2- North Clackamas Aquatic Center Reroof spec.pdf

GAF GUIDE SPECIFICATION 4/8/2025

SECTION 07 54 19

THERMOPLASTIC SINGLE-PLY ROOFING

North Clackamas Aquatic Center Reroof

7300 SE Harmony Rd

Milwaukie, OR

PREPARED BY:

GAF Design Services

PROJECT NO: PD-00047631R2

Note: This specification is provided as a general guide for use of GAF products based on typical building conditions and standard roofing practices. This guide specification is not a substitute for professional design services. The information in this guide specification must be reviewed/approved by a design professional and modified as necessary and appropriate for each project. Each project has unique requirements and GAF recommends that the Owner's representative independently verify the accuracy and appropriateness of the specification provided for a particular project. Each selection or deletion made to this guide specification should be carefully considered. Users of this guide specification assume sole responsibility for its use.

GAF GUIDE SPECIFICATION

07 54 19 - 1

PART 1 GENERAL

1.01 SUMMARY

A. Section Includes

1. PVC Single-Ply Roofing Membrane

2. PVC Flashings

3. PVC Accessories

4. Insulation

B. Related Sections

1. Section 06100: Rough Carpentry

2. Section 07620: Sheet Metal Flashing and Trim

3. Section 15430: Plumbing Specialties

1.02 REFERENCES

A. American Society for Testing and Materials (ASTM) - Annual Book of ASTM Standards

1. ASTM D-751 – Standard Test Methods for Coated Fabrics

2. ASTM D-2137 - Standard Test Methods for Rubber Property—Brittleness Point of Flexible Polymers and

Coated Fabrics

3. ASTM E-96 - Standard Test Methods for Water Vapor Transmission of Materials

4. ASTM D1204 - Standard Test Method for Linear Dimensional Changes of Nonrigid Thermoplastic Sheeting or Film at Elevated Temperature

5. ASTM D-471 - Standard Test Method for Rubber Property—Effect of Liquids

6. ASTM D-1149 - Standard Test Methods for Rubber Deterioration—Cracking in an Ozone Controlled

Environment

7. ASTM C-1549 - Standard Test Method for Determination of Solar Reflectance Near Ambient Temperature

Using a Portable Solar Reflectometer

8. ASTM C-1371 - Standard Test Method for Determination of Emittance of Materials Near Room

Temperature Using Portable Emissometers

9. ASTM E 903 – Standard Test Method for Solar Absorptance, Reflectance, and

Transmission of Materials Using Integrating Spheres

10. ASTM G155 - Standard Practice For Operating Xenon Arc Light Apparatus For Exposure Of Non-Metallic

Materials

11. ASTM D573 - Standard Test Method For Rubber - Deterioration In An Air Oven

B. Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA) - Architectural Sheet

Metal Manual

C. National Roofing Contractors Association (NRCA)

D. U.S. Green Building Council (USGBC)

1. Leadership in Energy and Environmental Design (LEED)

E. California Title 24 Energy Efficient Standards

F. ENERGY STAR

G. Cool Roofing Rating Council (CRRC)

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1.03 DEFINITIONS

A. Roofing Terminology: Refer to ASTM D1079 and the glossary of the National Roofing Contractors

Association (NRCA) Roofing and Waterproofing Manual for definitions of roofing terms related to this section.

1.04 SUBMITTALS

A. Product Data: Provide product data sheets for each type of product indicated in this section.

B. Shop Drawings: Provide manufacturers standard details and approved shop drawings for the roof system specified.

C. Samples: Provide samples of insulations, fasteners, membrane materials and accessories for verification of quality.

D. Certificates: Installer shall provide written documentation from the manufacturer of their authorization to install the roof system, and eligibility to obtain the warranty specified in this section.

1.05 QUALITY ASSURANCE

A. Manufacturer’s Qualifications: GAF shall provide a roofing system that meets or exceeds all criteria listed in this section.

B. Installer’s Qualifications:

1. Installer shall be classified as a GAF GoldElite™, PlatinumElite™, or Chairman's Circle Commercial

Contractor as defined and certified by GAF.

C. Source Limitations: All components listed in this section shall be provided by a single manufacturer or approved by the primary roofing manufacturer.

D. Final Inspection

Manufacturer’s representative shall provide a comprehensive final inspection after completion of the roof system. All application errors must be addressed and final punch list completed.

1.06 PRE-INSTALLATION CONFERENCE

A. Prior to scheduled commencement of the roofing installation and associated work, conduct a meeting at the project site with the installer, architect, owner, GAF representative and any other persons directly involved with the performance of the work. The installer shall record conference discussions to include decisions and agreements reached (or disagreements), and furnish copies of recorded discussions to each attending party.

The main purpose of this meeting is to review foreseeable methods and procedures related to roofing work.

