ITB2026-106 YMCA Roof Replacement

PROJECT MANUAL
CONTRACT
REQUIREMENTS
CONSTRUCTION DOCUMENTS
AND SPECIFICATIONS
ISSUED FOR BID
April 2026
OWNER:
City of Tybee Island
FOR:
Tybee Island YMCA ROOF REPLACEMENT

SECTION 07 54 23
TPO THERMOPLASTIC SINGE-PLY ROOFING
PART 1 GENERAL
1.1 SECTION INCLUDES
A. TPO Thermoplastic Single-Ply Roofing.
B. Membrane Flashings.
C. Metal Flashings.
D. Roof Insulation.
1.2 RELATED SECTIONS
A. Section 05 31 23 - Steel Roof Decking.
B. Section 06 10 00 - Rough Carpentry.
C. Section 07 54 00 - Thermoplastic Membrane Roofing.
D. Section 07 62 00 - Sheet Metal Flashing and Trim.
E. Section 07 70 00 - Roof and Wall Specialties and Accessories.
F. Section 08 60 00 - Roof Windows and Skylights.
G. Section 22 30 00 - Plumbing Equipment.
1.3 REFERENCES
A. American Society of Civil Engineers (ASCE) - ASCE 7 - Minimum Design Loads
for Buildings and Other Structures, Current Revision.
B. ANSI/SPRI WD-1 "Wind Design Standard for Roofing Assemblies".
C. ASTM International (ASTM):
1. ASTM C 1289 - Standard Specification for Faced Rigid Cellular
Polyisocyanurate Thermal Insulation Board.
2. ASTM D 6878 - Standard Specification for Thermoplastic Polyolefin Based
Sheet Roofing.
3. ASTM E 96 - Standard Test Methods for Water Vapor Transmission of Materials.
D. Factory Mutual (FM Global):
1. Approval Guide.
a. Factory Mutual Standard 4470 - Approval Standard for Class 1 Roof Covers.
b. Loss Prevention Data Sheets 1-28, 1-29.
E. International Code Council (ICC):
1. International Building Code (IBC).
F. National Roofing Contractors Association (NRCA) - Low Slope Roofing and
Waterproofing Manual, Current Edition
G. Sheet Metal and Air Conditioning Contractors National Association, Inc.

(SMACNA) - Architectural Sheet Metal Manual.
H. Underwriters Laboratories (UL):
1. TGFU R1306 - "Roofing Systems and Materials Guide".
2. UL-790 - Standard Test Method for Fire Tests of Roof Coverings.
I. ANSI/ASHRAE/IESNA Standard 9.1 (2007): Energy Standard for Buildings Except Low-
Rise Residential Buildings.
1.4 DESIGN CRITERIA
A. Wind Uplift Performance:
1. Roofing System Design: Provide a roofing system that is identical to systems that
have been successfully tested by a qualified testing and inspecting agency to resist
uplift pressure calculated according to ASCE 7.
a. Field Uplift Pressure: Must meet local building code and approved
by manufacturer.
b. Perimeter Uplift Pressure: Must meet local building code and approved by
manufacturer.
c. Corner Uplift Pressure: Must meet local building code and approved by
manufacturer.
B. Fire Resistance Performance:
1. Roof system will achieve a UL Class A rating when tested in accordance with UL-790.
C. Thermal Performance: Roof system will achieve a minimum R value not less than 20.0.
D. Drainage: Provide a roof system with positive drainage where all standing water dissipates
within 48 hours after precipitation ends.
E. Building Codes:
1. Roof system will meet the requirements of all federal, state and local code bodies
having jurisdiction.
1.5 SUBMITTALS
A. Submit under provisions of Section 01 30 00.
B. Product Data: Manufacturer's data sheets on each product to be used, including:
1. Preparation instructions and recommendations.
2. Storage and handling requirements and recommendations.
3. Installation methods.
C. Detail Drawings:
1. Submit approved plan, section, elevation or isometric drawings which detail the
appropriate methods for all flashing conditions found on the project.
2. Coordinate approved drawings with locations found on the Contract Drawings.
D. Selection Samples: For each finish product specified, two complete sets of chips
representing manufacturer's full range of available colors, membranes, and thicknesses.
E. Verification Samples: For each finish product specified, two samples, minimum size
4 inches (100 mm) square representing actual product, color, and patterns.

