ROOFING GUIDE SPECIFICATION PREPARED BY SIPLAST, INC.

PARASOLO PVC KEE ROOF MEMBRANE SYSTEM ADHERED OVER MECHANICALLY ATTACHED OR ADHERED INSULATION

STRUCTURAL CONCRETE, STEEL AND WOOD DECKS

This specification is provided as a general guide for use of Siplast, Inc. 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 Siplast, Inc. 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.

September 1, 2023

SECTION 07 54 19 – POLYVINYL CHLORIDE ROOFING

PART 1 - GENERAL

RELATED DOCUMENTS

The project plans, details and general Contract requirements apply to this Section.

SUMMARY

Items Included:

Substrate board.

Vapor retarder.

Roof insulation.

Cover panel.

PVC KEE membrane roofing.

Walktread.

Related Sections:

[Section 06 10 00 "Rough Carpentry"] [Section 061053 "Miscellaneous Rough Carpentry"] for wood nailers, curbs, and blocking, and for wood-based, structural-use roof deck panels.

Section 06 16 00 "Sheathing" for wood-based, structural-use roof deck panels.

Section 07 62 00 "Sheet Metal Flashing and Trim" for sop and field formed metal roof flashings and counter flashings.

Section 07 71 00 "Roof Specialties" for premanufactured metal copings, roof edge fascia, gravel stops, reglets, roof edge flashings, and counter flashings.

Section 07 92 00 "Joint Sealants" for joint sealants, joint fillers, and joint preparation.

REFERENCES

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT STANDARD REFERENCES.

PREINSTALLATION MEETINGS

Pre-installation Roofing Conference at Jobsite: Hold a meeting with the Owner, Construction Manager, Architect, Roofing Contractor, Roofing Manufacturer's Representative, and other applicable trades to discuss the means and methods related to roofing installation. The Roofing Contractor shall examine the substrate that will receive the specified roofing materials and confirm its suitability for attachment of the specified roofing system.

SUBMITTAL OF ALTERNATE SYSTEMS

Consideration of Alternate Systems: Submit primary roof systems to be considered as equals to the specified roof system no less than 10 days prior to bid date. Primary roof systems which have been reviewed and accepted as equals to the specified roof system will be listed in an addendum prior to bid date; only then will equals be accepted at bidding. Submittals shall include the following:

Identify fire and hail ratings in Items 6 and 8 below.

Two 3 inch x 5 inch samples of the primary roofing and flashing sheets.

Latest edition of the roofing system manufacturer's specifications and installation instructions.

Evidence that the manufacturer of the proposed roofing system utilizes a quality management system that is ISO 9001 certified. Documentation of ISO 9001 certification of foreign subsidiaries without domestic certification will not be accepted.

Evidence and description of manufacturer's quality control/quality assurance program for the primary roofing products supplied. The quality assurance program description shall include all methods of testing for physical and mechanical property values. Provide confirmation of manufacturer's certificate of analysis for reporting the tested values of the actual material being supplied for the project prior to issuance of the specified guarantee.

Descriptive list of the materials proposed for use.

Evidence of Underwriters' Laboratories Class [-----] acceptance of the proposed roofing system (including mopping asphalt or cold adhesive) without additional requirements for gravel or coatings.

Evidence that the roof configuration (including fastening of insulation) has been tested by an accredited independent testing agency to meet the design wind load pressure indicated in Part 1.07 C2.

The roof membrane configuration shall be approved by FM Global for [Class 1-SH (severe hail) exposure] [Class 1-VSH (very severe hail) exposure].

Complete list of material physical and mechanical properties for each sheet including: weights and thicknesses.

Sample copy of the proposed guarantee.

Technical Product Data: Submit the manufacturer’s technical product data sheets for each type of product.

Shop Drawings: Include plans, sections, and shop drawings/details for all applicable conditions.

Product Samples: Submit product samples of the specified base, finish, flashing reinforcing, and flashing membrane plies.

