DURO-LAST SHINGLE PRINTED MEMBRANE SPECIFICATION

SPECIFICATION

DURO-LAST SHINGLE PRINTED

MEMBRANE SPECIFICATION

“Duro-Last” and “The World’s Best Roof” are registered marks owned by Duro-Last, Inc. 2009

www.duro-last.com 1 of 13 800-248-0280

TABLE OF CONTENTS SECTION 1---GENERAL Page

Introduction 2 Requirements 2 Membrane Description 2 Tool Requirements 3 Drainage and Slope 3 Delivery, Handling, Storage 3 Substrate Separation / Chemical Resistance 4 Availability 4

SECTION 2---QUALITY ASSURANCE Pre-job Inspection 4 Fastener Selection and Deck Combinations 5 Fastener Spacing Table 6

SECTION 3---IMPLEMENTATION Roof Preparation 7 Insulation Selection and Installation 8 Membrane Installation 9 Ridge Vent Installation for Hip and Ridge Roofs 11 Accessories 11 Cautions and Warnings 13



DURO-LAST SHINGLE-PRINTED SPECIFICATIONS

MECHANICALLY FASTENED SHINGLE- PRINTED ROOF SYSTEM

Introducing the Duro-Last “Designer Series” printed roof membranes. The Duro-Last shingle-printed membrane is ideal for applications where an aesthetic building appearance is desired but conventional shingles are not practical due to low-slope or other restrictions. The membrane surface provides a shingle look, but without the dimensional aspect of standard roof shingles. The following is information that is needed to install the Duro-Last Shingle-Printed Roofing System. Each installation should be in compliance with the detail drawings, instructions, material descriptions, and other information stated herein.

REQUIREMENTS

1. The Duro-Last Shingle-Printed material is for installation on commercial and industrial buildings. Duro-Last will issue a “material only” warranty on the shingle-print membrane installed on residential buildings.

2. Proper slip sheets must be installed between the Duro-Last membrane and the substrate. 3. A Duro-Last Technical Representative must inspect the Duro-Last roofing system for compliance with the

Duro-Last specifications before a commercial/industrial warranty is issued. Note: Duro-Last does not perform destructive testing unless visual inspection necessitates a need for further investigation.

4. All materials used in the installation of the Duro-Last Roofing System must be products of Duro-Last or alternate products pre-approved in writing by the Duro-Last Engineering Services Department.

5. The Duro-Last contractor is responsible for following all applicable building, plumbing and electrical codes. Fastening for buildings that are located in high wind zones 110 mph or greater and/or those equal to or greater than 40 feet in height must be fastened no more than 12 inches on center and must have fastener tab/row spacing’s no greater than 60 inches on center. In addition, the roof system may require additional securement tabs near the roof edge, spaced 28 inches on center. For buildings that are greater than 40 feet in height or located in a high wind zone, contact the Duro-Last Engineering Services Department at 800-248-0280.

SECTION 1---GENERAL Due to the unique nature of Duro-Last shingle print membrane, Duro-Last cannot guarantee delivery within 5 business days. Please call the Duro-Last Sales Department. MEMBRANE DESCRIPTION

1. The Duro-Last membrane is comprised of a polyvinyl chloride polymer blend, which is reinforced with a high strength weft-inserted polyester scrim having a thread pattern of 18 x 14 threads per inch. Refer to the Spec Data Sheets in the “Product Data Sheets” section for a listing of all of the test results and physical properties of the membrane.

2. The 50 mil (1.25 mm) thick Duro-Last single-ply roof membrane has a system weight that is approximately 0.32 lb/ft2 (1.56 Kg/m2). Membrane is shipped as roll goods material only in roll widths of 64 inches. Rolls are available in two lengths: 75 feet and 150 feet. The maximum allowable roll length is 150 feet. Half rolls, 32 inch wide, are available on request to insure that they are made from the same lot.

3. The membrane is printed with membrane compatible inks overlaid by an acrylic elastomeric coating. The printing is designed to simulate a shingle or shake-style roof. The pattern is an 18 inch x 32 inch repeating pattern. The 32 inch pattern repeats left to right across the 64 inch width of the roll good material. The pattern is designed to allow for a 4 inch overlap. It is available in both Sandstone Tan and Slate Gray colors.