1.6 QUALITY ASSURANCE
A. Manufacturer Qualifications: All primary products specified in this section will be supplied
by a single manufacturer with a minimum of twenty (20) years' experience.
B. Installer Qualifications:
1. All products listed in this section are to be installed by a single installer with a
minimum of five (5) years' experience demonstrated in installing products of the
same type and scope as specified.
2. Installer must be capable of extending the Manufacturer's Labor and Materials
guarantee.
3. Installer must be capable of extending the Manufacturer's No Dollar
Limit guarantee.
C. Mock-Up: Provide a mock-up for evaluation of surface preparation, installation
techniques and workmanship.
1. Finish areas designated by Owner.
2. Do not proceed with remaining work until workmanship, color, and sheen
are approved by Owner.
3. Refinish mock-up area as required to produce acceptable work.
1.7 DELIVERY, STORAGE, AND HANDLING
A. Store products in manufacturer's unopened packaging until ready for installation.
B. Store and dispose of hazardous materials, and materials contaminated by hazardous
materials, in accordance with requirements of local authorities having jurisdiction.
C. Material Safety Data Sheets (MSDS) must be on location at all times during the
transportation, storage and application of materials.
D. When loading materials onto the roof, the Carlisle Authorized Roofing Applicator must
comply with the requirements of the building owner to prevent overloading and
possible disturbance to the building structure.
1.8 PROJECT CONDITIONS
A. Proceed with roofing work only when weather conditions are in compliance with the
manufacturer's recommended limitations, and when conditions will permit the work
to proceed in accordance with the manufacturer's requirements and
recommendations.
B. Proceed with work so new roofing materials are not subject to construction traffic. When
necessary, new roof sections shall be protected and inspected upon completion for possible
damage.
C. Provide protection, such as 3/4-inch-thick plywood, for all roof areas exposed to traffic
during construction. Plywood must be smooth and free of fasteners and splinters.
D. The surface on which the insulation or roofing membrane is to be applied shall be clean,
smooth, dry, and free of projections or contaminants that would prevent proper application of
or be incompatible with the new installation, such as fins, sharp edges, foreign materials, oil
and grease.
E. New roofing shall be complete and weather tight at the end of the workday.

F. Contaminants such as grease, fats and oils shall not be allowed to come in direct contact
with the roofing membrane.
1.9 WARRANTY
a. Special Warranty: Manufacturer's standard or customized form, without monetary limitation,
(No Dollar Limit) in which manufacturer agrees to repair or replace components of membrane
roofing system that fail in materials or workmanship within specified warranty period.
1) Special warranty includes membrane roofing, base flashings, fasteners, edge metal
roofing accessories, and other components of membrane roofing system. Full edge to edge
2) Warranty Period: (20) Twenty years from date of Substantial Completion.
b. Special Project Warranty: Submit roofing Installer's warranty, on warranty form at end of this
Section, signed by Installer, covering the Work of this Section, including all components of
membrane roofing system such as membrane roofing, base flashing, roof insulation, fasteners,
edge metal, and walkway products, for the following warranty period:
1) Warranty Period: (5) Five years from date of Substantial Completion.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Basis of design: Carlisle SynTec Systems, which is located at: P. O. Box 7000; Carlisle, PA
17013; Toll Free Tel: 800-4-SYNTEC; Tel: 717-245-7000; Fax: 717-245-7053;
Web:www.carlisle-syntec.com
B. Acceptable Manufacturers:
Basis of Design: Carlisle-SynTec Systems
1. Duro-last Roofing, Inc.
2. Siplast, Inc.
2.2 SCOPE / APPLICATION
A. Roof System: Provide a waterproof roof system, capable of withstanding uplift forces as
specified in the Design Criteria article of this section.
1. Membrane Attachment: Mechanically Attached a smooth back membrane into
structural purlins to meet wind uplift pressures.
2. At visible pop-up roof area:
a. Membrane Attachment: Adhere a Fleeceback membrane over coverboard.
b. Hot air weld contour rib system to the single ply membrane to emulate the
appearance of a standing seam metal roof system.
B. Base Flashing: Provide a waterproof, fully adhered base flashing system at all penetrations,
plane transitions and terminations.
C. Insulation:
1. Provide an EPS roof insulation to fill the flutes of existing metal panels.
2. Mechanically attach one layer of 1" Polyisocyanurate insulation over the EPS using a
common fastener.

