**Fort Smith National Historic Site\
Frisco Depot\
\
Fort Smith, Arkansas**

**[ROOFING SPECIFICATION]{.underline}**

**[PART 1 GENERAL]{.underline}**

**[1.01 GENERAL REQUIREMENTS]{.underline}**

**A. Deviations:** In the event this Specification deviates from the
manufacturer\'s current specification, this specification prevails,
except where they conflict with the manufacturer\'s requirements for the
specified guarantee. In this case, the manufacturer\'s specification
prevails.

**B. Specification Amendments:** Drawings, addenda and modifications may
be issued subsequent to the printing of this Specification.

**C. Contractor Acceptance:** Prior to the project start, ascertain that
all aspects of this Specification and possible modifications are
workable and do not conflict with the manufacturer\'s requirements for
the specified guarantee. Upon commencement of the work, it will be
presumed that this Specification and drawings, addenda and modifications
are satisfactory to both the Contractor and the manufacturer in their
entirety.

**D. Supplied Materials:** Supply all materials of the roofing system,
including accessory products. The bidding Contractor, by making his bid,
represents that his bid price is based on the use of the materials
listed in Part 2 Products. Refer to Part 1.03 Description of Work for
specific use within each roofing assembly outlined.

**[1.02 REFERENCE STANDARDS]{.underline}**

References in these specifications to standards, test methods, and
codes, are implied to mean the latest edition of each such standard
adopted. The following is an abbreviated list of associations,
institutions, and societies which may be used as references throughout
these specifications.

**[ASTM]{.underline}** American Society for Testing and Materials

Philadelphia, PA

**[FM]{.underline}** Factory Mutual Engineering and Research

Norwood, MA

**[NRCA]{.underline}** National Roofing Contractors Association

Rosemont, IL

**[OSHA]{.underline}** Occupational Safety and Health Administrations

Washington, DC

**[SMACNA]{.underline}** Sheet Metal and Air Conditioning Contractors
National Association

Chantilly, VA

**[UL]{.underline}** Underwriters Laboratories

Northbrook, IL

**[1.03 DESCRIPTION OF WORK]{.underline}**

The basic work descriptions (components, layering and attachment
methods) required in this specification are referenced below.

> **Project Type:** Tear-off **Specification #:** 2030 IH-T

> **Deck:** Wood **Slope:** 1/2 inch

> **Crickets:** Tapered Paratherm crickets, providing for a roof slope
> of 1/2 inch per foot, mechanically attached simultaneously with the
> top layer of insulation.
>
> **Insulation:** DensDeck DuraGuard, by Georgia Pacific Corporation,
> having a thickness of 1/2 inch, mechanically attached, or approved
> equal
>
> **Roof system:** Paradiene 20, applied in PA-100 Asphalt; or approved
> equal
>
> Paradiene 30 FR TG, torch applied or approved equal.
>
> **Flashing system:** Veral Aluminum, torch applied or approved equal.

1.04 QUALITY ASSURANCE

**A. Acceptable Products:** Primary roofing products, including each
type of sheet, all manufactured in the United States, shall be supplied
by a single manufacturer which has been successfully producing the
specified types of primary products for not less than 10 years. The
primary roofing products shall have maintained a consistent composition
for a minimum of five years.

**B. Product Quality Assurance Program:** Primary roofing materials
shall be manufactured under a quality management system that is
monitored regularly by a third party auditor under the ISO 9001:2000
audit process. A certificate of analysis for reporting/confirming the
tested values of the actual material being supplied for the project will
be required prior to project close-out.

**C. Agency Approvals:** The proposed roof system shall conform to the
following requirements. No other testing agency approvals will be
accepted.

1\. Underwriters Laboratories Class A acceptance of the proposed roofing
system (including mopping asphalt or cold adhesive) without additional
requirements for gravel or coatings.

**D. Acceptable Contractor:** Contractor shall have a minimum of 2 years
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.

**E. Scope of Work:** The work to be performed under this specification
shall include but is not limited to the following: Attend necessary job
meetings and furnish competent and full time supervision, experienced
roof mechanics, all materials, tools, and equipment necessary to
complete, in an acceptable manner, the roof installation in accordance
with this specification. Comply with the latest written application
instructions of the manufacturer of the primary roofing products. In
addition, application practice shall comply with requirements and
recommendations contained in the latest edition of the [Handbook of
Accepted Roofing Knowledge]{.underline} (HARK) as published by the
National Roofing Contractor\'s Association, amended to include the
acceptance of a phased roof system installation.

**F. Local Regulations:** Conform to regulations of public agencies,
including any specific requirements of the city and/or state of
jurisdiction.

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

**[1.05 GUARANTEE/WARRANTY]{.underline}**

**A. Roof Membrane Guarantee:** Upon successful completion of the
project, and after all post installation procedures have been completed,
furnish the Owner with the manufacturer\'s ten year labor and materials
membrane guarantee. The guarantee shall be a term type, without
deductibles or limitations on coverage amount, and shall be issued at no
additional cost to the Owner. This guarantee shall not exclude random
areas of ponding from coverage.

\> Siplast ten year Roof Membrane Guarantee or approved equal to match
Guarantee

1.06 SUBMITTALS

All submittals which do not conform to the following requirements will
be rejected.

**A. Submittal of Equals:** 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:

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

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

3\. Evidence that the manufacturer of the proposed roofing system
utilizes a quality management system that is ISO 9001:2000 certified.
Documentation of ISO 9001:2000 certification of foreign subsidiaries
without domestic certification will not be accepted.

