base Sheet over the decking. Base sheet will be secured to wood decking with ES Products #15 Heavy Duty Buildex Fasteners. Fasteners will be installed 9 inches on center at laps, two rows staggered 18 inches on center, twelve inches from each edge. Base Sheet will have side laps of 4 inches and end laps of 6 inches. 7.5 The Base Sheet will be tightly fitted around deck penetrations and will be sealed after required nailing at penetrations with asphalt mastic. Nailed felt will extend to perimeter wall construction. 7.6 Base Ply Installation: a. Install one (1) ply of HPR SA Base Sheet over the nailed base sheet. Shingle in direction of slope of roof to shed water on each area of roof. b. Lap ply sheet ends eight (8) inches. Stagger end laps twelve (12) inches minimum. c. Extend ply two (2) inches beyond top edges of cants at wall and roof projections and equipment bases. d. Install base flashing ply to all perimeter and projection details. 99
7.7 Modified Membrane Installation: a. The modified surface ply membrane shall then by solidly adhered to the base layers. b. Starting at the low point, unroll the StressPly SA FR Mineral in the desired position. Fold the membrane back onto itself, remove the split back release film from the exposed side and gradually push the membrane into place. Apply even pressure along the entire length of the membrane from center to outer edges to avoid air pockets or wrinkles. Care should be taken to eliminate air entrapment under the membrane. c. Repeat for the other side. After the rolls are in place, apply uniform pressure to the entire roll area using a long handle weighted roller. d. Install subsequent rolls of modified membrane across the roof and down the vertical sides as described above with a minimum of four (4) inch side laps and eight (8) inch end laps. Stagger the end laps. Apply the modified membrane in the same direction as the previous layers but stagger the laps so they do not coincide with the laps of the base layers. e. Where a lap is to be made to the granular surface, vigorously brush loose granules from the surface to be mated and carefully apply HPR SA Modified Adhesive to the granular surface. And allow 5-10 minutes to flash. Join the two surfaces and using a small metal roller or other suitable roller, firmly press into place. Roll edges firmly to ensure positive adhesion. f. Extend membrane two (2) inches beyond top edge of all cants as shown on the drawings. 8.0 TEMPORARY FLASHING: 8.1 All cants and related components shall be in place. 8.2 One (1) Ply of approved waterproof felt will be: 8.2a install temporary flashing a minimum of 4 inches out beyond components and up a minimum of 4 inches beyond top edge of components and cants in approved asphalt at 30 pounds per 100 square feet per ply per mopping. 100
or 8.2b install temporary flashing a minimum of 6 inches out beyond component and up a minimum of 4 inches beyond top edge of components and cants in asphalt mastic at 3/4 pounds per foot per ply. 8.3 No voids will be left in temporary flashing application. Applicator may use additional protection for inclement weather. All damage to temporary flashings will be corrected before roof membrane is installed. 9.0 ENVELOPE WATERSTOP: 9.1 All work related to the termination point of the insulation will be completed before insulation is placed. 9.2 An approved coated base sheet will be: 9.2a install waterstop a minimum of 6 inches under the face edge of insulation and wrapped up face and back a minimum of 6 inches from the face in approved asphalt at 30 pounds per 100 square feet, top dress waterstop with approved asphalt. or 9.2b install waterstop a minimum of 6 inches under face edge of insulation and wrapped up face and back a minimum of 6 inches from the face in asphalt mastic at 3/4 pound per feet, top dress waterstop with asphalt mastic. 9.3 No voids will be left in waterstop application. Applicator may use additional protection for inclement weather. All damage to waterstop will be corrected before roof membrane is installed. WATERSTOP is formed when all plies of Roof Membrane are extended over the turned edge of the envelope. 101