APPLICABILITY The Duro-Last Shingle-Printed Roofing System consists of the Duro-Last membrane, fasteners, prefabricated corners, parapets, stacks, curb flashings, vents, and other related Duro-Last-approved products necessary for the proper and warrantable installation of the Duro-Last Shingle-Printed Roofing System. Note: It is the responsibility of the installing contractor to follow all applicable building codes. Additionally, Duro-Last is NOT responsible for ventilation requirements.




TOOL REQUIREMENTS The authorized Duro-Last contractor should have the following tools, which are necessary for the efficient and proper installation of the Duro-Last Shingle-Printed Roofing System.

A. Hand welders (hot air) with a spare heating element (Optional: Automatic welder) B. Silicone hand roller C. Variable speed power screw driver with reverse D. Electric hammer drill w/depth gauge E. P-3 screwdriver tips for screws F. R-3 square drive tips for concrete screws G. Measuring tapes (100’ and 25’), chalk line, markers, lumber crayon H. Metal snips, hacksaw, keyhole saw, hammers, scissors, utility knives with retractable blades I. Vise clamps, nail aprons, caulk gun, screw drivers J. Detergent-based cleaning fluid and rags K. 2” flat chisels, pry bar L. Ladders M. Tack claw N. Grip-Pull® O. Tarps P. Pull tester Q. Panduit bander R. Extension cords - cord length of 100’, #12/3 wire w/ground S. Core cutter T. Ground fault interrupter U. Equipment necessary to raise materials to the rooftop V. Safety equipment (such as fall protection, safety glasses, etc.)

DRAINAGE/SLOPE Duro-Last warrants its membrane even where ponding water accumulates. Duro-Last has found no adverse effects on its membrane because of a lack of positive drainage, however, good roofing practices incorporate the use of positive drainage for the safety of the structure. The installing contractor is responsible to make sure roof drainage meets local building code requirements. WEATHER CONSIDERATIONS The Duro-Last membrane is designed to perform in all types of weather. It is regularly subjected to DSET, EMMAQUA exposure and low temperature cracking (ASTM D-2136) testing (See Physical Properties Data in the General Section). Installation of the Duro-Last membrane is limited only by the exposure limitations of the installers. It is Duro-Last’s recommendation that installation be performed within the temperature range of -15ºF to 115ºF. DELIVERY A complete Duro-Last Roofing System and related materials will be delivered in the original packaging and with shipping labels intact. Containers will be labeled with manufacturers/supplier name, product name, and identification. Each shipment should be checked for damages and/or shortages. The freight agent must note damaged materials and/or shortages on the freight bill. Concealed damage must be reported to the freight agent immediately. Materials damaged in shipping, handling or storage should not be used. HANDLING Once the Duro-Last Roofing System is delivered to the job site, the contractor is responsible for its handling and installation of the roofing system. Adequate personnel and equipment should be available to safely lift and place the Duro-Last Roofing System onto the rooftop. Duro-Last membrane must be placed on the roof near load-bearing members and in a manner convenient to final placement. STORAGE Roofing materials should never be stored where water can pond or where water can run down from higher elevations onto the materials.




THINGS TO KNOW SUBSTRATE SEPARATION The Duro-Last membrane is defect-free when it leaves the factory. Certain substrates are not compatible with the Duro-Last membrane and may cause premature membrane failure. Over the substrates listed below, install a minimum 3 mil polyethylene or polypropylene slip sheet prior to the installation of the Duro-Last membrane.

Acrylic Coatings Extruded Polystyrene Modified Bitumen Shingles Aluminum Coated Asphalt

Granulated Cap Sheet Old Duro-Last Roofs TPO (Thermoplastic Polyolefin)

Coated or Smooth Asphalt

Hypalon (CSPE) Polyurethane Sprayed Urethane Foam (smooth)

Expanded Polystyrene

Mineral Surfaced Cap Coal Tar Pitch PVC/CPA Membranes

The Duro-Last membrane is compatible with the following substrates, and no slip sheet is required.

CPE Roofing GP DensDeck® and DensDeck® Prime Polyisocyanurate Gypsum USG SECUROCK® Gypsum-Fiber Roof Board Glass Fiber Boards EPDM (clean) Lightweight\Structural Concrete Decks (Smooth) Cellular Glass Boards Wood Decks Pre-stressed Concrete Decks

CHEMICAL RESISTANCE As with any printed surface of any type, in order to keep the newness look of the shingle print, it is advisable to keep the shingle print membrane from exposure to any and all chemicals unless approved by the Duro-Last Engineering Services Department. CAUTION ON LOT DIFFERENCES Be sure to order enough material for each project, and do not use excess material on other projects since the color may vary from one lot to another. Otherwise, the completed results may not have the aesthetic look for a shingle pattern. PAINT APPLICATION The Duro-Last shingle-printed membrane or vinyl edging may not be painted.