1.07 PERFORMANCE REQUIREMENTS

A. GAF shall provide all primary roofing materials that are physically and chemically compatible when installed in accordance with manufacturers current application requirements.

1.08 REGULATORY REQUIREMENTS

A. All work shall be performed in a safe, professional manner, conforming to all federal, state and local codes.

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1.09 DELIVERY, STORAGE AND HANDLING

A. Deliver all roofing materials to the site in original containers, with factory seals intact. All products are to carry a GAF label.

B. Store all pail goods in their original undamaged containers in a clean, dry location within their specified temperature range.

C. Do not expose materials to moisture in any form before, during, or after delivery to the site. Reject delivery of materials that show evidence of contact with moisture.

D. Remove manufacturer supplied plastic covers from materials provided with such. Use “breathable” type covers such as canvas tarpaulins to allow venting and protection from weather and moisture. Cover and protect materials at the end of each work day. Do not remove any protective tarpaulins until immediately before the material will be installed.

E. Materials shall be stored above 55°F (12.6°C) a minimum of 24 hours prior to application.

1.10 PROJECT CONDITIONS

A. Weather

1. Proceed with roofing only when existing and forecasted weather conditions permit.

2. Ambient temperatures must be above 45°F (7.2°C) when applying hot asphalt or water based adhesives.

1.11 WARRANTY

A. Provide Manufacturers standard EverGuard® Diamond Pledge™ Guarantee with single source edge-to-edge coverage and no monetary limitation where the manufacturer agrees to repair or replace components in the roofing system, which cause a leak due to a failure in materials or workmanship.

1. Duration: Twenty (20) years from the date of completion.

a) Covered components include GAF roofing membrane, liquid-applied membrane or coating, base flashing, high wall waterproofing flashing, insulation, expansion joint covers, preflashed accessories, and metal flashings used by the contractor of record that meet SMACNA standards (the “GAF Roofing

Materials”).

b) Materials and workmanship of listed products within this section are included when installed in accordance with current GAF application and specification requirements. Contact GAF Design

Services for the full terms and conditions of the guarantee.

c) Leaks caused by any non-GAF materials, such as the roof deck, existing materials, or non-GAF insulation are not covered.

2. This system is eligible for a 72 mph Wind Addendum provided all current GAF application requirements are followed and guarantee procedures are met. This is based on GAF guarantee requirements and is not intended to modify, negate or alter any requirements specified by the design professional or others.

PART 2 PRODUCTS

2.01 ACCEPTABLE MANUFACTURER

A. Acceptable Manufacturer: GAF, Commercial Roofing Products Division, which is located at: 1 Campus Drive;

Parsippany, NJ 07054; Toll Free Tel: 877-423-7663 (option 4, then option 2); Email: designservices@gaf.com;

Web: www.gaf.com mailto:designservices@gaf.com http://www.gaf.com/

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2.02 EXISTING INSULATION

A. Rigid polyisocyanurate board, with a glass-reinforced cellulosic felt facer. Conforms to or exceeds the requirements of ASTM C 1289 Type II, Class 1, Grade 2 with the following characteristics:

2.05 MEMBRANE MATERIALS

A. A smooth type, polyester scrim reinforced PVC membrane for use as a single ply roofing membrane. Meets or exceeds the minimum requirements of ASTM D-4434, Type III. UL Listed, FM Approved, Dade County

Product Approval, Florida Building Code Approved.

1. EverGuard® PVC 80 mil Smooth Membrane by GAF.

a) 10’ X 80’, each roll contains 800 sq. ft. of material weighing 422 lbs.

b) Half sheet rolls are required to be used in the perimeter for mechanically attached systems.

c) Color: Gray

2.06 CURB/WALL FLASHING MEMBRANE

A. GENERAL

1. EverGuard® membrane flashing should be of the same type and thickness as the roof membrane.

2. Because colored PVC membranes may exhibit different welding characteristics, please call the GAF Design

Services hotline at 877-423-7663, option 4, option 3 before attempting to weld different-colored PVC membranes with white membranes or flashings.

3. EverGuard® PVC Fleece-Back membranes are optional flashing membranes for all EverGuard® PVC systems. These membranes may be a solution when a contaminated substrate is encountered.

B. FLASHING MEMBRANE

1. A smooth type, polyester scrim reinforced PVC membrane for use as a single ply roofing membrane. Meets or exceeds the minimum requirements of ASTM D-4434, Type III. UL Listed, FM Approved, Dade County

Product Approval, Florida Building Code Approved.

a) EverGuard® PVC 80 mil Smooth Membrane by GAF.

2.07 ADHESIVES, SEALANTS AND PRIMERS

A. Solvent-based Bonding Adhesive: Solvent based rubberized adhesive for use with EverGuard PVC membranes, EverGuard® PVC Bonding Adhesive, by GAF.

B. One-part, moisture-cure, self-leveling sealant designed for use in pitch pans on single ply roof systems.

EverGuard® One-Part Pourable Sealant.

