Addendum Two .pdf

COMMONWEALTH OF KENTUCKY

DEPARTMENT FOR FACILITIES AND SUPPORT SERVICES

DIVISION OF ENGINEERING AND CONTRACT ADMINISTRATION

INVITATION TO BID NO: RFB-268-25

FOR: Main Kitchen & Connector Roof Replacement Kentucky Correctional Institute for Women Department of Corrections Pewee Valley, Kentucky

DATE: June 25, 2025

RFB-785-2500000730

ADDENDUM NO. Two (2)

BIDDER SHALL CONFORM TO THE FOLLOWING CHANGES AS SAME SHALL BECOME BINDING

UPON THE CONTRACT TO BE ISSUED IN RESPONSE TO THIS INVITATION TO BID.

Item 1: Refer to addendum to be distributed by Lynn Imaging for all additions, deletions, and/or changes to specifications and/or drawings.

END OF ADDENDUM

Invitation to Bid No. RFB-268-25 For: Main Kitchen & Connector Roof Replacement Kentucky Correctional Institute for Women Department of Corrections Pewee Valley, Kentucky

Susan Ward, Statewide Procurement Analyst II Division of Engineering and Contract Administration

ADDENDUM NO. 2 009113 - 1

D.O.C. - K.C.I.W. – Main Kitchen & Connector Roof Replacement Kentucky Correction Institution for Women

Pewee Valley, Kentucky; Acct No: 527-CCON-IW48-00

SECTION 009113 – ADDENDUM NO. 2

PART 1 - GENERAL

1.1 GENERAL

A. This Addendum forms a part of the Contract Documents and modifies the original Bidding

Documents and previously issued Addenda, as noted below.

1. All unmodified portions remain if full force and effect.

2. Acknowledge receipt of this Addendum in the space provided on the Bid Form.

3. Failure to do so may subject Bidder to disqualification

B. Summary of Attachments:

1. Summary of Documents Attached for Reference: None.

2. Summary of Project Manual Documents Attached:

a. Supplemental Specifications: None.

b. Revised Specifications:

1) SECTION 075216 - SBS MODIFIED BITUMINOUS MEMBRANE

ROOFING

3. Summary of Drawings Attached: The following drawings are attached to and are part of this Addendum:

a. Supplemental Drawings: None.

b. Revised Drawings: None.

C. Summary of Deletions: None.

1.2 CHANGES TO PRIOR ADDENDA

A. None.

1.3 CHANGES TO PROCUREMENT AND CONTRACTING REQUIREMENTS

A. None.

1.4 CHANGES TO GENERAL REQUIREMENTS

A. None.

Kentucky Correction Institution for Women

Pewee Valley, Kentucky; Acct No: 527-CCON-IW48-00

ADDENDUM NO. 2 009113 - 2

1.5 CHANGES TO SPECIFICATIONS

A. SECTION 075216 - SBS MODIFIED BITUMINOUS MEMBRANE ROOFING:

1. REVISE Article 1.10 WARRANTY, Paragraph A, Subparagraph 2 to read as follows:

"2. Warranty Period: 20 years from date of Substantial Completion."

1.6 CHANGES TO DRAWINGS

A. Changes to Architectural Drawings: None

PART 2 - PRODUCTS (NOT USED)

PART 3 - EXECUTION (NOT USED)

END OF ADDENDUM NO. 2

Pewee Valley, Kentucky; Acct No: 527-CCON-IW48-00

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 1

SECTION 075216 - SBS MODIFIED BITUMINOUS MEMBRANE

ROOFING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Styrene-butadiene-styrene (SBS)-modified bituminous protected membrane roofing.

2. Roof insulation.

1.2 DEFINITIONS

A. Roofing Terminology: Definitions in ASTM D1079 and glossary of NRCA's "The NRCA

Roofing Manual: Membrane Roof Systems" apply to Work of this Section.