3. At visible pop-up roof area:
a. Provide an EPS roof insulation to fill the flutes of existing metal panels.
b. Mechanically attach one layer of 12" Densdeck Prime coverboard using a common
fastener.
2.3 INSULATION
A. Polyisocyanurate InsulBase: Rigid board with fiber reinforced facers on both sides, meeting
or exceeding the requirements of ASTM C 1289. Carlisle InsulBase.
1. Compressive Strength: 20 psi (138 kPa).
2. Density: 2 lb per cubic foot (24 kg/cu m) minimum.
2.4 THERMOPLASTIC POLYOLEFIN (TPO) MEMBRANE
A. Sure-Weld Membrane:
1. Color: Gray
2. Membrane Thickness: 60 mil nominal.
a. Thickness over Scrim: 0.020 inches (0.508mm).
b. Breaking Strength (ASTM D 751): 250 lbf/in (1.1 kN/m) minimum.
c. Tear Resistance (ASTM D 751): 55 lbf/in (245 N/m) minimum.
d. Elongation (ASTM D 751): 25 percent.
3. Field Sheet Dimensions:
a. Width: 10 feet (3.05 m) maximum.
b. Length: 100 feet (30.5 m) maximum.
B. Sure-Weld Contour Rib profile
1. A TPO extrusion designed for use with Fleeceback TPO adhered roofing systems.
Extrusion used to emulate the appearance of a standing seam metal roof system at
visible roof areas. Each rib profile measures 1 14" tall and 1 34" wide, including
the welding flanges, while the vertical profile is 3/8" thick. Ribs must be heat-
welded to membrane. Adhesives or peel & stick ribs will not be allowed. Spacing
of ribs to be 16" O.C.
2.5 FLASHING ACCESSORlES
A. Inside Corners: Pre-molded corner flashing for inside corners. 60 mil thickness. Color to
match membrane. Special colors require custom fabrication process.
B. Outside Corners: Injection molded corner used for flashing outside corners. 60 mil
thickness. Color to match membrane. Special colors require custom fabrication process.
C. TPO T-Joint Covers: Injection molded 60 mil thick TPO formed into a 4.5-inch
(114mm) diameter circle used to seal step-offs at splice intersections. Color to match
membrane. Special colors require custom fabrication process.
D. Molded Pipe Seals: A pre-molded flashing and clamping ring used for pipe penetrations.
Available for 0.75 inch to 8 inch (19 - 203.2mm) diameter pipes. Color to match
membrane. Special colors not available.
E. Split Pipe Seals: Pre-fabricated flashing consisting of 45 mil thick reinforced Sure-Weld
Membrane for pipes 1 inch to 6 inch (25.4 - 152.4mm) in diameter. A split (cut) and
overlapped tab is incorporated to allow the pipe seal to be opened and wrapped around the
pipe when it is not possible to pull a standard pipe flashing over a round penetration. Gray,
tan and special colors require custom order fabrication. Custom sizes available on a special