> 4\. 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.

5\. Descriptive list of the materials proposed for use.

6\. Evidence of Underwriters\' Laboratories Class A acceptance of the
proposed roofing system (including mopping asphalt or cold adhesive)
without additional requirements for gravel or coatings. No other testing
agency approvals will be accepted.

7\. Letter from the proposed primary roofing manufacturer confirming
that a phased roof application, with only the modified bitumen base ply
in place for a period of up to 10 weeks, is acceptable and approved for
this project.

8\. List of 3 of the proposed primary roofing manufacturer\'s projects,
located in the United States, of equal size and degree of difficulty
which have been performing successfully for a period of at least 10
years.

9\. Letter from the proposed primary roofing manufacturer confirming
that the filler content in the elastomeric blend of the proposed roof
membrane and flashing components does not exceed 35% in weight.

10\. Complete list of material physical and mechanical properties for
each sheet including: weights and thicknesses; low temperature
flexibility; peak load; ultimate elongation; dimensional stability;
compound stability; Compound stability; granule embedment and resistance
to thermal shock for foil faced products.

11\. Sample copy of the proposed guarantee.

12\. Completed Product Substitution Request Form included with this
specification section.

**B. Submittals with Bid:**

1\. Submit a price per board foot to furnish/install Paraslope over the
Paradiene 20 or approved equal,surface to facilitate drainage.

**C. Submittals Prior to Contract Award:**

1\. Letter from the proposed primary roofing manufacturer confirming
that the bidder is an acceptable Contractor authorized to install the
proposed system.

2\. Letter from the primary roofing manufacturer stating that the
proposed application will comply with the manufacturer\'s requirements
in order to qualify the project for the specified guarantee.

**D. Submittals Prior to Project Close-out:**

1\. Manufacturer\'s printed recommendations for proper maintenance of
the specified roof system including inspection frequencies, penetration
addition policies, temporary repairs, and leak call procedures.

1.07 PRODUCT DELIVERY STORAGE AND HANDLING

**A. Delivery:** Deliver materials in the manufacturer\'s original
sealed and labeled containers and in quantities required to allow
continuity of application.

**B. Storage:** Store materials out of direct exposure to the elements.
Store roll goods on a clean, flat and dry surface. All material stored
on the roof overnight shall be stored on pallets. Rolls of roofing must
be stored on ends. Store materials on the roof in a manner so as to
preclude overloading of deck and building structure. Store materials
such as solvents, adhesives and asphalt cutback products away from open
flames, sparks or excessive heat. Cover all material using a breathable
cover such as a canvas. Polyethylene or other non-breathable plastic
coverings are not acceptable.

**C. Handling:** Handle all materials in such a manner as to preclude
damage and contamination with moisture or foreign matter. Handle rolled
goods to prevent damage to edges or ends.

**D. Damaged Material:** Any materials that are found to be damaged or
stored in any manner other than stated above will be automatically
rejected, removed and replaced at the Contractor\'s expense.

1.08 PROJECT/SITE CONDITIONS

**A. Requirements Prior to Job Start**

**1. Notification:** Give a minimum of 5 days notice to the Owner and
manufacturer prior to commencing any work and notify both parties on a
daily basis of any change in work schedule.

**2. Permits:** Obtain all permits required by local agencies and pay
all fees which may be required for the performance of the work.

**3. Safety:** Familiarize every member of the application crew with all
fire and safety regulations recommended by OSHA, NRCA and other industry
or local governmental groups.

**B. Environmental Requirements**

**1. Precipitation:** Do not apply roofing materials during
precipitation or in the event there is a probability of precipitation
during application. Take adequate precautions to ensure that materials,
applied roofing, and building interiors are protected from possible
moisture damage or contamination.

**2. Temperature Restrictions - asphalt:** At ambient temperatures of
40°F (4°C) and below, special precautions must be taken to ensure that
the specified Type IV asphalt maintains a minimum acceptable 400°F
(204°C) at the point of sheet application. The asphalt must not be
overheated to compensate for cold conditions. The use of insulated
handling equipment is strongly recommended. Hot luggers, mop carts, and
kettle-to-roof supply lines should be insulated. Hand mops should be
constructed with a smaller yarn head to facilitate short moppings.
Luggers and mop carts should never be more than half filled at all
times.

**C. Protection Requirements**

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

**2. Torch Safety:** Crew members handling torches shall be trained by
an Authorized Certified Roofing Torch Applicator (CERTA) Trainer, be
certified according to CERTA torch safety guidelines as published by the
National Roofing Contractor\'s Association (NRCA), and follow torch
safety practices as required by the contractor\'s insurance carrier.
Designate one person on each crew to perform a daily fire watch. The
designated crew member shall watch for fires or smoldering materials on
all areas during roof construction activity, and for the minimum period
required by CERTA guidelines after roofing material application has been
suspended for the day.

**3. Limited Access:** Prevent access by the public to materials, tools
and equipment during the course of the project.

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

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

**[PART 2 PRODUCTS]{.underline}**

2.01 ROOFING SYSTEM ASSEMBLY/PRODUCTS

**A. Rigid Roof Insulation:** Roof insulation shall be UL and FM
approved. Insulation shall be approved in writing by the insulation
manufacturer for intended use and for use with the specified roof
assembly. Maintain a maximum panel size of 4 feet by 4 feet where
insulation is specified to be installed in hot asphalt or insulation
adhesive.