B. "Approved": When used to convey Architect's action on Contractor's submittals, applications, and requests, "approved" is limited to Architect's duties and responsibilities as stated in the

Conditions of the Contract.

C. "Directed": A command or instruction by Architect. Other terms including "requested,"

"authorized," "selected," "required," and "permitted" have the same meaning as "directed."

D. "Indicated": Requirements expressed by graphic representations or in written form on

Drawings, in Specifications, and in other Contract Documents. Other terms including "shown,"

"noted," "scheduled," and "specified" have the same meaning as "indicated."

E. "Regulations": Laws, ordinances, statutes, and lawful orders issued by authorities having jurisdiction, and rules, conventions, and agreements within the construction industry that control performance of the Work.

F. "Furnish": Supply and deliver to Project site, ready for unloading, unpacking, assembly, installation, and similar operations.

G. "Install": Unload, temporarily store, unpack, assemble, erect, place, anchor, apply, work to dimension, finish, cure, protect, clean, and similar operations at Project site.

H. "Provide": Furnish and install, complete and ready for the intended use.

I. "Project Site": Space available for performing construction activities. The extent of Project site is shown on Drawings and may or may not be identical with the description of the land on which Project is to be built.

J. “Manufacturer Qualifications”: A firm experienced in manufacturing products or systems similar to those indicated for this Project and with a record of successful in-service

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 2

performance, as well as sufficient production capacity to produce required units. As applicable, procure products from manufacturers able to meet qualification requirements, warranty requirements, and technical or factory-authorized service representative requirements.

K. “Installer Qualifications”: A firm or individual experienced in installing, erecting, applying, or assembling work similar in material, design, and extent to that indicated for this Project, whose work has resulted in construction with a record of successful in-service performance.

1.3 PREINSTALLATION MEETINGS

A. Preinstallation Roofing Conference: Conduct conference at Project Site.

1. Meet with Owner, Architect, Owner's insurer if applicable, testing and inspecting agency representative, roofing Installer, roofing system manufacturer's representative, deck

Installer, air barrier Installer, and installers whose work interfaces with or affects roofing, including installers of roof accessories and roof-mounted equipment.

2. Review methods and procedures related to roofing installation, including manufacturer's written instructions.

3. Review and finalize construction schedule, and verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays.

4. Examine deck substrate conditions and finishes for compliance with requirements, including flatness.

5. Review structural loading limitations of roof deck during and after roofing.

6. Review base flashings, special roofing details, roof drainage, roof penetrations, equipment curbs, and condition of other construction that affects roofing system.

7. Review governing regulations and requirements for insurance and certificates if applicable.

8. Review temporary protection requirements for roofing system during and after installation.

9. Review roof observation and repair procedures after roofing installation.

1.4 ACTION SUBMITTALS

A. Product Data: For each type of product.

1. For insulation and roof system component fasteners, include copy of FM Approvals'

RoofNav listing.

B. Shop Drawings: Include plans, sections, details, and attachments to other work, including the following:

1. Base flashings and membrane terminations.

2. Layout and thickness of insulation, including:

a. Insulation fastening patterns for corner, perimeter, and field-of-roof locations.

3. Crickets, saddles, and tapered edge strips, including slopes.

4. Flashing details at penetrations.

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 3

C. Samples for Verification: For the following products:

1. Cap sheet, of color required.

2. Flashing sheet, of color required.

1.5 INFORMATIONAL SUBMITTALS

A. Qualification Data: For Installer and manufacturer.

B. Manufacturer Certificates:

1. Performance Requirement Certificate: Signed by roof membrane manufacturer, certifying that roofing system complies with requirements specified in "Performance Requirements"

Article.

a. Submit evidence of compliance with performance requirements.

C. Sample Warranties: For manufacturer's special warranties.

D. Report: Manufacturer's technical personnel’s written report of Final Inspection.

1.6 CLOSEOUT SUBMITTALS

A. Maintenance Data: For roofing system to include in maintenance manuals.

1.7 QUALITY ASSURANCE

A. Manufacturers: A qualified manufacturer that is listed in FM Approvals' RoofNav for roofing system identical to that used for this Project.

