Bus Barn.pdf

Alan Stevens Associates, Inc. 1

REROOFING PROJECT MANUAL

INCLUDING SPECIFICATIONS AND DRAWINGS FOR:

PROJECT: Beaverton Schools Bus Barn

(Main & Lower)

3384 South M-18

Beaverton, MI 48612

CONSULTANT:

4200 C Street SW, Suite 2A

Cedar Rapids, IA 52404

319/390-0419 phone

319/390-0422 fax

THIS SPECIFICATION DOCUMENT IS DESIGNED FOR THIS PROJECT SPECIFICALLY AND IS

INTENDED TO BE USED FOR THIS PROJECT ONLY. UNAUTHORIZED USE OF THIS DOCUMENT FOR

ANY OTHER PROJECT IS PROHIBITED.

DATE SUBMITTED: 9/18/2025 COPY NUMBER: 1

Alan Stevens Associates, Inc.

TABLE OF CONTENTS

Bidding Requirements

Bid Form

Construction Forms

Pre-Construction Damage Report

Contractor’s Warranty

Specifications

DIVISION 01000 – GENERAL REQUIREMENTS

Section

01010 Summary of Work

10750 Warranties

DIVISION 02000 – SITEWORK

02070 Roof Demolition

DIVISION 06000 – WOOD AND PLASTICS

06100 Rough Carpentry

06150 Wood Deck Replacement

DIVISION 07000 – GENERAL REQUIREMENTS

07240 Roof and Deck Insulation

07553 Fully Adhered EPDM Elastic Sheet Roofing

70620 Roof Related Sheet Metal

07920 Sealants and Caulking

Alan Stevens Associates, Inc. 3

BID FORM

Name of Bidder: Date:

Pursuant to and in compliance with the Invitation to Bid and the proposed contract documents relating to the roofing project including Addendum No.(s) of:

Project: Beaverton Schools Bus Barn (Main & Lower) 3384 South M-18 Beaverton, MI 48612

The undersigned, having become thoroughly familiar with the terms and conditions of the proposed contract documents and with local conditions affecting the performance and cost of the work at the place where the work is to be completed and having fully inspected the site in all particulars, hereby proposes and agrees to fully perform the work within the time stated in strict accordance with the proposed contract documents. This bid shall include furnishing any and all labor, materials, services and equipment to do all the work required to complete said work in accordance with the specifications for the following sum:

A. Base Bid

To perform all work utilizing a fully adhered EPDM roof system as specified for the lump sum of:

1. Dollars

( $ ) (Manufacturer )

B. Unit Pricing

The following unit costs are provided in addition to the Bid for unforeseen conditions.

1. Remove and replace wood nailers other than what is specified.

( $ ) Per Board Foot

2. Remove existing deteriorated wood deck and replace with new to match existing.

( $ ) Per Square Foot

3. Provide the additional to replace missing and damaged fascia and soffit

( $ ) Total Additional Cost – Base Bid

BID FORM

Alan Stevens Associates, Inc. 4

C. Construction Time

The bidder agrees to start work as specified within calendar days from the execution of the contract, subject to the provisions of the contract and specifications, and the bidder agrees to complete all work as specified within calendar days of actually starting the construction.

D. Sub-Contractors

The bidder shall list all subcontractors who may be included in the arrival of these bids for the Owner’s review and acceptance. The Owner shall have the right to reject these bids if subcontractor does not meet their approval.

Subcontractor Trade

E. Acknowledgement

By submission of this bid, contractor acknowledges careful examination of the specifications and site conditions, both surface and concealed, for obtaining proper information to arrive at these prices.

Bidder acknowledges and agrees that this bid cannot be withdrawn within ninety (90) days without the consent of the Owner and that the Owner has the right to accept or reject any or all bids.

Contractor's License Number:

Legal Name of Firm or Corporation:

Address of Company:

Signature of Bidder:

Date Bid Submitted:

Alan Stevens Associates, Inc. 5

PRE-CONSTRUCTION DAMAGE REPORT

Project:

Address:

Facility Contact: Phone:

Contractor: Phone:

Anticipated Construction Start Date:

Upon inspection of the above-mentioned premises, we are in agreement that existing visible damage to the facility consists of the following: (List item description, quantity, location, extent of damage; include photographs if appropriate; use a second page of this form if additional space is required).

Interior:

Exterior:

Drains:

Mechanical:

The above-mentioned items should be excluded from any future claims for damages related to reroofing.

Date Contractor’s Representative

Date Facility Representative

Alan Stevens Associates, Inc. 6

CONTRACTOR WARRANTY

Contractor

Manufacturer and System Installed

Contract Number and Date

Project and Location

Area of Roof Installation

Date of Substantial Completion

(Effective Warranty Date)

Contractor warrants to Owner, that the roofing system identified above has been installed in accordance with the specifications of the contract, referenced above and the specifications of the manufacturer of the roofing system. Contractor further warrants to Owner that, subject to the terms, conditions and limitations stated herein, that Contractor, for a period of five (5) years, commencing with the date of substantial completion of the installation, will repair any leaks in the membrane installed, which are the direct result of defects in workmanship of the Contractor.

Contractor agrees to inspect and make necessary repairs to defects or leaks in the roofing system. Emergency leaks will be attended to within twenty-four (24) hours from receipt of notice from Owner or Owners Representative.

This warranty shall be subject to the same exclusions as those contained in the warranty of the roofing system manufacturer, pertaining to notice of leaks or defects; damage by natural disasters or structural failures; acts of negligence, accident or misuse, (except those of Contractor).

