ROOFING PROJECT MANUAL

SPECIFICATIONS

Ulster County DPW – The Trudy Center 50 Center Street, Ellenville, NY 12428

Pre-bid: ______________________________

Bid Due Date: _________________________________

THIS DOCUMENT MUST REMAIN INTACT - DO NOT DETACH

RFB-UC26-145C

ALTERATIONS & ASSOCIATED WORK - TRUDY RESNICK FARBER CENTER

SECTION 07400 – PRE-FORMED METAL PANELS AND ASSOCIATED WORK

PART I - GENERAL

1.01 RELATED DOCUMENTS/REQUIREMENTS

A. The attached are components of this section:

1. ULSTER COUNTY MUNICIPAL BIDDING REQUIREMENTS/BID FORM

2. PICTORIAL SUMMARY/SCOPE-OF-WORK

3. ENGINEERING SHEETS 1 thru 15

4. ATTACHMENT “A” – LOW-SLOPE ROOF REPLACEMENT - Pg. 15

1.02 SCOPE OF WORK

A. Furnish and install the specified pre-formed metal roof panel system and related components at the Trudy Resnick Farber Center, 50 Center Street, Ellenville, NY 12428.

B. Base Bid: Remove and properly dispose of the existing asphalt shingle roof system down to the wood deck. This includes shingles, fasteners, underlayment, fascia, and drip edge.

C. Alternate: Provide a separate cost for installation/deduct of 24 ga., steel in lieu of Base Bid of .040 aluminum panels.

D. Work under both base and alternate shall include:

1. Full-surface application of specified self-adhering SBS underlayment over the prepared substrate.

2. Installation of pre-fabricated ZIP-RIB roof panels.

3. New metal fascia, drip-edge trim, coupled with new gutter system as detailed.

4. Snow retention system as specified.

5. All related flashings, terminations, closures, and accessories required for a complete, weather-tight roof system.

6. Removal and replacement of low slope Roof Area “D”. Installation to include R=30, new KEE membrane, coupled with new fascia/gravel-stop. See Attachment “A” - See Page 15.

7. Existing soffit to remain in-place/as is.

1.03 QUALITY CONTROL

A. Contractor shall:

1. Be experienced in installation of factory-formed metal roof systems of similar scope/size. 5 years minimum.

2. Be acceptable by ULSTER COUNTY DPW and its’ representatives.

3. The specified metal roofing system consists of the materials required and to be installed under the following criteria.

• UL Listing; provide materials provided bear the Underwriters Laboratories (UL) marking / label on the packaging or containers indicating materials have been produced under UL classification and follow-up services. Required Rating; UL 90 Uplift Resistance

• FM Global Approval 4471

4. The roofing contractor shall maintain an adequate number of skilled workers who are thoroughly trained and experienced in the necessary crafts, and who are completely familiar with the specified requirements and methods necessary for the proper performance of the work. No allowance will be made for lack of skill on the part of the workers.

5. Any deviations from contract, drawings and/or specifications must be submitted in writing for approval prior to implementation to the design professional representing the owner and the MRSM for acceptance / approval by both parties.

6. Upon completion of the roof installation the roofing contractor shall arrange for a quality assurance / warranty inspection by the Technical Service Department of the specified manufacturer. Notice of the inspection date and time will be given to the owner / owner's representative at least 72 hours prior to the inspection taking place.

B. Project meetings:

1. Pre-Bid Conference:

a. Will be on: ______________________________________

b. Attendance:

1) ULSTER COUNTY DPW Representative(s)

2) Bidding Contractor(s)

3) Roofing Innovations, LLC

c. Agenda:

1) Review of specification.

2) Walkover inspection

2. Pre-construction conference:

a. Will be scheduled by ULSTER COUNTY DPW and its' representatives.

b. Attendance:

c. 1) ULSTER COUNTY DPW Representative(s)

2) Contractor's Representative

3) Roofing Innovations, LLC

d. Agenda:

1) Submittal of list of subcontractors, material submittal, and progress schedule.

3) Designation of responsible personnel and cell phone number(s).

4) Walkover inspection.

5) Work Safety Plan

3. Progress meetings:

a. Will be scheduled by ULSTER COUNTY DPW as required.

b. Attendance:

1) ULSTER COUNTY DPW Representative(s)

2) Contractor's Representative

3) Sub-contactor's, as appropriate.

c. Minimum agenda:

1) Review of work progress.

2) Field observations, problems, and decisions.

3) Effect of proposed changes on progress schedule and coordination.

4) Other business relating to work.