B. Installer Qualifications: A qualified firm that is approved, authorized, or licensed by roofing system manufacturer to install manufacturer's product and that is eligible to receive manufacturer's special warranty.

1.8 DELIVERY, STORAGE, AND HANDLING

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

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

1. Protect stored liquid material from direct sunlight.

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

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 4

C. Protect roof insulation materials from physical damage and from deterioration by sunlight, moisture, soiling, and other sources.

D. Handle and store roofing materials, and place equipment in a manner to avoid permanent deflection of deck.

1.9 FIELD CONDITIONS

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

1.10 WARRANTY

A. Special Warranty: Manufacturer agrees to repair or replace components of roofing system that fail in materials or workmanship within specified warranty period.

1. Special warranty includes roof membrane, base flashings, roof insulation, fasteners, cover boards, roofing accessories, and other components of roofing system.

2. Warranty Period: 30 20 years from date of Substantial Completion.

3. Manufacturers No Dollar Limit (NDL) Total Systems Warranty Form, without monetary limitation, non-prorated.

4. Warranty shall cover wind speeds less than, or equal to 72 mph.

5. Where more than one building is part of the project, a separate warranty shall be issued for each building.

B. Special Project Warranty: Submit roofing Installer's warranty, signed by Installer, covering the

Work of this Section, including all components of roofing system, such as roof membrane, base flashing, roof insulation, fasteners, and cover boards, products, for the following warranty period:

1. Warranty Period: 2 years from date of Final Completion.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. General Performance: Installed roofing system and flashings shall withstand specified uplift pressures, thermally induced movement, and exposure to weather without failure due to defective manufacture, fabrication, installation, or other defects in construction. Roof system and flashings shall remain watertight.

1. Accelerated Weathering: Roof membrane shall withstand 2000 hours of exposure when tested according to ASTM G152, ASTM G154, or ASTM G155.

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 5

2. Impact Resistance: Roof membrane to resist impact damage when tested according to

ASTM D3746/D3746M, ASTM D4272/D4272M, or the "Resistance to Foot Traffic

Test" in FM Approvals 4470.

B. Wind Uplift Resistance: Design roofing system to resist the wind uplift pressures indicated in the “Report of Roof System Design Wind-load Analysis” Report attached to this Section for each Zone of each building when tested according to FM Approvals 4474, UL 580, or UL 1897.

Those reports are as follows:

1. Report of Roof System Design Wind-load Analysis, Main Building Connector.

C. FM Approvals' RoofNav Listing: Roof membrane, base flashings, and component materials comply with requirements in FM Approvals 4450 or FM Approvals 4470 as part of a roofing system, and are listed in FM Approvals' RoofNav for Class 1 or noncombustible construction, as applicable. Identify materials with FM Approvals Certification markings.

1. Fire/Windstorm Classification: Class 1A-90.

2. Hail-Resistance Rating: FM 1-34 SH.

D. Material Compatibility: Roofing materials shall be compatible with one another and adjacent materials under conditions of service and application required, as demonstrated by roof membrane manufacturer based on testing and field experience.

E. Exterior Fire-Test Exposure: ASTM E108 or UL 790, Class A; for application and roof slopes indicated; testing by a qualified testing agency.

1. Identify products with appropriate markings of applicable testing agency.

F. Fire-Resistance Ratings: Comply with fire-resistance-rated assembly designs indicated.

1. Identify products with appropriate markings of applicable testing agency.

2.2 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. Johns Manville; a Berkshire Hathaway company.

2. Soprema.

3. Siplast, Inc.

4. Firestone Building Products

B. Source Limitations: Obtain components including, but not limited to: roof insulation, fasteners, roof membrane, roofing mastics, PMMA flashing system, auxiliary roofing materials, accessories, and asphalt materials for roofing system from same manufacturer as membrane roofing or manufacturer approved by membrane roofing manufacturer.

