Attachment 4 - Supplemental Specifications.docx

FOREST SERVICE SUPPLEMENTAL SPECIFICATIONS

BIRCH CREEK CCC CAMP ROOFING REPLACEMENT

SECTION 000050 – BIRCH CREEK CCC CAMP ROOFING REPLACEMENT

1.1 GENERAL

This item shall consist of installing a new roof on Block Hall, Birch Creek Lodge, Lodgepole Cabin, Emerich Hall, Recreation Hall, and the Captain’s Quarters on the Beaverhead-Deerlodge National Forest, on the Dillon Ranger District at the Birch Creek CCC Camp. Work includes but is not limited to removing/replacing SBS modified bitumen rolled roofing, replacing roof sheathing, installing weather proofing and water barriers, and installing required trim for roofs. If there are any questions about acceptable materials or techniques to be used, please contact the CO.

Any and all unused excess materials and property paid for will be retained by the Forest Service. Arranging a storage location for excess material will be at the discretion of the Contracting Officer.

The project is located at Birch Creek CCC Camp. Access to this site in the winter is dependent on weather.

The project includes 6 buildings of varying use.

A. Transportation: The Contractor shall provide adequate and safe methods for trucking and transporting equipment and materials onto and off the projects sites. All Local, State, and federal regulations and laws shall be complied with by the Contractor during trucking and transporting operations on Local, County, State, and Forest roads.

B. Clean substrate of any projections and substances detrimental to roofing work.

C. Proceed with installation of underlayment, and roofing materials only when weather conditions are in compliance with manufacturer’s recommendations and when substrate is completely dry.

1.2 DEMOLITION OF EXISTING ROOF

Temporary Protection: Maintain integrity of building enclosures keeping all openings, holes, joints, and gaps sealed to prevent entry from bats or other wildlife. Erect temporary protection, such as walks, fences, railings, and canopies, where required to protect residents of the buildings.

1. Provide protection to ensure safe passage of people around building demolition area to and from occupied portions of adjacent buildings and structures, in accordance with Federal OSHA requirements.

2. Warning Signs and Labels: Provide warning signs at all approaches and doors to the work areas. Locate signs at such a distance that personnel may read the sign and take the necessary protective steps required before entering the area. Warning signs may be in the form of continuous plastic tape. At a minimum signs should read

WARNING

DO NOT ENTER

ROOFING WORK

Alternate wording for the warning signs will be approved by the Contracting Officer.

1.3 DIMENSIONS FIELD VERIFICATION

A. Field verify all dimensions affecting the work of this contract prior to ordering materials.

A. When more than one class, size, type, thickness, etc. is specified in the Schedule of Items for any pay item, suffixes will be added to the item number to differentiate between the pay items.

B. Payment shall be by units defined and determined according to U.S. Standard measure and by the following:

1. Linear Foot (LF): Measurement of work along its length from point-to-point; parallel to the base or foundation. Do not measure overlaps.

2. Lump Sum (LSQ): One complete unit.

3. Square Foot (SF): Measured on a plane parallel to the surface being measured.

C. Method of measurement: One of the following methods of measurement for determining final payment is designated on the Schedule of Items for each pay item:

1. ACTUAL QUANTITIES (AQ) - These quantities are determined from actual measurements of completed work.

2. DESIGNED QUANTITIES (DQ) - These quantities denote the final number or units to be paid for under the terms of the contract. They are based upon the original design data available prior to advertising the project. Original design data include the preliminary survey information, design assumptions, calculations, drawings, and the presentation in the contract. Changes in the number of units shown in the Schedule of Items may be authorized under any of the following conditions:

· As a result of changes in the work authorized by the CO.

· As a result of the CO determining that errors exist in the original design that cause a pay item quantity to change by 15 percent or more.

· As a result of the Contractor submitting to the CO a written request showing evidence of errors in the original design that cause a pay item quantity to change by 15 percent or more. The evidence must be verifiable and consist of calculations, drawings, or other data that show how the designed quantity is believed to be in error.

3. LUMP SUM QUANTITIES (LSQ) - These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job. They shall not be measured.

1.6 All Submittals - It will be the Contractor's responsibility to submit information on all items required with such promptness as to cause no delay in the work. Approvals must be obtained before starting work on parts of the project which involves the submittal. Contractor shall allow 10 calendar days for processing of submittals by the Government.