Contractor’s liability hereunder shall be limited to the repair or necessary replacement of the roof membrane without cost to Owner and shall not include incidental or consequential damages. This warranty shall be the sole and exclusive remedy of Owner respecting Contractor and no other warranty express or implied by Contractor.

Contractor:

By:

(Officer)

Title:

Company:

Telephone:

Date Executed:

SECTION 01010

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SUMMARY OF WORK

This section is for the convenience of the Contractor only and should not be construed as a complete accounting of all work to be performed.

The extent of the Scope of work is indicated on the drawings and by the requirements of each section.

DEMOLITION AND ROOF PREPARATION

Remove debris from roof area and properly dispose of all materials off site.

Tear off existing roof system down to the existing deck.

Tear off all base flashings.

Remove existing edge metal.

Remove existing gutters & downspouts.

Remove existing flue pipe flashing, storm collar, and rain cap.

Remove existing rusted flue pipe to first joint below the deck and replace with new to match existing size and type.

Remove existing deteriorated decking. (Unit Cost)

DECK REPAIR/REPLACEMENT

Install new decking to match existing deck. (Unit Cost)

ROUGH CARPENTRY

Install new nailers to replace damaged or deteriorated nailers (Unit Cost).

INSULATION/FASTENERS

Install .25” cover board mechanically fastened to the deck.

MEMBRANE/FLASHINGS

Install non-reinforced EPDM fully adhered system.

Install non-reinforced EPDM membrane fully adhered at all perimeters and projections.

Install uncured EPDM flashing membrane at all corners, angle changes, and T-intersections as required by manufacturer.

ROOF RELATED SHEET METAL

Install new counterflashing at all vertical and horizontal flashing terminations.

Install new edge metal.

Install new gutters and downspouts.

Install new formed metal flashing, storm collar, and rain cap at flue pipes.

Replace missing or damaged fascia and soffit. (Unit Cost)

SECTION 01750

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WARRANTIES

Part One - GENERAL

1.1. Description

Upon completion of work and prior to final payment, the following items are to be submitted to the Owner’s Representative as part of this section.

A. Manufacturer’s 20-year NDL labor and material warranty to Owner within 30 days from date of completion.

B. Contractor’s 5-year labor warranty to the Owner provided on the form within the Construction Forms section of this specification within 30 days from date of completion and prior to final payment.

- END OF SECTION -

SECTION 02070

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ROOF DEMOLITION

A. Provide all labor, material, equipment and tools to prepare the existing roofing system for reroofing as specified.

B. Provide for the proper disposal of all existing materials designated in the specifications or on the drawings to be removed. If asbestos is present, provide proper protection, monitoring and disposal during the removal process.

C. Related Work Described Elsewhere

i. Summary of work – Section 01010

1.2. Scheduling

Coordinate the roof preparation work with the new roofing work in such a manner as to keep the new insulation and roofing materials, building, and building interior absolutely dry and watertight.

Coordinate all work with the Owner to minimize any disruptions of the Owner’s operations.

1.3. Disposal

A. All debris shall be stored in containers approved by the Owner’s Representative.

B. Keep Owner’s property clean of any construction debris.

C. If asbestos is present and is to be removed, Contractor is to be responsible for all required abatement procedures including, but not necessarily limited to, appropriate notifications to authorities, all air monitoring, protection of workers and public, documentation of removal and disposal, submittal of all forms to Owner and authorities, and disposal. Contractor must show proof of licensing for asbestos abatement work prior to starting.

Part Two - PRODUCTS

(No products required in this section)

ROOF DEMOLITION SECTION 02070

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Part Three - EXECUTION

3.1. Protection of Surfaces

A. Contractor shall take all precautions during roof preparation to protect the building and adjacent surfaces from being soiled or damaged.

B. Contractor shall restore to original condition any damage caused during work performed in this section.

C. Keep roof surface clean of any debris that might prevent proper drainage.

D. At start of each workday, drains located within daily work area shall be temporarily plugged to prevent debris from falling into the drain. Plugs to be removed at end of each workday.

E. Contractor is responsible to protect the interior of the building from all falling debris, and/or liquid applied products. Normal dust fall-out is not included. In the event of deck repair, deck removal/replacement and/or obsolete curb/penetration removal, where the existing deck is open or will be opened to complete such work, contractor is required to install adequate interior protection to guard against falling debris.

Contractor shall schedule with the owner a time suitable to the owner to install interior protection. Failure to install adequate interior protection, resulting in interior damage, and loss of production, and/or product, contractor is responsible to reimburse the owner to cover all damages/losses. This cost may be deducted from the contract amount owed to the contractor. Contractor is responsible to remove all interior protection as soon as there is no threat of possible debris entering the building.

3.2. Disposal

A. Properly dispose of all debris from roof preparation on a daily basis.

B. Do not store debris on roof. Contractor shall take care not to overstress roof deck.

3.3. Preparation of Surfaces

A. The extent of preparation of surfaces is listed in each section and on the drawings.

(Refer to Section 01010 – Summary of Work)

3.4. Cleanup

A. Prior to the completion of the work, remove from the job site all tools, equipment, debris and waste.

B. Conduct final cleaning as per Section 1200.

SECTION 06100

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ROUGH CARPENTRY

A. Install all wood nailers, blocking, siding and plywood as required or indicated on the drawings.

1.2. Quality Assurance

A. Qualifications of Workmen: Provide sufficient workmen and supervisors who shall be present at all times during execution of this portion of the work and who shall be thoroughly familiar with the type of construction involved and the materials and techniques specified.