**1. Polyisocyanurate Tapered Crickets:** Tapered panels and standard
fill panels composed of a closed cell, rigid polyisocyanurate foam core
material, integrally laminated between glass fiber facers, in full
compliance with ASTM C 1289, Type II, Class 1, Grade 2. The tapered
system shall provide for a roof slope of 1/2 inch per foot. Acceptable
types are as follows.

\> Tapered Paratherm by Siplast; Irving, TX or approved equal

**2. Perlite Tapered Edge Panels:** 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.

**3. Gypsum Sheathing Panel:** A panel composed of a gypsum based,
non-structural water resistant core material integrally bonded with
fiberglass mats on both sides having a nominal thickness of 1/2 inch.
The panel surface shall be factory coated with a low permeability,
heat-cured coating. Acceptable types are as follows:

\> DensDeck DuraGuard Gypsum Roof Board, by Georgia Pacific Corporation;
Atlanta, GA or approved equal

**4. Gypsum Sheathing Panel for Wood/Plywood Substrates to Receive
Flashing Coverage:** A panel composed of a gypsum based, non-structural
water resistant core material integrally bonded with fiberglass mats on
both sides having a nominal thickness of 1/4 inch. The panel surface
shall be factory primed with a non-asphaltic primer. Acceptable types
are as follows:

\> DensDeck Prime Gypsum Roof Board, by Georgia Pacific Corporation;
Atlanta, GA or approved equal

2.02 DESCRIPTION OF SYSTEMS

**A. Roofing Membrane Assembly:** A roof membrane assembly consisting of
two plies of a prefabricated, reinforced, homogeneous
Styrene-Butadiene-Styrene (SBS) block copolymer modified asphalt
membrane, applied over a prepared substrate. Both reinforcement mats
shall be impregnated/saturated and coated each side with an SBS modified
bitumen blend. The modified bitumen finish ply shall be coated one side
with a torch grade SBS bitumen blend adhesive layer. The cross sectional
area of the sheet material shall contain no oxidized or non-SBS modified
bitumen. The adhesive layer shall be manufactured using a process that
embosses the surface with a grooved pattern to provide optimum burn‑off
of the plastic film and to maximize application rates. The roof system
shall pass 500 cycles of ASTM D 5849 Resistance to Cyclic Joint
Displacement (fatigue) at 14°F (-10°C). Passing results shall show no
signs of membrane cracking or interply delamination after 500 cycles.
The roof system shall pass 200 cycles of ASTM D 5849 after heat
conditioning performed in accordance with ASTM D 5147. The assembly
shall possess waterproofing capability, such that a phased roof
application, with only the modified bitumen base ply in place, can be
achieved for prolonged periods of time without detriment to the
watertight integrity of the entire roof system.

\> Siplast Paradiene 20/30 FR TG roof system or approved equal

**1. Modified Bitumen Base, Stripping Ply, and Flashing Reinforcing
Ply**

a\) Thickness (avg): 91 mils (2.3 mm) (ASTM D 5147)

b\) Thickness (min): 87 mils (2.2 mm) (ASTM D 5147)

c\) Weight (min per 100 ft² of coverage): 62 lb (3.0 kg/m²)

d\) Maximum filler content in elastomeric blend - 35% by weight

e\) Low temperature flexibility @ -13ºF (-25ºC): PASS (ASTM D 5147)

f\) Peak Load (avg) @ 73ºF (23ºC): 30 lbf/inch (5.3 kN/m) (ASTM D 5147)

g\) Peak Load (avg) @ 0ºF (-18ºC): 70 lbf/inch (12.3 kN/m) (ASTM D 5147)

h\) Ultimate Elongation (avg.) @ 73ºF (23ºC): 50% (ASTM D 5147)

i\) Dimensional Stability (max): 0.1% (ASTM D 5147)

j\) Compound Stability (min): 250ºF (121ºC) (ASTM D 5147)

k\) Approvals: UL Class listed, FM Approved (products shall bear seals
of approval)

l\) Reinforcement: fiberglass mat or other meeting the performance and
dimensional stability criteria

\> Siplast Paradiene 20 or approved equal

**2. Modified Bitumen Finish Ply**

a\) Thickness (avg): 138 mils (3.5 mm) (ASTM D 5147)

b\) Thickness at selvage (coating thickness) (avg): 118 mils (3.0 mm)
(ASTM D 5147)

c\) Thickness at selvage (coating thickness) (min): 114 mils (2.9 mm)
(ASTM D 5147)

d\) Weight (min per 100 ft² of coverage): 112 lb (5.4 kg/m²)

e\) Maximum filler content in elastomeric blend: 35% by weight

f\) Low temperature flexibility @ -13ºF (-25ºC): PASS (ASTM D 5147)

g\) Peak Load (avg) @ 73ºF (23ºC): 30 lbf/inch (5.3 kN/m) (ASTM D 5147)

h\) Peak Load (avg) @ 0ºF (-18ºC): 75 lbf/inch (13.2 kN/m) (ASTM D 5147)

i\) Ultimate Elongation (avg.) @ 73ºF (23ºC): 55% (ASTM D 5147)

j\) Dimensional Stability (max): 0.1% (ASTM D 5147)

k\) Compound Stability (min): 250ºF (121º C) (ASTM D 5147)

l\) Granule Embedment (max loss): 2.0 grams per sample (ASTM D 5147)

m\) Approvals: UL Class listed, FM Approved (products shall bear seals
of approval)

n\) Reinforcement: fiberglass mat or other meeting the performance and
dimensional stability criteria

o\) Surfacing: ceramic granules

\> Siplast Paradiene 30 FR - torchable grade or approved equal

**B. Flashing Membrane Assembly:** A flashing membrane assembly
consisting of a prefabricated, reinforced, Styrene-Butadiene-Styrene
(SBS) block copolymer modified asphalt membrane with a continuous,
channel-embossed metal-foil surfacing. The finish ply shall conform to
ASTM D 6298 and the following physical and mechanical property
requirements.