A. Submit four copies of submittals and shop drawings to the Contracting Officer for approval on the items required herein. Circle or check items to be used on submittals. Highlighter pens may print black over writing or may not show up at all when copied and should not be used. One copy of all submittals and shop drawings will be returned to the contractor. Information must be adequate to determine compliance with specifications.

B. Substitution - Materials in the specifications may be followed by the words "or approved equal." In these cases, wherever the name or brand of a manufacturer's article is specified, it is used as a measure of quality and utility or a standard. If the Contractor prefers to use any other brand or manufacturer of same quality, appearance and utility to that specified, he shall request substitution as provided below, not less than 10 days before the planned installation of the item. The Contracting Officer will approve or disapprove the request for substitution and his decision shall be final. Unless substitutions are requested within the time stated above and as provided below, no deviation from the specifications will be allowed.

Requests for substitutions will only be considered if contractor submits the following:

1.7 Related Work - The work shall be in accordance with these specifications. The following is a list of the specifications that are included with this package.

SECTION 000050 – BIRCH CREEK CCC CAMP ROOFING REPLACEMENT

SECTION 001900 – MOBILIZATION

SECTION 024119 – SELECTIVE DEMOLITION

SECTION 061000 – ROUGH CARPENTRY

SECTION 072516 – STYRENE-BUTADINE-STYRENE (SBS) MODIFIED BITUMEN MEMBRANE ROOFING

SECTION 077000 – ROOF AND WALL SPECIALTIES AND ACCESSORIES

SECTION 074113 – ROUGH CARPENTRY

END OF SECTION

USDA FOREST SERVICE, R-1

BIRCH CREEK CCC CAMP ROOFING REPLACEMENT

1 SECTION 000050

SECTION 019000 - MOBILIZATION

PART I - GENERAL

1.1 Mobilization - This item is intended to compensate the Contractor for operations including, but not limited to, those necessary for the movement of personnel, equipment, supplies, and incidentals to the project site; for payment of premiums for bonds and insurance for the project; and for any other work and operations which must be performed or costs that must be incurred incident to the initiation of meaningful work at the site and for which payment is not otherwise provided for under the contract.

1.2 Method of Measurement - The measurement shall be lump sum for mobilization.

1.3 Basis of Payment - The lump sum price shall include full compensation for mobilization. Progress payments for mobilization will be made as follows:

A. Bond premiums will be reimbursed after receipt of the evidence of payment.

B. 50% of the lump sum, not to exceed 5% of the original contract amount, will be paid following completion of 5% of the original contract amount not including mobilization and bond premiums.

C. Payment of the remaining portion of the lump sum, up to 10% of the original contract amount, will be paid following completion of 10% of the original contract amount not including mobilization and bond premiums.

D. Any portion of the lump sum in excess of 10% of the original contract amount will be paid after final acceptance.

Progress payments for mobilization and preparatory work shall be subject to retainage.

PART II - PRODUCTS (Not Applicable)

PART III - EXECUTION (Not Applicable)

END OF SECTION

USDA FOREST SERVICE, R-1

BIRCH CREEK CCC CAMP ROOFING REPLACEMENT

1 SECTION 019000

SECTION 024119 - SELECTIVE DEMOLITION

PART 1 - GENERAL

1.1 Items indicated to be removed become Contractor's property. Detach materials designated for removal from existing construction, and dispose of the existing roofing materials and items of off National Forest in accordance with all state and federal laws. The Contractor shall be responsible for all costs, royalties, arrangements, procurement, cleanup, and work associated with a waste disposal area.

1.2 Government will occupy portions of building immediately adjacent to selective demolition area. Conduct selective demolition so Owner's operations will not be disrupted. It is not expected that hazardous materials will be encountered in the work. If hazardous materials are encountered, do not disturb; immediately notify CO in writing. Hazardous materials will be removed by Government under a separate contract action.

1.2 Measurement of Payment - SELECTIVE DEMOLITION, will be paid incidentally to other line items and will include all costs of demolition, collection haul, fees, and waste disposal.

PART 2 PRODUCTS (NOT USED)

PART 3 - PEFORMANCE REQUIREMENTS

A. Regulatory Requirements: Comply with EPA regulations and with hauling and disposal regulations of authorities having jurisdiction.

B. Standards: Comply with ANSI/ASSE A10.6 and NFPA 241.

PART 4 - EXECUTION

A. DEMOLITION

Maintain services/systems indicated to remain and protect them against damage during selective demolition operations. Before proceeding with demolition, provide temporary services/systems that bypass area of selective demolition and that maintain continuity of services/systems to other parts of the building.

Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent buildings and facilities to remain.

Provide temporary weather protection to prevent water leakage and damage to structure and interior areas.

Neatly cut openings and holes, keeping work square, plumb and true to dimensions required. Use cutting methods least likely to damage existing construction or adjoining construction.

Clean adjacent structures, driveways, walkways, lawns, and improvements of dust, dirt, nails, and debris caused by selective demolition operations. Return adjacent areas to condition existing before selective demolition operations began at the end of each night.

All trash and construction debris resulting from installation, demolition, and construction are the responsibility of the Contractor and shall be removed and disposed of legally. It is the Contractor’s responsibility to locate an acceptable disposal area, and to pay all costs involved in the disposal of materials.

END OF SECTION

1 SECTION 024119

SECTION 061000

ROUGH CARPENTRY

PART 1 - GENERAL

SUMMARY

This Section includes the following:

Wood framing.

Wood supports.

Wood blocking.

Wood cants.

Wood nailers.

Wood furring.

Wood grounds.

Wood sheathing.

Wood subflooring.

Wood underlayment.

Plywood backing panels.

Building wrap.

SUBMITTALS

Product Data: For each type of process and factory-fabricated product indicated.

Include data for wood-preservative and fire-retardant treatment from chemical treatment manufacturer and certification by treating plant that materials comply with requirements.

Research/Evaluation Reports: For the following:

Treated wood.

Engineered wood products.

Power-driven fasteners.

Powder-actuated fasteners.

Expansion anchors.

Metal framing anchors.

Building wrap.

PART 2 - PRODUCTS

MANUFACTURERS

In other Part 2 articles where subparagraph titles below introduce lists, the following requirements apply for product selection:

Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the work include, but are not limited to, the manufacturers specified.

WOOD PRODUCTS, GENERAL

Lumber: DOC PS 20 and applicable rules of lumber grading agencies certified by the American Lumber Standards Committee Board of Review.

Factory mark each piece of lumber with grade stamp of grading agency.

For exposed lumber indicated to receive stained or natural finish, mark grade stamp on end or back of each piece or omit grade stamp and provide certificates of grade compliance issued by grading agency.

Provide dressed lumber, S4S, unless otherwise indicated.

Provide dry lumber with 15 percent maximum moisture content at time of dressing for 2-inch nominal (38-mm actual) thickness or less, unless otherwise indicated.

Engineered Wood Products: Acceptable to authorities having jurisdiction and for which current model code research or evaluation reports exist that show compliance with building code in effect for Project.

Allowable Design Stresses: Meet or exceed those indicated per manufacturer's published values determined from empirical data or by rational engineering analysis and demonstrated by comprehensive testing performed by a qualified independent testing agency.

Wood Structural Panels:

Plywood: Either DOC PS 1 or DOC PS 2, unless otherwise indicated.

Oriented Strand Board: DOC PS 2.

Comply with "Code Plus" provisions in APA Form No. E30K, "APA Design/Construction Guide: Residential & Commercial."

WOOD-PRESERVATIVE-TREATED MATERIALS

Preservative Treatment by Pressure Process: AWPA C2 (lumber) and AWPA C9 (plywood), except that lumber that is not in contact with the ground and is continuously protected from liquid water may be treated according to AWPA C31 with inorganic boron (SBX).

Wood for Wood Foundation Systems: WPB FDN.

Wood for Ground Contact Use: AWPB LP-22.

Wood for Aboveground Use: AWPB LP-2.

Kiln-dry material after treatment to maximum moisture content of 15 percent for plywood.

Mark each treated item with treatment quality mark of an inspection agency approved by the American Lumber Standards Committee Board of Review.

Application: Treat items indicated on Drawings, and the following:

Wood cants, nailers, curbs, equipment support bases, blocking, stripping, and similar members in connection with roofing, flashing, vapor barriers, and waterproofing.

Wood sills, sleepers, blocking, furring, stripping, and similar concealed members in contact with masonry or concrete.

Wood framing members less than 18 inches (460 mm) above grade.

Wood floor plates that are installed over concrete slabs directly in contact with earth.

