07510.doc

SECTION 07510

PART 1

GENERAL

1.1

DESCRIPTION OF WORK

Furnish the administration, facilities, materials, labor, equipment, and quality control (QC) necessary to integrate the work into the total building system so that leakage into the Built-Up Roof System (BURS) or the building does not occur. The BURS is an assembly of components including the underlayment and insulation as applicable, and roofing membrane, final surfacing, bituminous and metal flashings, and all related parts necessary to complete the assembly. The BURS manufacturer is the roofing membrane manufacturer, who may or may not manufacture and market the other components of the BURS. Complete the work to assure that the BURS satisfies the quality control standards of the BURS manufacturer's 10-year warranted system. The BUR Manufacturer Contractor's Certification, (Submittal #1), is a qualification for this contract. The contractor shall have the BURS manufacturer of the proposed roofing system execute Submittal #1 prior to the notice to proceed (NTP). QC procedures, tolerances and testing are specified in these contract documents. Nonconforming work will be rejected as a violation to these specifications.

1.2

STORAGE OF MATERIALS

Roofing materials such as insulation, felts, roll roofing, and so forth, shall be stored under cover (building, van trailers or water proof canvas tarpaulin) to protect them from rain or snow. Materials must be stored on raised platforms or pallets. Vinyl or polyethylene sheets or insulation shipping wrappers are not suitable covering and material so stored will be marked, rejected and removed from the site. Materials shall remain on the original shipping pallets or placed on raised platforms to keep them off the ground or storage surface. All rolled goods shall be stored on pallets or raised platforms ON END and not laid flat on the storage surface. Damaged or "flattened" rolls will be rejected and removed from the job site. All cants and tapered edge strips shall be protected from the weather at all times. Packaged asphalt shall be stored in a protected area to prevent contamination during storage. Wet materials shall not be used. Make sure all materials are covered by the night of delivery.

1.3

COORDINATION REQUIREMENTS

Roofing operations shall be coordinated with sheet metal work so that flashings are installed to permit continuous roof surfacing operations the same day felts are installed where practical. If gravel stops or perimeter flashings are not installed on the same day as roof completion, the roof membrane at perimeters shall be nailed with large-headed nails 8 inches on-center to perimeter wood nailers and sealed against water entry with glass fabric set in roofing cement. Roofing operations shall be coordinated with roof insulation work so that all insulation applied each day is waterproofed the same day with the complete roofing system

1.4

MATERIALS

Materials to be installed shall conform to applicable ASTM standards as specified. Certificates of compliance may be required from each respective material manufacturer at the discretion of the Contracting Officer. Certification shall be provided for all bitumen, bulk or packaged, delivered to the construction site. All materials to be installed shall be delivered to the job site bearing product labels of their manufacturer.

1.5

SUBMITTALS

Submittals 1 through 4 are included at the end of this specification. Additional submittal forms shall be obtained from the Contracting Officer if required. Submit requests for all changes (including resolution for variances) in writing. Do not proceed with any changes without written authorization from the Contracting Officer. Approvals of submittals which do not conform to the contract shall not be construed as a change unless such nonconformance is a change specifically so indicated on the submittal and approved by the Contracting Officer.

A.

Submittal #1. Built-Up Roofing System Manufacturer's Certification (Submittal #1). Submittal #1 is a qualification for award of this contract. It must be submitted prior to contract award, and be accepted by the Contracting Officer.

B.

Submittal #2. System Summary Sheet. It must be signed by both the perspective contractor and BUR manufacturer, and submitted to the Contracting Officer prior to contract award. This document is tailored to present BUR project requirements to the system manufacturer who can then ascertain the technical aspects of the project and the acceptability of the design to their 20-year warranty system.

C. Submittal #3. Designation of Roofing Quality Control Controller. The most effective means to evaluate quality installation is by thorough, continuous visual examination at the time of installation, conducted by a person who is knowledgeable in roofing technology and good workmanship practices. The contractor shall designate a person to be in charge of roofing quality control. The quality controller shall have at least 5 years experience in the supervision and inspection of BUR construction and shall not be a principal or officer of the roofing contractor's company. See paragraph 3.12., CONTRACTOR QUALITY CONTROL, for specific quality control requirements. The contractor must furnish Submittal #3 as required herein, modified as necessary, to identify the person in charge of roofing quality control. This submittal must be approved by the Contracting Officer before the work commences.

D.

Materials Approval. Within 10 days after notice to proceed, the contractor shall submit to the Contracting Officer, certifications from the insulation and fastener manufacturers/suppliers that the materials to be used conform to specified standards as applicable to produce the BURS manufacturer's 20-year warranted system.

E.

Manufacturer Publications. Four (4) copies of the following must be submitted before start of roofing work:

1.

Latest edition of each BURS manufacturer's published general requirements and applicable literature for each roofing system to be used on the buildings included in this contract.

2. Latest editions of all other applicable materials, manufacturer's products and installation literature.

F.

End of Job Submittals. Before final acceptance the contractor shall submit:

1.