INFORMATIONAL SUBMITTALS

Qualification Data:

Installer: Submit written confirmation that they have a minimum of 2 years of experience in successfully installing the same or similar roofing materials and be certified in writing by the roofing materials manufacturer to install the primary roofing products.

Manufacturer: Ensure that the primary roofing materials manufacturer provides direct trained company personnel to attend necessary job meetings, perform periodic inspections as necessary, and conduct a final inspection upon successful completion of the project.

System Qualification:

Intent to Warrant Letter: Submit a signed letter on the roof membrane manufacturer’s letterhead, confirming that specified roofing system complies with the guarantee requirements indicated in Part 1.11 and the criteria indicated in Part 2.2 Roof Membrane Sheet Materials.

Sample Guarantee: Submit a sample copy of the manufacturer’s proposed Guarantee.

CLOSEOUT SUBMITTALS

Maintenance Data: Submit the manufacturer’s care and maintenance guide.

Executed Guarantee: Provide the Owner with an executed version of the specified guarantee.

QUALITY ASSURANCE

Fire Rating: Submit evidence of exterior fire-test exposure by an approved third-party testing agency in accordance with ASTM E108 or UL 790 guidelines.

Indicate Class A, B, or C for the fire rating where the brackets appear in item 1 below.

Class [----]

Hail Rating: Submit evidence by FM Global that the roof configuration has been tested to meet the following specified hail resistance design.

Class 1-SH (severe hail) exposure.

Class 1-VSH (very severe hail) exposure.

Wind Uplift Rating: Submit evidence by an approved third-party testing agency that the roof configuration has been tested to meet the following specified wind uplift design.

Select item “1” for FM Global rated systems, or item “2” if using a different code approval agency or independent laboratory testing. Indicate the wind uplift design criteria where the brackets appear.

Class 1, 1-[----] windstorm construction.

Minimum design wind load pressure of - [----] psf.

DELIVERY, STORAGE, AND HANDLING

Delivery: Deliver roofing materials to Project site in original containers with seals unbroken and labeled with manufacturer's name, product brand name and type, date of manufacture, approval or listing agency markings, and directions for storing and mixing with other components.

Storage: Store liquid materials in their original undamaged containers in a clean, dry, protected location and within the temperature range required by roofing manufacturer.

Protect stored liquid material from direct sunlight, heat, open fire, ignition sources, oxidizing agents, strong acids, and strong alkalis.

Discard and legally dispose of liquid material that cannot be applied within its stated shelf life.

Protection: Protect roof insulation materials from physical damage and from deterioration by sunlight, moisture, soiling, and other sources. Comply with the insulation manufacturer's written instructions for handling, storing, and protecting materials during installation.

Handling: Handle and place roofing materials and equipment in a manner to avoid permanent deflection of deck.

FIELD CONDITIONS

Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit roofing to be installed in accordance with manufacturer's written instructions and warranty requirements.

Membrane Protection: Provide protection against staining and mechanical damage for newly applied roofing and adjacent surfaces throughout this project.

Debris Removal: Remove all debris daily from the project site and take to a legal dumping area authorized to receive such materials.

Site Condition: Complete, to the owner's satisfaction, all job site clean-up including building interior, exterior and landscaping where affected by the construction.

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT TORCH SAFTEY GUIDELINES.

GUARANTEE

Manufacturer’s Guarantee: Provides that the Manufacturer will repair leaks through the covered roofing materials due to material or workmanship defects, subject to certain exclusions, during the specified time period. Refer to guarantee for complete coverage and restrictions.

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT GUARANTEE COVERAGE.

[NOTE: “Membrane” coverage includes only the roof membrane and flashing system.

“Membrane and Insulation” coverage includes the roof membrane, flashing system, insulation components and accessories supplied by Siplast, Inc. and is required for guarantee periods of 25 and 30 years when applying the roof membrane over insulation.]

Special Project Warranty: Submit roofing contractor’s warranty signed by the Installer, including all components of the roofing and insulation system for the following warranty period:

Warranty Period: [---] years from date of Substantial Completion.

PART 2 - PRODUCTS

MANUFACTURERS

A.	Manufacturer: A roof system by the following manufacturer is approved for application.

Siplast, Inc.