FIRE-RETARDANT-TREATED MATERIALS

General: Where fire-retardant-treated materials are indicated, provide materials that comply with performance requirements in AWPA C20 (lumber) and WPA C27 (plywood). Identify fire-retardant-treated wood with appropriate classification marking of UL, U.S. Testing, Timber Products Inspection, or another testing and inspecting agency acceptable to authorities having jurisdiction.

Use treatment for which chemical manufacturer publishes physical properties of treated wood after exposure to elevated temperatures, when tested by a qualified independent testing agency according to ASTM D 5664, for lumber and ASTM D 5516, for plywood.

Use treatment that does not promote corrosion of metal fasteners.

Use Exterior type for exterior locations and where indicated.

Use Interior Type A High Temperature (HT), unless otherwise indicated.

DIMENSION LUMBER

General: Of grades indicated according to the American Lumber Standards Committee National Grading Rule provisions of the grading agency indicated.

Non-Load-Bearing Interior Partitions: Construction, Stud, or No. 2 Standard, Stud, or No. 3 grade and any of the following species:

Northern species; NLGA.

Western woods; WCLIB or WWPA.

Framing Other Than Non-Load-Bearing Partitions: Construction, Stud, or No. 3 grade and any of the following species:

Douglas fir-larch, Douglas fir-larch (north), or Douglas fir-south; NLGA, WCLIB, or WWPA.

Hem-fir or Hem-fir (north); NLGA, WCLIB, or WWPA.

Spruce-pine-fir (south) or Spruce-pine-fir; NELMA, NLGA, WCLIB, or WWPA.

Framing Other Than Non-Load-Bearing Partitions: Any species of machine stress-rated dimension lumber with a grade of not less than 2400f-2.0E.

Exposed Framing: Hand select material for uniformity of appearance and freedom from characteristics that would impair finish appearance.

Species and Grade: Hem-fir or Hem-fir (north), Select Structural grade; NLGA, WCLIB, or WWPA – saw texture.

Species and Grade: Spruce-pine-fir or Spruce-pine-fir (south), No. 1 grade; NELMA, NLGA, WCLIB, or WWPA – saw texture.

Redwood, clear all heart grade per RIS rules.

Cedar, “A” grade, saw texture, per western red cedar rules.

TIMBER AND MISCELLANEOUS LUMBER

For timbers of 5-inch nominal (117-mm actual) size and thicker, provide material complying with the following requirements:

Species and Grade: Douglas fir-larch, Douglas fir-larch (north), or Douglas fir-south; Select Structural No. 1 grade; NLGA< WCLIB< or WWPA.

Provide miscellaneous lumber for support or attachment of other construction, including the following:

Rooftop equipment bases and support curbs.

Blocking.

Cants.

Nailers.

Furring.

Grounds.

For items of dimension lumber size, provide Construction, Stud, or No. 2-grade lumber with 19 percent maximum moisture content of any species.

For concealed boards, provide lumber with 19 percent maximum moisture content and any of the following species and grades:

Northern species, No. 3 Common grade; NLGA.

Western woods, Standard or No. 3 Common grade; WCLIB or WWPA.

SHEATHING

Plywood Roof Sheathing: [Exposure 1, Structural I] [Exposure 1] sheathing.

Span Rating 48/24, ¾” or 7/8” or 23/32” thick.

MISCELLANEOUS MATERIALS

Fasteners:

General: Provide fasteners of size and type indicated that comply with requirements specified in this article for material and manufacture.

For [roof] [parapet] [and] [wall] sheathing, provide fasteners [with hot-dip zinc coating complying with ASTM A153/A153M] [of Type 304 stainless steel].

For [roof] [parapet] [and] [wall] sheathing, provide fasteners with organic-polymer or other corrosion-protective coating having a salt-spray resistance of more than 800 hours in accordance with ASTM B117.

Nails, Brads, and Staples: ASTM F1667.

Power-Driven Fasteners: Fastener systems with an evaluation report acceptable to authorities having jurisdiction, based on ICC-ES AC70.

Screws for Fastening Sheathing to Wood Framing: ASTM C1002.

Screws for Fastening Wood Structural Panels to Cold-Formed Metal Framing: ASTM C954, except with wafer heads and reamer wings, length as recommended by screw manufacturer for material being fastened.

Metal Framing Anchors: Made from hot-dip, zinc-coated steel sheet complying with ASTM A 653/A 653M, G60 (Z180) coating designation.