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 6

2.3 BASE SHEET MATERIALS

A. SBS-Modified Bitumen Fiberglass Mat Base Sheet: ASTM D6163 or ASTM D6164, Type I or

Type II, Grade S, SBS-modified asphalt sheet, reinforced with fiberglass fabric or polyester fabric; smooth surfaced; suitable for cold adhesive or hot asphalt application method.

1. Maximum filler content in elastomeric blend – 35% by weight.

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

2.4 CAP SHEET MATERIAL

A. Granule-Surfaced Roofing Cap Sheet: ASTM D6163, Type I, Grade G, SBS-modified asphalt sheet, reinforced with fiberglass fabric; suitable for cold adhesive asphalt application method.

1. Granule Color: White.

2. Maximum filler content in elastomeric blend – 35% by weight.

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

2.5 BASE FLASHING SHEET MATERIALS

A. Backer Sheet: ASTM D6163, Type I or II, Grade S, SBS-modified asphalt sheet, reinforced with glass fibers; smooth surfaced; suitable for application method specified.

B. SBS-Modified Asphalt Metal-Foil-Surfaced Flashing Sheet: ASTM D6298, metal-foil-surfaced

SBS-modified asphalt sheet (reinforced with glass fibers); suitable for application method specified, and as follows:

1. Foil Surfacing: Aluminum.

2. Maximum filler content in elastomeric blend – 35% by weight.

3. Ultimate Elongation @ 73ºF (23ºC): 45% (ASTM D 5147)

C. Fluid applied, 2 component, catalyzed polymethyl methacrylate (PMMA), liquid resin, reinforced flashing system consisting of the following components:

1. PMMA Primer.

2. Base coat.

3. Non-woven, polyester, fleece sheet reinforcement.

4. Top coat.

2.6 AUXILIARY ROOFING MATERIALS

A. General: Auxiliary materials recommended by roofing manufacturer for intended use and compatible with other roofing components.

1. Adhesive and Sealants: Comply with VOC limits of authorities having jurisdiction.

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 7

B. Catalyzed Acrylic Resin Flashing System: A reinforced, multi-component, flexible

Poly(methyl methacrylate) (PMMA) based resin flashing system consisting of a catalyzed acrylic resin primer, basecoat and topcoat, combined with a non-woven polyester fleece.

1. Basis of Design: Subject to compliance with the requirements provide Parapro 123

Flashing System by Siplast®.

2. Flashing System Primer: Catalyzed acrylic resin flashing system manufacturer’s recommended primer.

C. Prefabricated Pipe Flashings: As recommended by roof membrane manufacturer.

D. Cold-Applied Asphalt Adhesive: ASTM D3019, Type III, roof membrane manufacturer's standard asphalt-based, one- or two-part, asbestos-free, cold-applied adhesive, specially formulated for compatibility and use with roofing membrane and base flashings.

E. Asphalt Roofing Cement: ASTM D4586, Type II, asbestos free, of consistency required by roofing system manufacturer for application.

F. Mastic Sealant: Polyisobutylene, plain or modified bitumen; nonhardening, nonmigrating, nonskinning, and nondrying.

G. Insulation Cant Strips: Provide one of the following based on roofing member manufacturer’s written recommendation:

1. Perlite insulation board, ASTM C728.

2. Cellulosic-fiber insulation board, ASTM C208, Type II, Grade 1.

H. Wood Blocking and Nailers: As specified in Section 061053 "Miscellaneous Rough

Carpentry."

I. Fasteners: Factory-coated steel fasteners and metal or plastic plates complying with corrosion-resistance provisions in FM Approvals 4470, designed for fastening roofing components to substrate; tested by manufacturer for required pullout strength, and acceptable to roofing system manufacturer.

J. Metal Termination Bars: Manufacturer's standard, predrilled stainless-steel or aluminum bars, approximately 1 by 1/8 inch thick; with anchors.