B. Rejections: In the acceptance or rejection of rough carpentry, the Owner will make no allowance for lack of skill on the part of the workmen.

1.3. Product Handling

A. Protection:

i. Store all materials up, off of the roof deck or ground, and cover with a weatherproof covering anchored sufficiently so as to resist wind blow-off.

ii. Keep all materials clearly identified with all grade marks legible. Keep all damaged material clearly identified as damaged and stored separately to prevent its inadvertent use.

iii. Do not allow installation of damaged or otherwise non-complying material.

B. Replacement: In the event of damage, immediately make all necessary repairs and replacements to the approval of and at no additional cost to the Owner.

2.1. Nailers

A. Exterior grade fire-retardant-treated (FRT) wood nailers to have UL label meeting ASTM E84 and ASTM D2898.

B. Treated wood nailers are to be #2, or better, with copper azole or alkaline copper quaternary preservatives.

C. Non-treated wood nailers to be #2 or better.

ROUGH CARPENTRY SECTION 06100

Alan Stevens Associates, Inc. 06100 - 12

D. Size to be as indicated on the drawings or as required for proper detail height.

Minimum size to be 1” x 4”.

2.2. Plywood

A. All plywood is to be a minimum ½”, exterior type, C-D, and a minimum of 4 plies.

Agency graded.

2.3. Fasteners

A. All fasteners must be stainless steel meeting factory mutual requirements.

B. Threaded Masonry/Concrete Fasteners

i. Stainless steel, threaded fastener with a low-profile head.

ii. Stainless steel, factory-made plate.

iii. Fastener to be Factory Mutual approved.

C. Steel/Wood Fasteners

i. Stainless steel, self-tapping, self-drilling screw with low profile head.

ii. Screw and plate type fastener to be Factory Mutual approved.

iii. Fasteners to be nominal ¼” thickness minimum and be of sufficient length to penetrate into steel ½” and wood 1”.

3.1. Nailers

A. Nailer type (FRT, pressure treated, or non-treated) as required to meet local building code requirements.

B. Nailers are to be installed as per detailed drawings or as necessary to meet roof system requirements.

C. Nailers shall be anchored to resist a pull of 175 lbs./foot in any direction.

D. Fasteners to be spaced a maximum of 24” O.C. for nailers with a minimum thickness of 2” nominal and 12” O.C. for all nailers less than 2” nominal thickness.

ROUGH CARPENTRY SECTION 06100

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3.2. Plywood

A. Plywood joints must be true and well-fitting allowing for expansion and contraction.

B. Plywood fasteners are to be a maximum grid pattern of 24” O.C.

3.3. Cleanup

A. After installation of all rough carpentry, Contractor is to remove all construction debris and equipment from job site.

SECTION 06150

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WOOD DECK REPAIR/REPLACEMENT

A. Work includes, but is not necessarily limited to, removing existing deteriorated wood decking and replacing with new decking.

B. Contractor is responsible to protect the interior of the building from all falling dust, debris, and/or liquid applied products. In the event of deck repair, deck removal/replacement and/or obsolete curb/penetration removal, where the existing deck is open or will be opened to complete such work, contractor is required to install adequate interior protection to guard against falling debris/dust.

Contractor shall schedule with the owner a time suitable to the owner to install interior protection. Failure to install adequate interior protection, resulting in interior damage, and loss of production, and/or product, contractor is responsible to reimburse the owner to cover all damages/losses. This cost may be deducted from the contract amount owed to the contractor. Contractor is responsible to remove all interior protection as soon as there is no threat of possible dust or debris entering the building.

A. Qualifications of Workers: Provide sufficient workers and supervisors who shall be present at all times during execution of this portion of the work and who shall be thoroughly familiar with the type of construction involved and the materials and techniques specified.

B. Rejections: In the acceptance or rejection of the work, the Owner will make no allowance for lack of skill on the part of the workers.

A. Store all materials off the roof deck or ground and covered with a waterproof covering ventilated to avoid condensation and sufficiently anchored to resist wind blow-off.

B. Keep all materials clearly identified with all identifying marks legible. Keep all damaged material clearly identified as damaged and stored separately to prevent its inadvertent use.

C. Do not allow installation of damaged or otherwise non-complying material.

D. In the event of damage, immediately make all necessary repairs and replacements subject to the approval of and at no additional cost to the Owner.

WOOD DECK REPAIR/REPLACEMENT SECTION 06150

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2.1. Wood Decking

A. Wood decking shall be Douglas Fir, standard stress grade 1200 psi, unless otherwise shown on the plans. Material shall be nominal 2 inch, S4S as shown on the plans. Decking shall be side T and G, end matched T and G or end grooved for splines.

B. Splines shall be 20-gauge galvanized iron with a minimum width of 1-1/2 inches.

C. Nails shall be common or box, 20d for 2-inch decking, 40d for 3-inch decking and

60d for 4-inch decking.

2.2. Plywood Decking

A. Plywood decking shall be APA rated sheathing, Exposure 1. Thickness shall match existing.

B. Nails shall be common, 6d for up to ½” plywood, 8d for ½” to 1” plywood, and 10d for over 1” plywood.

3.1. Wood Decking

A. Tongue-and-groove decking shall be installed in controlled random lay-up with end joints well-spaced and not closer than 24 inches at adjoining planks.

B. Decking to be installed so there shall be at least one support under each plank.

On cantilevers at least two-thirds of the planks shall bear on at least two supports.