ROOFING MEMBRANE SHEET MATERIALS

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT ROOF MEMBRANE.

BASE FLASHING SHEET MATERIALS

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT FLASHING MEMBRANE.

Retain liquid-applied flashing options below to meet specific project requirements.

Liquid Flashing System: The specified liquid flashing system shall consist of a catalyzed PMMA-based membrane fully reinforced with a non-woven polyester fleece that is installed over a prepared substrate.

Parapro 123 Flashing by Siplast, Inc.

Liquid Flashing System: The specified liquid flashing system shall consist of an STP-based membrane fully reinforced with a non-woven polyester fleece that is installed over a prepared substrate.

Paraflex 531 Liquid Flashing by Siplast, Inc.

PRIMERS

Asphalt Primer: Primer shall meet ASTM D41 criteria.

PA-1125 Asphalt Primer by Siplast, Inc.

Low VOC Asphalt Primer: Primer shall meet ASTM D41 criteria and South Coast Air Quality Management District and Ozone Transport Commission requirements.

PA-917 Primer by Siplast, Inc.

Primer for Self-Adhesive Membranes: Primer for self-adhesive membranes shall be a single component, water-based resinous primer formulated to condition masonry, wood, plywood, concrete, asphaltic, and gypsum surfaces to facilitate adhesion of self-adhesive membranes.

TA-119 Primer by Siplast, Inc.

AUXILIARY ROOFING MATERIALS

Delete auxiliary roofing materials listed below, as necessary, to meet individual project requirements.

Finish and Flashing Ply Membrane Adhesive for Fleece-Back Membrane: A dual component low-rise polyurethane foam adhesive designed specifically for the adhesion of the roof membrane to substrate. Acceptable manufacturers are as follows:

Parafast Adhesive T by Siplast, Inc.

Finish and Flashing Membrane Adhesive for Smooth Membrane: A solvent-based, low VOC, rubberized adhesive designed for bonding PVC single-ply roofing membranes and flashings to various roofing substrates.

Parasolo PVC Bonding Adhesive by Siplast, Inc.

Spray-applied Finish and Flashing Membrane Adhesive for Smooth Membrane: A single-component adhesive dispensed from a pressured metal canister to adhere smooth PVC single-ply roofing membranes and flashings to various substrates.

Parasolo Quick Spray Adhesive by Siplast, Inc.

Sealant: A solvent-based, UV resistant synthetic elastomeric sealant for the completion of details.

1.	Parasolo Flexseal Caulk Grade

Water Block: A single component butyl-based high viscosity sealant for sealing the flashing membrane to the substrate behind exposed termination bars and at drain flanges.

Parasolo Water Block Sealant

Membrane Conditioner/Cleaner: A solvent-based agent used to clean exposed or contaminated seams prior to heat welding to remove any residue that may compromise lap welding.

Parasolo Membrane Conditioner by Siplast, Inc.

Membrane Separation Pad: A non-woven polyester mat, having a weight of 3 oz./yd. (85 g/m2), used beneath mechanically attached single-ply membrane in re-cover applications or between single-ply flashing membrane and flashing substrates contaminated with asphalt residue.

Parasolo Poly Separation Layer by Siplast, Inc.

PVC Membrane Flashing Accessories

Outside Corner Flashing: A molded PVC membrane having a thickness of 0.075 inch (1.9 mm), designed to accommodate outside corners of base and curb flashing details. The molded flashing component shall be hot-air welded directly to the specified PVC membrane.

>	Parasolo PVC Outside Corner by Siplast, Inc.

Inside Corner Flashing: A molded PVC membrane designed to accommodate inside corners of base and curb flashing details. The molded flashing component shall be hot-air welded directly to the specified PVC membrane.

>	Parasolo PVC Inside Corner by Siplast, Inc.

Fluted Corner Flashing: A molded PVC membrane having a thickness of 0.055 inch (1.4 mm), designed to accommodate corners of base and curb flashing details having dimensions that cannot be addressed using standard pre-formed PVC inside or outside corner flashing components. The molded flashing component shall be hot-air welded directly to the specified PVC membrane.