4. Final inspection:

a. Will be scheduled by ULSTER COUNTY DPW upon job completion.

b. Attendance:

1) Contractor/subcontractors as appropriate

2) Roof System Representative

c. Minimum agenda:

1) Walkover inspection.

2) Identification of problems which may impede Project Closeout and issuance of warranty.

C. Plans and specifications:

1. Contractor must notify ULSTER COUNTY DPW of any omissions, contradictions or conflicts five (5) days before bid date. ULSTER COUNTY DPW will provide necessary corrections or additions to plans and specifications by addendum. If contractor does not so notify ULSTER COUNTY DPW of any such condition, it will be assumed that the contractor has included the necessary items in the bid to complete this specification.

2. It is the intent that this be a completed project as far as the contract documents set forth. It is not the intent that different phases of work on this project be delegated to various trades and subcontractors by the contract documents. Contractor must make own contracts with various subcontractors, setting forth the work these subcontractors will be held responsible for. Contractor alone will be held responsible to ULSTER COUNTY DPW for the completion of this project.

3. It is the contractor's responsibility during the course of the work, to bring to the attention of the owner's representative any defective membrane, insulation or deck discovered where not previously identified.

1.05 REFERENCES

A. SMACNA - Sheet Metal and Air Conditioning Contractors National Association, Vienna, VA.

B. FM Global

C. UL - Underwriters Laboratories, Northbrook, IL.

D. ASTM - American Society for Testing and Materials, Philadelphia, PA.

1.06 SUBMITTALS

A. Submission of the items listed below, is required by ULSTER COUNTY DPW prior to commencement of project.

1. Product data:

a. Material safety data sheets for all specified products

b. Samples of each material specified, properly labeled.

c. Shop drawings or samples of specified metal flashings, showing exact profile, lengths, joints termination and methods of attachment.

1.07 DELIVERY, STORAGE AND HANDLING

A. Delivery of materials:

1. Deliver materials to job-site in new, dry, unopened, and well-marked containers showing product and manufacturer's name.

2. Deliver materials in sufficient quantity to allow continuity of work.

3. Coordinate delivery with ULSTER COUNTY DPW.

B. Do not order project materials or start work before receiving Contract as issued by Ulster County.

C. Storage of materials:

1. Store roll goods on sides only. Discard rolls which have been flattened, creased, or otherwise damaged. Place materials on pallets. Do not stack pallets.

2. No materials may be stored in open or in contact with ground or roof surface. Metal panels to be stored on the bias/with slope to shed water/avoid staining/discoloration.

3. Contractor shall assume full responsibility for the protection and safekeeping of products stored on premises.

D. Material handling:

1. Handle materials to avoid bending, tearing, or other damage during transportation and installation.

2. Material handling equipment shall be selected and operated so as not to damage existing construction or applied roofing. Do not operate or situate material handling equipment in locations that will hinder smooth flow of vehicular or pedestrian traffic.

1.08 SITE CONDITIONS

A. Field measurements and material quantities:

1. Applicator shall have SOLE responsibility for accuracy of all measurements, estimates of material quantities and sizes, and site conditions that will affect work.

B. Existing conditions:

1. Building space directly under roof area covered by this specification will be utilized by on-going operations. See General Conditions. Do not interrupt ULSTER COUNTY DPW's operations unless prior written approval is received from ULSTER COUNTY DPW.

2. Access to roof shall be from the outside only, via ladder.

3. If any units and other equipment require removal, or to be lifted to achieve a minimum height, they shall be carefully disconnected and removed to a protected area so as not to damage any part or component thereof, and shall be reconnected in such a way that they are restored to a prior work operating condition. Appropriate measures shall be taken to prevent dust, vapors, gases or odors from entering the building during roof removal, replacement or repair.

4. All disconnection and re-connection shall be performed by a mechanical/plumbing and/or electrical company licensed and approved by ULSTER COUNTY DPW to perform such work.

5. Coordination will be required between selected contractor and ULSTER COUNTY DPW to perform the above described work if needed

C. Safety requirements:

1. All application, material handling, and associated equipment shall conform to and be operated in conformance with OSHA safety requirements.

2. Advise ULSTER COUNTY DPW whenever work is expected to be hazardous to the facility, employees, and/or operators.

3. Maintain a crewman as a floor area guard whenever roof decking is being repaired or replaced.

4. Maintain fire extinguisher within easy access whenever power tools, and torches are being used.

D. Waste Disposal:

1. Do not re-use, re-cycle or dispose of material manufacturers product containers except in accordance with all applicable regulations.