SECTION 2---QUALITY ASSURANCE

PRE-JOB INSPECTION CORE CUTS When re-covering an existing roofing system, the authorized Duro-Last contractor is responsible for conducting an inspection of the proposed job site roof conditions, determine the needed fastener type and length, moisture content of the existing roofing system, and note damaged areas to be repaired prior to installation of the Duro-Last Roofing System. The Duro-Last contractor is responsible for performing a series of core cuts to determine and verify the above information. The Duro-Last contractor and/or building owner is responsible for the repair of all core cuts. Duro-Last does not approve the practice of roofing over existing roofing systems that contain excess water. Excess water is defined as water observed within a core cut or moisture squeezed from the core sample taken. PULL TESTS Fastener pull-out tests must be conducted on the roof deck with approved fasteners to verify the integrity of the deck and to establish fastening patterns that meet the requirements of Duro-Last specifications. Contact the Duro-Last Engineering Services Department at 800-248-0280 with any questions.




It is the responsibility of the installer to make sure pull-out tests are taken on-site by the fastener manufacturer or the Duro-Last contractor. The sections of decking where integrity is in question should be the locations for the tests. Values must be documented on a roof drawing, locating the test pulls and pullout test values. In situations where new construction prevents on-site pull-out tests, a pre-assembled deck representing the proposed deck type should be constructed and tested. The number of pull-tests required will be as follows: perform a minimum of 10 pull tests for up to 50,000 square feet and five additional pull tests for each additional 50,000 square feet or portion thereof, on each project. Areas of low pull-test results will require additional pull tests. FASTENER SELECTION AND DECK COMBINATIONS Note: Duro-Last highly recommends using the metal 2.4” cleat plate on membrane and insulation attachment because of its low profile. The fasteners used to attach insulation, cover board and Duro-Last membrane must be supplied by Duro-Last. The following table summarizes the appropriate fasteners to use for different deck types. If a fastener type is needed that is not listed below, the Duro-Last Engineering Services Department must approve its use, in writing, prior to installation.

Deck Type Fastener Type Notes Steel

Duro-Last HD Screws Duro-Last XHD Screws

Must penetrate a minimum of 1 in. below the top surface of deck.

Wood Duro-Last HD Screws Duro-Last XHD Screws

Must penetrate a minimum of 1 in. below the top surface of deck.

Structural Concrete Duro-Last Concrete Nail Duro-Last Concrete Screw Duro-Last HD Screws Duro-Last XHD Screws

Must penetrate a minimum of 1 in. below the top surface of deck. Pre-drill a minimum of 1/2 in. deeper than the required depth of the fasteners using a 3/16 in. bit.

Pre-drill required for auger fasteners. Use a 7/16–9/16 in. bit.

* Must penetrate a minimum of 1 1/2 in. below the top surface of deck. * Factory Mutual-designed systems require minimum of 2 in. penetration.

Gypsum

Auger Fastener* Liquid Auger Fastener** Auger Fastener* Liquid Auger Fastener**

** Liquid Augers must penetrate a minimum of 2 in. below the top surface of the deck. Do not pre-drill. * Must penetrate a minimum of 1 1/2 in. below the top surface of deck. * Factory Mutual-designed systems require minimum of 2 in. penetration.

Cementitious Woodfiber (Tectum)

Auger Fastener* Liquid Auger Fastener**

** Liquid Auger must penetrate a minimum of 2 in. beyond the top surface of the deck. Pre-drill required. Use a 7/16–9/16 in. bit. * Must penetrate a minimum of 1 1/2 in. below the top surface of deck. * Factory Mutual-designed systems require minimum of 2 in. penetration.

Lightweight Concrete Auger Fastener* Liquid Auger Fastener**

** Liquid Auger must penetrate a minimum of 2 in. below the top surface of the deck.




Walls and Curbs Notes

Cinder and Concrete Block

Zinc Plated Metal Anchors Duro-Last Concrete Screw Duro-Last Concrete Nail Duro-Last HD Screws Duro-Last XHD Screws

Must penetrate a minimum of 1 in. below the top surface. Pre-drill a minimum of 1/2 in. deeper than the required depth of the fasteners using a 3/16 in. bit (1/2 in. for metal anchors).