>	Parasolo PVC Fluted Corner by Siplast, Inc.

Flashing Strip: An 8-inch wide molded PVC membrane strip having a thickness of 0.045 inch (1.14 mm), designed for general repairs and to strip-in PVC coated metal flanges.

>	Parasolo PVC Flashing Strip by Siplast, Inc.

Termination Bar with Receiver: An extruded aluminum termination bar with rounded edges and an angled sealant receiver and lower leg bulb stiffener, having factory-punched, slotted holes spaced on 6-inch (152 mm) centers.

>	Parafast Lip Termination Bar 6 Inch on Center by Siplast, Inc.

Termination Bar with Receiver: An extruded aluminum termination bar with rounded edges and an angled sealant receiver and lower leg bulb stiffener, having factory-punched, slotted holes spaced on 8-inch (203 mm) centers.

>	Parafast Lip Termination Bar 8 Inch on Center by Siplast, Inc.

Flat Termination Bar: A flat, extruded aluminum termination bar with rounded edges, having factory-punched, slotted holes spaced on 6-inch (152 mm) centers.

>	Parafast Flat Termination Bar 6 Inch on Center by Siplast, Inc.

Flat Termination Bar: A flat, extruded aluminum termination bar with rounded edges, having factory-punched, slotted holes spaced on 8-inch (203 mm) centers.

>	Parafast Flat Termination Bar 8 Inch on Center by Siplast, Inc.

Pre-formed Vent Boots: A molded PVC membrane used to flash pipe and conduit penetrations having a diameter of 1 to 6 inches (25 to 152 mm). The pre-formed vent boots shall be hot-air welded directly to the PVC roof membrane.

>	Parafast PVC Conical Pipe Boot by Siplast, Inc.

Cover Patches at T-Joints: A molded PVC membrane used to reinforce the T-joints of the specified PVC membrane system.

>	Parasolo PVC T-Joint Cover Patch by Siplast, Inc.

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT MEMBRANE PERIMETER FASTENERS.

Keep the appropriate plate listed under Item 1 based on perimeter fastener selection.

Membrane Plates: Membrane plates shall be FM Approved, and/or approved by the manufacturer of the primary roofing products. The plates shall be used with the specified seam fasteners to provide attachment required to meet the specified uplift performance. Acceptable membrane plate manufacturers are listed below.

Membrane Plates: Membrane plates shall be FM Approved, and/or approved by the manufacturer of the primary roofing products. The plates shall be used with the specified seam fasteners to provide attachment required to meet the specified uplift performance. Acceptable membrane plate manufacturers are listed below.

Barbed plates used in conjunction with the fastener shall be a metal type having a minimum 2.375 inch diameter, as supplied by the fastener manufacturer.

>	Parafast XHD Plate by Siplast; Dallas, TX

Barbed plates used in conjunction with the fastener shall be a metal type having a minimum 2.75 inch diameter, as supplied by the fastener manufacturer.

>	Parafast SXHD Plate by Siplast; Dallas, TX

Barbed plates used in conjunction with the fastener shall be a metal type having a minimum 2.375 inch diameter and designed for use with a specialized stand-up attachment tool.

>	Parafast Eyehook AccuSeam Plate by Siplast; Dallas, TX

>	AccuSeam Plate by OMG; Agawam, MA

SUBSTRATE BOARD

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT A SUBSTRATE BOARD/THERMAL BARRIER.

TEMPORARY ROOF/VAPOR RETARDER

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT A TEMPORARY ROOF/VAPOR RETARDER.

ROOF INSULATION

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT A ROOF INSULATION SYSTEM.

INSULATION COVER PANEL

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT A COVER PANEL.

INSULATION ACCESSORIES

Delete Items A and B below if a mechanically attached substrate panel or mechanically attached insulation system is not specified.

Insulation Fasteners: The insulation fasteners shall provide attachment required to meet the specified uplift performance and to restrain the insulation panels against the potential for ridging.