C. Use 16d face nails at each supporting member. Toenail with 8d nails at 30-inch centers, driven at 45-degree angle starting 12 inches from end of each piece, and from 1 to 1-1/4 inches in from edge of groove.

D. Cut and nearly fit decking around rooftop projections. Use short block of laminated decking for driving deck planks tight.

E. Coordinate decking installation so that roofing installation follows immediately to minimize decking exposure to the weather.

WOOD DECK REPAIR/REPLACEMENT SECTION 06150

Alan Stevens Associates, Inc. 06150 - 16

3.2. Plywood Decking

A. Plywood decking shall be removed and replaced from framing member to framing member.

B. Plywood shall be installed with 1/8” gaps at end and edge joints. Use appropriate nails installed 6” O.C. at edges on supporting members and 12” O.C.

at intermediate supports.

C. On decks with supports greater than 24” O.C., panel clips shall be installed 24” O.C.

D. Cut and neatly fit decking around rooftop projections. Install additional framing supports as required.

E. Coordinate decking installation so that roofing installation follows immediately to minimize decking exposure to the weather.

3.3. Verification

A. Upon completion of the installation in each area, visually inspect and verify that all components are complete and properly installed. Verify that fasteners are properly located and securely anchored.

SECTION 07240

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ROOF & DECK INSULATION

A. Provide and install all roof and deck insulation and insulation fasteners as shown on the roof plan, detail drawings, or needed for a complete and proper installation.

1.2. Product Handling

A. Protection: Use all means to protect the materials of this section before, during, and after installation and to protect the work and materials of all other trades.

B. Delivery and Storage: Deliver materials to the job site in original, unopened containers no sooner than thirty (30) days prior to start of job. Materials to be stored up, off of the roof deck or ground, and covered with a weatherproof covering anchored sufficiently so as to resist wind blow-off. When storing materials on the roof, do not overstress deck.

C. U.L. Listing: Provide materials bearing U.L. classification marking on bundle, package or container indicating that materials have been produced under U.L.’s classification and follow-up service.

D. FM Listing: Provide roofing system and roof covering material which has been evaluated by Factory Mutual for fire spread, wind uplift and hail damage, and bearing FM Class I approval markings and subject to FM’s follow-up specification.

E. Replacements: In the event of damage, immediately make all repairs and replacements to the approval of the Owner and at no additional cost to the Owner.

1.3. “R” Values

A. “R” value to be based on aged material.

B. “R” value testing to be at 75 degrees F.

2.1. Insulation Materials: Insulation to be of the type and minimum thickness as listed here.

A. Gypsum Board (Single Layer)

i. Silicone-treated gypsum board with fiberglass mats at front and back.

Insulation to be a minimum of ¼” thick.

a. DensDeck Prime by Georgia-Pacific

b. Securock by USG

ROOF & DECK INSULATION SECTION 07240

Alan Stevens Associates, Inc. 07240 - 18

2.2. Insulation Fasteners

A. Wood Deck

i. Corrosion-resistant, self-tapping, self-drilling screw with low profile head.

Fastener to be carbon steel with corrosion-resistant coating. Fastener and plate shall meet FM 4470 requirements.

ii. Corrosion-resistant, factory-made plate.

iii. Screw and plate type fastener to be Factory Mutual approved.

iv. Approved Products

a. As supplied or approved by manufacturer of roof membrane installed.

v. Fasteners to be of sufficient length to penetrate deck by ¾”.

2.3. Mechanically Fastened Construction

A. Single Layer

i. Insulation to be laid with all joints staggered and tightly butted. Insulation to fit tightly around projections.

ii. Fasten insulation with screw and plate type fasteners, minimum spacing to be one (1) fastener every two (2) square feet. Install additional fasteners at perimeters and corners as required to meet local wind uplift requirements.

iii. Ensure that fasteners do not penetrate conduit or miscellaneous piping located on the underside of the decking.

iv. Insulation, which is damaged or has broken corners will be cut out and replaced with pieces 12” x 12” minimum and fastened into place.

2.4. Verification

Upon completion of the installation in each area, visually inspect and verify that all components are complete and properly installed. Verify that fasteners are properly located and securely anchored.

SECTION 07553

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FULLY ADHERED EPDM ELASTIC SHEET ROOFING

A. Furnish and install a weather and watertight elastic sheet roof complete, in place, as shown on the drawings and as specified herein, or needed for a complete and proper installation. Installation to meet local wind uplift requirements.

A. Standards: Comply with standards specified in this section and as listed in the General Requirements.

B. Qualifications of Manufacturer: Products used in the work included in this section shall be produced by manufacturers regularly engaged in the manufacture of similar items and with a history of successful production acceptable to the Owner.

C. Qualifications of Contractor: The Contractor and his personnel shall be currently approved by the manufacturer of the approved products as qualified to install the materials of this section.

D. Qualifications of Installers: Use adequate numbers of skilled workmen who are thoroughly trained and experienced in the necessary crafts and who are completely familiar with the specified requirements and the methods needed for proper performance of the work in this section.

E. Roofing Inspections: Make all required notifications and secure all required inspections by the manufacturer of the approved materials to facilitate issuance of the specified roof warranty.

F. The Roofing Contractor shall not subcontract the installation of the roof system covered under this specification to an individual or firm that is not a full-time employee of the Roofing Contractor’s company. Included shall be the following components:

i. Roof Membrane

ii. Flashings

G. U.L. Listing: Provide materials bearing Underwriters Laboratories (U.L.) marking on bundle, package or container indicating that materials have been produced under U.L.’s classification and follow-up service.