K. Solvent-Free Adhesive: Manufacturer’s standard single component, solvent-free, non-toxic adhesive for application on metal-foil-surfaced flashing sheets.

1. VOC Content: Not more than 32 g/L average.

L. Metal Flashing Sheet: As specified in Section 076200 "Sheet Metal Flashing and Trim."

M. Miscellaneous Accessories: Provide accessories recommended by roofing system manufacturer.

1. Pad Size: 36 by 36 inches.

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 8

N. Catalyzed Acrylic Resin Flashing System: A reinforced, multi-component, flexible

Poly(methyl methacrylate) (PMMA) based resin flashing system consisting of a catalyzed acrylic resin primer, basecoat and topcoat, combined with a non-woven polyester fleece.

1. Basis of Design: Subject to compliance with the requirements provide Parapro 123

Flashing System by Siplast®.

2. Flashing System Primer: Catalyzed acrylic resin flashing system manufacturer’s recommended primer.

2.7 ROOF INSULATION

A. General: Preformed roof insulation boards, manufactured or approved by roof membrane manufacturer, approved for use in FM Approvals' RoofNav listed roofing assemblies.

B. Polyisocyanurate Board Insulation: ASTM C 1289, Type II, Class 1, Grade 2, felt or glass-fiber mat facer on both major surfaces.

1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

a. Apache Products Company.

b. Atlas Roofing Corporation.

c. Hunter Panels.

d. Johns Manville; a Berkshire Hathaway company.

2. Board size: 48 by 48 by 2.2 inches.

C. Provide preformed saddles, crickets, tapered edge strips, and other insulation shapes where indicated for sloping to drain.

1. Where roof slope in field is 1/8:12, fabricate to slopes of 1/4 inch per 12 inches or as otherwise indicated on Drawings

2. Where roof slope in field is 1/4:12, fabricate to slopes of 1/2 inch per 12 inches or as otherwise indicated on Drawings

3. Minimum Thickness: 1/2 inch.

2.8 INSULATION ACCESSORIES

A. General: Roof insulation accessories recommended by insulation manufacturer for intended use and compatible with other roofing system components.

B. Fasteners: Factory-coated steel fasteners and metal or plastic plates complying with corrosion-resistance provisions in FM Approvals 4470, designed for fastening roof insulation and cover boards to substrate, and acceptable to roofing system manufacturer.

C. Insulation Adhesive: Provide one of the following of insulation manufacturer's recommended adhesive formulated to attach roof insulation to substrate or to another insulation layer as follows:

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 9

1. Modified asphaltic, asbestos-free, cold-applied adhesive.

2. Bead-applied, low-rise, one-component or multicomponent urethane adhesive.

3. Full-spread spray-applied, low-rise, 2-component urethane adhesive.

D. Tapered Edge Strips: Provide one of the following based on roofing member manufacturer’s written recommendation:

1. Perlite insulation board, ASTM C 728.

2. Cellulosic-fiber insulation board, ASTM C 208, Type II, Grade 1.

E. Cover Boards: Provide one of the following types of cover boards:

1. Cover Board: ASTM C208, Type II, Grade 2, cellulosic-fiber insulation board, 1/2 inch thick.

2. Cover Board: ASTM C728, Type 2, high density, expanded perlite board insulation with reinforcing cellulosic fibers, 1/2 inch.

2.9 ASPHALT MATERIALS

A. Asphalt Primer: ASTM D41.

B. Roofing Asphalt: ASTM D312, Type III or IV as recommended by roofing system manufacturer for application.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions, with Installer present, for compliance with requirements and other conditions affecting performance of the Work:

1. Verify that roof openings and penetrations are in place, curbs are set and braced, and roof-drain bodies are securely clamped in place.

2. Verify that wood cants, blocking, curbs, and nailers are securely anchored to roof deck at penetrations and terminations.