Allowable Design Loads: Meet or exceed those indicated per manufacturer's published values determined from empirical data or by rational engineering analysis and demonstrated by comprehensive testing performed by a qualified independent testing agency.

Sheathing Tape: Pressure-sensitive plastic tape for sealing joints and penetrations in sheathing and recommended by sheathing manufacturer for use with type of sheathing required.

Sill-Sealer Gaskets: Glass-fiber-resilient insulation, fabricated in strip form, for use as a sill sealer; 1-inch (25-mm) nominal thickness, compressible to 1/32 inch (0.8 mm); selected from manufacturer's standard widths to suit width of sill members indicated.

Adhesives for Field Gluing Panels to Framing: Formulation complying with ASTM D 3498 that is approved for use with type of construction panel indicated by both adhesive and panel manufacturers.

PART 3 - EXECUTION

INSTALLATION

Set rough carpentry to required levels and lines, with members plumb, true to line, cut, and fitted. Fit rough carpentry to other construction; scribe and cope as needed for accurate fit. Locate furring, nailers, blocking, grounds and similar supports to comply with requirements for attaching other construction.

Apply field treatment complying with AWPA M4 to cut surfaces of preservative-treated lumber and plywood.

Securely attach rough carpentry work to substrate by anchoring and fastening as indicated, complying with the following:

CABO NER-272 for power-driven fasteners.

Published requirements of metal framing anchor manufacturer.

Table 23-II-B-1, "Nailing Schedule," and Table 23-II-B-2, "Wood Structural Panel Roof Sheathing Nailing Schedule," in the Uniform Building Code.

Table 2306.1, "Fastening Schedule," in the Standard Building Code.

Table 602.3(1), "Fastener Schedule for Structural Members," and Table 602.3(2), "Alternate Attachments," in the International One- and Two-Family Dwelling Code.

Use finishing nails for exposed work, unless otherwise indicated. Countersink nail heads and fill holes with wood filler.

Framing Standard: Comply with AFPA's "Manual for Wood Frame Construction," unless otherwise indicated.

Framing with Engineered Wood Products: Install engineered wood products to comply with manufacturer's written instructions.

Comply with applicable recommendations contained in APA Form No. E30K, "APA Design/Construction Guide: Residential & Commercial," for types of structural-use panels and applications indicated.

Comply with "Code Plus" provisions in above-referenced guide.

Fastening Methods:

Combination Subfloor-Underlayment: Glue and nail to wood framing.

Subflooring: Glue and nail to wood framing.

Sheathing: Nail to wood framing.

Underlayment: Nail to subflooring.

Plywood Backing Panels: Nail or screw to supports.

Apply sheathing tape to joints between sheathing panels and at items penetrating sheathing. Apply at upstanding flashing to overlap both flashing and sheathing.

1. END OF SECTION 061000

1 SECTION 061000

SECTION 075216

STYRENE-BUTADIENE-STYRENE (SBS) MODIFIED BITUMINOUS MEMBRANE ROOFING

1. GENERAL

SUMMARY

Section Includes:

Styrene-butadiene-styrene (SBS)-modified bituminous membrane roof system.

Roofing membrane sheet materials.

Base sheet materials.

Interply sheets.

Styrene-butadiene-styrene (SBS)-modified bituminous cap sheet.

Base flashing sheet materials.

Asphalt materials.

Accessory roofing materials.

Substrate board.

Roof insulation.

Insulation accessories and cover board.

Electronic leak detection (ELD) materials.

Walkways.

ACTION SUBMITTALS

Product Data: For each type of product.

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

Base flashings and membrane terminations.

Flashing details at penetrations.

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

Wind Uplift Resistance Submittal: For roofing system indicating compliance with wind uplift performance requirements.

INFORMATIONAL SUBMITTALS

Manufacturer Certificates:

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

Submit evidence of complying with performance requirements.

Special Warranty Certificate: Signed by roof membrane manufacturer, certifying that all materials supplied under this Section are acceptable for special warranty.

Product Test Reports: For roof membrane and insulation, tests performed by a qualified testing agency, indicating compliance with specified requirements.

Sample warranties.

CLOSEOUT SUBMITTALS

Maintenance data.

QUALITY ASSURANCE

Qualifications:

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

WARRANTY

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

Warranty Period: 10 years from date of Substantial Completion.

PRODUCTS

PERFORMANCE REQUIREMENTS

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.