10.0 WALL FLASHING-METAL COPING CAP, Drawing Letter A-A, Details #D-WL-570 & #D-WL-571: 10.1 Existing coping caps and built-up flashings will be removed. Base of Parapet Wall will receive fiber cant. Cant will be installed in continuous spreads of approved adhesive. 10.2 The wall/cant juncture will be examined for air passage. If air flow is present, joint between cant and wall will be sealed with closed cell joint backing and reglet joint sealant. 10.3 All plies of Roof Membrane will be installed and will extend 2 inches over top of fiber cant. 10.4 Existing wood blocking will be removed. Install one layer of Grade A wood blocking to top of parapet wall using proper fasteners to secure wood blocking into place. Fasteners will be installed in two rows, 18 inches on center, in a staggered pattern with two fasteners 2 inches in from the end of each board. 10.5 On the face of the wood blocking, install an 0.050 aluminum extender that will have a 3.0 inch reveal below the bottom of the metal coping fascia. Extender will be fastened to the wood nailer with spiral shanked nails spaced every 12 inches on center. Color of extender will match color of coping cap and it will have a 45 degree drip edge along the bottom edge. Laps in extender metal will be a minimum of 3 inches. 10.6 Over the top of the roofing felts, install one (1) ply of TriBase Ply Flashing Membrane, fully adhered with Flashing Cement or hot asphalt extending four (4) inches beyond the base of the cant and up the face of the wall across the top of the wood blocking. Flashing will be nailed off every 8" on center with approved fasteners 10.7 Over the base ply of Flashing Membrane, install a second ply of StressPly Plus mineral surface Flashing Membrane, fully adhered in the same manner as the first ply. It shall extend six (6) inches beyond the base of the cant an up the wall to the same height as the base ply of Flashing membrane. 10.8 Laps of flashings will be 4 inches. Cold applied flashings will required 3 coarse application and mesh and Silver Flash mastic. 102
10.9 Over the top of the wall, install a new ANCHOR-TITE Coping. Color will be selected by the School District. Coping will be manufactured from 0.050 aluminum and will completely cover the top of the wall. All corners, end caps, miters etc., will be fabricated by Metal-Era. No shopfabricated metal will be allowed on the perimeter of the roofs. Outside and inside fascia dimensions are noted below. Inside Fascia = 3.5 Outside Fascia = 6.0 10.10 Outside edge of treated wood nailers (minimum 2 x 4) shall be aligned flush with or extended slightly past outermost edge of wall. Position roofing membrane up and over the top of the wall and down the outside face of the wall covering the treated wood nailer completely. Allow 1/2 inch excess membrane if necessary. 10.11 Installation: a. Corner Support Clips: Locate and fasten 20 gauge galvanized corner support clips to the nailer with #12 X1 5/8 (41.3 mm) corrosion resistant fasteners furnished by Metal-Era. b. Miter Splice Plates & Anchor Clips: Position the splice plate in the center of the anchor clip. Install the splice plate and anchor clip assembly into each end of the corner. c. Miter: Place the corner assembly into position pressing downward until snap lock occurs. Then secure at the exposed edge of the anchor clips with provided fasteners. d. Coping Sections: Install the coping sections with a 3/8 (9.53 mm) space to allow for thermal expansion. Note: Remove protective film immediately. e. Endcap Anchor Bar and Clips: Locate and fasten 12 wide anchor bar sections using #12 X 1 5/8 (41.3 mm) corrosion resistant fasteners (provided). Locate and fasten 20 gauge galvanized anchor clips to the wall as shown in Metal-Era s Detail A. Anchor clip will hook under the back side of the 12 section of aluminum anchor bar for proper fit. f. Endcap Splice Plates: Remove release paper from top of factory applied sealant strips. Place splice plate onto second anchor clip. 103