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT INSULATION FASTENERS.

Keep the item below if specifying insulation adhesive. Delete items 1 through 5 as necessary to meet the project requirements.

Insulation Adhesive: A single or dual component low-rise polyurethane foam adhesive designed specifically for the adhesion of roof insulation to substrate, as well as subsequent layers of insulation. Acceptable manufacturers are as follows:

Para-Stik by Siplast, Inc.

Parafast Insulation Adhesive by Siplast, Inc.

Insta Stik Quik Set Commercial Roofing Adhesive by DuPont, Inc.

OlyBond500 Insulation Adhesive by OMG, Inc.

Millennium One-Step Insulation Adhesive by H. B. Fuller

Insulation Cant Strips: A cant strip composed of expanded volcanic minerals combined with waterproofing binders, meeting ASTM C728 criteria. The top surface shall be pre-treated with an asphalt based coating. The face of the cant shall have a nominal 4 inch dimension.

Tapered Edge Strips: A tapered panel composed of expanded volcanic minerals combined with waterproofing binders. The top surface shall be pre-treated with an asphalt based coating. The panels shall have a dimension sufficient to provide for a smooth transition and provide proper support for the membrane layer or subsequent layer of insulation when there are transitions of 1/4 inch or greater.

WALKWAYS

Walktread: A prefabricated, extruded and embossed PVC protection pad with a skid-resistant surface, having a thickness of 1/8 inch (3.2 mm) and a width of 30 inches (76.2).

Parasolo Walkway by Siplast, Inc.

PART 3 - EXECUTION

EXAMINATION

Substrate Qualification: The installing contractor shall examine all substrates where the specified roofing and flashing system will be applied and confirm their suitability to receive the specified roofing materials.

PREPARATION

Sweep or vacuum all surfaces, removing all loose aggregate and foreign substances prior to commencement of roofing.

Keep item B if specifying a tear-off, partial tear-off, or re-cover. Delete numbered conditions, as necessary to match project conditions.

Remove all of the following existing conditions:

Surface gravel

Roof membrane

Insulation

Base flashings

Edge metal

Flanged metal flashings

Cants

Walkways

Nonfunctional penetrations/curbs

Drain assemblies

Vapor retarder

Metal trim, counter flashing

Primer for Self-Adhesive Membrane: Apply the specified tacky primer by roller or spray in an even film. Refer to the manufacturer’s literature for the approved rate of application over various substrate types. Allow the primer to dry until it leaves a slightly sticky surface without transfer when touched. Cutting or alteration of the primer is not permitted.

Asphaltic Primer: Prime metal and concrete and masonry surfaces with a uniform coating of the specified asphalt primer according to the manufacturer’s published application rate. Cutting or alteration of the primer is not permitted.

INSTALLATION OF ROOFING, GENERAL GUIDLEINES

Keep item A, as appropriate, for cold adhesive and/or hot asphalt application.

Adhesive Application: Apply membrane cold adhesive by roller, squeegee or spray unit in a smooth, even, continuous layer without breaks or voids. Utilize an application rate for each ply as published by the roof membrane manufacturer. Double the adhesive application rate at the end laps of granule surfaced sheets. Where solvent-based adhesive is applied, refer to the manufacturer’s inter-ply flashing detail at the locations that are to receive the specified catalyzed acrylic resin primer/flashing system. Cutting or alteration of the adhesive is not permitted.

General Appearance: Ensure that the finished roofing application has an aesthetically pleasing overall appearance and is acceptable to the Owner.

INSTALLATION OF SUBSTRATE BOARD

Install substrate panels with end joints offset and edges in moderate contact in accordance with the panel manufacturer's requirements. Install only as many panels as can be made watertight within the same work day.

Select the following item when the field zone fastening frequency is at least 1 per 3 square feet (ie. 11 or more fasteners per 4 ‘ x 8’ panel).