\> Siplast Veral flashing system, aluminum finish or approved equal

**1. Cant Backing Sheet for Wood/Plywood Surfaces to Receive Flashing
Coverage**

a\) Thickness (avg): 102 mils (2.6 mm) (ASTM D 5147)

b\) Thickness (min): 98 mils (2.5 mm) (ASTM D 5147)

c\) Weight (min per 100 ft² of coverage): 72 lb (3.5 kg/m²)

d\) Maximum filler content in elastomeric blend: 35% by weight

e\) Low temperature flexibility @ -13º F (-25º C) - PASS (ASTM D 5147)

f\) Peak Load (avg) @ 73ºF (23ºC): 30 lbf/inch (5.3 kN/m) (ASTM D 5147)

g\) Peak Load (avg) @ 0ºF (-18ºC): 75 lbf/inch (13.2 kN/m) (ASTM D 5147)

h\) Ultimate Elongation (avg.) @ 73ºF (23ºC): 50% (ASTM D 5147)

i\) Dimensional Stability (max): 0.1% (ASTM D 5147)

j\) Compound Stability (min - sheet): 250ºF (121ºC) (ASTM D 5147)

j\) Compound Stability (min -- adhesive coating): 212ºF (100ºC) (ASTM D
5147)

k\) Approvals: UL Class listed, FM Approved (products shall bear seals
of approval)

l\) Reinforcement: fiberglass mat or other meeting the performance and
dimensional stability criteria

m\) Back Surfacing: polyolefin film

\> Siplast Paradiene 20 SA or approved equal

**2. Metal-Clad Modified Bitumen Flashing Sheet**

a\) Thickness (avg): 142 mils (3.6 mm) (ASTM D 5147)

b\) Thickness (min): 138 mils (3.5 mm) (ASTM D 5147)

c\) Weight (min per 100 ft² of coverage): 92 lb (4.5 kg/m²)

d\) Coating Thickness -- back surface (min): 40 mils (1 mm) (ASTM D
5147)

e\) Maximum filler content in elastomeric blend: 35% by weight

f\) Low temperature flexibility @ 0º F (-18º C): PASS (ASTM D 5147)

g\) Peak Load (avg) @ 73ºF (23ºC): 85 lbf/inch (15 kN/m) (ASTM D 5147)

h\) Peak Load (avg) @ 0ºF (-18ºC): 180 lbf/inch (31.7 kN/m) (ASTM D
5147)

i\) Ultimate Elongation (avg) @ 73ºF (23ºC): 45% (ASTM D 5147)

i\) Tear-Strength (avg): 120 lbf (0.54 kN) (ASTM D 5147)

j\) Dimensional Stability (max): 0.2% (ASTM D 5147)

k\) Compound Stability (min): 225ºF (107ºC) (ASTM D 5147)

l\) Cyclic Thermal Shock Stability (maximum): 0.2% (ASTM D 6298)

m\) Approvals: UL Approved, FM Approved (products shall bear seals of
approval)

n\) Reinforcement: fiberglass scrim mat or other meeting the performance
and dimensional stability criteria

o\) Surfacing: aluminum metal foil

\> Siplast Veral Aluminum or approved equal

> **C. Catalyzed Acrylic Resin Flashing System:** A specialty flashing
> system consisting of a liquid-applied, fully reinforced,
> multi-component acrylic membrane installed over a prepared or primed
> substrate. The flashing system consists of a catalyzed acrylic resin
> primer, basecoat and topcoat, combined with a non-woven polyester
> fleece. The resin and catalyst are pre-mixed immediately prior to
> installation. The use of the specialty flashing system shall be
> specifically approved in advance by the membrane manufacturer for each
> application.
>
> \> Parapro 123 Flashing System by Siplast; Irving, TX or approved
> equal

2.03 ROOFING ACCESSORIES

**A. Roofing Adhesives**

**1. Mopping Asphalt:** Type IV asphalt certified for full compliance
with the requirements listed in Table I, ASTM D 312. Each container or
bulk shipping ticket shall indicate the equiviscous temperature, EVT,
the finished blowing temperature, FBT, and the flash point, FP. Mopping
asphalt shall be approved in writing by the roof membrane manufacturer.

\> Siplast PA-100 Asphalt by Siplast; Irving, TX or approved equal

**B. Bituminous Cutback Materials**

**1. Primer:** A high flash, quick drying, asphalt solvent blend which
meets or exceeds ASTM D 41 requirements.

\> Siplast PA-1125 Asphalt Primer by Siplast; Irving, TX or approved
equal

**2. Mastics:** An asphalt cutback mastic, reinforced with non-asbestos
fibers, used as a base for setting metal flanges conforming to ASTM D
4586 Type II requirements.

\> Siplast PA-1021 Plastic Cement by Siplast; Irving, TX or approved
equal

**C. Sealant:** A moisture-curing, non-slump elastomeric sealant
designed for roofing applications. The sealant shall be approved by the
roof membrane manufacturer for use in conjunction with the roof membrane
materials. Acceptable types are as follows:

\> Siplast PS-304 Elastomeric Sealant by Siplast; Irving, TX or approved
equal

**D. Ceramic Granules:** No. 11 grade specification ceramic granules of
color scheme matching the granule surfacing of the finish ply.