g. Endcap: Hook outside of face of endcap over the anchor clip and rotate into place. Engage rear leg onto anchor clips by pressing downward until snap lock occurs. 10.12 Coping system must have a Factory Mutual 1-90 approved wind up-lift design. System shall also have a 170 mph lifetime wind performance warranty. 11.0 FLASHING UNDER COPING CAP, Drawing Letter B-B, Detail #D-WL-540: 11.1 Existing flashings and slip counterflashings will be removed from the wall. 11.2 Base of Parapet Wall will receive fiber cant. Cant will be installed in continuous spreads of approved adhesive. 11.3 The wall/cant juncture will be examined for air passage. If air flow is present, joint between cant and wall will be sealed with closed cell joint backing and reglet joint sealant. 11.4 All plies of Roof Membrane will be installed and will extend 2 inches over top of fiber cant. 11.5 Over the top of the roofing felts, install one (1) ply of TriBase Ply Flashing Membrane, fully adhered with Flashing Cement or hot asphalt extending four (4) inches beyond the base of the cant and up the face of the wall to the top of the wood blocking. Flashing will be nailed off every 8" on center with approved fasteners 11.6 Over the base ply of Flashing Membrane, install a second ply of StressPly Plus mineral surface Flashing Membrane, fully adhered in the same manner as the first ply. It shall extend six (6) inches beyond the base of the cant an up the wall to the same height as the base ply of Flashing membrane. 11.7 Laps of flashings will be 4 inches. Cold applied flashings will required 3 coarse application and mesh and Silver Flash mastic. 11.8 Coping cap will then be installed over the top of the wall as described in Section 10.0 above. 104
12.0 METAL COPING CAPS OVER CONCRETE COPING STONES, Drawing Letters C-C, D-D, I-I & J-J, Details #D-Wl-572 & #D-WL-573: 12.1 Existing flashings will be removed. Existing counterflashing will be cut off flush with wall. Existing metal copings and wood blocking will be removed. 12.2 The area between the bottom of the coping and masonry wall will be filled with Grade A lumber to make the face of the coping square with the deck. Wood will be fastened to the wall with two rows of approved masonry fasteners spaced every 16 inches on center, staggered pattern. One fastener will be located within two inches of the blocking ends. 12.3 On the top of the coping, install Grade A wood blocking a minimum of 1 ½ inches thick. Blocking will be fastened to the coping with approved masonry fasteners spaced in two rows every 18 inches on center, staggered pattern. One fastener will be located within two inches of the blocking ends. Fastener holes will be pre-drilled to avoid cracking of the coping. 12.4 On the face of the wood blocking, install an 0.050 aluminum extender that will have a 3.0 inch reveal below the bottom of the metal coping fascia. Extender will be fastened to the wood nailer with spiral shanked nails spaced every 12 inches on center. Color of extender will match color of coping cap and it will have a 45 degree drip edge along the bottom edge. Laps in extender metal will be a minimum of 3 inches. 12.5 Insulation will butt up tightly to the vertical blocking and a fiber cant will be installed. 12.6 All plies of Roof Membrane will be installed and will extend 2 inches above the top of fiber cant. Membrane will be nailed off on 8 inch centers with spiral shanked cap nails with 3/4 inch round metal discs. 12.7 Over the top of the roofing felts, install one (1) base ply of Tribase flashing membrane, fully adhered in approved vertical grade mastic adhesive or hot asphalt, extending four (4) inches beyond the base of the cant strip and up the face of the wall and over the top of the wood blocking to terminate on the outside face. 12.8 Over the base ply of flashing felt, install one (1) ply of StressPly Plus Modified Mineral Flashing Membrane, fully adhered approved vertical grade mastic adhesive or hot asphalt. It shall extend six (6) inches beyond the base of the cant and up the wall to the same height as the base ply. Flashing will be 105