E. Environmental requirements:

1. Do not work in rain, snow, or in presence of water.

2. Do not work in temperatures below 40F.

3. Do not install materials marked "keep from freezing" when daily temperatures are scheduled to fall below 40F.

4. Remove any work exposed to freezing.

5. Advise ULSTER COUNTY DPW when volatile materials are to be used near air ventilation intakes so that they can be shut down or blocked as owner requires.

F. Security requirements:

1. Comply with ULSTER COUNTY DPW security requirements.

2. Provide ULSTER COUNTY DPW with current list of accredited persons.

3. ALL MATERIALS/STAGING/LAYDOWN ARAES TO BE FENCED-

IN/PROVIDE SECURITY FENCING AROUND.

G. Temporary sanitary facilities:

1. Furnish, install, and maintain temporary sanitary facilities for employee use during project. Remove on project completion.

1.09 QUALITY ASSURANCE GUARANTEE

A. Guarantee:

1. Upon completing the project, the contractor shall provide a 3 year contractor's and 20 year Manufacture's Warranty to ULSTER COUNTY DPW.

B. Warranty:

1. The specified manufacturer shall provide the specified Twenty (20) Year

Warranty. The specified manufacturer's warranty to include labor and material coverage, with no-dollar-limit, against leakage of all specified components.

END-OF-SECTION

PART II – PRODUCTS

2.01 GENERAL

A. All materials shall comply with referenced standards and manufacturer’s recommendations.

B. Use products in accordance with safety data sheets and labeling.

2.02 BASIS OF DESIGN

A. The basis-of-design system is: ZIP-RIB by IMETCO (Innovative Metals Company, Inc.) Contact: Jason Curry – 716-380-2690/jcurry@imetco.com

B. All materials and accessories shall be from the same manufacturer unless otherwise approved in writing. Substitutions are not permitted unless expressly accepted by Ulster County and Roofing Innovations, LLC prior to bid.

2.03 METAL PANELS

A. Material: 0.040" aluminum alloy H25 per ASTM B209

B. Finish: Unpainted (mill finish)

C. Texture: Stucco embossed

D. Panel Width: 16 inches

E. Panel Seam: 2.5" vertical standing seam with factory-applied hot melt sealant

F. Forming: Site-formed using IMETCO-owned equipment operated by trained manufacturer personnel

G. Panels shall be continuous length from ridge to eave. No end laps unless required by design.

H. Panels shall include two intermediate stiffening beads and a concealed fastening system.

I. Panels must allow thermal movement and be field-seamed using a manufacturer-supplied seamer.

mailto:716-380-2690/jcurry@imetco.com

2.04 UNDERLAYMENT

A. Self-adhering SBS underlayment:

Aqua Block 50 by IMETCO, 50-mil thick, fiberglass-reinforced

• Meets ASTM D1970

• UV exposure tolerance: 90 days minimum

• Slip-resistant polyester top surface

B. All laps and seams installed per manufacturer instructions.

2.05 SEALANTS

A. Seam Sealant: Factory-applied, high-viscosity, hot melt sealant

B. Tape Sealant: Non-curing polyisobutylene, 1" wide x 1/16" thick

C. Exposed Sealant: Elastomeric sealant, ASTM C920 compliant

D. Concealed Sealant: Butyl-based, ASTM C1311

2.06 FASTENERS

A. Concealed Fasteners: Corrosion-resistant #10 screws, type appropriate to substrate

B. Exposed Fasteners: 300 series stainless steel with neoprene washers or stainless steel rivets

C. Anchor Clips:

• Two-piece sliding type

• 18-gauge galvanized base / 20-gauge stainless steel hook

• Maintains minimum 3/8" clearance from substrate to allow ventilation

2.07 ACCESSORIES

A. Ridge caps, trim, fascia, and closures must match panel material and finish

B. Gable trim to be shop-formed and fully welded with radius to match curved roof profile. Minimum 0.050" aluminum, 8" vertical face