**E. Metallic Powder:** A finely graded metal dust as supplied or
approved by the membrane manufacturer, used for covering of bitumen
overruns over the foil surfaced membrane.

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

**G. Fasteners**

**1. Insulation Fasteners:** Insulation fasteners and plates shall be FM
Approved, and/or approved by the manufacturer of the primary roofing
products. The insulation fasteners shall provide attachment required to
meet the specified uplift performance and to restrain the insulation
panels against the potential for ridging. The fastening pattern for each
insulation panel to be used shall be as recommended by the insulation
manufacturer and approved by the manufacturer of the primary roofing
products. Acceptable insulation fastener manufacturers for specific deck
types are listed below.

**a) Wood/Plywood Decks:** Insulation mechanical fasteners for
wood/plywood decks shall be factory coated for corrosion resistance. The
fastener shall conform meet or exceed Factory Mutual Standard 4470 and
when subjected to 30 Kesternich cycles, show less than 15% red rust.
Acceptable insulation fastener types for wood/plywood decks are listed
below.

\- A fluorocarbon coated screw type roofing fastener having a minimum
0.245 inch thread diameter. Plates used in conjunction with the fastener
shall be a metal type having a minimum 3 inch diameter, as supplied by
the fastener manufacturer.

\> Parafast HD Fastener by Siplast; Irving, TX or approved equal

**2. Gypsum Sheathing Panel Fasteners for Wood/Plywood Substrates to
Receive Flashing Coverage:** Gypsum sheathing panel fasteners and plates
shall be FM Approved, and/or approved by the manufacturer of the primary
roofing products. The fastening pattern for each panel to be used shall
be as recommended by the panel manufacturer and approved by the
manufacturer of the primary roofing products. Acceptable panel fastener
manufacturers for specific substrate types are listed below.

**a) Wood/Plywood Substrates to Receive Flashing Coverage:** Gypsum
sheathing panel mechanical fasteners shall be factory coated for
corrosion resistance. The fastener shall conform meet or exceed Factory
Mutual Standard 4470 and when subjected to 30 Kesternich cycles, show
less than 15% red rust. Acceptable fastener types for wood/plywood
substrates are listed below.

\- A fluorocarbon coated screw type roofing fastener having a minimum
0.220 inch thread diameter. Plates used in conjunction with the fastener
shall be a metal type having a minimum 3 inch diameter, as supplied by
the fastener manufacturer.

\> Parafast Fastener by Siplast; Irving, TX or approved equal

**3. Flashing Reinforcing Sheet Fasteners for Wood/Plywood Substrates to
Receive Flashing Coverage:** Fasteners shall be approved by the
manufacturer of the primary roofing products. Acceptable fasteners for
specific substrate types are listed below.

**a) Wood/Plywood Substrates**

\- A 12 gauge, spiral or annular threaded shank, zinc coated steel
roofing fastener having a minimum 1 inch head.

\> Square Cap by W.H. Maze Co.; Peru, Ior equal

\> 12 Gauge Simplex Nail by the Simplex Nail and Manufacturing Co.,
Americus, Ga or approved equal

**4. Wood Nailer Fasteners** Wood blocking fasteners and plates shall be
FM Approved, and/or approved by the manufacturer of the primary roofing
products. Acceptable fastener manufacturers are listed below.

**a) Wood Blocking:** Mechanical fasteners for wood blocking shall be
factory coated for corrosion resistance. Acceptable fastener types are
listed below.

\- A fluorocarbon coated screw type roofing fastener having a minimum
0.220 inch thread diameter. Plates used in conjunction with the fastener
shall be a metal type having a minimum 3 inch diameter, as supplied by
the fastener manufacturer.

\> Parafast Fastener by Siplast; Irving, or approved equal

**H. Walktread:** A prefabricated, puncture resistant polyester core
reinforced, polymer modified bitumen sheet material topped with a
ceramic-coated granule wearing surface.

1\. Thickness: 0.217 in (5.5 mm)

2\. Weight: 1.8 lb/ft² (8.8 kg/m²)

3\. Width: 30 in (76.2 cm)

\> Paratread Roof Protection Material by Siplast; Irving, TX or approved
equal

2.04 RELATED COMPONENTS

**A. Rough Carpentry:** Lumber used for nailers, curbs, and cants shall
be No. 2 kiln dried (19% maximum moisture content after treatment),
grade marked, and surfaced on four sides. Lumber shall be salt treated
with Wolman Salts (wood shall retain 0.25 lbs. dry salt per cubic foot
of wood) or an approved equal.

**1. Perimeter Nailers for Edge Metal Securement.** Lumber shall have a
nominal 6 inch width with a thickness to match the height of the new
insulation assembly.

**2. Wood Sleepers And Blocking:** Lumber blocking, used for supporting
small rooftop and light air conditioning units shall have a 4 inch by 4
inch width and thickness. Wood blocking used to support small pipes
shall have a minimum 12 inch length. Lengths of wood sleepers for
supporting air conditioning units shall be such that a minimum of 12
inches shall extend beyond each unit at both sides.

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

**C. Lead Drain Flashings:** Formable type, weighing a minimum of 4 lb.
per square foot; in sheets of minimum 30 inch x 30 inch dimension.

**D. Lead Pipe Flashings:** Preformed from sheet stock weighing a
minimum of 4 lb. per square foot, and soldered with a minimum 4 inch
perimeter flange with a sleeve opening fabricated to fit closely around
the penetration without forcing. Lead sleeve length shall be of
sufficient height to allow a minimum of 1 inch to be crimped inside of
the pipe stack.