3. Verify that deck is securely fastened with no projecting fasteners and with no adjacent units in excess of 1/16 inch out of plane relative to adjoining deck.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

C. Proceeding with installation indicates substrates, areas, and conditions are acceptable to

Contractor for installation of roofing system.

3.2 PREPARATION

A. Clean substrate of dust, debris, moisture, and other substances detrimental to roofing installation, according to roofing system manufacturer's written instructions.

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 10

1. Remove sharp projections.

3.3 SUMMARY OF WORK

A. The following is a general outline of roof work to be performed:

1. Roofing System Description Over Existing Metal Deck:

a. Mechanically attach base layer of 2.2” polyisocyanurate insulation to metal deck.

b. Adhere base layer of 2.2” polyisocyanurate insulation to existing metal decking with hot roofing asphalt.

c. Install second layer of 2.2” polyisocyanurate insulation with hot roofing asphalt.

d. Install tapered polyisocyanurate crickets and saddles, with hot roofing asphalt.

e. Install one layer of cover board with hot roofing asphalt.

f. Install one ply of smooth surface SBS modified bitumen fiberglass mat base sheet with hot roofing asphalt.

g. Install one ply of granule surfaced SBS modified bitumen cap sheet with cold-applied asphalt adhesive.

h. Adhere foil faced modified flashings at walls and curbs.

i. Install top sheet of flashing with an aluminum foil facer.

3.4 INSTALLATION OF ROOFING, GENERAL

A. Install roofing system according to roofing system manufacturer's written instructions, FM

Approvals' RoofNav listed roof assembly requirements, and FM Global Property Loss

Prevention Data Sheet 1-29.

B. Comply with roofing system manufacturer's written instructions.

C. Start installation of roofing in presence of manufacturer's technical personnel.

D. Coordinate installation of roofing system, so components of the roofing system not permanently exposed are not subjected to precipitation or left uncovered at the end of the workday or when rain is forecast.

1. Provide tie-offs at end of each day's work to cover exposed roofing sheets with a course of coated felt set in roofing cement with joints and edges sealed.

2. Complete terminations and base flashings, and provide temporary seals to prevent water from entering completed sections of roofing system.

3. Remove and discard temporary seals before beginning work on adjoining roofing.

E. Substrate-Joint Penetrations: Prevent roofing asphalt and adhesives from penetrating substrate joints, entering building, or damaging roofing system components or adjacent building construction.

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 11

3.5 INSTALLATION OF INSULATION OVER METAL DECKING

A. Install base layer of insulation with joints staggered not less than 24 inches in adjacent rows.

1. Locate end joints over crests of decking.

2. Trim insulation neatly to fit around penetrations and projections, and to fit tight to intersecting sloping roof decks.

3. Make joints between adjacent insulation boards not more than 1/4 inch in width.

4. Fill gaps exceeding 1/4 inch with insulation.

5. Cut and fit insulation within 1/4 inch of nailers, projections, and penetrations.

6. Mechanically attach base layer of insulation using mechanical fasteners specifically designed and sized for fastening specified board-type roof insulation to metal decks.

a. Fasten insulation according to requirements in FM Approvals' RoofNav for specified Windstorm Resistance Classification.

b. Fasten insulation to resist specified uplift pressure at corners, perimeter, and field of roof.

B. Install upper layers of insulation, with joints of each layer offset not less than 12 inches from previous layer of insulation.

1. Staggered end joints within each layer not less than 24 inches in adjacent rows.

2. Trim insulation neatly to fit around penetrations and projections, and to fit tight to intersecting sloping roof decks.

3. Make joints between adjacent insulation boards not more than 1/4 inch in width.

4. Trim insulation, so that water flow is unrestricted.

5. Fill gaps exceeding 1/4 inch with insulation.

6. Cut and fit insulation within 1/4 inch of nailers, projections, and penetrations.

7. Adhere each layer of insulation to substrate using adhesive according to FM Approvals'

RoofNav listed roof assembly requirements for specified Windstorm Resistance

Classification and FM Global Property Loss Prevention Data Sheet 1-29, as follows:

a. Set each layer of insulation in a solid mopping of hot roofing asphalt, applied within plus or minus 25 deg F of equiviscous temperature.