nailed off on the face of the blocking with cap nails spaced every 12 inches on center. 12.9 Laps of flashings will be 4 inches. Cold applied flashings will required 3 coarse application and mesh and Silver Flash mastic. 12.10 Over the top of the wall, install a new ANCHOR-TITE Coping. Color will be selected by the School District. Coping will be manufactured from 0.050 aluminum and will completely cover the top of the wall. All corners, end caps, miters etc., will be fabricated by Metal-Era. No shopfabricated metal will be allowed on the perimeter of the roofs. Outside and inside fascia dimensions are noted below. Inside Fascia = 3.5 Outside Fascia = 6.0 12.11 Outside edge of treated wood nailers (minimum 2 x 4) shall be aligned flush with or extended slightly past outermost edge of wall. Position roofing membrane up and over the top of the wall and down the outside face of the wall covering the treated wood nailer completely. Allow 1/2 inch excess membrane if necessary. 12.12 Installation: a. Corner Support Clips: Locate and fasten 20 gauge galvanized corner support clips to the nailer with #12 X1 5/8 (41.3 mm) corrosion resistant fasteners furnished by Metal-Era. b. Miter Splice Plates & Anchor Clips: Position the splice plate in the center of the anchor clip. Install the splice plate and anchor clip assembly into each end of the corner. c. Miter: Place the corner assembly into position pressing downward until snap lock occurs. Then secure at the exposed edge of the anchor clips with provided fasteners. d. Coping Sections: Install the coping sections with a 3/8 (9.53 mm) space to allow for thermal expansion. Note: Remove protective film immediately. e. Endcap Anchor Bar and Clips: Locate and fasten 12 wide anchor bar sections using #12 X 1 5/8 (41.3 mm) corrosion resistant fasteners (provided). Locate and fasten 20 gauge galvanized anchor clips to the wall 106
as shown in Metal-Era s Detail A. Anchor clip will hook under the back side of the 12 section of aluminum anchor bar for proper fit. f. Endcap Splice Plates: Remove release paper from top of factory applied sealant strips. Place splice plate onto second anchor clip. g. Endcap: Hook outside of face of endcap over the anchor clip and rotate into place. Engage rear leg onto anchor clips by pressing downward until snap lock occurs. 12.13 Coping system must have a Factory Mutual 1-90 approved wind up-lift design. System shall also have a 170 mph lifetime wind performance warranty. 13.0 WALL / CHIMNEY FLASHING / SLIP COUNTERFLASHING, Drawing Letter E-E, Detail #D-WL-545: 13.1 Abutment Wall Flashing locations will require the removal of the existing flashing material. Existing copper counterflashing will cut off 2 inches below the reglet. A fiber cant strip will be installed at the base of the wall in approved adhesive. 13.2 The wall/cant juncture will be examined for air passage. If air flow is present, joint between cant and wall will be sealed with closed cell joint backing and approved general purpose sealant. 13.3 All plies of Roof Membrane will be installed and will extend 2 inches above the top of fiber cant. Membrane will be nailed off on 8 inch centers with spiral shanked cap nails with 3/4 inch round metal discs. 13.4 Existing metal counterflashing will be cut for installation of approved Flashing. Over the top of the roofing felts, install one (1) base ply of TriBase flashing membrane, fully adhered in approved adhesive or mastic, extending four (4) inches beyond the base of the cant strip and up the face of the wall to a point one inch below the top of the existing counterflashing joint. 13.5 Over the base flashing ply, install one (1) ply of Stressply Plus Mineral Flashing Membrane, fully adhered in approved cold Adhesive. It shall extend six (6) inches beyond the base of the cant and up the wall to the same height as the base ply. 13.6 Laps of flashings will be 4 inches. Cold applied flashings will required 3 coarse application and mesh and Silver Flash mastic. 107