C. Solvent based, trowel grade synthetic elastomeric sealant. Durable and UV resistant suitable for use where caulk is typically used. Available in 10 oz. tubes, FlexSeal™ Caulk Grade Roof Sealant by GAF.

D. Commercial grade roofing sealant suitable for sealing the upper lip of exposed termination bars and penetrations and around clamping rings and comes with a 20 yr. ltd warranty against leaks caused by manufacturing defects. Meets the performance criteria of ASTM D412, ASTM D2196, ASTM D1475 and

ASTM D1644, FlexSeal™ Roof Sealant, by GAF.

E. One part butyl based high viscosity sealant suitable for sealing between flashing membrane and substrate surface behind exposed termination bars and for sealing between roofing membrane and drain flange.

EverGuard® Water Block, by GAF.

F. Solvent based conditioner used to clean exposed or contaminated seams prior to heat welding to remove any residual soap and help revitalize aged membranes. EverGuard® PVC Membrane Conditioner, by GAF.

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2.08 FASTENERS AND PLATES

A. Mechanical Fasteners & Plates

1. Drill-Tec™ XHD Fastener (#15): Heavy gauge alloy steel fastener with CR-10 coating with a .275” (6.9

mm) diameter thread. Miami Dade and Factory Mutual Standard 4470 Approved, #3 Phillips truss head for use on wood and steel decks

2. Drill-Tec™ XHD Plates: Galvalume, 2 3/8” (60 mm) diameter, with a barbed underside. Suitable for use with Drill•Tec™ Standard, HD, and XHD Screws, Purlin Fasteners and Drill•Tec™ Spikes.

2.09 FLASHING ACCESSORIES

A. GENERAL FLASHING ACCESSORIES

1. A smooth type, unreinforced PVC based membrane for use as an alternative flashing/reinforcing material for penetrations and corners. Required whenever preformed vent boots cannot be used, available in standard white, 0.055 inches (55 mils) nominal thickness and sheet size: 24in x 50ft. EverGuard® PVC UN-55

Detailing Membrane, by GAF.

2. 24 gauge steel with 0.025” thick PVC based film as required for fabrication into metal gravel stop and drip edge profiles, metal base and curb flashings, sealant pans, and scupper sleeves. Standard sheet size 4’ x 10’, available in 24-Gauge and 20-Gauge galvanized steel, aluminum and stainless steel. Custom sizes available, and available in standard white, EverGuard® PVC Coated Metal, by GAF.

3. Extruded aluminum termination bar with angled lip caulk receiver and lower leg bulb stiffener. Pre-punched slotted holes at 6” on center or 8” on center. ¾” x 10’ with 0.090” cross section, DRILL-TEC™

Termination Bar, by GAF.

4. .080” (80 mil) thick smooth type, unreinforced membrane designed for use as a conforming membrane seal over T-joints in 80 mil membrane applications. EverGuard® PVC T-Joint Patches, by GAF.

5. 050” (50 mil) thick smooth type, reinforced PVC membrane designed for use at areas that require a reinforced membrane for flashing or to strip-in coated metal flanges. Roll size 8” x 100’ and available in standard white, EverGuard® PVC 50 mil Utility Flashing Membrane, by GAF.

B. WALL & CURB ACCESSORIES

1. 0.075” thick molded PVC membrane designed to accommodate inside corners of base and curb flashing.

Hot-air welds directly to EverGuard PVC membrane. Size 6” x 6” x 5.25”, EverGuard® PVC Preformed

Inside Corners by GAF.

2. 0.055” thick molded PVC membrane designed to accommodate imperfect corners of base and curb flashing.

Hot-air welds directly to EverGuard PVC membrane and 8” in diameter, EverGuard® PVC Fluted

Corners by GAF.

3. 0.070” thick molded PVC membrane designed to accommodate both inside and outside corners of base and curb flashing. Hot-air welds directly to EverGuard PVC membrane. Size 3” x 3” with a 6” flange, EverGuard® PVC Universal Corners by GAF

4. 0.050” (50 mil) thick molded PVC membrane designed to be used with EverGuard® PVC roofing membranes. Hot-air welds directly to EverGuard PVC membrane. Available in standard white, 12” high with a 6” base, and available in four standard sizes, EverGuard® PVC Corner Curb Wrap by GAF.

C. PENETRATION ACCESSORIES

1. 0.075” thick molded PVC membrane sized to accommodate most common pipe and conduits, (1” to 6” diameter pipes), including square tube. Hot-air welded directly to EverGuard PVC membrane, supplied with stainless steel clamping rings, EverGuard® PVC Preformed Vent Boots by GAF.

2. 0.055” thick molded PVC membrane sized to accommodate most vents and pipes between 1 and 6 inches in diameter. Hot-air welded directly to EverGuard PVC membrane, supplied with stainless steel clamping rings, EverGuard® PVC Conical Pipe Boot by GAF.