Mechanically attach the panels to the substrate, using the specified fasteners, at a rate of 1 fastener per [--] square feet of panel area ([----] per 4' x 8' panel). Increase the fastening frequency by 50% at the perimeter of the roof and mechanically attach the corners at the rate of 1 fastener per 1 square foot of panel area (32 per 4-foot by 8-foot panel).

Select the following item when the field zone fastening frequency is less than 1 per 3 square feet (ie. 8 to 10 fasteners per 4 ‘ x 8’ panel).

Mechanically attach the panels to the substrate, using the specified fasteners, at a rate of 1 fastener per [--] square feet of panel area ([----] per 4' x 8' panel. Mechanically attach the perimeter of the roof at the rate of 1 fastener per 2 square feet of panel area (16 per 4-foot by 8-foot panel) and the corners at the rate of 1 fastener per 1 square foot of panel area (32 per 4-foot by 8-foot panel).

INSTALLATION OF TEMPORARY ROOF/VAPOR RETARDER

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT TEMPORARY ROOF/VAPOR RETARDER APPLICATION METHOD.

INSTALLATION OF INSULATION AND COVERBOARD

Install insulation panels with end joints offset with edges in moderate contact in accordance with the insulation manufacturer's requirements. Where insulation is installed in two or more layers, stagger joints between layers. Maintain a maximum panel size of 4 feet by 4 feet for polyisocyanurate / fiberboard insulation applied in insulation adhesive or hot asphalt. Install only as much insulation as can be made watertight within the same work day.

Crickets: Construct crickets of tapered insulation panels in a layout as indicated on the roof plan.

Tapered Edge at Transitions: Field-cut, shape and install tapered edge strip at transitions of 1/4 inch or greater between substrate components to provide a smooth transition and proper support for the subsequent insulation layer or membrane/flashing system components.

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT INSULATION ATTACHMENT TO MEET THE SPECIFIED WIND UPLIFT REQUIREMENTS.

APPLICATION OF ROOFING MEMBRANE

Select parallel or perpendicular sheet orientation in Item A below. Also, select application method for membrane base ply below.

Apply all layers of roofing with side laps running [parallel/perpendicular] to the direction of the slope. Exert sufficient pressure on the roll during application to ensure prevention of air pockets, wrinkles, creases or fishmouths. Refer to the manufacturer’s guidelines for maximum sheet lengths and special fastening of the head laps where the roof deck slope exceeds 1/2 inch per foot.

HOVER CURSOR HERE AND RIGHT CLICK TO SELECT MEMBRANE APPLICATION METHOD.

Flashing Application - General: Locate all penetrations at least 24 inches from curbs, walls, and edges to provide access for proper application of the specified flashing materials. Reinforce all coated metal and membrane flashing corners using preformed corners or non-reinforced membrane. Hot-air weld all flashing membranes, accessories, and coated metal to have a minimum 2-inch (51 mm) hand-welded or minimum 1.5-inch (38 mm) automatic machine-welded lap. Overlap side and ends with the adjacent courses of the specified protection layer by a minimum of 6 inches. Reference the manufacturer’s standard details for all flashing conditions.

Flashing Application - Coated Metal Flashings: Form coated metal flashings in accordance with SMACNA guidelines and the manufacturer’s published specifications and details. Reference the manufacturer’s published details for all flashing conditions.

Reinforced Fleece-Back Flashing Application: Pre-cut the flashing membrane to the required size. Lay the pre-cut flashing sheets flat on the roof surface. Position a 6-inch wide strip of the specified flashing stripping membrane at the bottom of the sheet and weld it into place. Flip the flashing sheets upside down adjacent to the flashing substrate. Apply the specified low-rise foam adhesive in a “spatter pattern” to the underside of the membrane to yield a heavily textured, even coating of approximately 1/4- inch (6.2 mm) to 1/2 inch (12 mm) nominal thickness height on the peaks of the spattered adhesive. Extend the adhesive in a full coating completely up to the edge of lap areas, taking care to keep the adhesive off of laps that will be heat welded. Allow the adhesive to rise and apply the membrane to the flashing substrate before the adhesive begins to “skin” over. Roll the membrane to ensure complete bonding of the adhesive between the flashing substrate and membrane and secure the top of the flashing membrane in accordance with the manufacturer’s requirements. Weld laps over adjacent flashing membrane and weld the flashing stripping membrane to the roof membrane surface.