13.7 A termination bar with caulking cup and slotted holes will be installed at the top edge of the two ply flashing system and fastened 8 inches on center with Rawl Mushroom Headed Fasteners. Termination bar will be wiped with approved Cleaner and caulked with full beads of General Purpose Sealant. Sealant will be tooled into place to form a watershed. 13.8 Over the flashing membrane and under the cut counterflashing, install a 16 oz copper slip flashing that will cover the exposed flashing membrane by at least 4.0 inches. Slip flashing will be tucked up under existing counterflashing and will be mechanically fastened to the masonry wall every 6 inches on center with approved fasteners. Fasteners will have Neoprene washers. Bottom edge of slip flashing will have a 45 degree kick. 13.9 Existing counterflashing will have wall joint sealed with 1/2 inch x 1/2 inch application of General Purpose Sealant tooled in place to form a watershed. Application of Sealant will occur after mechanical securement of counterflashing and wipe down of metal with approved cleaner. 14.0 EXISTING COUNTERFLASHING / ROOF AREAS 4 & 6, Drawing Letters F-F & F1-F1, Details #D-WL-550 & #D-WL-560: 14.1 Abutment Wall flashing locations will require the removal of the existing flashing material and termination bars. Existing counterflashing will be raised in order to install the new flashing system. A fiber cant will be installed at the base of the wall. 14.2 The wall/cant juncture will be examined for air passage. If airflow is present, joint between cant and wall will be sealed with closed cell joint backing and approved general purpose sealant. 14.3 All plies of Roof Membrane will be installed and will extend 2 inches above the top of fiber cant. Membrane will be nailed off on 8 inch centers with spiral shanked cap nails with 3/4 inch round metal discs. 14.4 Over the top of the roofing felts, install one (1) base ply of Tribase flashing membrane, fully adhered in vertical grade adhesive or hot asphalt, extending four (4) inches beyond the base of the cant strip and up the face of the wall to a point 1 inch below the existing counterflashing reglet. 14.5 Over the base flashing ply, install one (1) ply of StressPly Plus Modified Mineral Flashing Membrane, fully adhered in vertical grade adhesive or hot applied. It shall extend six (6) inches beyond the base of the cant and up the wall to the same height as the base ply. 108
14.6 Laps of flashings will be 4 inches. Cold applied flashings will required 3 coarse application and mesh and Silver Flash mastic. 14.7 A termination bar with caulking cup and slotted holes will be installed at the top edge of the two ply flashing system and fastened 8 inches on center with Rawl Mushroom Headed Fasteners. Termination bar will be wiped with approved cleaner and caulked with full beads of General Purpose Sealant. Sealant will be tooled into place to form a watershed. 14.8 Existing counterflashing will be lowered back into position. Counterflashing will have reglet joint sealed with 1/2 inch x 1/2 inch application of General Purpose Sealant tooled in place to form a watershed. Application of Sealant will occur after mechanical securement of counterflashing and wipe down of metal with approved cleaner. 15.0 MEMBRANE FLASHING AT BASE OF DUCT WORK / ROOF AREA 4, Drawing Letters G-G/H-H, Detail #D-WL-555: 15.1 Existing membrane will be removed from the plywood duct cover. The base sheet will be installed as described in Section 7.0 above. A fiber cant will be installed at the base of the wall. 15.2 The wall/cant juncture will be examined for air passage. If airflow is present, joint between cant and wall will be sealed with closed cell joint backing and approved general purpose sealant. 15.3 All plies of Roof Membrane will be installed and will extend 2 inches above the top of fiber cant. Membrane will be nailed off on 8 inch centers with spiral shanked cap nails with 3/4 inch round metal discs. 15.4 Over the top of the roofing felts, install one (1) base ply of Tribase flashing membrane, fully adhered in vertical grade adhesive or hot asphalt, extending four (4) inches beyond the base of the cant strip and up the face of the wall to a point 8 inches above the finished roof. 15.5 Over the base flashing ply, install one (1) ply of StressPly Plus Modified Mineral Flashing Membrane, fully adhered in vertical grade adhesive or hot applied. It shall extend six (6) inches beyond the base of the cant and up the wall to the same height as the base ply. 15.6 Laps of flashings will be 4 inches. Cold applied flashings will required 3 coarse application and mesh and Silver Flash mastic. 109