**E. Fabricated Metal:** Fabricate the following fabricated metal
components from minimum 24 gauge, G 90 galvanized steel, primed and
coated with a 70% Kynar based fluoropolymer coating of 1.0
[+]{.underline} 0.1 mil total dry film thickness. Color to be selected
by the owner.

**1. Metal Edge/Fascia:** Fabricate metal edge/fascia incorporating a 4
inch perimeter flange with a minimum 1/4 inch gravel stop rise. The
fascia shall be of sufficient width to adequately cover the roof
assembly/wall juncture. The bottom edge of the fascia shall have a
minimum 1/2 inch drip edge, hemmed and formed at 30 degrees and shall be
fabricated for attachment to a continuous cleat at the outside base of
the nailer. Fabricate metal edge/fascia in maximum 10 feet sections.
Fabricate corner pieces of metal edge fascia with 1 foot sections in
either direction from the corner. Fabricate cover plates and accessory
components in accordance with SMACNA guidelines.

**2. Metal Pipe Flashings:** Fabricate metal pipe flashings in a
two-component assembly in accordance with the following:

\- The first component shall be a metal roof jack having a minimum 4
inch perimeter flange, and a sleeve opening to fit closely around the
penetration without forcing, with a minimum 6 inch height. Fasten and
solder metal laps.

\- The second component shall be a metal, water tight umbrella,
fabricated to be mechanically secured tightly around the roof
penetration and extend beyond the roof jack opening by a minimum radius
of 3 inches. Caulk top edge of the watertight umbrella using an approved
sealant.

**[PART 3 EXECUTION]{.underline}**

3.01 FIELD QUALITY CONTROL

**A. Pre-Job Conference:** Conduct a pre-job conference to include the
designer, Owner, roofing Contractor and manufacturer\'s representative
prior to application of roofing.

**B. Foremen:** Provide the roofing foreman with a copy of these
specifications to be available at the job site at all times. The
presence of specifications and an inspector shall not relieve the
Contractor of strict compliance with the manufacturer\'s specifications,
detail drawings, and/or approved material requirements.

**C. Deck Penetrations:** Verify that work penetrating the roof deck, or
which may otherwise affect the roofing application, has been properly
completed.

**D. Final Inspection -- post installation meeting:** Arrange a meeting
at the completion of the project to be 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 Contractor and the manufacturer\'s
representative. Complete, sign, and mail the punch list form to the
manufacturer\'s headquarters.

3.02 PREPARATION

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

**B. Remove All Existing:**

\- Surface gravel

\- Roof membrane

\- Insulation

\- Base flashings

\- Edge metal

\- Flanged metal flashings

\- Cants

\- Walkways

\- Non functional penetrations/curbs

\- Drain assemblies

\- Vapor retarder

\- Metal trim, counterflashing

**C. Damaged And/Or Deteriorated Deck:** Inspect decking; make necessary
repairs or replace sections of deck that cannot be repaired. Submit a
unit price for replacement of sections of roof deck.

**D. Wall Preparation:** Repair minor cracks, surface irregularities,
and open joints in masonry walls using a quick dry grout mix to ensure a
smooth, even surface for application of the roofing/flashing membranes.

**E. Existing Curbs:** Raise all existing curbs to accommodate a new
minimum height of 8 inches.

3.03 SUBSTRATE REQUIREMENTS

**A. Preparation of Wood/Plywood Substrates to Receive Flashing
Coverage:** Mechanically attach the gypsum sheathing panels to all
wood/plywood substrates that will be covered with the specified flashing
membrane, using the specified screws/plates, at 12 inches o.c.
staggered. Cut the cant backing sheet into 12 inch widths and peel the
release film from the back of the sheet. Set the sheet into place
extending 6 inches onto the field of the roof area and 6 inches up the
gypsum sheathing panel surface utilizing minimum 3 inch side laps. Set
the cant into place prior to installation of the roof membrane base ply.

**B. Roof Decks:** Structural roof decks should properly provide
sufficient strength to support anticipated dead and live loads and
normal construction traffic without excessive deflection or movement.
All openings, walls or projections through the roof deck should be
completed before application of the roof membrane is begun. The deck
should be constructed and necessary deck repairs made according to the
deck manufacturer\'s specifications following best established
practices.

**1. Wood:** Wood decks should be constructed of dry, well-seasoned
lumber of minimum 1 inch thickness, tongue and groove, shiplap or
splined together at side joints and matched at end joints. Boards should
have a bearing on rafters at each end and be securely nailed. Cracks
wider than 1/4 inch and knot holes larger than 1 inch in diameter should
be covered with sheet metal.

3.04 SUBSTRATE PREPARATION

**A. Perimeter Wood Nailers:** Install perimeter wood nailers in
accordance with the guidelines set forth in latest edition of FM Global
Property Loss Prevention Data Sheet 1-49.

**B. Insulation:** Install insulation panels with end joints offset;
edges of the panels shall be in moderate contact without forcing applied
in strict accordance with the insulation manufacturer\'s requirements
and the following instructions. 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 insulation applied in hot asphalt or
insulation adhesive.

**1. Insulation - single layer:** Mechanically attach the insulation
panels, using the specified fasteners, at a rate of 1 fastener for every
2 square feet of panel area (16 per 4\' x 8\' panel). Increase the
fastening frequency by 50% at the perimeter of the roof and 100% in the
corners.