C. Closures: Closed-cell polyethylene or rubber, cut to match panel profile

D. All accessories must be from or approved by the panel manufacturer

2.08 FABRICATION

A. All components to be factory-formed where possible

B. Sheet metal accessories to comply with SMACNA guidelines

C. Seams shall include factory-installed sealant

D. Flashing sections minimum 120" length, with sealed, riveted corners

E. Cleats, clips, and terminations formed to ensure watertight integrity

2.09 FINISHES

A. Metal finishes shall be uniform, with no significant variation in color or sheen

B. Painted components (if used) must use a 70% PVDF finish in accordance with AAMA

END-OF-SECTION

PART III – PREPARATION & EXECUTION

3.01 EXAMINATION

A. Examine substrates, framing, and site conditions with installer present.

B. Confirm:

• Roof deck is clean, dry, and sound

• Framing is properly aligned

• Substrate supports panel layout

• All penetrations are coordinated with seam layout

C. Report conditions that may affect installation. Do not proceed until such conditions are corrected.

3.02 PREPARATION

A. Clean roof deck of all debris, protrusions, and moisture-sensitive contaminants.

B. Verify field measurements and confirm panel lengths, transitions, and coverage with manufacturer’s guidance.

C. Establish control lines and flashing alignment before panel layout begins.

D. Set string lines at ridge, eaves, and gables to ensure true and square installation.

3.03 UNDERLAYMENT INSTALLATION

A. Install Aqua Block 50 self-adhering underlayment wrinkle-free in shingle fashion:

• Side laps: Minimum 3.5"

• End laps: Minimum 6", staggered

• Press laps with roller

• Cover entire roof area

• Cover underlayment within 90 days per manufacturer’s instructions

B. Coordinate underlayment with flashings to maintain watertight integrity.

3.04 PANEL INSTALLATION

A. Install ZIP-RIB panels per IMETCO shop drawings and published instructions.

B. Begin at one end and work across the roof.

C. Use specified anchor clips fastened over bearing plates to distribute load.

D. At ridge or head conditions:

• Use 3 pan fasteners to fix each panel

• Shim panel underside with 3/8" spacer to maintain flatness

• Hand-crimp initial seams to lock panel ends

• Permanently seam panels with electric seamer

• Seams must be reversible using IMETCO unseamer tool

E. Accommodate thermal expansion with manufacturer-approved clip spacing.

F. Avoid exposed fasteners except at permitted locations (e.g., trim).

G. Use manufacturer’s sealants at terminations and laps.

H. Coordinate with flashing installation to ensure continuous weatherproofing.

I. Panels shall be free of dents or damage. Minor oil-canning is acceptable and not grounds for rejection.

3.05 SHEET METAL AND FLASHING INSTALLATION

A. Install flashing, trim, and closures to SMACNA standards.

B. Seal all joints using butyl sealant or tape.

C. Conceal fasteners where possible. Touch up any visible fasteners with matching paint.

D. Flash penetrations and roof-mounted items per specified details.

3.06 TOLERANCES

A. Installation Tolerance:

• Deviation from line: ±1/4" in 20'

• Panel alignment offset: ≤1/8"

3.07 FIELD QUALITY CONTROL

A. Coordinate with IMETCO to provide three inspections by a manufacturer-authorized rep:

• During installation (progress inspection)

• After panel installation (final)

• Prior to warranty issuance

B. Remove and replace any work not meeting specifications.

3.08 CLEANING & COMPLETION

A. Remove strippable films and temporary protection once work is complete.

B. Clean panel surfaces per manufacturer’s guidance.

C. Replace damaged panels or components.

D. Leave roof in clean, watertight condition.

E. Submit warranty documents to owner at substantial completion.

END OF SPECIFICATION SECTION 07400

ATTACHMENT “A”

SECTION 07500 – LOW SLOPE ROOFING AND ASSOCIATED WORK

PART I - GENERAL

1.01 SCOPE OF WORK

A. Roof installation work to include the following:

a. Sweep clean/remove all debris from existing deck once removal(s) have been performed.

b. Mechanically attach the specified tapered polyisocyanurate insulation system to the existing steel deck in pattern specified.

c. Adhere ½” pre-primed gypsum recovery board to the newly installed insulation system in the specified low-rise foam adhesive in pattern specified.

d. Apply specified primer to the prepared substrate in preparation to receive the specified self-adhered temporary roof cover/Hybrid System. Allow to dry.

e. Install the specified self-adhering, SBS weatherproof membrane to the newly primed substrate. Completely roll-in as specified to ensure/promote positive adhesion. Probe/check all seams/laps/penetrations for overnight weatherproofing integrity.

f. Adhere specified, fleece-backed, KEE Membrane over newly installed insulation system in the specified splatter adhesive. All laps to be heat welded as specified.

g. Specified elastomeric flashings, termination details, copings and accessories.

1.09 QUALITY ASSURANCE GUARANTEE

A. Guarantee:

1. Upon completing the project, the contractor shall provide a 3 year contractor's and 20 year Manufacture's Warranty to ULSTER COUNTY DPW.