When determining what plates to use and where to use them, refer to the following table:

2" Poly-Plate 2.4” Cleat Plate 3" Square Metal Insulation Plate Fastening Tabs Yes Yes No No Parapet Flashings Yes Yes Yes No Penetrations Yes Yes Yes No Insulation Yes Yes Yes Yes

Note: Duro-Last highly recommends using the metal 2.4” cleat plate on membrane and insulation attachment because of its low profile.

FASTENER SPACING TABLES* – FOR USE WITH ALL DECK TYPES

*These tables may not be used for buildings located in special wind regions, in wind zones greater than 110 mph or buildings with an eave height greater than 40 feet. Buildings with these criteria must have a roof system designed by the Duro-Last Engineering Services Department. The tables above indicate the enhancement in the FIELD AREA only. Membrane attachment on Duro-Last designed roof systems, buildings in special wind regions or with excessive building heights (40’ or taller), and on all Factory Mutual-insured buildings requires special field, perimeter, and corner fastening. The width of the perimeter area is defined as being the lesser of either 40% of the building height at the eaves or 10% of the overall plan width of the building and/or roof area. The perimeter must never be less than four feet wide. Feel free to contact the Duro-Last Engineering Services Department at 800-248-0280 for additional design information.

Fastener Spacing (Inches)

Fastener Pull-out

Resistance (Lbs) 60" Tabs 28" Tabs

450 18" O.C. 24" O.C. 375 15" O.C. 18" O.C. 350 15" O.C. 18" O.C. 325 12" O.C. 18" O.C. 300 12" O.C. 18" O.C. 275 12" O.C. 18" O.C. 225 9" O.C. 18" O.C. 210 6" O.C. 18" O.C. 175 6" O.C. 15" O.C. 150 6" O.C. 15" O.C. 140 N/A 12" O.C.

60 P

SF

Sys

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Des

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Tab

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Fie

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139 OR LESS

N/A N/A

Fastener Spacing (Inches)

Fastener Pull-out

Resistance (Lbs) 60" Tabs 28" Tabs

450 12" O.C. 18" O.C. 375 9" O.C. 18" O.C. 350 6" O.C. 18" O.C. 325 6" O.C. 18" O.C. 300 6" O.C. 15" O.C. 275 6" O.C. 15" O.C. 225 6" O.C. 12" O.C. 210 N/A 12" O.C. 175 N/A 9" O.C. 150 N/A N/A 140 N/A N/A

90 P

SF

Sys

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Des

ign

Tab

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Fie

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rea

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139 OR LESS

N/A N/A




SECTION 3---IMPLEMENTATION ROOF PREPARATION RE-COVER – Built-up Roofs (BUR)

1. If the BUR is gravel surfaced and the pea gravel or crushed stone is 1/4-3/8 inches (6 mm - 10 mm) in size, it must be leveled and maintained at 4 lbs./sq. ft. (20 Kg/m2). Then a minimum 3/8 inch (10 mm) Duro-Last supplied underlayment or 1 inch (25 mm) thick insulation must be used. If the loose stone on an old BUR is vacuumed or swept, a separator sheet of a minimum 3/8 inch (12 mm) thickness, such as a Duro-Last approved re-covery board, must be used. CAUTION: Removing more than the loose gravel may affect the resulting fire rating. Consult the Duro-Last Engineering Services Department at 800-248-0280 for fire-rated assemblies.

2. If the BUR is a smooth or granular surfaced application and is free of sharp edges and debris, then it can be re-covered with a minimum of a 3 mil polyethylene sheet, though a 3/8” underlayment is recommended.

3. EPS insulation cannot be used over coal tar pitch without a separator sheet between the coal tar pitch and the insulation as well as between the membrane and the insulation. Duro-Last underlayments are approved for direct application over aged coal tar pitch roofs.

4. When roofing over asphalt or coal tar roofs (including tear-off), an approved separator sheet must be used. Asphalt-based products are incompatible with the Duro-Last roofing membrane and require separation. Note: In the event that the Duro-Last membrane becomes soiled with roofing asphalt, the affected membrane must be cleaned immediately using approved cleaners and procedures. If the asphalt cannot be properly cleaned from the membrane, the affected membrane must be removed and new membrane installed. If this is not practical, overlay the affected area with an approved separator sheet and install new membrane. Extreme caution should be taken if you are doing a tear-off while installing the membrane.