3.6 INSTALLATION OF COVER BOARDS

A. Install cover boards over insulation with long joints in continuous straight lines, with end joints staggered between rows. Offset joints of insulation below a minimum of 6 inches in each direction.

1. Trim cover board neatly to fit around penetrations and projections, and to fit tight to intersecting sloping roof decks.

2. Cut and fit cover board tight to nailers, projections, and penetrations.

3. Adhere cover board to substrate using adhesive according to FM Approvals' RoofNav listed roof assembly requirements for specified Windstorm Resistance Classification and

FM Global Property Loss Prevention Data Sheet 1-29, as follows:

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 12

a. Set cover board in a solid mopping of hot roofing asphalt, applied within plus or minus 25 deg F of equiviscous temperature.

3.7 INSTALLATION OF SBS-MODIFIED FIBERGLASS-MAT BASE SHEET

A. Before installing, unroll base sheet, cut into workable lengths, and allow to lie flat for a time period recommended by manufacturer for the ambient temperature.

B. Installation of SBS-Modified Fiberglass-Mat Base Sheet:

1. Install base sheet in hot asphalt according to roofing manufacturer's written instructions, starting at low point of roofing system.

2. Extend roofing sheets over and terminate above cants.

3. Install base sheet in a shingle fashion.

4. Install base sheet without wrinkles, tears, or air pockets.

5. Laps: Accurately align roofing sheets, without stretching, and maintain uniform side and end laps.

a. Lap side laps as recommended by roof membrane manufacturer but not less than 3 inches.

b. Lap end laps as recommended by roof membrane manufacturer but not less than 6 inches.

c. Stagger end laps not less than 18 inches.

d. Completely bond and seal laps, leaving no voids.

e. Roll laps with a 20-pound roller.

6. Repair tears and voids in laps and lapped seams not completely sealed.

7. Apply pressure to the body of the base sheet according to manufacturer's instructions, to remove air pockets and to result in complete adhesion of base sheet to substrate.

C. Install roofing base sheet stripping where metal flanges and edgings are set on roofing base sheet according to roofing system manufacturer's written instructions.

3.8 INSTALLATION OF SBS-MODIFIED BITUMINOUS CAP SHEET

A. Before installing, unroll cap sheet, cut into workable lengths, and allow to lie flat for a time period recommended by manufacturer for the ambient temperature at which cap sheet will be installed.

B. Install modified bituminous roofing cap sheet according to roofing manufacturer's written instructions, starting at low point of roofing system.

1. Extend cap sheet over and terminate above cants.

2. Install cap sheet in a shingle fashion.

3. Install cap sheet as follows:

a. Adhere to substrate in cold-applied adhesive.

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4. Install cap sheet without wrinkles or tears, and free from air pockets.

5. Install cap sheet so side and end laps shed water.

C. Laps: Accurately align roofing sheets, without stretching, and maintain uniform side and end laps.

1. Lap side laps as recommended by roof membrane manufacturer but not less than 3 inches.

2. Lap end laps as recommended by roof membrane manufacturer but not less than 12 inches.

3. Stagger end laps not less than 18 inches.

4. Heat weld laps, leaving no voids.

5. Roll laps with a 20-pound roller.

6. Repair tears and voids in laps and lapped seams not completely sealed.

D. Apply pressure to the body of the cap sheet according to manufacturer's instructions, to remove air pockets and to result in complete adhesion of base sheet to substrate.

3.9 INSTALLATION OF FOIL-SURFACED FLASHING AND STRIPPING

A. Install base flashing over cant strips and other sloping and vertical surfaces, at roof edges, and at penetrations through roof; secure to substrates according to roofing system manufacturer's written instructions and as follows:

1. Over Wood Sheathing: Mechanically attach asphalt-coated fiberglass mat base sheet to wood sheathing.

2. Over Concrete and CMU: Prime concrete and CMU substrates with asphalt primer if required by roofing system manufacturer.