H. FM Listing: Provide roofing system and roof covering material that have been evaluated by Factory Mutual for fire spread, wind uplift and hail damage, and bearing FM Class I approval markings.

FULLY ADHERED EPDM ELASTIC SHEET ROOFING SECTION 07553

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1.3. References

A. Materials used in this section shall be listed in the latest edition of the following:

i. Factory Mutual System Approval Guide – Equipment, Materials, Services for Conservation of Property.

ii. Underwriters Laboratories, Inc. – Building Materials Directory.

B. American Society for Testing and Materials (ASTM) (latest revision)

1.4. Submittals

A. Product Data: Within 14 days prior to starting work, submit:

i. Most recent copy of manufacturer’s literature applicable to products and specifications to be used, including applicable flashing details.

ii. Complete material list of all items proposed to be furnished and installed under this section.

iii. Copy of Manufacturer’s signed Guarantee Application or Notice of Intent to

Warrant.

iv. Manufacturer’s recommended methods of installation.

When approved by the Owner, the manufacturer’s recommended methods of installation (unless superseded by the specification) will become the basis for inspecting and acceptance or rejection of the actual installation procedures used on this work.

1.5. Delivery, Storage, and Handling

A. Deliver materials to job site in their original, unopened containers. Package labels shall indicate material name, production date and/or product code. Remove manufacturer supplied plastic cover from top of product and cover with canvas tarpaulins.

B. Store materials in dry, protected areas in an upright position. Control temperature of storage areas in accordance with manufacturer’s instructions. Protect materials from exposure to the elements. Do not exceed allowable live load of storage area.

C. Use all necessary means to protect the materials in this section before, during, and after installation, and to protect the work and materials of all other trades.

D. In the event of damage, immediately make all necessary repairs and replacements subject to the approval of and at no additional cost to the Owner.

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1.6. Scheduling

A. Work is to be performed on a daily basis, with each section completed before progressing to the next day’s work unless specifically directed otherwise by the Owner’s Representative.

B. Completion of work shall be defined as the installation of all specified roof preparation, field membrane, flashings, counterflashings, sheet metal, fasteners, and caulking.

1.7. Warranty

A. As part of the work of this section, pay all required fees, secure all required inspections, and complete all items necessary to secure and deliver to the Owner a 20-year NDL labor and material warranty per Section 01750.

2.1. General

Minimum product requirements have been listed. All of these components must be used and bid. Products not supplied by the manufacturer are to be purchased from a manufacturer approved source.

2.2. Products Supplied by Manufacturer

A. Roofing Membrane – Fully Adhered Construction

i. Roof membrane is to be a nominal 60-mil, non-reinforced black EPDM sheet membrane as manufactured by Firestone Building Products, Carlisle Syntec Systems, or Johns Manville.

B. Formable flashing membrane to be nominal 60-mil, uncured sheet with a factory laminated, self-adhering EPDM tape as supplied by membrane manufacturer. Non-formable membrane flashings to be same material as roof membrane.

C. Seam primer to be specifically formulated and designed as a preparation for seam surfaces.

D. 3” seam tape to bond membrane laps and field seams as supplied by manufacturer.

E. Substrate adhesive used to bond EPDM to various substrates as supplied by manufacturer.

F. Reinforced Termination Strip (RTS) with a factory-laminated, 3" self-adhering seam tape as furnished by manufacturer.

G. Fastener sealer as supplied by manufacturer.

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H. Pipe flashings to be prefabricated with a factory laminated, self-adhering EPDM/butyl tape, complete with stainless steel band clamps, as supplied by the manufacturer.

I. Water cut-off mastic used to seal membrane sheeting at roof drains and terminations as supplied by manufacturer.

J. Protection Layer (Walk pads) with a factory laminated, self-adhering EPDM/butyl tape.

2.3. Products Supplied By Others

A. Membrane Cleaner – unleaded or white gas, toluene, or material supplied by

2.4. Other Materials

All other materials not specifically described but required for a complete and proper installation of the work in this section, shall be as selected by the Contractor, approved by the manufacturer, and subject to the approval of the Owner and/or Owner’s Representative.

3.1. Description

The latest manufacturer specifications and installation techniques are to be followed, along with the following requirements. These specific minimum requirements must be included in your bid and are not to be altered.

3.2. Inspection

Examine the areas and conditions under which work in this section will be installed.

Correct conditions are detrimental to the proper and timely completion of the work. Do not proceed until such conditions have been corrected.

3.3. Surface Conditions

A. Surfaces scheduled to receive roofing are to be free of any standing water, frost, snow or loose debris.

B. Substrate is to be smooth, free of sharp projections, and free of obvious depressions.

C. All metal fittings specified or shown on drawings are to be in place before roofing.

D. All nailers shall be securely installed prior to roofing.

E. Any bituminous contaminated surfaces and/or rough surfaces must be covered with an appropriate material to achieve a smooth uncontaminated substrate to receive the

Alan Stevens Associates, Inc. 07553 - 23 new membrane. Rough surfaces and/or bituminous contaminated surfaces must be covered with a rigid material such as plywood, DensDeck, or Securock Roof Board, mechanically fastened in place per industry standards. Other materials may be acceptable with the consultant’s prior approval provided they are approved by the roof membrane manufacturer and will completely divorce the new membrane from the contaminated surface. It is the responsibility of the roofing contractor to verify all substrate conditions and the need for additional materials as noted above.