order basis.
F. TPO Square Tubing Wraps: Pre-fabricated flashings made of 45 mil thick reinforced Sure-
Weld membrane for square tubing. A split (cut) and overlap tab are incorporated into these
parts to allow the seals to be opened and wrapped around a square tubing penetration with
an obstruction. Stock sizes include 3- inch, 4-inch, 5-inch and 6 inch (76, 102, 127, 152
mm) diameter square tubing. Gray, tan and special colors require custom order fabrication.
Custom sizes available on a special order basis.
G. TPO Molded Sealant Pockets:
1. A two-piece, interlocking injection molded, flexible pocket with a rigid
polypropylene vertical wall and pre-formed deck flanges. Color to match
membrane. Special colors not available.
2. Used with Thermoplastic One-Part Pourable Sealer as specified in this section for
waterproofing pipe clusters or other odd shaped penetrations. The removable built-in
extension legs allow the oval pocket to adjust from 7.5 inches to 12 inches (191mm -
305mm) in length while maintaining a 6-inch width (152mm).
H. Pressure-Sensitive Cover Strip: A nominal 6 inch (152mm) wide by 40 mil thick non-
reinforced TPO membrane laminated to nominal 35-mil thick cured synthetic rubber
pressure-sensitive adhesive. Used in conjunction with TPO Primer to strip in flat metal
flanges (i.e., drip edges or rows of fasteners and plates). Color to match membrane. Special
colors not available.
I. Sure-Weld Heat Weldable Walkway Rolls: Superior tear, puncture and weather resistance
and designed to protect Sure-Weld membrane in those areas exposed to repetitive foot
traffic or other hazards. Walkway material may be heat welded to Sure-Weld membrane
using an automated heat welder or hand held heat welder. Walkway Rolls are 34 inches
(864mm) wide by 50 feet (15.2 m) long and are nominal 180 mils thick. Color - White,
gray and tan.
J. Non-Reinforced Flashing: Non-reinforced TPO flashing is a 60-mil thick non-reinforced
TPO based membrane used for detail work where the use of pre-molded or pre-fabricated
accessories are not feasible. Color - White, gray and tan. Special colors require lead time
and 5,000 square foot minimum.
K. Sure-weld Contour rib profile: The contour rib profile is designed for use with Fleeceback
TPO adhered roofing systems. Ensure that all welding surfaces are clean and dry. The
Contour rib profile measures 1 14" tall and 1 34" wide, including the welding flanges, while
the vertical profile is 3/8" thick.
2.6 CLEANERS, PRIMERS, ADHESIVES AND SEALANTS
A. Sure-Weld Bonding Adhesive: A high-strength solvent-based contact adhesive used for
bonding Sure-Weld membrane to various porous and non-porous substrates.
1. Base: Synthetic Rubber.
2. Color: Yellow.
3. Solids: 20.0 percent.
4. VOC: 670 grams/liter.
B. Cut Edge Sealant: A medium solids content, free flowing polymeric material designed
for sealing cut edges (exposed fabric) of Sure-Weld reinforced membrane.
C. Water Cut-Off Mastic: A one-component, low viscosity, self wetting, Butyl blend mastic
used as a compression sealing agent between membrane and applicable substrates.

D. TPO Primer: Solvent-based product designed to prepare TPO membrane for improved
adhesion to TPO surfaces prior to the application of pressure-sensitive products and sealant
pockets.
E. Universal Single-Ply Sealant: A 100 percent solids, solvent free, VOC free, one-part polyether
sealant that provides a weather tight seal to a variety of building materials. It is used for general
caulking such as above termination bars and metal counter flashings and at scupper details..
Available in white only.
F. Thermoplastic One-Part Sealant: Single component, moisture curing, elastomeric polyether
sealant that is compatible with Carlisle's Thermoplastic membranes. Provides a flexible,
durable and long lasting seal around hard-to-flash penetrations in Thermoplastic Roofing
Systems.
G. Carlisle Weathered Membrane Cleaner: Clear, solvent-based cleaner used to loosen and
remove contaminants from the surface of exposed membrane.
2.7 FASTENING COMPONENTS
A. Retro Driller Fasteners: Heavy-duty retro driller threaded fastener with a Phillips head
for standard TPO seam fastening (Mechanically Fastened Roofing Systems into
structural purlins) and where increased pullout resistance is necessary. (Fully Adhered
Roofing Systems).
B. InsulFast Fasteners: Threaded, #12 fastener with a #3 Phillips head used with 3 inch
(76mm) diameter Insulation Plates. For insulation attachment into steel or wood decks.
C. Piranha Plates: A 2 3/8 inch (60mm) diameter metal barbed fastening plate used with
Carlisle HP-X, CD-10 or HD 14-10 Fasteners for membrane securement. This plate can be
used for insulation securement.
D. Insulation Fastening Plates: A nominal 3 inch (76mm) diameter metal plate used for
insulation attachment in conjunction with the appropriate Carlisle Fastener.
PART 3 EXECUTION
3.1 EXAMINATION
A. Do not begin installation until substrates have been properly prepared.
B. If substrate preparation is the responsibility of another installer, notify Architect
of unsatisfactory preparation before proceeding.
3.2 PREPARATION
A. Clean surfaces thoroughly prior to installation.
B. Prepare surfaces using the methods recommended by the manufacturer for achieving the
best result for the substrate under the project conditions.
C. Do not commence work until all other work trades have completed jobs that require them to
traverse the deck on foot or with equipment.
D. A vapor retarder / temporary roof (Carlisle 725 TR Air & Vapor Barrier/Temporary Roof)
may be applied to protect the inside of the structure prior to the roof system installation.