A plan view drawing of each roof showing location, size and date of each day's work; location where each membrane sample was cut to include sample identification number, date sample was taken, and size of sample.

2.

Submittals #2. The manufacturer shall provide the executed 20-year BUR system warranty prior to final acceptance, along with an as-built system summary sheet.

1.6

APPLICATION REQUIREMENTS

Surfaces will be inspected and approved by the Contracting Officer or representative immediately prior to application of roofing and flashings; said inspection shall be coordinated by the contractor. The roofing or flashing shall be applied to a smooth and firm surface free of ice, frost, moisture, dirt, projections, and foreign materials. Application of roofing shall not be performed under damp or wet conditions or excessive wind conditions as determined by the Contracting Officer.

1.7

ROOF PROTECTION

When wheeled or other traffic over the partially or fully completed roofing is unavoidable, use adequate plank or plywood protection for the roofing. Mechanical application devices shall be mounted on pneumatic-tired wheels, and shall be designed and maintained to operate without damaging the insulation or the roofing membrane.

1.8

FIRE PROTECTION

Provide 15-pound minimum size fire extinguishers, using ammonium phosphate fire fighting agent. Locate two at each kettle, tanker, and site of hot bitumen application on the roof.

1.9

DAILY CLEANUP

Remove all debris from the roof. Use enclosed chute, crane and bucket or construction hoist to reduce amount of dust, dirt, and noise.

1.10

ACCEPTANCE OF COMPLETED WORK

Acceptance of completed work will be based on its conformance to the contract. Nonconforming work will be rejected. The Air Force is not obligated to accept nonconforming work at a reduced price. The contractor shall start replacement or correction of rejected work within 10 calendar days after receipt of the rejection notice. A QC program not in compliance with Part Four is considered nonconforming work. Contractor receipt of a final acceptance certificate, signed and dated by the Contracting Officer, will constitute Air Force acceptance of roofing work.

1.11 OPERATIONAL PROCEDURES

Confine operations, movement of workmen and equipment, storage, materials, and debris within limit as directed by the Contracting Officer. Do not load the deck or any part of the building structure or permit to be loaded with a weight which will cause excessive deflection or endanger safety or cause damage. Do not put kettles on the roof deck or roofing systems. Protect the building and surrounding area from damage or injury. The contractor must determine the nature of these operations and provide proper protection. Repair all damage caused by lack of such protection to the Contracting Officer's satisfaction. If repairs are not made, or if the Contracting Officer determines that repairs are beyond the contractor's ability, the Air Force will have the work done by others, and will charge the cost to the contractor.

1.12 CONTRACTOR WARRANTY

In addition to the Manufacturer Warranty described herein, the contractor shall warrant the work for a period of five (5) years from substantial completion. The warranty shall cover labor and material.

PART 2

PRODUCTS

2.1

MATERIALS

Materials shall conform to the following requirements or equivalent 20-year warranted system:

A.

Applicable for the indicated slopes over all decks.

1.

Slopes 1/8 inch to 1/2 inch per foot:

(a) Smooth (Emulsion) surfaced, with 4 plies of asphalt-coated Type IV or Type VI fibrous glass felts and asphalt, ASTM D312 Type IV.

B.

Over Metal Decks:

1.

Insulation: Two layers (minimum).

2.

Insulation attachment: Mechanical / Plate and Screw.

3.

Membrane: 4-ply roofing system.

2.2

BITUMEN

A.

Primer: ASTM D41 Asphalt Primer.

B. Asphalt: ASTM D312 type as specified herein.

2.3

FELTS, FABRICS AND MATS

A.

ASTM D2178 Type IV or Type VI Asphalt Glass Felt used in roofing and waterproofing as recommended by the manufacturer.

B.

Organic felts for envelopes and water cutoffs. ASTM D226 Asphalt-Saturated Organic Felt Type 2 (30-16).

C.

Flashing: Base flashings to be standard product of the BUR manufacturer. Modified Bitumen Flashing (APP or SBS modified) membranes may be used IAW manufacturer's instructions.

2.4

CEMENTS

A.

Asphalt Base Roofing Cement: ASTM D2822 Asphalt Roof Cement, Type II.

B.

Flashing Cement: BURS manufacturer's standard.

C.

Plastic Cement: Shall conform to FS SS-C-153 Type I Class A.

2.5

CANT AND TAPERED EDGE STRIPS

A.

ASTM C 208 Insulating Board (Cellulosic Fiber), Structural and Decorative, ASTM C 726 Mineral Fiber and Mineral Fiber, Rigid Cellular Polyurethane Composite Roof Insulation Board, or as recommended by the BURS manufacturer.

B.

Size:

1.

Cants: 4 inch x 4 inch or as required by conditions. In high wind areas, install cants in compliance with FM I-90.

2.

Tapered Edge Strips: 3 inch x 24 inches or as required by conditions.

2.6

FASTENERS

A.

Nails: Nonferrous or galvanized steel.

B.

Bolts and Nuts: ASTM A307 Carbon Steel Externally and Internally Threaded Standard Fasteners, hot-dip galvanized.