3. Constructed from reinforced PVC membrane and split to accommodate pipes and conduits where closed boots cannot be used. Available in three standard sizes, EverGuard® PVC Split Pipe Boots, by GAF.

4. Constructed from reinforced PVC membrane and designed to be wrapped around square and rectangular roof penetrations. Hot-air welds directly to EverGuard PVC membrane and supplied with stainless steel

07 54 19 - 6 clamping rings. Available in standard white and two standard sizes, EverGuard® PVC Square Tube

Wrap by GAF.

5. One-piece seamless body manufactured from 0.125” 11-gauge spun aluminum used for depressed sump area for improved flow and to facilitate drainage. PVC-coated flange for direct hot-air welding of PVC roof membranes. Available in four standard sizes, EverGuard® PVC Coated Hercules Drain by GAF.

6. Manufactured with the GAF SpeedTite™ (a trademark of OMG Roofing Products) Mechanical Seal and

“drop-in-ready” packaging and fastest installed drain on the market. Designed with a maximum inside diameter drain stem designed for improved flow performance. Available in two standard sizes, EverGuard® PVC Coated SpeedTite™ Drain by GAF.

D. WALKWAYS

1. 1/8” thick extruded and embossed PVC roll 30” x 36’, heat welds directly to roofing membrane, EverGuard® PVC Walkway Rolls by GAF.

PART 3 EXECUTION

3.06

SITE CONDITIONS

A. Obtain verification that the building structure can accommodate the added weight of the new roofing system.

B. Confirm the adequacy of the new roofing system to provide positive slope to drain. Eliminate ponding areas by the addition of drainage locations or by providing additional pitch to the roof surface.

C. Prepare substrate surfaces thoroughly prior to application of new roofing materials. This is particularly important for re-cover and reroofing applications. Providing a smooth, even, sound, clean, and dry substrate minimizes the likelihood that underlying deficiencies will cause premature deterioration or even failure of the new roofing system.

D. All defects in the roof deck or substrate must be corrected by the responsible parties before new roofing work commences. Verify that the deck surface is dry, sound, clean, and smooth, and free of depressions, waves, or projections.

E. Protect building surfaces against damage and contamination from roofing work.

F. Where work must continue over completed roof areas, protect the finished roofing system from damage.

G. Deck preparation is the sole responsibility of the building owner or roofing contractor. All defects in the roof deck or substrate must be corrected before roofing work commences. Corrections to be brought to owner before repairs are made by using a RFI or change order form.

H. Refer to GAF Roof Guarantee Program for specific requirements for extended guarantees.

I. Mark any existing conduits or lines under insulation, cover board prior to using fasteners to avoid puncturing utility lines.

3.07

SUBSTRATE PREPARATION

A. Partial Tear-off

1. Remove all existing roofing materials down to the insulation, including flashings, metal edgings, drain leads, pipe boots, and pitch pockets, and clean substrate surfaces of all asphalt and adhesive contaminants.

2. It is the responsibility of the owner or roofing contractor to determine if existing materials (including decking and existing insulation) are suitable for re-use. Confirm the quality and condition of the roof insulation and/or decking by visual inspection. Fastener pull-out testing must be conducted by the roof fastener manufacturer.

3. Remove and replace any wet or damaged areas and re-secure insulation as needed.

4. Remove abandoned equipment and equipment supports.

5. Confirm that the height of equipment supports will allow the installation of full-height flashings.

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B. 3/8” Plywood over 2 7/8” Tongue & Groove

1. Preservatives or fire retardants used to treat the decking must be compatible with roofing materials.

2. The deck must be installed over joists that are spaced 24” (61 cm) o.c. or less.

3. Decking should be kept dry and roofed promptly after installation.

4. Moisture content not to exceed 16%.

5. Insulation above the deck may be necessary to prevent condensation from adversely affecting the deck.

6. Must meet minimum pull out values. Minimum 5 test pulls per 1,000 sq. ft. (93 sq. m.).

7. Code standards apply when their requirements exceed those listed here.

3.08 NAILER INSTALLATION

A. Acceptable Wood

1. Solid Blocking: Non-pressure treated wood as required, #2 Grade or better, nominal 1 1 /4" (30 mm) x 4"

(102 mm) with a minimum thickness of 3 1 /2" (88 mm).

2. Shim Material: Plywood, 1 /2" (13 mm) x width to match solid blocking.

3. Verify the condition of existing roof nailers and anchor to resist 250 lb. per ft. (550 kg) load applied in any direction. New nailers should meet same load requirements.

4. DRILL-TEC™ HD screws 18" (457 mm) o.c. attachment to structural wood, steel decks with a 1" (25 mm) thread embedment.

5. DRILL-TEC™ spikes or HD screws 18" (457 mm) o.c. attachment to concrete decks. Min. 1" (25 mm) shank or thread penetration.