15.7 A termination bar with caulking cup and slotted holes will be installed at the top edge of the two ply flashing system and fastened 8 inches on center with Rawl Mushroom Headed Fasteners. Termination bar will be wiped with approved cleaner and caulked with full beads of General Purpose Sealant. Sealant will be tooled into place to form a watershed. 15.8 Over the flashing membrane install an 0.050 aluminum slip flashing that will cover the exposed flashing membrane by at least 4.0 inches. Slip flashing will have a flat vertical surface of at least 4 inches high and will be mechanically fastened to the plywood wall panels every 6 inches on center with approved fasteners. Bottom edge of slip flashing will have a 45 degree kick. 15.9 The vertical portion of the slip counterflashing will be primed. The self-adhered roofing system will lap onto the primed portion of the counterflashing. Selfadhered membrane will cover all fastener heads. 16.0 SLIP COUNTERFLASHING UNDER METAL WINDOW SILL / ROOF AREA 9, Drawing Letter K-K, Detail #D-WL-565: 16.1 Abutment Wall Flashing locations will require the removal of the existing flashing material. A fiber cant strip will be installed at the base of the wall in approved adhesive. 16.2 The wall/cant juncture will be examined for air passage. If air flow is present, joint between cant and wall will be sealed with closed cell joint backing and approved general purpose sealant. 16.3 All plies of Roof Membrane will be installed and will extend 2 inches above the top of fiber cant. Membrane will be nailed off on 8 inch centers with spiral shanked cap nails with 3/4 inch round metal discs. 16.4 Over the top of the roofing felts, install one (1) base ply of TriBase flashing membrane, fully adhered in approved adhesive or mastic, extending four (4) inches beyond the base of the cant strip and up the face of the wall to a point one inch below the existing window sill flashing, 16.5 Over the base flashing ply, install one (1) ply of Stressply Plus Mineral Flashing Membrane, fully adhered in approved adhesive or mastic. It shall extend six (6) inches beyond the base of the cant and up the wall to the same height as the base ply. 110
16.6 Laps of flashings will be 4 inches. Cold applied flashings will required 3 coarse application and mesh and Silver Flash mastic. 16.7 A termination bar with caulking cup and slotted holes will be installed at the top edge of the two ply flashing system and fastened 8 inches on center with Rawl Mushroom Headed Fasteners. Termination bar will be wiped with approved Cleaner and caulked with full beads of General Purpose Sealant. Sealant will be tooled into place to form a watershed. 16.8 Over the flashing membrane and under the existing window sill, install an 0.050 aluminum slip flashing that will cover the exposed flashing membrane by at least 4.0 inches. Slip flashing will be tucked up under the existing sill metal and will be mechanically fastened to the sill flashing every 6 inches on center with approved sheet metal screws. Fasteners will have Neoprene washers. Bottom edge of slip flashing will have a 45 degree kick. 17.0 METAL COPING CAP OVER CONCRETE WALL PANEL, Drawing Letter L-L, Details #D-WL-574 & #D-WL-575: 17.1 Existing flashings will be removed. Existing copper counterflashings will be cut off flush with wall. Base of Parapet Wall will receive fiber cant. Cant will be installed in continuous spreads of approved adhesive. 17.2 The wall/cant juncture will be examined for air passage. If air flow is present, joint between cant and wall will be sealed with closed cell joint backing and reglet joint sealant. 17.3 All plies of Roof Membrane will be installed and will extend 2 inches over top of fiber cant. 17.4 Along the top of the wall, install one layer of Grade A wood blocking using proper fasteners to secure wood blocking into place. Fasteners will be installed in two rows, 18 inches on center, in a staggered pattern with two fasteners 2 inches in from the end of each board. 17.5 Over the top of the roofing felts, install one (1) ply of TriBase Ply Flashing Membrane, fully adhered with Flashing Cement or hot asphalt extending four (4) inches beyond the base of the cant and up the face of the wall across the top of the wood blocking. Flashing will be nailed off every 8" on center with approved fasteners 111