Wind Uplift Resistance: Design roofing system to resist the following wind uplift pressures when tested according to FM Approvals 4474, UL 580, or UL 1897:

Zone 1 (Roof Area Field): 27.1 lbf/sq.ft.

Zone 2 (Roof Area Perimeter): 29.8 lbf/sq.ft Location: From roof edge to 2.2 ft inside roof edge.

Zone 3 (Roof Area Corners): 36.6 lbf/sq.ft Location: 2.2 ft in each direction from each building corner.

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.

Wind Uplift Load Capacity: 90 psf

MANUFACTURERS

Styrene-Butadiene-Styrene (SBS)-Modified Bituminous Membrane Roof System: See the following articles for individual roof materials required.

MuleHide – SA Base Sheet, Nail Base Sheet, SA-SBS Cap Sheet. MuleHide.com or approved equal.

BASE SHEET MATERIALS

SBS-Modified Bitumen Type I, Glass-Fiber-Mat Base Sheet: ASTM D6163/D6163M, Type I, Grade S, SBS-modified asphalt sheet, reinforced with glass fibers, smooth surfaced, suitable for cold adhesive or hot asphalt application method.

MuleHide Nail Base Sheet

INTERPLY SHEETS

Glass-Fiber Interply Sheet: ASTM D6163/D6163M, Type I, Grade S, SBS-Modified asphalt sheet, reinforced with glass fibers, smooth surfaced, suitable for cold adhesive.

Mule Hide SA Base Sheets

STYRENE-BUTADIENE-STYRENE (SBS) MODIFIED BITUMINOUS CAP SHEET

SBS-Modified Bitumen Type I, Glass-Fiber-Mat, Granule-Surfaced Cap Sheet: ASTM D6163/D6163M, Type I, Grade G, SBS-modified asphalt sheet, reinforced with glass fibers, suitable for cold adhesive or hot asphalt application method.

MuleHide SA-SBS Cap Sheet Granule Color: Green. Contractor shall submit color to CO for approval.

BASE FLASHING SHEET MATERIALS

SBS-Modified Bitumen Backer Sheet: ASTM D6163/D6163M, Type I, Grade S, reinforced with glass fibers, smooth surfaced, suitable for application method specified.

ASPHALT MATERIALS

Asphalt Primer: ASTM D41/D41M.

ACCESSORY ROOFING MATERIALS

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

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

Prefabricated Pipe Flashings: As recommended by roof membrane manufacturer.

Asphalt Roofing Cement: ASTM D4586/D4586M, asbestos free, of consistency required by roofing system manufacturer for application.

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

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.

Roofing Granules: [Ceramic-coated] roofing granules, No. 11 screen size with 100 percent passing No. 8 (2.36-mm) sieve and 98 percent of mass retained on No. 40 (0.425-mm) sieve; color to match roof membrane.

Miscellaneous Accessories: Provide those recommended by roofing system manufacturer.

EXECUTION

EXAMINATION

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

Perform fastener-pullout tests according to roof system manufacturer’s recommendations.

Submit test result within 24 hours of performing tests.

Include manufacturer's requirements for any revision to previously submitted fastener patterns required to achieve specified wind uplift requirements.

INSTALLATION OF ROOFING, GENERAL

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.

Complete terminations and base flashings, and provide temporary seals to prevent water from entering completed sections of roofing system at the end of the workday or when rain is forecast.

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

Coordinate installing roofing system components, so insulation is not exposed to precipitation or left exposed at the end of the workday.

Comply with roofing system and insulation manufacturer's written instructions for installing roof insulation.

INSTALLATION OF ROOFING MEMBRANE, GENERAL

Install roofing system according to roofing system manufacturer's written instructions and applicable recommendations in ARMA/NRCA's "Quality Control Guidelines for the Application of Polymer Modified Bitumen Roofing."

Where roof slope exceeds 3:12, install roofing membrane sheets parallel with slope.

Backnail roofing sheets according to roofing system manufacturer's written instructions.

Coordinate installation of roofing system so insulation and other 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.

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

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

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

INSTALLATION OF BASE SHEET

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.

Installation of SBS-Modified Fiberglass-Mat Base Sheet:

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

Extend roofing sheets over and terminate above cants.

Mechanically attach base sheet to roof deck using mechanical fasteners specifically designed and sized for fastening base sheet to wood panel decks.

Fasten base sheet to resist specified uplift pressure at corners, perimeter, and field of roof.

Install base sheet without wrinkles, rears, and free from air pockets.