3.4. Installation – General

A. Perform all related work specified elsewhere necessary for the installation of the specified membrane system.

B. Ensure that fasteners do not penetrate conduit or other miscellaneous items on the underside of the deck.

3.5. Installation of Roofing Membrane

A. Unroll and position roofing membrane, without stretching, over the approved substrate. Allow roof membrane to relax a minimum of 30 minutes before seaming or attaching to substrate.

B. Fold membrane back approximately in half so as to expose the underside. Sweep the mating surface and insulation to remove contaminants.

C. Apply bonding adhesive with roller to both the underside of the membrane and the cover board. Keep bonding adhesive out of seam area. Bonding adhesive shall be applied at rates as directed by the manufacturer.

D. Allow bonding adhesive to flash off until tacky. Roll the coated portion of the sheet into the coated substrate slowly and evenly to avoid wrinkling. Broom membrane to achieve full adhesion.

E. Repeat the process on the remaining half sheet.

F. Overlap each successive sheet at side laps and all end laps 3 inches minimum.

G. All seams are to be cleaned prior to seaming. Change rags and membrane cleaner often.

H. All seams are to be made with seam tape per manufacturer’s requirements. All seams are to be hand rolled.

I. All seams are to be checked for void and repairs made on a daily basis.

J. Wrinkles in seam area are to be cut out and patched.

K. Following manufacturer’s approval, apply lap sealant at all seams.

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3.6. Membrane Termination

A. Membrane to be secured at roof perimeter, around all projections larger than 12” square, and at changes in plane greater than 15 degrees.

B. Nailers must be anchored to resist a minimum pull of 175 lbs. per foot in any direction.

3.7. Flashings

A. All flashings shall be totally bonded. Unadhered flashings will not be approved.

B. Flashings are to extend a minimum of 6” onto the roof membrane.

C. Flashings shall be terminated with an aluminum termination bar secured 9” O.C. as per detail drawings and water cut-off caulking applied where flashings are terminated.

D. Flashings are to be secured at the top edge with fasteners spaced a maximum of 12”

O.C. under metal coping cap.

E. Pitch pans are to be avoided. Prior approval is required for pitch pan use.

F. Flashings to be as per detail drawing when shown.

G. Existing drain bowls to be cleaned. Broken or missing strainers and hold-downs to be replaced.

H. All pipes/round penetrations are to be flashed with prefabricated boot flashings as supplied by the manufacturer.

3.8. Temporary Water Cut-Off

A. Temporary water cut-offs are to be constructed at the end of each working day to protect the roofing, building, and building interior from damage due to the elements.

B. Temporary water cut-offs shall be constructed with EPDM membrane adhered to the existing cleaned and prepared membrane unless otherwise specifically approved by the Owner’s Representative.

C. Temporary water cut-offs are to be detailed by the Contractor and approved by the manufacturer and the Owner’s Representative.

3.9. Clean-Up

A. The contractor shall clear the construction areas and shall provide all necessary removal from the building site of all his construction debris.

B. All debris shall be removed from the premises promptly and the construction area left clean daily.

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C. The Contractor is responsible to assure that his Subcontractors have properly removed and disposed of all debris relating to their contract.

D. At the completion of the contract, contractor is to remove and dispose of all debris related to his contract. All areas set aside for staging and storage shall be returned to original conditions.

SECTION 07620

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ROOF RELATED SHEET METAL

A. Provide all new sheet metal work in connection with roofing work and parapets such as copings, counterflashings, gravel stops, and expansion joints.

A. Qualifications of Manufacturer: Products used in the work included in this section shall be produced by manufacturers regularly engaged in the manufacture of similar items and with a history of successful production acceptable to the Owner.

B. Qualifications of Installers: Use adequate numbers of skilled workmen who are thoroughly trained and experienced in the necessary crafts and who are completely familiar with the specified requirements and the methods needed for proper performance of the work in this section.

1.3. Submittals

A. Within fourteen (14) working days after the awarded contract, submit shop drawings showing location, diagrams, and details of fabrication and installation.

B. Drawings to show type and gauge of metal used. Gauges of sheet metal specified in this section are minimums.

1.4. Scheduling

A. All new sheet metal work shall be closely coordinated with the installation of the new roofing membrane.

1.5. Delivery, Storage and Handling

A. Use all necessary means to protect the materials in this section before, during, and after installation, and to protect the work and materials of all other trades. Roof surfaces shall be protected from damage at all times.

B. In the event of damage, immediately make all necessary repairs and replacements subject to the approval of and at no additional cost to the Owner.

ROOF RELATED SHEET METAL SECTION 07620

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1.6. Guarantee

A. All new materials and workmanship covering work provided under this section of the specifications shall be guaranteed in writing by the Contractor to maintain all sheet metal flashing in a watertight condition without cost to the Owner for a period of five

(5) years after date of final payment.

2.1. Design

A. All sheet metal flashings to be installed to meet ANSI/SPRI ES-1 requirements.

B. Comply with pertinent recommendations contained in “Architectural Sheet Metal

Manual”, current edition, as published by SMACNA.

C. Sheet metal shall be formed sheet shapes as indicated on the drawings and in conformance with details on the approved shop drawings.

D. Where sheet metal is required, and no material or gauge is indicated on the drawings, provide the highest quality and gauge commensurate with the referenced manual.