RE-COVER – Single-Ply Roofs

1. All existing single-ply roofing membrane must be cut free from the entire roof perimeter, cut free around all penetrations, and cut in between fastener rows prior to the installation of the Duro-Last membrane. When re-roofing after a tear-off, caution should be used to prevent the Duro-Last membrane from contacting incompatible materials. (See Page 4 within this section for approved substrates)

2. If the existing system is mechanically fastened, there is often a problem with loose fasteners. Because of this problem, cut the membrane open and remove all loose fasteners before installing the separator sheet.

3. If a PVC membrane has been installed directly over styrene insulation without a separator sheet, then the old membrane must be removed, damaged insulation replaced, and an approved slip sheet installed.

4. If the existing membrane is ballasted and the Duro-Last membrane is to be mechanically fastened, it is necessary to do fastener pull-out tests on the deck. Also, the type of insulation and its density needs to be determined to ensure that the insulation will meet Duro-Last requirements. (See Substrate Separation within the “General Specifications” section for approved substrates). Be aware that if the existing insulation is "loose-laid" it must be fastened with an approved fastening pattern. (See Detail 1020)

RE-COVER – Metal Roof Re-cover/Retrofit

1. The metal roof panel must be clean, smooth, free of sharp edges and loose foreign material. Damaged areas and other factors affecting the installation of the Duro-Last Roofing System must be repaired prior to the installation of the membrane.

2. A metal roof panel must be separated from the Duro-Last membrane by at least a 15/32 inch (12 mm) hardboard (gypsum, plywood, or oriented strand board (OSB)) or 1 inch (25 mm) rigid insulation. Duro-Last fan fold insulation may be used if the flutes are completely filled. The gaps between the ribs of the metal and the insulation fill can not exceed 1/4 inch in width.

3. Flute filler material must consist of an approved insulation (See detail 8000 in “Mechanically Fastened”). Flute filler must be mechanically fastened with Duro-Last fasteners and plates, as needed, to hold the insulation in place.




4. Insulation/re-cover board must be neatly fitted to the roof deck and its penetrations. For mechanically attached systems, 4’ x 8’ boards must have a minimum of five fasteners/distribution plates. The insulation/re-cover board must be the minimum thickness required by the manufacturer to span any gaps between the flute filler and the center of the rib. Gaps between insulation/re-covery boards cannot exceed 1/4 inch (6 mm) in width. No more insulation/re-covery board should be installed than can be covered with membrane and completed before the end of the day’s work or before the onset of inclement weather. Duro-Last fasteners and Duro-Last plates, as well as approved fastening patterns, must be used for attachment of all insulation/re-cover board. Contact the Duro-Last Engineering Services Department at 800-248-0280 with any questions.

5. High-density wood fiberboard is acceptable on metal building re-covers when the building slope is at least 1 inch vertical for every 12 inches horizontal. High-density wood fiberboard will not be accepted as flute filler.

6. Plywood is acceptable to re-cover metal roofs. The minimum thickness, if it is being used as recover board, is 15/32 inch. Membrane fasteners must penetrate through both the plywood and the existing metal roof to meet local building code.

7. If plywood will be acting as the new substrate for membrane attachment, the plywood must be a minimum of 9/16-inch (14 mm) thick and a pull-test must be conducted on the new lumber to determine the proper lap spacing and attachment along the tab. Contact the local building authority to determine compliance of deck attachment to the building structure. Note: It is the responsibility of the contractor to ensure that the weight requirements of the building are not exceeded when installing additional materials over pre-engineered buildings.

8. When installing the Duro-Last membrane over light-gauge metal with low pull-out values, a mock assembly should be tested to ensure that the fastener is drawn into the stress distribution plate without stripping (popping) out the metal panel. In the event that the metal panel strips out, membrane fastening to the purlins may be required to attach the membrane to the support structure beneath.

NEW CONSTRUCTION

1. All concrete surfaces must be troweled smooth. If the concrete surface is not smooth, a minimum 3/8 inch fan-folded underlayment is required.

2. The roof deck or existing roof system must be clean, smooth, free of sharp edges, and loose foreign material. Damaged areas and other factors affecting the installation of the Duro-Last Roofing System must be repaired prior to the installation of the membrane.