3.3 INSULATION - SYSTEM DESIGN
A. Base Layer:
1. Type: InsulFoam EPS Flute Fill
2. Thickness: 2 inches.
3. Attachment Method: Mechanically Fastened.
B. Top layer:
1. Type: InsulBase Polyisocyanurate.
2. Thickness: 1".
3. Attachment Method: Mechanically Fastened.
3.4 INSULATION PLACEMENT
A. Install insulation or membrane underlayment in multiple layers over the substrate with
boards butted tightly together with no joints or gaps greater than 1/4 inch (6 mm). Stagger
joints both horizontally and vertically if multiple layers are provided.
B. Secure insulation to the substrate with the required mechanical fasteners or insulation
adhesive in accordance with the manufacturer's current application guidelines.
C. Do not install wet, damaged or warped insulation boards.
D. Stagger joints in one direction unless joints are to be taped. Install insulation boards snug.
Gaps between board joints shall not exceed 1/4 inch (6 mm). Fill all gaps in excess of 1/4
inch (6 mm) with same insulation material.
E. Wood nailers must be at least 3 1/2 inches (89 mm) wide or 1 inch (25 mm) wider than
adjacent metal flange. Thickness must equal that of insulation but not less than 1 inch (25
mm) thickness.
F. Miter and fill the edges of the insulation boards at ridges, valleys and other changes in plane
to prevent open joints or irregular surfaces. Avoid breaking or crushing of the insulation at
the corners.
G. Do not install any more insulation than will be completely waterproofed each day.
3.5 INSULATION ATTACHMENT
A. Securely attach insulation to the roof deck for Mechanically Fastened Roofing Systems.
B. Install insulation layers, maximum 4 feet by 8 feet Stagger the joints of additional layers by
a minimum of 6 inches (152 mm).
3.6 MEMBRANE PLACEMENT AND ATTACHMENT (Mechanically Attached into structural purlins)
A. Unroll and position membrane without stretching. Allow the membrane to relax for
approximately 1/2 hour prior to attachment. Provide and secure both perimeter and field
membrane sheets in accordance with the manufacturer's most current specifications and
details.
B. Attachment must have been successfully tested to meet or exceed the calculated uplift
pressure required by the International Building Code (ASCE-7) or ANSI/SPRI WD-1.
C. Enhance the perimeter and corner areas in accordance with the International Building Code
(ASCE-7) or ANSI/SPRI WD-1

D. Secure the membrane with the required Carlisle Fasteners and Plates centered over the pre-
printed marks approximately 1-1/2 inches from the edge of the membrane sheet.
E. Install adjoining membrane sheets in the same manner in accordance with the
manufacturer's current application requirements.
3.7 SEAM WELDING
A. Hot-air weld membrane using an Automatic Hot Air Welding Machine or Hot Air Hand
Welder in accordance with the manufacturer's current guidelines. At all splice intersections,
roll the seam with a silicone roller to ensure a continuous hot air welded seam.
B. Overlay all splice intersections with Sure-Weld T-Joint Cover.
C. Probe all seams once the hot air welds have thoroughly cooled (approximately 30 minutes).
D. Repair all seam deficiencies the same day they are discovered.
E. Apply Cut Edge Sealant on all cut edges of reinforced membrane (where the scrim
reinforcement is exposed) after seam probing is complete. Cut Edge Sealant is not required
on vertical splices.
3.8 FLASHING
A. Flashing of parapets, curbs, expansion joints and other parts of the roof must be performed
using Sure-Weld reinforced membrane or prefabricated accessories. Sure-Weld non-
reinforced membrane may be used for flashing pipe penetrations, Sealant Pockets, and
scuppers, as well as inside and outside corners, when the use of pre-molded or
prefabricated accessories is not feasible.
B. Follow manufacturer's typical flashing procedures for all wall, curb, and penetration
flashing including metal edging/coping and roof drain applications.
3.9 WALKWAYS
A. Install walkways at all traffic concentration points (such as roof hatches, access doors,
rooftop ladders, etc.) and all locations as identified on the Contract Drawings.
B. Hot-air weld walkway pads to the membrane in accordance with the manufacturer's current
application guidelines.
3.10 DAILY SEALS
A. On phased roofing, when the completion of flashings and terminations is not achieved by the
end of the work day, a daily seal must be performed to temporarily close the membrane to
prevent water infiltration.
B. Complete an acceptable membrane seal in accordance with the manufacturer's
requirements.
3.11 CLEAN UP
A. Perform daily clean-up to collect all wrappings, empty containers, paper, and other debris
from the project site. Upon completion, all debris must be disposed of in a legally acceptable
manner.
B. Prior to the manufacturer's inspection for warranty, the applicator must perform a pre-