B. Warranty:

1. The specified manufacturer shall provide the specified Twenty (20) Year

Warranty. The specified manufacturer's warranty to include labor and material coverage, with no-dollar-limit, against leakage of all specified components.

INTENTIONALLY LEFT BLANK

PART II - PRODUCTS

2.01 GENERAL

A. Comply with all references, specifications, and manufacturer's data.

B. Use products with personal protection. User must read container label and material safety data sheets prior to use.

2.02 PRIMARY MANUFACTURER

A. Available Manufacturers: Subject to compliance with all required levels of performance as clearly defined in these specifications utilizing the specified ASTM test methods. Manufacturers offering products that may be incorporated into the work include, but are not limited to, the following:

Basis of Design: Flex Membranes, 5103A Pottsville Pike, Reading, PA 19605.

610.916.9500 – John Doyle

2.02 PRIMARY PRODUCTS

1. KEE/Fleece-Backed Membrane:

FLEX FB 60/Elvaloy KEE Membrane as manufactured by Flex Membranes, 5103A Pottsville Pike, Reading, PA 19605

COLOR: WHITE

2. KEE Membrane Adhesive:

FLEX CR-20 (Splatter Pattern Only) Flex Membranes, 5103A Pottsville Pike, Reading, PA 19605

3. Low VOC Flashing Adhesive: (for base flashings/non FB) FLEX Bonding Adhesive, Flex Membranes, 5103A Pottsville Pike, Reading, PA 19605

4. Polyisocyanurate Board Insulation System:

a. Hunter/FiberTite FTR-Value

b. Slope Requirement: 1/8” : 12”

c. R-Value = 33

d. Size: 4’ x 4’

e. See attached layout/roof plan

6. SBS, Self-Adhering Membrane/Hybrid Roof:

Self-Adhering Vapor Barrier by Flex Membranes, 5103A Pottsville Pike, Reading, PA 19605

7. SBS, Self-Adhering Vapor Barrier Primer:

Seld Adhering Primer by Flex Membranes, 5103A Pottsville Pike, Reading, PA 19605

9. Mechanical Fasteners/Attachment for ISO Insulation; #12 self-tapping, corrosion resistant screws and 3” metal Plates by Primer by Flex Membranes, 5103A Pottsville Pike, Reading, PA 19605

10. 1/2” Glass Mat Reinforced Gypsum Board:

Flex Membranes, 5103A Pottsville Pike, Reading, PA 19605

12. Gypsum Coverboard Adhesive: FLEX CR-20 (Splatter Pattern Only) Flex Membranes, 5103A Pottsville Pike, Reading, PA 19605

2.03 AUXILIARY ROOFING MATERIALS

A. General Sealant: (pitch pan sealant/water cut-off/general caulking)

1. Polyurethane Sealant:

a. Flex Sealant by Flex Membranes, 5103A Pottsville Pike, Reading, PA 19605

C. Pre-molded Flashings: Injection molded vent stack, split Wrapid Flash and inside and outside corner flashing using KEE compound.

D. Non-Reinforced Membrane: Field fabrication membrane, 60 mil (1.5 mm) non-reinforced vinyl membrane.

E. T Joint Covers: Pre-cut 4 x 4 inch, 60 mil, non-reinforced membrane to reinforce areas where three overlapping sheets of membrane intersect.

F. Wood Nailers: No. 2 or better construction grade lumber.

o Creosote or asphaltic type preservatives are not acceptable.

o Top Nailer Thickness; 1.5 inches minimum.

2.04 METAL FLASHINGS

1. Coated metal (“drip-edge”) to be supplied by primary materials manufacturer.

Type: 24 Ga. Coated Steel – hot-air welded to the membrane so as not to buck water. COLOR; match newly installed standing seam metal roof.

2. FLEX Termination Bar: Membrane flashings restraint and termination seals.

0.125 x 1 x 120 inch (3 x 25 x 3048 mm) 6060-T5 extruded aluminum bar with pre-punched slots, 8 inches (203 mm) on center.