E. All sheet metal cleats shall be one gauge heavier than the metal flashing.

F. Sheet metal components noted on the drawings and in sections shall be fabricated from the following types and thickness of metal:

Counterflashing Prefinished .032 or 24 Gauge Edge Metal Prefinished .032 or 24 Gauge Gutters Prefinished .032 or 24 Gauge Downspouts Prefinished .032 or 24 Gauge

G. Contractor shall use gauges or thicknesses listed above or as recommended by

SMACNA manual for specific girths, whichever is greater.

H. Counterflashing shall be furnished where indicated on drawings at the top edge of all base flashings. Form flashings in not more than 10-foot lengths, lap ends 3 inches, and caulk all loose lock (watertight) joints. Counterflashing shall overlap base flashing a minimum of 3 inches.

I. New edge metal shall be furnished where indicated on the drawings. Form components in 10’-0” lengths, with adequate provision for expansion and contraction.

J. New gutters and downspouts shall be sized and constructed to equal or exceed existing drainage capacity. Refer to local rainfall intensity charts as published by the U.S. Weather Bureau for minimum sizing based on SMACNA recommendations.

Gutter style/profile shall be that of the existing, unless otherwise noted, and shall be pre-approved by the owner. Downspout size shall be constant throughout its length.

Downspouts shall be open faced.

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2.2. Fasteners

A. All fasteners must be stainless steel or carbon steel with corrosion-resistant coating.

Fastener shall show no more than 15% red rust corrosion after 30 cycles of Kesternich testing.

B. Masonry/Concrete Fasteners

i. Fasteners shall be threaded or expansion type as required by site conditions.

ii. Threaded fastener shall be stainless steel with hex washer head.

iii. Expansion fastener shall be corrosion-resistant with stainless steel nail and mushroom head.

iv. Corrosion-resistant, stainless steel, watertight, neoprene sealing washer shall be supplied for either threaded or expansion type fastener.

v. Fastener to be Factory Mutual approved.

vi. Approved Products:

a. 410 SS Tapcon hex washer head by Buildex

b. UltraCon SS4 hex washer head by Elco with Stalgard coating

c. Zamac Nailin by Fastenal

d. HMH SS 304 by Hilti

e. Approved Equal

vii. Fasteners to be nominal ¼” thickness minimum and of sufficient length to penetrate the masonry/concrete 1”.

C. Steel / Wood Fasteners

i. Corrosion-resistant, self-drilling, self-tapping screw with hex washer head for exposed fastening.

ii. Corrosion-resistant, watertight, neoprene sealing washer for exposed fastening.

iii. Approved Products:

a. Tek screw by Buildex

b. Approved Equal

iv. Fasteners to be nominal ¼” thickness minimum and of sufficient length to penetrate the steel ½” or into wood minimum 1”.

v. 1-3/4” x 11-gauge, galvanized, barbed roofing nails may be used for concealed fastening into wood.

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3.1. Inspection

A. Examine the areas and conditions under which work in this section will be installed.

Correct conditions detrimental to the proper and timely completion of the work. Do not proceed until such conditions have been corrected.

3.2. Workmanship

A. Form all sheet metal accurately and to the required dimensions and shapes.

B. All exposed edges of cut sheet metal shall be folded back on concealed surfaces.

C. Form, fabricate, and install all sheet metal so as to adequately provide for expansion and contraction in the finished work.

3.3. Weatherproofing

A. Finish all sheet metal watertight and weathertight where so required.

B. Where lap seams do not have a joint cover, lap according to pitch, but in no case less than 3”.

C. Make all lap seams in the direction of the water flow.

3.4. Joints

A. Join parts with rivets or sheet metal screws where necessary for strength or stiffness.

B. Provide suitable watertight expansion joints for all sheet metal as required for proper installation.

C. Caulking of sheet metal shall be neatly and thoroughly performed for a watertight seal.

3.5. Fastening

A. Secure metal as per detailed drawings. Do not, in any case, fasten through metal on a horizontal plane.

B. All clips and cleats are to be fastened a maximum of 12” O.C. with self-tapping screws and 6” O.C. with barbed roofing nails.

C. On the roof side, copings are to be fastened a maximum of 18” O.C. with washers and screws. Do not fasten coping pieces together at laps, or at joint covers, so as to limit expansion/contraction ability.

D. Gravel stop flanges are to be fastened 4” O.C. staggered.

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E. For concealed fastening into wood, use galvanized, barbed roofing nails 1-3/4” x 11 gauge.

F. For fastening into concrete, use masonry/concrete anchors with neoprene washers.

Use all metal anchors only, no plastic anchors allowed.

G. For exposed fastening into wood, use screws with neoprene washers. No deformed shank nails are to be used.

H. All fasteners to be stainless steel or corrosion resistant coated.

3.6. Protection

A. Roof surfaces shall be adequately protected to prevent damage.

3.7. Clean-Up

A. Debris from sheet metal work shall be frequently removed from building site as it accumulates.

B. Leave job site absolutely clean at completion of work and properly dispose of all construction debris.

SECTION 07920

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SEALANTS AND CAULKING

A. Throughout the work, caulk and seal all joints where shown on the drawings and elsewhere as required to provide a positive barrier against passage of air and passage of moisture.

B. Related Work Described Elsewhere:

i. Adhere strictly to the caulking and sealant specifications and to the detail drawings.

A. Qualifications of Manufacturer: Products used in the work included in this section shall be produced by manufacturers regularly engaged in the manufacture of similar items and with a history of successful production acceptable to the Owner.

B. Qualifications of Contractor: The Contractor and his personnel shall be currently approved by the manufacturer of the approved products as qualified to install the materials of this section.