6. Wood nailers attached to gypsum, concrete, cellular concrete and cementitious wood fiber must be fastened

12" (305 mm) o.c., through the nailer into the substrate with substrate approved DRILL-TEC™ fasteners.

7. Three anchors per length of wood nailer minimum.

B. Metal Blocking

1. 20 Ga. galvanized steel box with pre-punched holes and supplied with corrosion-resistant fasteners.

2. Closure and finish strip required for metal decking.

3. Secure in place using provided #14 x 1½-in. universal fasteners through pre-punched holes to roof edge.

4. Install end cap and top of box section with #14 x 1½-in. universal fasteners.

3.09 INSTALLATION – GENERAL

A. Install GAF’s EverGuard® PVC roofing system according to all current application requirements in addition to those listed in this section.

B. GAF EverGuard® PVC Specification #: PMATI80

C. Start the application of membrane plies at the low point of the roof or at the drains, so that the flow of water is over or parallel to, but never against the laps.

3.10 SINGLE PLY MEMBRANE APPLICATION

A. GENERAL

1. Substrates must be inspected and accepted by the contractor as suitable to receive and hold roof membrane materials.

2. Place roof membrane so that wrinkles and buckles are not formed. Any wrinkles or buckles must be removed from the sheet prior to permanent securement.

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3. Membrane that has been exposed for more than 12 hours or has become contaminated will require additional cleaning methods.

a) Light Contamination - Membrane that has been exposed overnight up to a few days to debris, foot traffic, or dew or light precipitation can usually be cleaned with a white cloth moistened with

EverGuard® PVC Membrane Cleaner, MEK (methyl ethyl ketone) or acetone can be used. Be sure to wait for cleaner to dry/flash-off prior to welding.

b) Dirt-Based Contamination - Membrane that is dirt encrusted will require the use of a low-residue cleaner, such as Formula 409® and a mildly abrasive scrubbing pad to remove the dirt. This must be followed by cleaning with a white cloth moistened with EverGuard® PVC Membrane Cleaner, MEK

(methyl ethyl ketone) or acetone can be used. Be sure to wait for cleaner to dry/flash-off prior to welding.

c) Exposure-Based Contamination - Membrane that is weathered or oxidized will require the use of a low-residue cleaner such as Formula® 409 and a mildly abrasive scrubbing pad to remove the weathered/oxidized top surface layer. This must be followed by cleaning with a white cloth moistened with EverGuard® PVC Membrane Cleaner, MEK (methyl ethyl ketone) or acetone can be used. Be sure to wait for cleaner to dry/flash-off prior to welding. Unexposed membrane left in inventory for a year or more may need to be cleaned as instructed above. Be sure to wait for solvent to flash off prior to welding.

d) Chemical-Based Contamination - Membrane that is contaminated with bonding adhesive, asphalt, flashing cement, grease and oil, and most other contaminants usually cannot be cleaned sufficiently to allow an adequate heat weld to the membrane surface. These membranes should be removed and replaced.

B. Mechanically Attached:

1. Place membrane so that wrinkles and buckles are not formed. Any wrinkles or buckles must be removed from the sheet prior to permanent attachment. Roof membrane shall be mechanically fastened immediately after it is rolled out, followed by welding to adjacent sheets.

2. For PVC membranes, the solid line (overlap line) is marked on the top ply 5” (127 mm) from the sheet edge.

The fastener line is a nominal 2” (51 mm) from the sheet edge, and an “X” is placed between the sheet edge and the field seam overlap line with spacing every 6” (152 mm).

3. For selvage edge laps of EverGuard® PVC membrane, overlap the roof membrane a minimum of 3" (76

mm) and heat weld the laps. Non-salvage end laps of PVC Fleece-Back membranes are made by butting adjacent sheets and heat welding an 8" (203 mm) wide EverGuard® PVC reinforced membrane flashing strip over the end laps.

4. Install membrane so that the side laps run across the roof slope lapped towards drainage points.

5. On metal decking, install sheets perpendicular to deck direction so that fasteners will penetrate the top flanges and not the flutes; however, there will be limited areas of the roof (i.e., perimeter areas) where this is not practical. If the deck is running opposite the slope of the roof (flutes running horizontally), then the membrane should run ridge-to-gutter to ensure proper fastening to the top flanges of the deck.

6. All exposed sheet corners shall be rounded a minimum of 1”.

7. Use full width rolls in the field of roof and half width rolls in the perimeter and corner region of the roof and mechanically fastened in the side lap area to the roof deck. Width of the perimeter region must be determined in accordance with the Perimeter Half Sheet Table in the EverGuard® specification manual.

8. Membrane laps shall be heat-welded together. All welds shall be continuous, without voids or partial welds.

Welds shall be free of burns and scorch marks.