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

Lap side laps as recommended by roof membrane manufacturer but not less than 3 inches (76 mm).

Lap end laps as recommended by roof membrane manufacturer but not less than 12 inches (300 mm).

Stagger end laps not less than 18 inches (450 mm).

Completely bond and seal laps, leaving no voids.

Roll laps with a 20-pound (9-kg) roller.

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

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.

INSTALLATION OF INTERPLY SHEETS

Install one ply sheet, starting at low point of roofing.

Align ply sheets without stretching.

Extend ply sheets over and terminate above cants.

INSTALLATION OF SBS-MODIFIED BITUMINOUS CAP SHEET

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.

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

Extend cap sheet over and terminate above cants.

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

Install cap sheet so side and end laps shed water.

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

Lap side laps as recommended by roof membrane manufacturer but not less than 3 inches (76 mm).

Lap end laps as recommended by roof membrane manufacturer but not less than 12 inches (300 mm).

Stagger end laps not less than 18 inches (450 mm).

Completely bond and seal laps, leaving no voids.

Roll laps with a 20-pound (9-kg) roller.

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

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.

Apply roofing granules of same color as roof membrane to cover exuded bead at laps while bead is hot, to provide a continuous color appearance.

INSTALLATION OF FLASHING AND STRIPPING

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

Prime substrates with asphalt primer if required by roofing system manufacturer.

Extend base flashing up walls or parapets a minimum of 8 inches (200 mm) above roofing membrane and 4 inches (100 mm) onto field of roofing membrane.

Mechanically fasten top of base flashing securely at terminations and perimeter of roofing.

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

FIELD QUALITY CONTROL

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

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

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

PROTECTING AND CLEANING

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

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 CO.

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.

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

END OF SECTION 075216

1 SECTION 075216

SECTION 077000

ROOF SPECIALTIES AND ACCESSORIES

PART 1 - GENERAL

SUMMARY

This Section includes the following:

Roof curbs.

Equipment supports.

Relief vents.

Ridge vents.

Snow guards.

Drip Edge.

Flashing Roof vents Maintenance & Repainting

SUBMITTALS

Product Data: For each product indicated.

Coordination Drawings: Roof plans are drawn approximately to scale and coordinating penetrations and roof-mounted items are indicated. Contractor shall field verify dimensions and Penetrations sizes and locations.

Samples and Colors: for each exposed finish

QUALITY ASSURANCE

Standards: Comply with the following:

SMACNA's "Architectural Sheet Metal Manual" details for fabrication of units, including flanges and cap flashing to coordinate with type of roofing indicated.

NRCA's "Roofing and Waterproofing Manual" details for installing units.

PART 2 - PRODUCTS

MATERIALS

Aluminum:

Sheet: ASTM B 209 (ASTM B 209M) for alclad alloy 3005H25 or alloy and temper required to suit forming operations, with mill finish, unless otherwise indicated.

Extrusions: ASTM B 221 (ASTM B 221M) alloy 6063-T52 or alloy and temper required to suit structural and finish requirements, with mill finish, unless otherwise indicated.

Galvanized Steel Sheet: ASTM A 653/A 653M with G90 (Z275); commercial steel, unless otherwise indicated.

Aluminum-Zinc Alloy-Coated Steel Sheet: ASTM A 792/A 792M with Class AZ-50 (AZ-150) coating, structural quality, Grade 40 (Grade 275), or as required for strength.

Wood Nailers: Softwood lumber, pressure treated with waterborne preservatives for aboveground use, complying with AWPA C2; not less than 1-1/2 inches (38 mm) thick.

Fasteners: Same metal as metals being fastened, or nonmagnetic stainless steel or other noncorrosive metal as recommended by manufacturer. Match finish of exposed fasteners with finish of material being fastened.

Gaskets & Closure systems: Manufacturer's standard tubular or fingered design of neoprene, EPDM, Polyethylene, or PVC; or flat design of foam rubber, sponge neoprene, or cork. UV resistant product.

Bituminous Coating: SSPC-Paint 12, solvent-type bituminous mastic, nominally free of sulfur and containing no asbestos fibers, compounded for 15-mil (0.4-mm) dry film thickness per coating.

Mastic Sealant: Polyisobutylene; nonhardening, nonskinning, nondrying, nonmigrating sealant.

Elastomeric Sealant: Recommended by unit manufacturer that is compatible with joint surfaces; ASTM C 920, Type S, Grade NS, Class 25.