C. Qualifications of Installers: Use adequate numbers of skilled workmen who are thoroughly trained and experienced in the necessary crafts and who are completely familiar with the specified requirements and the methods needed for proper performance of the work in this section.

D. In acceptance or rejection of the work of this section, the Owner will make no allowance for lack of skill on the part of the workmen.

A. Deliver materials to the job site in original, unopened containers. Materials are to be stored in a protected area between 40 – 80 degrees F.

B. Do not retain any material on the job site that has exceeded the shelf life recommended by its manufacturer.

C. Protect all surfaces from staining or damage. All damaged work shall be repaired or replaced as directed by the Owner’s Representative and at no additional cost to the Owner.

SEALANTS AND CAULKING SECTION 07920

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1.4. Job Conditions

A. Do not apply caulking or sealants when the surface temperature is below 40 degrees F. or above 125 degrees F. Do not apply materials when surface is damp or during cold, rainy, or frosty weather.

2.1. Sealants

A. General: Except as specifically otherwise directed by the Owner’s Representative, use only the type of sealants described in this section.

B. Sealant shall be one of the following:

i. “Silpruf”, manufactured by Silicone Products Department, General Electric

Company, Waterford, New York 12188.

ii. “MasterSeal NP-1”, manufactured by BASF Corporation Construction Systems, 889 Valley Park Dr. Shakopee, Minnesota 55379.

iii. “Dymeric”, manufactured by Tremco, 10701 Shaker Blvd., Cleveland, Ohio 44104.

2.2. Back-Up Materials

A. General: Use only those back-up materials which are specifically recommended for this installation by the manufacturer of the sealant used, and which are non-absorbent and non-staining. Back-up materials must be 1-1/2 times the width of the joint.

B. Acceptable Types Include:

i. Closed-cell, resilient urethane or polyvinyl chloride foam

ii. Closed-cell, polyethylene foam

iii. Closed-cell, sponge of vinyl or rubber

2.3. Cleaner

A. Xylol, Toluene, or commercial solvent recommended by the sealant

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2.4. Primer

A. Primer shall be as recommended by sealant manufacturer, if required.

2.5. Other Materials

A. All other materials not specifically described but required for complete and proper caulking and installation of sealants shall be first quality of their respective kinds, new, and as selected by the Contractor subject to the approval of the Owner.

3.1. Inspection

A. Examine the areas and conditions under which work in this section will be installed. Correct conditions detrimental to the proper and timely completion of the work. Do not proceed until such conditions have been corrected.

3.2. Preparation

A. Concrete and Ceramic Tile Surfaces

i. All surfaces in contact with the sealant shall be dry, sound, well brushed, and wiped free from dust.

ii. Use solvent to remove oil and grease, wiping the surfaces with clean rags.

iii. Remove all bitumen from joint area.

iv. Where surfaces have been treated, remove the surface treatment by use of sandblasting or wire brushing.

v. Remove all debris and mortar from the joint cavity.

vi. Where back-up material is required, insert the approved backer rod or bond-breaker tape in the joint cavity to the depth required.

B. Steel Surfaces

i. Use solvent to remove oil and grease, wiping the surfaces with clean rags.

ii. Remove protective coatings on steel by sandblasting or by a solvent that leaves no residue.

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C. Aluminum Surfaces

i. Aluminum surfaces in contact with sealant shall be cleaned of temporary protective coatings, dirt, oil, and grease.

ii. When masking tape is used for a protective cover, remove the tape just prior to applying the sealant.

iii. Use only such solvents to remove protective coatings as are recommended for that purpose by the manufacturer of the aluminum work and which are non-staining.

3.3. Installation of Back-Up Material

A. Use only back-up material recommended by the manufacturer of the sealant and approved by the Owner for the particular installation, compressing the back-up material 25% to 50% to secure a positive and secure fit. When using back-up of tube or rod stock, avoid lengthwise stretching of the material. Do not twist or braid hose, or rod back-up stock.

3.4. Joint Design

A. Joint depth shall never be greater than width.

i. Joint width is ¼” to ½” wide; sealant depth at midpoint is to be ¼”.

ii. Joint width is ½” to 1” wide; sealant depth at midpoint is to be ⅜” to ½”.

iii. Joint width is 1” to 2” wide; sealant depth at midpoint is to be ½”.

B. In deep joints, the sealant depth shall be controlled by the use of back-up materials to maintain the recommended depth.

C. Where depth of joint does not permit the use of back-up material then a bond breaker strip must be installed to prevent three-point bonding.

3.5. Installation of Sealants

A. General: Prior to the start of installation in each joint, verify the joint type according to the details in the drawings and verify that the required proportion of width of joint to depth of joint has been secured.

B. Equipment: Apply sealant under pressure with hand or power-actuated gun or other appropriate means. Guns shall have nozzle of proper size and shall provide sufficient pressure to completely fill joints as designed.

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C. Thoroughly and completely mask all joints where the appearance of sealant on adjacent surfaces would be objectionable.

D. Installation of Sealant: Install the sealant in strict accordance with the manufacturer’s recommendations as approved by the Owner’s Representative, thoroughly filling all joints to the recommended depth.

E. Tooling: Tool all joints to the profile shown on the details in the drawings.

Tooling to be done immediately after sealant application.

3.6. Clean-Up

A. Remove masking tape immediately after joints have been tooled.

B. Keep adjacent surfaces clean and free from sealant as the installation progresses. Use solvent or cleaning agent as recommended by the sealant