2.05 SYSTEM PERFORMANCE REQUIREMENTS:

A. Fleece-Backed, KEE Membrane;

FLEX FB 60 Elvaloy;

Property Typical Value Test Method Breaking Strength 325 lbf x 324 lbf ASTM D-751 Elongation @ Break 50% x 42% ASTM D-751 Tear Strength 89 lbf x 109 lbf ASTM D-751 Low Temperature Bend ASTM D-751 Retention of properties after heat aging (176˚F/56 days)

90% ASTM D 3045

Low Temperature Bend after heat aging

-30˚F ASTM D-751

Factory Seam Strength > Fabric Break ASTM D-751 UL Fire Rating Class A UL 790/Pass Hydrostatic Resistance 800psi ASTM D-751 Tensile Strength PASS ASTM D-751 Puncture Resistance PASS ASTM D-751 Accelerated Weathering PASS ASTM D-751 Dynamic Puncture Resistance

PASS ASTM D-751

Factory Seam strength >Fabric Break ASTM D 751-15

SRI 109 (WHITE) ASTM E 1980

Emissivity .91 ASTM D-751 Thickness .060” (membrane) ASTM D 751

B. Bonding Adhesive; (Flashing Only) FLEX Flashing Adhesive;

Property Typical Value Test Method Viscosity 2,300+/- cps ASTM D 751 Coverage 90 ft²/gal. ASTM D 751

V.O.C. 234 g/l ASTM D 751 Solids by Weight 45.0%+/- ASTM D 751 Wt. per Gallon 7.4 lb. ASTM D 751 Shelf Life 1 Year ASTM D 751 Color Amber ASTM D 751

C. Self Adhered Membrane/Hybrid System FLEX SA Membrane

Property Typical Value Test Method Tear Strength 95 (lbs) (MD)

103 (lbs) XMD

ASTM D-1970

Elongation @ Break (73°f) 33% (MD)

25% (XMD)

ASTM D-1547

Peak Load @ 73°F 54 lb/in (MD) ASTM D 5147 74 lb/in (XMD)

Low Temp. Flex -58°F ASTM D 5147 Dimensional Stability 0.1% ASTM D 5147 Water Vapor Permeance 0.06 perm ASTM E 96 Thickness 31 mils ASTM D 5147

D. Gypsum Coverboard Securock©

Property Typical Value Test Method Thickness 1/2” ASTM C 473 Width Standard 4’ ASTM C 473 Width Length 4’ ASTM C 473 Water Absortion 10% Max ASTM C 473 Compressive Strength 900psi ASTM C 473 Flame Spread <2.0 ASTM C 473 Bending Radius 5’ ASTM C 473

PART III - EXECUTION

3.01 EXAMINATION

A. Verify conditions as satisfactory to receive work.

B. Do not begin roofing until all unsatisfactory conditions are corrected. Beginning work constitutes acceptance of conditions.

C. Check projections, curbs, and deck for inadequate anchorage, foreign material, moisture, or unevenness that would prevent quality and execution of new roofing system.

3.02 GENERAL WORKMANSHIP

A. All work performed by Contractor shall conform to this specification.

B. The presence and activity of the Technical Services Representative, and/or ULSTER COUNTY DPW, shall in no way relieve Contractor of contract responsibilities or duties.

C. Substrate: Free of foreign particles prior to laying new roof membrane.

D. Traffic and equipment: Kept to a minimum – any “scuff” marks to be removed/cleaned to ensure an aesthetically pleasing project

E. Wrapper and packaging materials: Not to be included in roofing system.

F. Entrapped debris/bond-breakers: Not permitted within new membrane. Its discovery is sufficient cause for rejection.

3.03 PREPARATION

A. Protection:

1. Contractor shall be responsible for protection of property during course of work. Lawns, shrubbery, paved areas, and building shall be protected from damage. Repair damage at no extra cost to ULSTER COUNTY DPW.

2. Provide at site prior to commencing removal of debris, a dumpster or dump truck (if needed) to be located adjacent to building where directed by ULSTER COUNTY DPW representative.

3. Roofing, flashings, membrane repairs, and insulation shall be installed and sealed in a watertight manner on same day of installation or before arrival of inclement weather.

4. Preparation work shall be limited to those areas that can be covered with installed roofing material on same day and before arrival of inclement weather.

6. Arrange work sequence to avoid use of newly constructed roofing for storage, walking surface, and equipment movement. Move equipment and ground storage areas as work progresses.

7. At end of each working day, seal removal areas with water stops along edges to prevent water entry.

8. Contractor to plan/coordinate and layout project install to ensure water flows over new roof insulation/membrane during the progress of this project and does not infiltrate the newly installed roof system.

B. Surface preparation:

1. Tear-off and remove all existing roof membrane, insulation and all associated termination details down to the existing deck and/or substrate.

2. Sweep clean/remove any debris prior to installing the mechanically attached insulation. Ensure substrate is dry prior to installing the specified base sheet & vapor barrier

3.06 THERMAL INSULATION ATTACHMENT

1. Mechanically attach the specified tapered insulation systeme insulation as an assembly at a rate of one (1) fastener every (4) square feet. Increase perimeter by 50% and corners by 75%. See Detail Sheet S-2 for pattern/layout.