9. Weld shall be a minimum of 1-1/2” in width for automatic machine welding and a minimum 2” in width for hand welding.

10. The membrane shall be mechanically fastened in the side lap area to the roof deck with Drill-Tec™ #15

XHD Fasteners and 2 3/8” XHD Plates, 6” o.c, through the Tongue & Groove deck.

11. For decks less than 3/4", fastener spacing is based on a minimum 200 lbf fastener pull out value. Max building height is 40' Exposure B or 30' Exposure C. Building must be enclosed in a non-special/high wind region. For buildings exceeding these specifics, contact GAF Design Services.

12. The metal plates must be placed within ¼” to ¾” of the membrane edge. Plates shall not be placed less than

¼” from the membrane edge.

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13. Pre-drilling is required for concrete decks, and may be required for gypsum concrete and cementitious wood fiber decks.

14. In the corner regions, additional fasteners shall be installed through the perimeter membrane to form a grid pattern, with an 8” (40.5 cm) wide EverGuard® PVC reinforced membrane flashing-strip welded over the additional fasteners. Corners include both outside and inside corners that measure 75° - 105° angle.

15. Membrane attachment to the roof deck is required at locations of deck angle changes in excess of five (5) angle degrees (1” in 12”).

16. Supplemental membrane attachment is required at the base of all walls and curbs, and where the angle of the substrate changes by more than ten (10) degrees (1” in 12”). Roofing membrane shall be secured to the structural deck with screws and plates of the same type and spacing used for in-lap attachment. The screws and plates must be installed no less than ½” from the membrane edge. Alternatively, the roofing membrane may be turned up the vertical plane a minimum of 3” and secured with screws and termination bar. Fastener spacing is the same as is used for in-lap attachment. The termination bar must be installed within 1-1/2” to

2” of the plane of the roof membrane, with a minimum of 1” of membrane extending above the termination bar.

17. Supplemental membrane attachment to the structural deck is required at all penetrations. Roofing membrane shall be secured to the deck with appropriate Drill-Tec™ screws and plates.

18. Fasteners must be installed to achieve the proper embedment depth. Install fasteners without lean or tilt.

19. Install fasteners so that the plate or termination bar is drawn down tightly to the membrane surface. Properly installed fasteners will not allow the plate or termination bar to move (underdriving), but will not cause wrinkling of the membrane (overdriving).

3.11 FLASHINGS

A. GENERAL

1. All penetrations must be at least 24” (61 cm) from curbs, walls, and edges to provide adequate space for proper flashing.

2. Flash all perimeter, curb, and penetration conditions with coated metal, membrane flashing, and flashing accessories as appropriate to the site condition.

3. All coated metal and membrane flashing corners shall be reinforced with preformed corners or non-reinforced membrane.

4. Installation of EverGuard® PVC flashing membrane over asphalt-based substrates requires a polymat slip sheet or approved insulation boards under the PVC flashing membrane.

5. Hot-air weld all flashing membranes, accessories, and coated metal. A minimum 2” wide (hand welder) weld or minimum 1 - 1/2" automatic machine weld is required.

6. Consult the EverGuard® Application and Specifications Manual or GAF Contractor Services for more information on specific construction details, or those not addressed in this section

B. Coated Metal Flashings:

1. Coated metal flashings shall be formed in accordance with current EverGuard construction details and

SMACNA guidelines.

2. Coated metal sections used for roof edging, base flashing and coping shall be butted together with a ¼” gap to allow for expansion and contraction. Hot-air weld a 6” wide reinforced membrane flashing strip to both sides of the joint, with approximately 1” on either side of the joint left un-welded to allow for expansion and contraction. 2” wide aluminum tape can be installed over the joint as a bond-breaker, to prevent welding in this area.

3. Coated metal used for sealant pans, scupper inserts, corners of roof edging, base flashing and coping shall be overlapped or provided with separate metal pieces to create a continuous flange condition, and pop-riveted securely. Hot-air weld a 6” wide reinforced membrane flashing strip over all seams that will not be sealed during subsequent flashing installation.

4. Provide a ½” hem for all exposed metal edges to provide corrosion protection and edge reinforcement for improved durability.

5. Provide a ½” hem for all metal flange edges whenever possible to prevent wearing of the roofing and flashing membranes at the flange edge.

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6. Coated metal flashings shall be nailed to treated wood nailers or otherwise mechanically attached to the roof deck, wall or curb substrates, in accordance with construction detail requirements.

C. Reinforced Membrane Flashings:

1. The thickness of the flashing membrane shall be the same as the thickness of the roofing membrane.

2. Membrane flashing may either be installed loose or fully adhered to the substrate surface in accordance with

“Construction Detail Requirements”.

3. Apply the adhesive only when outside temperature is above 40°F. Recommended minimum application temperature is 50°F to allow for easier adhesive application.