17.6 Over the base ply of Flashing Membrane, install a second ply of StressPly Plus mineral surface Flashing Membrane, fully adhered in the same manner as the first ply. It shall extend six (6) inches beyond the base of the cant an up the wall to the same height as the base ply of Flashing membrane. 17.7 Laps of flashings will be 4 inches. Cold applied flashings will required 3 coarse application and mesh and Silver Flash mastic. 17.8 Over the top of the wall, install a new ANCHOR-TITE Coping. Color will be selected by the School District. Coping will be manufactured from 0.050 aluminum and will completely cover the top of the wall. All corners, end caps, miters etc., will be fabricated by Metal-Era. No shopfabricated metal will be allowed on the perimeter of the roofs. Outside and inside fascia dimensions are noted below. Inside Fascia = 3.5 Outside Fascia = 6.0 17.9 Outside edge of treated wood nailers (minimum 2 x 4) shall be aligned flush with or extended slightly past outermost edge of wall. Position roofing membrane up and over the top of the wall and down the outside face of the wall covering the treated wood nailer completely. Allow 1/2 inch excess membrane if necessary. 17.10 Installation: a. Corner Support Clips: Locate and fasten 20 gauge galvanized corner support clips to the nailer with #12 X1 5/8 (41.3 mm) corrosion resistant fasteners furnished by Metal-Era. b. Miter Splice Plates & Anchor Clips: Position the splice plate in the center of the anchor clip. Install the splice plate and anchor clip assembly into each end of the corner. c. Miter: Place the corner assembly into position pressing downward until snap lock occurs. Then secure at the exposed edge of the anchor clips with provided fasteners. d. Coping Sections: Install the coping sections with a 3/8 (9.53 mm) space to allow for thermal expansion. Note: Remove protective film immediately. 112
e. Endcap Anchor Bar and Clips: Locate and fasten 12 wide anchor bar sections using #12 X 1 5/8 (41.3 mm) corrosion resistant fasteners (provided). Locate and fasten 20 gauge galvanized anchor clips to the wall as shown in Metal-Era s Detail A. Anchor clip will hook under the back side of the 12 section of aluminum anchor bar for proper fit. f. Endcap Splice Plates: Remove release paper from top of factory applied sealant strips. Place splice plate onto second anchor clip. g. Endcap: Hook outside of face of endcap over the anchor clip and rotate into place. Engage rear leg onto anchor clips by pressing downward until snap lock occurs. 17.11 Coping system must have a Factory Mutual 1-90 approved wind up-lift design. System shall also have a 170 mph lifetime wind performance warranty. 18.0 EXPANSION JOINT DETAIL / ROOF AREAS 9 & 7, Drawing Letter N-N, Detail #D-EX-640: 18.1 A new expansion joint will be installed at the intersection of Roof Areas 7 & 9. Existing joint, blocking and flashing will be removed. Existing roofing on the opposite side of the joint will be cut at the base of the existing blocking. 18.2 Vertical Grade A wood will provide a minimum 8" rise above the finished roof surfaces. At each location, a split treated 4 inch x 4 inch wood cant will be nailed in place. Make sure enough wood blocking is used to accommodate the height of the new isocyanurate insulation. 18.3 The roofing base plies shall be fully adhered in place and shall terminate not more than two inches above the wood cant. 18.4 On both sides of the joint, flashing shall be accomplished using one ply of TriBase flashing membrane and one ply of StressPly Plus mineral surfaced flashing membrane fully adhered in Flashing Bond mastic. The base ply membrane shall be installed from a point 2 inches from the base of the cant and extend to the top of the wood blocking. 18.5 The surface flashing sheet shall then be installed from a point 4 inches from the base of the cant and extend to the top of the wood blocking. 113