2. Adhere the specified ½’ gypsum coverboard over newly installed layer(s) of mechanically attached polyisocyanurate insulation utilizing the specified low-rise foam adhesive. Stagger all joints end-to-end/side-to-side.

3. Immediately after placement, walk insulation boards into adhesive to achieve solid bond.

4. NOTE; WEIGH DOWN ALL LAYER(S) OF INSULATION AS NECESSARY

TO ENSURE POSITIVE CONTACT TO MINIMIZE ANY “POPPED”

BOARD(S). POPPED BOARDS ARE REASON FOR REJECTION.

3.07 S/A MEMBRANE ATTACHMENT (installed directly below the specified fleece-backed roof cover)

1. Apply the specified Elastocol Stick Primer to the newly installed Gypsum coverboard. Allow to dry.

2. Install the specified self-adhering membrane/temporary roof cover.

Completely roll-in with plastic lawn roller to ensure positive contact to the steel substrate. Inspect/probe all seams/laps to ensure the weatherproofng integrity of the newly installed membrane.

3. Ensure all curb height(s) are a minimum 8” in height above the finished roof height. Any disconnect/re-connects to be coordinated with ASCA.

3.08 ROOF SYSTEM APPLICATION

A. Fully adhere the specified membrane to the newly installed tapered insulation system with the specified PolySet CR-20 Spatter Adhesive applied at a rate of 20- 25 squares per “A” + “B” kit.

B. The roof surface must be clean, dry and free of foreign material. It is required that the ambient air temperature is above 45°F for the use of cold adhesives.

C. Position sheets prior to applying the specified adhesive. Measure and chalk lines on the substrate to establish proper alignment of the sheet.

D. Place the roll on the line and unroll the rolled-good its entire length and allow the membrane to relax. The relaxation time required is dependent on the ambient air temperature.

E. Fold one end of the fleece-backed membrane sheet on top of itself until both ends meet. Apply the specified CR-20 Splatter Adhesive applied at a rate of 20-25 squares per “A” + “B” kit to the prepared roof surface. The sheet can then be pulled and laid into the bonding material using care not to create any wrinkles.

F. Carefully push and broom into place from fold line to overlap, avoiding wrinkles and air pockets. Roll with a heavy roll (minimum 60 lbs.) to insure proper adhesion.

G. Repeat procedure for other half of the sheet.

H. Lap seams shall be done by lapping the 3” selvedge edge over the non selvedge edge of the previous roll. Do not allow adhesives or other contaminants to the lapped seam. The selvedge edge seam will be completed by the hot air welding method. Seams are to be completed each day during construction.

I. All seams must be checked with a needle probe (daily) and any voids repaired with the heat gun the same day they are made.

A. Seam Welding

1. All Seams must be clean and dry prior to proceeding with the hot air welding procedure. The seams may be cleaned using a clean cotton rag dampened with a mild solvent such as acetone or MEK. Do not use Denim or Synthetic rags for cleaning. Allow the seams to thoroughly dry after cleaning.

2. All seams greater than 10’ in length should be welded with an automatic type welding unit. Hand held welders are used for the remaining seams and all detail welding.

3. A properly welded seam should be a solid weld approximately 1 1/2” wide.

4. Contaminated areas within a seam will inhibit proper welding and will require a membrane patch

B. T-Joint Cover Installation:

1. Install T-Joint Covers, centered and aligned so edges are parallel to roof system seams.

2. The T-Joint Cover shall be 100 percent welded.

C. Inspections

1. All seams are to be completed by the hot air welding method each day as the installation progresses.

2. The roofing contractor is to designate a responsible person to inspect the completed installation each day as the installation progresses. The inspection is to include hand probing of all welded seams.

3. Any defects found during these inspections should be immediately corrected.

General Comments/Welding Requirements;

1. Hand Welding

a. The lap or seam area of the membrane should be intermittently tack welded to hold the membrane in place.

b. The back "interior" edge of the membrane shall be welded first, with a thin, continuous weld to concentrate heat along the exterior edge of the lap during the final welding pass.

c. The nozzle of the hand held hot air welder shall be inserted into the lap at a 45° angle to the lap. Once the polymer on the material begins to flow, a hand roller shall be use to apply pressure at a right angle to the tip of the hand welder. Properly welded seams shall utilize a 1-1/2 inch wide nozzle, to create a homogeneous weld, a minimum of 1-1/2 inches in width.

d. Smaller nozzles may be used for corners, and other field detailing, maintaining a minimum 1 inch weld.