3. A metal deck must be separated from the Duro-Last membrane by at least 15/32 inch (12 mm) hardboard (gypsum, plywood, or oriented strand board) or 1 inch rigid insulation. It is the responsibility of the contractor to ensure that the selected insulation is adequate to span the flutes of the deck. If it is not, the flutes must be filled with an approved insulation. See "Insulation Selection and Installation" for further details.

4. All plywood surfaces must be smooth and free of all foreign material. Gaps between sheets of plywood should not exceed 1/4”. Prior to the installation of the membrane a 3 mil (min) separator sheet or duct tape must be installed over any H-clips, if they are used on any plywood decking.

INSULATION SELECTION AND INSTALLATION Insulation products must be neatly fitted to the roof deck and its penetrations. 4’ x 8’ insulation boards must have a minimum of five fasteners/distribution plates installed per board. No gap should exceed 1/4 inch (6 mm) in width. No more insulation products should be installed than can be covered with membrane and completed before the end of the day’s work or before the onset of inclement weather. Duro-Last fasteners and Duro-Last plates as well as approved fastening patterns are required for attachment of all insulation products. The minimum compression characteristics of insulation products as determined by ASTM D-1621 are as follows:

Polyisocyanurate products: 20 PSI (137.8 kPa) Fiberglass products: 16 PSI (110.3 kPa) Extruded polystyrene products: 25 PSI (172.3 kPa) Expanded polystyrene products: 15 PSI (124.1 kPa) and 1.5 PCF (24 Kg/m3) density (certified) and a

minimum 1 inch (25 mm) thick. Expanded polystyrene products covered with or laminated to a hardboard facer: 12 PSI (82.7 kPa) and

1.25 PCF (20 Kg/m3) densities and a minimum of 1 inch (25 mm) thick.




PERIMETER MEMBRANE INSTALLATION 1. The first tab on all perimeter roof sections that have tabs parallel with the roof edge or parapet wall,

must be between 24-36 inches from the roof edge or the wall. If a parapet wall exists that is greater than 24 inches tall, a perimeter tab can be placed 64 inches away from the roof edge (5 foot tab system only).

2. On buildings with multiple roof levels, such as equipment penthouses, a roof perimeter edge is defined as any roof having a vertical height difference of three feet or greater than the lower roof areas surrounding it. If this condition exists, that area must be treated as a separate roof and will require a perimeter tab. See note “1”.

3. On buildings located in high wind zones (greater than 110 mph) or on structures that are 40 feet or higher, additional wind tabs and enhanced fastener spacings may be required. Contact the Duro-Last Engineering Services Department at 800-248-0280 for additional information.

MEMBRANE INSTALLATION

1. The first row along the rake edge will be 32 inch wide if rule #1 under “PERIMETER MEMBRANE INSTALLATION” applies, following 64 inch wide rows positioned on the deck. The roof section is unrolled and mechanically fastened to the deck with approved fasteners and stress distribution plates (see Fastener Selection and Deck Combinations in Section 2), and is pulled taut throughout this process to remove any wrinkles. Once the first row of material has been fastened into place, the next roll can be positioned overlapping the previous row and allowing the distribution plate to be fully seated onto the tab and allow for a one and a half inch (1-1/2”) weld. This process is repeated until the entire roof section has been mechanically fastened to the deck and the above processes are repeated until the roof is completely covered.

2. The edge of securement plate (2 inch poly-plate or 2.4 inch cleat plate) must be installed flush with the outside edge of the roll.

3. The maximum allowable fastener spacing is 18 inches on center in rows 60 inches apart. Refer to the fastener spacing table.

4. If the membrane is attached to the support structure beneath the roof deck, special precautions must be taken. If the membrane is attached to a steel purlin structure, all fasteners must penetrate a minimum of 1 3/4 inches from the top of the purlin using Duro-Last purlin fasteners. If the membrane is being attached to a wood truss structure, all fasteners must penetrate a minimum of 1 inch from the top surface of the truss with approved Duro-Last fasteners.

5. If the membrane is to be fully adhered, then follow all of the requirements in the Fully Adhered section of this specification manual.

NOTE: Membrane is slippery when wet. Caution should be used when walking on sloped single-ply membrane. Use safety equipment for slip safety reasons.