Roofing Cement: ASTM D 4586, nonasbestos, fibrated asphalt cement designed for trowel application or other adhesive compatible with roofing system.

UNDERLAYMENT MATERIALS

Self-Adhering Sheet Underlayment, Polyethylene Faced: Vycor Ice and Water Shield or approved equal. ICC ESR-1677, minimum of 40-mil- (1.02- mm-) thick, slip-resisting, tensile strength 250 psi, ~0.14 lb/sf, polyethylene-film-reinforced top surface laminated to SBS-modified asphalt adhesive, with release paper backing; cold applied.

METAL FLASHING AND TRIM

Fabricate sheet metal flashing and trim to comply with recommendations in SMACNA's "Architectural Sheet Metal Manual" that apply to design, dimensions, metal, and other characteristics of item.

Apron Flashings: Fabricate with lower flange a minimum of 5 inches (125 mm) over and 4 inches (100 mm) beyond each side of downslope asphalt shingles and 6 inches (150 mm) up the vertical surface.

Step Flashings: Fabricate with a headlap of 2 inches (50 mm) and a minimum extension of 5 inches (125 mm) over the underlying asphalt shingle and up the vertical surface. Or as recommended by roofing manufacturer instructions.

Drip Edges: Fabricate in lengths not exceeding 10 feet (3m) with 2-inch (50 mm) roof deck flange and 1-1/2 inch (38 mm) fascia flange with 1/2 inch (9.6 mm) drip at lower edge.

Vent Pipe Flashing: ASTM B 749, Type L51121, at least 1/16 inch (1.6 mm) thick. Provide lead sleeve size to slip over and turn down into pipe, soldered to skirt at slope of roof and extending at least 4 inches (100 m) from pipe onto roof.

Available Manufacturing Requirements: American made product. Subject to compliance with roofing manufacturing requirements.

ROOF CURBS AND EQUIPMENT SUPPORTS

General: Units capable of supporting superimposed live and dead loads, including equipment

DRIP EDGE

Available Manufacturing Requirements: American made product. Subject to compliance with roofing manufacturing requirements.

General: Metal Drip Edge needs 1⁄2" overhanging the rakes and eaves.

MAINTENANCE REPAINTING

GENERAL REQUIRMENTS

Available Manufacturing Requirements: American made product. The fascia boards are to be painted before installing the drip edge. Paint should match existing fascia boards.

PREPARATORY CLEANING, PAINT REMOVAL, PATCHING, AND REPAIRING

Fascia board needs to be preparatorily cleaned with chemical cleaning or pressure washer. Then loose, hanging, compromised paint needs to be removed with hand tools such as a wire brush. Then begin the patching and repairing to the drip edges exposed sides with substrates with dents and gouges larger than 1/4 inch.

QUALITY ASSURANCE

Color Matching: Computer matched.

A Material Safety Data Sheet (MSDS) needs to be provided by the paints manufacturer for each color scheme used.

2.9 FLASHING

Available Manufacturing Requirements: American made product. Subject to compliance with roofing manufacturing requirements.

PART 3 - EXECUTION

INSTALLATION

General: Coordinate installation of roof accessories with installation of roof deck, roof insulation, flashing, roofing membranes, penetrations, equipment, and other construction to ensure that combined elements are waterproof and weathertight. Anchor roof accessories securely to supporting structural substrates so they are capable of withstanding lateral and thermal stresses, and inward and outward loading pressures.

Install roof accessory items according to construction details in NRCA's "Roofing and Waterproofing Manual," unless otherwise indicated, Separation: Separate metal from incompatible metal or corrosive substrates, including wood, by coating concealed surfaces, at locations of contact, with bituminous coating or providing other permanent separation.

Flange Seals: Unless otherwise indicated, set flanges of accessory units in a thick bed of roofing cement to form seal.

Cap Flashing: Where required as component of accessory, install cap flashing to provide waterproof overlap with roofing or roof flashing (as counterflashing). Seal overlap with thick bead of mastic sealant.

Operational Units: Test-operate units with operable components. Clean and lubricate joints and hardware. Adjust for proper operation.

Heat-and-Smoke Vents: Locate, install, and test according to NFPA 204M.

Clean exposed surfaces according to manufacturer's written instructions. Touch up damaged metal coatings.

END OF SECTION 077000

1 SECTION 077000