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

**3. 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.

3.05 ROOF MEMBRANE INSTALLATION - GENERAL

**A. Membrane Application:** Apply roofing in accordance with roofing
system manufacturer\'s instructions and the following requirements.
Application of roofing membrane components shall immediately follow
application of base sheet and/or insulation as a continuous operation.

**B. Aesthetic Considerations:** An aesthetically pleasing overall
appearance of the finished roof application is a standard requirement
for this project. Make necessary preparations, utilize recommended
application techniques, apply the specified materials including granules
and metallic powder, and exercise care in ensuring that the finished
application is acceptable to the Owner.

**C. Priming:** Prime metal and concrete and masonry surfaces with a
uniform coating of the specified asphalt primer.

**D. Kettles And Tankers:** Kettles and tankers shall be equipped with
accurate, fully readable thermometers. Do not heat asphalt to or above
its flash point. Avoid heating at or above the FBT, should conditions
make this impractical, heating must be no more than 25ºF below the EVT
and no more than 25ºF above EVT.

**E. Asphalt Temperatures:** If the EVT information is not provided, the
following asphalt temperature shall be observed. Maximum heating
temperature shall be 525ºF (274ºC). Minimum application temperature
shall be 400ºF (204ºC).

**F. Asphalt Moppings:** Ensure that all moppings do not exceed a
maximum of 25 lb/sq. Mopping shall be total in coverage, leaving no
breaks or voids.

**G. Bitumen Consistency:** Cutting or alterations of bitumen, primer,
and sealants will not be permitted.

**H. Roofing Application:** Apply all layers of roofing free of
wrinkles, creases or fishmouths. Exert sufficient pressure on the roll
during application to ensure prevention of air pockets.

1\. Apply all layers of roofing perpendicular to the slope of the deck.

2\. Fully bond the base ply to the prepared substrate, utilizing minimum
3 inch side and end laps. Apply each sheet directly behind the asphalt
applicator. Cut a dog ear angle at the end laps on overlapping selvage
edges. Using a clean trowel, apply top pressure to top seal T-laps
immediately following sheet application. Stagger end laps a minimum of 3
feet.

3\. Fully bond the finish ply to the base ply, utilizing minimum 3 inch
side and end laps. Apply each sheet directly behind the torch
applicator. Stagger end laps of the finish ply a minimum 3 feet. Cut a
dog ear angle at the end laps on overlapping selvage edges. Using a
clean trowel, apply top pressure to top seal T-laps immediately
following sheet application. Stagger side laps of the finish ply a
minimum 12 inches from side laps in the underlying base ply. Stagger end
laps of the finish ply a minimum 3 feet from end laps in the underlying
base ply.

4\. Maximum sheet lengths and special fastening of the specified roof
membrane system may be required at various slope increments where the
roof deck slope exceeds 1/2 inch per foot. The manufacturer shall
provide acceptable sheet lengths and the required fastening schedule for
all roofing sheet applications to applicable roof slopes.

**J. Granule Embedment:** Broadcast mineral granules over all bitumen
overruns on the finish ply surface, while the bitumen is still hot or
the adhesive is soft, to ensure a monolithic surface color.

**K. Flashing Application - masonry surfaces:** Flash masonry parapet
walls and curbs using the reinforcing sheet and the metal foil flashing
membrane. After the base ply has been applied to the top of the cant,
fully adhere the reinforcing sheet, utilizing minimum 3 inch side laps
and extend a minimum of 3 inches onto the base ply surface and 3 inches
up the parapet wall above the cant. After the final roofing ply has been
applied to the top of the cant, prepare the surface area that is to
receive flashing coverage by torch heating granular surfaces or by
application of asphalt primer; allowing primer to dry thoroughly. Torch
apply the metal foil-faced flashing into place using three foot widths
(cut off the end of roll) always lapping the factory selvage edge.
Stagger the laps of the metal foil flashing layer from lap seams in the
reinforcing layer. Extend the flashing sheet a minimum of 4 inches
beyond the toe of the cant onto the prepared surface of the finished
roof and up the wall to the desired flashing height. Exert pressure on
the flashing sheet during application to ensure complete contact with
the wall/roof surfaces, preventing air pockets; this can be accomplished
by using a damp sponge or shop rag. Check and seal all loose laps and
edges. Nail the top edge of the flashing on 9 inch centers. (See
manufacturer\'s schematic for visual interpretation).

**L. Flashing Application -- surfaces sheathed with gypsum sheathing
panels:** After the gypsum sheathing panel and cant backing sheet have
been installed, flash parapet walls and curbs with the specified
reinforcing sheet and the metal foil flashing membrane. The reinforcing
sheet shall have minimum 3 inch side laps and extend a minimum of 3
inches onto the base ply surface and to the top of the parapet wall or
curb. Using the specified fasteners, mechanically attach the reinforcing
sheet through the field of the sheet to the vertical flashing surface on
12 inch centers from the top of the cant to the top of the wall or curb.
Fully adhere the remainder of the flashing reinforcing sheet that
extends over the cant and roof level. Using a Leister Hand Welding Tool,
seal the laps between flashing reinforcing sheets. After the final
roofing ply has been applied to the top of the cant, prepare the surface
area that is to receive flashing coverage by torch heating granular
surfaces or by application of asphalt primer; allowing primer to dry
thoroughly. Torch apply the metal foil-faced flashing into place using
three foot widths (cut off the end of roll) always lapping the factory
selvage edge. Stagger the laps of the metal foil flashing layer from lap
seams in the reinforcing layer. Extend the flashing sheet a minimum of 4
inches beyond the toe of the cant onto the prepared surface of the
finished roof and up the wall to the desired flashing height. Exert
pressure on the flashing sheet during application to ensure complete
contact with the wall/roof surfaces, preventing air pockets; this can be
accomplished by using a damp sponge or shop rag. Check and seal all
loose laps and edges. Nail the top edge of the flashing on 9 inch
centers. (See manufacturer\'s schematic for visual interpretation).