TOP-TO-BOTTOM ALIGNMENT All shingle-printed material has an 18 inch (±⅛”) repeating pattern printed across the 64 inch wide roll of material (see below). Within the 18 inch repeating pattern are three rows of “shingles.” All the rows must be aligned with the same row of the next 18 inches repeating pattern. As an example, Row “A” will only align itself with row “A”, not row “B” or “C”. Note that the material can only be used in increments of 18 inches. If the roof section measures 18’-6” from ridge to eave, the adjoining material will need to be cut at 19’-6” to keep the repeat pattern the same when the next row gets started. Generally the material should be cut between the same two rows every time. SIDE-TO-SIDE ALIGNMENT The shingle-printed pattern is designed so that it can be cut into 32 inch wide pieces so that overlapping patterns can match. Below is an illustration of how the overlapping patterns will work. The print is designed for an overlap of 4 inches from each side of the 64 inch material. In the event that half panels are needed, the pattern will also allow for a 4 inch overlap from the center of the 64 inch material. NOTE: When placing membrane on the roof, the darker side (shadowed side) of each “shingle” row is to be the top of the “shingle”. However, the shingle will appear to be upside down.

A B C

32” 32”

4”4” 4” 4”

64 inches

18 in

ches




RIDGE VENT INSTALLATION FOR HIP AND RIDGE ROOFS Ridge vents should be used to ventilate dead air space to release hot moist air from attics. Follow the ridge vent manufacturer’s recommendation for hip and ridge slot preparation. For aesthetics, the ridge/hip material may be welded directly to the membrane over the hips or valleys where no ridge vent is used. A vent that conforms to the ridge and has a flat, solid surface facing out must be used for the purpose to provide an adequate surface for adhesion of the shingle print ridge pattern. Mechanically attach the ridge vent according to the ridge vent manufacturer’s recommendation and over the Duro-Last shingle print membrane. Make sure to cut a slot in the membrane under the ridge vent to release the trapped air. The slot in the membrane cannot exceed the width of the slot cut into the ridge. Install ridge vent end caps supplied by the manufacturer of the ridge vent or seal the ends from outside exposure. If possible, seal the ends caps with caulk to prevent pest infiltration. The Duro-Last shingle print ridge pattern can be plus or minus 1/4 inch the width or length of the ridge vent. Apply a straight bead pattern of Duro-Caulk Plus, keeping a minimum of 1/2 inch distance from the edge of the ridge vent. Press the shingle print ridge pattern onto the caulked surface of the ridge vent. Note: It is the responsibility of the installing contractor to follow all applicable building codes. Additionally, Duro-Last is NOT responsible for ventilation requirements. WOOD NAILERS

1. Wood nailers must be a #2 grade lumber or better, and must be fastened to the deck, wall, or existing secured nailer so that they resist 180 lbs. (2,643 N/m) of force per linear foot of nailer in any direction. Fasteners used to attach wood nailers must be spaced no greater than 18 inches apart. Wood nailers are required in any situation where 1 inch or greater of insulation is added to the roof perimeter edge. The top of the nailers must be flush with the top of the insulation. Wood nailers are not required at a change of plane such as the intersection between a parapet wall and the decking.

2. Duro-Last Engineering Services Department requires that only stainless steel fasteners be used on nailers and other lumber supports identified as being treated with ACQ or CA. The standard e-coated fastener should be used with untreated lumber used for nailers on all new construction. It is unlikely that treated lumber that is manufactured in 2003 or earlier would contain the copper based treatments; therefore e-coated fasteners would be acceptable.

HOT AIR WELDING

1. Position the membrane so that the top membrane overlaps the bottom membrane a minimum of four inches. Ensure the welding area is dry, clean and free of foreign material.

2. Duro-Last strongly recommends the use of a hand-held welder and silicone roller to weld the membrane a minimum of 1 1/2 inch wide.

3. All field-welded seams must be inspected with a tack claw and all deficiencies repaired prior to inspection by Duro-Last.

4. Note: Be cautious when welding printed material. It is easy to “disfigure” the print at the end of a welded seam with the roller and welder. The top surface of the membrane will take longer to get to melting temperature, so welding time may vary.

FLASHINGS

1. Vertical surfaces need to be ordered in the “base” color of Sandstone Tan or Slate Gray. It is not recommended to use shingle print membrane on parapet walls or other vertical flashing.

2. The Duro-Last membrane must not come into contact with surfaces hotter then 120°F such as insulated chimney pipes, exhaust pipes, or combustible fuel pipes.