4. The membrane flashing shall be carefully positioned prior to application to avoid wrinkles and buckles.

5. Please note that solvent-based adhesives must be allowed to dry until tacky to the touch before mating flashing membrane. Water-based adhesive must be allowed to flash off completely.

6. Heat-weld all laps in EverGuard® smooth-reinforced flashing membrane in accordance with heat-welding guidelines. All seams in fleece-back membrane and smooth field sheet must be stripped in with 8" (203 mm) flashing strip.

7. For extended length guarantees, separate counterflashing is required; exposed termination bars are not acceptable.

D. Un-Reinforced Membrane Flashings:

1. Un-reinforced membrane is used to field-fabricate penetration or reinforcement flashings in locations where preformed corners and pipe boots cannot be properly installed.

2. Penetration flashings constructed of un-reinforced membrane are typically installed in two sections, a horizontal piece that extends onto the roofing membrane and a vertical piece that extends up the penetration.

The two pieces are overlapped and hot-air welded together.

3. Apply the adhesive only when outside temperature is above 40°F. Recommended minimum application temperature is 50°F to allow for easier adhesive application.

4. The membrane flashing shall be carefully positioned prior to application to avoid wrinkles and buckles.

5. Please note that solvent-based adhesives must be allowed to dry until tacky to the touch before mating flashing membrane. Water-based adhesive must be allowed to flash off completely.

E. Roof Edges:

1. Roof edge flashings are applicable for gravel stop and drip edge conditions as well as for exterior edges of parapet walls.

2. Flash roof edges with coated metal flanged edging with a minimum 3" (76 mm) wide flange nailed 4" (102

mm) on center to wood nailers, and heat weld 8” (203 mm) membrane strip to metal flanges.

3. When the fascia width exceeds 4” (102 mm), coated metal roof edging must be attached with a continuous cleat to secure the lower fascia edge. The cleat must be secured to the building no less than 12” (305 mm) o.c.

4. Flash roof edge scuppers with a coated metal insert that is mechanically attached to the roof edge and integrated as a part of the metal edging.

5. Alternatively, roof edges may be flashed with a 2-piece snap on fascia system, adhering the roof membrane to a metal cant and face nailing the membrane 8” (152 mm) on center prior to installing a snap-on fascia.

a) Submit design drawings for review and approval to Architect or Specifier before fabrication.

b) Installing contractor shall check as-built conditions and verify the manufacturer’s roof edging details for accuracy to fit the wall assembly prior to fabrication. The installer shall comply with the roof edging manufacturer’s installation guide when setting edging.

F. Parapet and Building Walls:

1. Flash walls with EverGuard® PVC membrane adhered to the substrate with bonding adhesive, loose applied or with coated metal flashing nailed 4” (102 mm) on center to pressure-treated wood nailers.

2. Maximum flashing height without intermediate fastening is 24" (610 mm) for loose-applied flashing and 54"

(1.4 m) for adhered flashing

3. Secure membrane flashing at the top edge with a termination bar. EverGuard® Water Block shall be applied between the wall surface and membrane flashing underneath all exposed termination bars. Exposed

07 54 19 - 11 termination bars shall be mechanically fastened 6” (152 mm) on center for guarantees less than 20 years and

12” (305 mm) on center for guarantees greater than 20 years or that are counter-flashed.

4. Exposed termination bars must be sealed with Flexseal™ Caulk Grade Sealant.

5. Roof membrane must be mechanically attached along the base of walls with screws and plates 12” (305

mm) on center [6” (152 mm) on center for Ballasted Systems]

6. Metal cap flashings must have continuous cleats or be face fastened 12" (305 mm) o.c. on both the inside and outside of the walls.

7. Flash wall scuppers with a coated metal insert that is mechanically attached to the wall and integrated as part of the wall flashing.

G. Curbs and Ducts:

1. Flash curbs and ducts with EverGuard® PVC membrane adhered to the curb substrate with bonding adhesive, loose applied or with coated metal flashing nailed 4” on center to pressure-treated wood nailers.

2. Maximum flashing height without intermediate fastening is 24" (610 mm) for loose-applied flashing and 54"

(1.4 m) for adhered flashing

3. Secure membrane flashing at the top edge with a termination bar. EverGuard® Water Block shall be applied between the wall surface and membrane flashing underneath all exposed termination bars. Exposed termination bars shall be mechanically fastened 6” (152 mm) on center for guarantees less than 20 years and

12” (305 mm) on center for guarantees greater than 20 years or that are counter-flashed.

4. Exposed termination bars must be sealed with Flexseal™ Caulk Grade Sealant.

5. Roof membrane must be mechanically attached along the base of walls with screws and plates 12” (305

mm) on center [6” (152 mm) on center for Ballasted Systems]

6. Metal counterflashings may be optional with fully adhered flashings depending on guarantee requirements.

Exposed termination bars must be sealed with Flexseal™ Roofing Cement.