Reinforced Smooth Flashing Application (only for use when asphalt residue is not present): Apply the solvent-based bonding adhesive to both the underside of the membrane and the substrate at the rate published by the manufacturer. Allow the bonding adhesive to dry until tacky to the touch before application of the flashing membrane. Mate the membrane to the flashing substrate coated with the specified adhesive. Roll the membrane to ensure complete bonding of the adhesive between the flashing substrate and membrane. Heat weld the laps and terminate the top of the flashing membrane in accordance with the manufacturer’s standard details.

Flashing Application - Adhered Un-Reinforced Membrane Flashing: Apply un-reinforced membrane at field-fabricated penetrations or as reinforcement flashings in locations where preformed corners and pipe boots cannot be properly installed. Apply un-reinforced flashing in strict accordance with the published details and requirements of the roof membrane manufacturer. Allow the bonding adhesive to dry until tacky to the touch before application of the flashing membrane.

Catalyzed Acrylic Resin Flashing System (at penetrations): Install the liquid-applied primer and flashing system in accordance with the membrane system manufacturer’s printed installer’s guidelines and other applicable written recommendations as provided by the manufacturer.

Water Cut-Off: At end of day's work, or when precipitation is imminent, construct a water cut-off at all open edges. Construct cut-offs to withstand protracted periods of service without leaking using materials and methods compatible with the specified roof membrane system. Cut-offs must be completely removed prior to the resumption of roofing.

APPLICATION OF SEALANT

Apply a smooth continuous bead of the specified sealant at the exposed finish ply edge transition to metal flashings incorporated into the roof system.

ROOF SYSTEM INTERFACE WITH RELATED COMPONENTS

Walkway/Protection Pads: Install walkway rolls at all roof access locations and other designated locations including roof-mounted equipment, work locations and areas of repeated rooftop traffic. Cut the walktread into maximum 5 foot lengths and allow to relax until flat. Use a spacing of 6 inches between sheets to allow for proper drainage. Heat-weld walkway rolls to the roof membrane surface continuously around the perimeter of the roll.

Roof Drains: Fit drains with clamping rings and strainer baskets. Provide a minimum 36-inch by 36-inch sump and a slope within the sump not exceeding 4:12. Extend the roof membrane over the drain opening and cut a hole in the membrane directly over the opening, leaving 1 inch of membrane to extend past the drain flange into the drain opening. Punch holes through the roofing membrane at drain bolt locations. Set the membrane in a full bed (use minimum one full tube) of the specified water block sealant over the drain flange prior to securement of the clamping ring. Field welds cannot pass within 9 inches of the camping ring or within the drain sump itself. Reference the manufacturer’s published details for appropriate treatment of roof drain conditions.

Termination Bars(securement at top of flashing membrane): Prior to mechanical attachment of the specified termination bar with receiver, apply the specified water block sealant on the flashing substrate behind the membrane where the termination bar will be installed. Mechanically attach termination bars using the specified fasteners. Apply a continuous bead of the specified sealant at the top of termination bar sealant receiver lip.

Termination Bars (securement of roof membrane at base of walls or curbs): Prior to mechanical attachment of the specified flat termination bar, apply the specified water block sealant on the flashing substrate behind the membrane where the termination bar will be installed. Mechanically attach flat termination bars using the specified fasteners.

FIELD QUALITY CONTROL

Notify the manufacturer of job completion in order to schedule a final inspection date. Hold a meeting at the completion of the project, attended by all parties that were present at the pre-job conference. A punch list of items required for completion shall be compiled by the manufacturer's representative. Complete, sign, and send the punch list form to the manufacturer's headquarters.

Leave all areas around job site free of debris, roofing materials, equipment and related items after completion of job.

Complete all post installation procedures and meet the manufacturer's requirements for issuance of the specified guarantee.

END OF SECTION 07 54 19