3. All flashings must be terminated at a minimum of 8 inches above the roof surface. 4. For aesthetic reasons, shingle-printed flashings or gray flashings must be ordered for all penetrations on

the roof. If you are ordering material to flash a wall, order gray or tan materials. 5. Shingle-printed accessories must be installed so that the shingle lines of the skirts are installed to match

the pattern on the roof.




TWO-WAY AIR VENTS

1. Two-Way Air Vents must be installed at a rate of one vent for every 1,000 square feet of deck area. 2. Two-Way Air Vents must not be installed near drains or in valleys 3. Two-Way Air Vents cannot be used to vent attic spaces or used to cover ventilation pipes. 4. Two-Way Air Vents must be evenly spaced across the roof area and centered between fastener rows. 5. See Details 5020 for installation references.

ROOF DRAINS

1. All existing roofing materials must be removed from drain bowl and clamping ring. After the Duro-Last membrane is properly installed onto the bowl and the clamping ring is set in place, all bolts securing the ring must be installed to provide constant, even compression on the sealant (½ tube min). If bolts are broken or missing, replacements must be installed.

2. If the Duro-Last drain boot is to be used, apply ½ tube of sealant (min) to the outside of the drain boot and insert it into the drain. Install composite compression drain rings as low into the drain as possible.

3. See Details 2011, 2020, 2021, 2025, 2030, 2041 & 2050 for installation references. EXPANSION JOINTS

1. See Details 1140, 1150, 1160, 1170 & 6160 for installation references. PITCH PAN

1. Use pitch pans only when standard Duro-Last flashings cannot be used. 2. Only CSL self-leveling pitch pan sealers or Duro-Caulk Plus may be used when creating a pitch pan. 3. See Details 4030, 4040 and 4045 for installation references.

SEALANTS

1. Duro-Caulk® must be used on all Details that require sealant. The use of any other sealants must be pre-approved by the Duro-Last Engineering Services Department.

WALKWAY PAD

1. Duro-Last Roof Trak III Walkway Pad is recommended at all roof access points, service units and high traffic areas. If a building owner chooses not to purchase the Roof Trak III Walkway Pad, he increases the risk of potential third party damage to the Duro-Last roofing system. Note: Weld only one side of the walkway pad if it will be covering any field seams. This will allow the Duro-Last Technical Representative to inspect the entire field seam.




CAUTIONS AND WARNINGS

1. Duro-Last will not be responsible for damage that may occur as a result of moisture created from condensation occurring within a roof deck subassembly or building.

2. All Polystyrene insulation (Styrofoam, Formular, Dow, EPS, etc. - blue, white, gray, green, or pink) must have an approved non-styrene facer or a 3 mil polyethylene slip sheet covering when installed in direct contact with existing or new PVC membranes. Polyethylene or polypropylene faced EPS insulations are acceptable only after testing and approval by Duro-Last for compatibility.

3. Phenolic foam is not an approved insulation in new construction or re-roofing applications. The Duro-Last Roofing System may not, under any circumstance, be installed over phenolic foam.

4. Perlite and wood/mineral fiber-boards are not acceptable substrates for the Duro-Last membrane. 5. Wood fiberboards are only acceptable when a metal roof is being retrofitted. 6. If asbestos is encountered, the building owner must be notified at once. The owner is responsible for

determining the proper course of action. 7. A Duro-Last roof should not be installed over areas of roofs if one or more of the following conditions

exist: a. The building structure is not adequate to handle the load of the completed system. b. It is not possible to find an approved fastener that will properly hold in the substrate. c. Roofs are subject to hot embers, slag or burning debris. d. Incompatible chemicals are exhausted directly onto the roof or may come in contact with the roof in

liquid form. (See Chemical Resistance in the General Section) e. Steam in excess of 120º F is exhausted directly onto the roof.

8. Take extra caution when walking across the printed material. The membrane can be scratched easily if the appropriate measures are not taken.

9. Take note where intersecting roof lines that have different roof pitches, such as a 2:12 roof pitch forming a valley with a 4:12 roof pitch, it will be difficult to align the pattern rows together.

10. Be aware that it may become difficult to align the membrane from “side-to-side” toward the end of the run on roll lengths longer than 30’-0”. This is due to membrane stretching, printing irregularities, etc., that could result in a misalignment of the pattern. To prevent a misalignment of the pattern, keep the overall length around 30’-0”.

11. If vinyl edgings are used, they are not to be painted. If a specific color is desired, then metal edging or metal covers shall be used.

Documents

DURO-LAST SHINGLE PRINTED MEMBRANE SPECIFICATION