7. All coated metal curb flashings and loose applied membrane flashings must be provided with separate metal counterflashings, or metal copings.

H. Roof Drains:

1. Roof drains must be fitted with compression type clamping rings and strainer baskets. Original-type cast iron and aluminum drains, as well as retrofit-type cast iron, aluminum or molded plastic drains are acceptable.

2. Roof drains must be provided with a minimum 36” x 36” sump. Slope of tapered insulation within the sump shall not exceed 4” in 12”.

3. Extend the roofing membrane over the drain opening. Locate the drain and cut a hole in the roofing membrane directly over the drain opening. Provide a ½” of membrane flap extending past the drain flange into the drain opening. Punch holes through the roofing membrane at drain bolt locations.

4. For cast iron and aluminum drains, the roofing membrane must be set in a full bed of water block on the drain flange prior to securement with the compression clamping ring. Typical water block application is one

10.5 ounce cartridge per drain.

5. Lap seams shall not be located within the sump area. Where lap seams will be located within the sump area, a separate roof membrane drain flashing a minimum of 12” larger than the sump area must be installed. The roof membrane shall be mechanically attached 12” on center around the drain with screws and plates. The separate roof drain flashing shall be heat welded to the roof membrane beyond the screws and plates, extended over the drain flange, and secured as above.

6. Tighten the drain compression ring in place.

I. Expansion Joints:

1. Any prefabricated expansion joint metal nailing strips must be fastened to wood nailers, curbs or secured to walls with appropriate nails or DRILL-TEC™ Fasteners.

2. Roof membrane must be mechanically attached along the base of raised curb-expansion joints with screws and plates a minimum of 12" (305 mm) o.c. The expansion joint cover bellows shall be at least 2 times the expansion joint opening.

3. Metal nailing strip must be set in FlexSeal™ Caulk Grade Sealant and secured with fasteners and neoprene washers fastened 6" (152 mm) o.c

07 54 19 - 12

4. Expansion joints may be field fabricated. Reference appropriate Construction Detail.

J. Scuppers:

1. Coated-metal roof-edge scuppers must be provided with a min. 4" (102 mm) wide flange nailed to wood nailers, with hemmed edges and secured with continuous clips in accordance with the gravel stop assembly.

2. Coated-metal wall scuppers must be provided with 4" (102 mm) wide flanges, with additional corner pieces pop-riveted to the flanges to create a continuous flange. All flange corners must be rounded.

3. Install wall scuppers over the roof and flashing membrane and secure to the roof deck/wall with DRILL-

TEC™ Fasteners 6" (152 mm) o.c., a minimum of 2 fasteners per side.

4. All corners must be reinforced with EverGuard® PVC Universal Corners or field-fabricated from

EverGuard® non-reinforced materials.

5. Strip-in scupper with flashing membrane target sheet.

6. Alternately, a wall scupper box may be field-flashed using non-reinforced flashing membrane heat-welded to membrane on the wall face and roof deck. Fully adhere to the scupper box and terminate on the outside wall face with a termination bar and FlexSeal™ Caulk Grade sealant.

K. Wood Support Blocking:

1. Wood support blocking, typically 4" x 4" (102 mm x 102 mm), is usually installed under light-duty or temporary roof-mounted equipment, such as electrical conduit, gas lines, condensation, and drain lines.

2. Install wood support blocking over a protective layer of PVC walkway pads. Place wood blocking on oversized slip sheet, fold two sides vertically, and fasten with roofing nails into the blocking.

3.12 TRAFFIC PROTECTION

A. Install walkway rolls at all roof access locations and other designated locations including roof-mounted equipment work locations and areas of repeated rooftop traffic.

B. Walkway pads must be spaced 6" apart to allow for drainage between the pads.

C. Heat-weld walkway rolls to the roof membrane surface continuously around the perimeter of the roll.

3.13 ROOF PROTECTION

A. Protect all partially and fully completed roofing work from other trades until completion.

B. Whenever possible, stage materials in such a manner that foot traffic is minimized over completed roof areas.

C. When it is not possible to stage materials away from locations where partial or complete installation has taken place, temporary walkways and platforms shall be installed in order to protect all completed roof areas from traffic and point loading during the application process.

D. Temporary tie-ins shall be installed at the end of each workday and removed prior to commencement of work the following day.

3.14 CLEAN-UP

A. All work areas are to be kept clean, clear and free of debris at all times.

B. Do not allow trash, waste, or debris to collect on the roof. These items shall be removed from the roof on a daily basis.

C. All tools and unused materials must be collected at the end of each workday and stored properly off of the finished roof surface and protected from exposure to the elements.

07 54 19 - 13

D. Dispose of or recycle all trash and excess material in a manner conforming to current EPA regulations and local laws.

E. Properly clean the finished roof surface after completion, and make sure the drains and gutters are not clogged.

F. Clean and restore all damaged surfaces to their original condition.

END OF SECTION