2. Automatic Machine Welding

a. Proper welding of the membrane can be achieved with a variety of automatic welding equipment.

b. Follow all manufacturers’ instructions for the safe operation of the automatic welder.

c. Follow local code requirements for electric supply, grounding and surge protection.

d. The use of a dedicated, portable generator is highly recommended to ensure a consistent electrical supply, without fluctuations that can interfere with weld consistency.

e. Properly welded seams shall utilize a 1-1/2 inch wide nozzle, to create a homogeneous weld, a minimum of 1-1/2 inches in width.

3. Inspection

a. The job foreman and/or supervisor shall initiate daily inspections of all completed work which shall include, but is not limited to the probing of all field welding with a dull pointed instrument to assure the quality of the application and ensure that any equipment or operator deficiencies are immediately resolved.

b. Ensure that all aspects of the installation (sheet layout, attachment, welding, flashing details, etc.) are in strict accordance with the most current FiberTite Roofing Systems Specifications and Details.

c. Excessive patching of field seams because of inexperienced or poor workmanship will not be accepted at time of FINAL INSPECTION FOR

WARRANTY ACCEPTANCE.

d. Any deviation from pre-approved specifications and/or details requires written authorization from the manufacturer prior to application to avoid any warranty disqualification.

e. It is the contractor, job foreman, and supervisor and/or quality control personnel to perform a final “self” inspection on all seams prior to requesting the inspection for warranty issuance by the manufacturer.

3.10 GENERAL FLASHING REQUIREMENTS

A. Clean all vents, pipes, conduits, tubes, walls, and stacks to bare metal. All protrusions must be properly secured to the roof deck with approved fasteners.

Flash all penetrations according to approved details.

B. Flash all curbs, parapets and interior walls in strict accordance with approved details.

C. All flashing shall be adhered to properly prepared, approved substrate(s) with either bonding adhesive applied in sufficient quantity to ensure total adhesion.

D. The base flange of all membrane flashing shall extend out on to the plane of the deck, beyond the wood nailers to a maximum width of 8 inches.

E. Vertical flashing shall be terminated above the plane of the deck with approved termination bar and counter-flashing or metal cap flashing.

F. Complete all inside and outside corner flashing details with pre-formed corners or an approved field fabrication detail.

G. Probe all seams with a dull, pointed probe to ensure the weld has created a homogeneous bond.

H. Install penetration accessories in strict accordance with approved details. Ensure penetration accessories have not impeded in any way the working specification.

3.11 AT DIFFICULT/ODD SHAPED PENETRATION/FLASHING(S)

A. Remove any dirt/debris. Clean soiled membrane with a light detergent if necessary.

Allow to dry.

B. Clean membrane with seam cleaner and a green scratch pad to lightly abrade the surface.

C. Mask membrane a minimum of 6” beyond the base of the transition/vertical wall/substrate in preparation to receive liquid-applied membrane.

D. Apply catalyzed ALSAN resin base layer (appx. 50 mils wet) to the prepared substrate and base of the window frame.

E. Completely embed polyester reinforcing fleece into newly applied resin base layer.

Allow to cure overnight.

F. Apply top-coat of catalyzed ALSAN resin (appx. 25 mils wet) to the newly installed base layer to completely cover the reinforced base.

G. Remove masking tape prior to curing.

3.12 METAL FLASHING

A. All perimeter parapet wall/wall/edge details and slip flashing at units/curbs, are to be installed as shown on the attached details.

B. Ensure all fascia/slip flashing extend a minimum of 3 inches lower than the top-edge of the base flashing/termination.

3.13 DAILY WATERSTOP/TE-INS

A. Install "deadman" insulation filler at insulation staggers.

B. Extend roofing system at least 24 inches onto prepared area of adjacent roofing.

C. At beginning of next day's work remove temporary connection by cutting felts evenly along edge of existing roof system. Remove "deadman" insulation fillers.

3.14 CLEANING

A. All work areas are to be kept clean, clear and free of debris at all times.

B. Do not allow trash, waste or debris to collect on the roof. These items shall be removed from the roof on a daily basis.

C. Dispose of or recycle all trash and excess material in a manner conforming to current EPA regulations and local laws.

D. Upon completion clean the installed products in accordance with the manufacturer’s instructions prior to owner’s acceptance.

E. Clean and unclog all gutters, scuppers, leaders and downspouts.

F. Clean and restore all damaged surfaces to their original condition.

END-OF-SECTION 07500