3. Adhere backer sheet to asphalt-coated fiberglass mat base sheet in a uniform coating of cold-applied adhesive.

4. Adhere backer sheet over roofing membrane at cants in cold-applied adhesive.

5. Apply solvent-free adhesives for installation of metal-foil-surfaced flashing sheets.

B. Extend base flashing up walls or parapets a minimum of 8 inches above roofing membrane and

4 inches onto field of roofing membrane.

C. Mechanically fasten top of base flashing securely with continuous metal termination bar anchored into substrate at 6 inches o.c. minimum.

3.10 INSTALLATION OF FLUID APPLIED PMMA FLASHING AND STRIPPING

A. Using masking tape, mask the perimeter of the area to receive the flashing system.

1. Apply resin primer to substrates.

B. Pre-cut fleece sheet reinforcement to ensure a proper fit at transitions and corners prior to membrane application.

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 14

1. Apply an even base coat of flashing resin to prepared surfaces using a roller at the rate specified by the resin manufacturer.

2. Work the fleece into the wet, catalyzed resin.

3. Lap fleece layers a minimum of 2 inch and apply an additional coat of catalyzed resin between layers of overlapping fleece.

4. Apply an even top coat of catalyzed resin immediately following embedment of the fleece.

5. Ensure that the flashing resin is applied to extend beyond the fleece.

6. Remove the tape before the catalyzed resin cures.

C. Should work be interrupted for more than 12 hours or the surface of the cured resin becomes dirty or contaminated by the elements, wipe the surface to be lapped with new flashing resin using the specified cleaner/solvent.

1. Allow the surface to dry for a minimum 20 minutes and a maximum 60 minutes before continuing work.

3.11 FIELD QUALITY CONTROL

A. Manufacturer's Field Service: Engage a site representative qualified by roofing membrane manufacturer to inspect substrate conditions, surface preparation, membrane application, flashings, protection, and drainage components; and to furnish reports to Architect.

1. Minimum inspections include the following milestones:

a. Inspection of existing deck substrate immediately prior to installation of insulation.

b. Inspection of during installation of modified base sheet.

c. Inspection just prior to installation of modified cap sheet.

2. Submit written reports of observations during inspections, included problems identified, location of problem, and corrective steps taken.

B. Final Roof Inspection: Arrange for roofing system manufacturer's field service representative to inspect roofing installation on completion, in presence of Architect, and to prepare a written inspection report.

1. Notify Architect and Owner 48 hours in advance of date and time of inspection.

2. Submit copy of manufacturer's technical personnel’s written report of Final Inspection.

C. Repair or remove and replace components of roofing system where inspections indicate that they do not comply with specified requirements.

D. Roofing system will be considered defective if it does not pass tests and inspections.

E. Additional testing and inspecting, at Contractor's expense, will be performed to determine if replaced or additional work complies with specified requirements.

SBS MODIFIED BITUMINOUS MEMBRANE ROOFING 075216 - 15

3.12 PROTECTING AND CLEANING

A. Protect roofing system from damage and wear during remainder of construction period.

1. When remaining construction does not affect or endanger roofing, inspect roofing system for deterioration and damage, describing its nature and extent in a written report, with copies to Architect and Owner.

B. Correct deficiencies in or remove roofing system that does not comply with requirements, repair substrates, and repair or reinstall roofing system to a condition free of damage and deterioration at time of Substantial Completion and according to warranty requirements.

C. Clean overspray and spillage from adjacent construction using cleaning agents and procedures recommended by manufacturer of affected construction.

3.13 ATTACHMENTS

A. Reports: Refer to attached reports, immediately following this section, for Wind Uplift

Resistance Performance Requirements for each Roof Zone:

1. Report of Roof System Design Wind-load Analysis, Main Building Connector.

END OF SECTION 075216