**M. Catalyzed Acrylic Resin Flashing System:** 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.

**N. Use of Metallic Powder:** Broadcast metallic powder over all
bitumen overruns on the metal foil membrane surface while the bitumen is
still hot to ensure a monolithic surface color.

**O. Water Cut-Off:** At end of day\'s work, or when precipitation is
imminent, construct a water cut-off at all open edges. Cut-offs can be
built using asphalt or plastic cement and roofing felts, constructed to
withstand protracted periods of service. Cut-offs must be completely
removed prior to the resumption of roofing.

3.06 RELATED COMPONENTS - INSTALLATION

**A. Edge Metal:** Completely prime metal flanges and allow to dry prior
to installation. Turn the base ply down 2 inches past the roof edge and
over the nailer. After the base ply and continuous cleat (if applicable)
have been installed, set the flange in mastic and stagger nail every 3
inches on center. Strip-in the flange using the stripping-ply material,
extending a minimum of 4 inches beyond the edge of the flange. Terminate
the finish ply at the gravel-stop rise of the edge metal. SEE ITEM:
SEALANT, for finish of this detail.

**B. Lead Pipe Flashings:** Completely prime the lead flanges and allow
to dry prior to installation. After the base ply has been applied, set
the flange in mastic and strip-in the flange using the stripping-ply
material, extending a minimum of 4 inches beyond the edge of the flange.
Terminate the finish ply at the flange-sleeve juncture of the pipe
flashing. SEE ITEM: SEALANT for finish of this detail.

**C. Lead Drain Flashings:** Completely prime the lead drain flashing
and allow to dry prior to installation. After the base ply has been
applied, set the lead flashing sheet in mastic and form to turn down
inside of the drain bowl. Ply-in the perimeter of the lead flashing
using an additional layer of the base ply material, overlapping the
perimeter of the lead a minimum of 4 inches. Terminate the finish ply to
extend beneath the clamping ring seal. Install the clamping ring with
all bolts in place.

**D. Light Air Unit Supports:** Separate light air handling units that
are supported by wood sleepers (not supported by a roof curb) from the
new roof assembly using the manufacturer\'s walktread-roof protection
material. Cut each walktread pad to a size which extends a minimum of 2
inches beyond the perimeter of each sleeper block. Set the walktread pad
dry over the new assembly. Set each sleeper block dry over the walktread
pad.

**E. Small Pipe Supports:** Support all gas lines and conduits which are
a maximum of 1 inch diameter and run horizontally over the roof membrane
surface using wood blocking and the manufacturer\'s walktread - roof
protection material. The blocking shall be 4 inches by 4 inches by 12
inches in size. Cut each walktread pad to a size which extends a minimum
of 2 inches beyond the perimeter of the blocking. Loosely secure the
pipe to allow movement over the 6 inch center of each block; the spacing
for the blocks shall be of adequate distance to prevent sagging of the
pipe and to prevent the pipe from coming into contact with the new roof
assembly. Set the walktread dry over the new roof assembly. Set each
pipe support block dry over the walktread pad.

**F. Metal Pipe Flashings:** Completely prime the metal pipe flanges and
allow to dry prior to installation. After the base ply has been applied,
set the flanges in mastic and strip-in the flange using the
stripping-ply material, extending a minimum of 4 inches beyond the edge
of the flange. Terminate the finish ply at the flange-sleeve juncture of
the pipe flashing. Install a watertight umbrella to the penetration,
completely covering the opening of the pipe flashing. SEE ITEM: SEALANT
for finish of this detail.

**G. Walktread:** Cut the walktread into maximum 5 foot lengths and
allow to relax until flat. Adhere the sheet using the specified plastic
cement. Apply the specified cement in a 3/8 inch thickness to the back
of the product in 5 inch by 5 inch spots in accordance with the pattern
as supplied by the walktread manufacturer. Walk-in each sheet after
application to ensure proper adhesion. Use a minimum spacing of 2 inches
between sheets to allow for proper drainage.

**H. Sealant:** Caulk all exposed finish ply edges at the transition to
metal flashings incorporated into the roof system with a smooth
continuous bead of the specified sealant.

3.07 SPECIAL CONDITIONS

**A. Site Condition:** Leave all areas around job site free of debris,
roofing materials, equipment and related items after completion of job.

**B. Notification Of Completion:** Notify the manufacturer by means of
manufacturer\'s printed Notification of Completion form of job
completion in order to schedule a final inspection date.

**C. Final Inspection**

**1. Post-Installation Meeting:** 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 Contractor and the manufacturer\'s representative.
Complete, sign, and mail the punch list form to the manufacturer\'s
headquarters.

**2. Drain Verification:** At final inspection of all work, verify that
all drains and scuppers, are functioning properly. Ensure that roof
drains have adequate strainers.

**3. Air Handling Units:** Reconnect all ductwork, electrical and supply
connections. At final inspection, verify that all connections are
restored to a complete working, watertight, and safe condition,
following SMACNA standards.

**D. Issuance Of The Guarantee:** Complete all post installation
procedures and meet the manufacturer\'s final endorsement for issuance
of the specified guarantee.