C.

Underlayment, Roof Membrane, and Base Flashing Fasteners: Types as recommended by the BURS manufacturer.

D.

Sheet Metal Fasteners:

Metal Type

Fastener Material

Galvanized Steel

Galvanized or Cadmium Plated Steel

2.7

SHEET METAL

A.

Galvanized Steel: ASTM A526 hot-dipped zinc-coated sheet steel, commercial quality. Coating designation G 90, not chemically treated, not oiled, phosphatized.

B.

Solder, Flux, and Accessories: As necessary and compatible with the material being installed.

C.

Pre-finished Galvanized Steel: ASTM A 526, Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process, Commercial Quality, coating designation G 90, not chemically treated, not oiled, phosphatized. Factory pre-finished galvanized steel shall be primed and coated with a full strength fluoropolymer (containing a minimum of 70% Kynar 500 resin). Color shall be selected by the Contracting Officer but shall be a standard factory color to match or complement the project color scheme. Provide the manufacturer's 20-year warranty.

2.8

SEALANT

A.

Sealant Primer. As manufactured and recommended by the sealant manufacturer in writing. All sealants must be used with a primer. If a manufacturer does not routinely require a primer, obtain a recommendation to fill this requirement.

B.

Sealant Backup Material. As manufactured or recommended by the sealant manufacturer for the substrate type and joint design on this project. Unless indicated or specified otherwise, all joints must have a backup material sized to be slightly compressed in the joint when installed.

C.

Color. As specified herein or, if unspecified, to match the adjacent substrate as closely as possible with standard stock colors.

D.

Sealant type for general use. FS TT-S-230C including amendment 2 single component sealing compound, Type II, Class A. Sealant material must be urethane.

E. Use sealants whose date of manufacture shows they have not exceeded their shelf life. Do not use sealants with a date of manufacture more than 12 months old.

2.9

ROOF COATING

Two coat, 280 Henry Premium White Elastomeric Roof Coating or approved equal by the Contacting Officer. Coating to be Energy Star Compliant.

PART 3

EXECUTION

3.1

GENERAL

A.

APPLICATION OF ROOFING. The entire roofing system, excluding aggregate surfacing, shall be finished in one operation up to the line of termination at end of day's work. Application of roofing shall immediately follow application insulation as a continuous operation. Phased construction will not be permitted. BURS and graveling-in shall be installed according to BURS manufacturer's requirements and specifications. To ensure a waterproof membrane, care shall be taken to preclude bare spots (voids) between plies. To prevent slippage, care shall be taken to preclude use of excessive amounts of bitumen. Kettle attendants shall be present at the kettle at all times during the heating. Application temperatures shall be measured at the mop bucket or mechanical applicator. Asphalt shall be applied at or no less than 25 degrees (F) below the manufacturer's stated EVT. Asphalt at a temperature below this shall be returned to the kettle. The surface of the felts shall be broomed-in full width to obtain complete adhesion between plies and to eliminate air pockets. The method of mopping a half sheet width and turning the sheet back to mop under the other half will not be used. Workers shall avoid walking on mopped surfaces when the bitumen is sticky. Each layer of roofing felt shall be carried up abutting vertical surfaces at least 4 inches, or the top of the cant strip.

B.

Preparation for Roofing:

1.

Removals must result in a clean and dry substrate, except for residual stains, providing a surface suitable to apply new materials. A substrate surface is suitable when application of new materials results in a uniform positive, and maximum bond between such materials and the substrate.

2.

Remove existing roof-top equipment as required; all equipment remains government property unless otherwise designated.

3.

Lift or remove metal and metal accessories indicated to remain, to aid the installation of new materials.

4.

If conditions are uncovered or created that would be detrimental to the application of specified work, immediately notify the Contracting Officer of such conditions for determination of treatment.

3.2

INSULATION INSTALLATION

A.

General Requirements:

1.

Secure cant and tapered edge strips in place with asphalt; cut and neatly fit all joints and miters. Cant strip may be tacked in place for ease of installation (approximately 3 nails every 4 feet).

2.

Insulation board, cant strips and tapered edge strips that can be readily lifted or displaced by hand are not adequately secured. Reinstall all lifted and displaced items that are not damaged. Replace damaged items with new material.

3. Follow additional applicable requirements of the roof insulation manufacturer and BURS manufacturer.

3.3

MEMBRANE INSTALLATION

A.

General Requirements. Except as modified and supplemented herein, apply membrane (4-ply) to meet the quality standards of the BURS manufacturer's 20-year warranted system. On slopes over 1 inch per foot, provide nailers and backnail felts, and if required by the BURS manufacturer on lower slopes.

B.

Felts and Roll Goods.

1.

Apply felts shingle fashion and maintain proper lap distance to result in a 2-inch nominal headlap (1-inch minimum, no maximums). Maintain a straight run of felts so that kinks or fishmouths do not result, and the felts are completely flat.

(a) Bitumen Dams. Felt envelops shall be provided at the eaves and rakes and sheet metal dams at deck penetrations to prevent bitumen drippage. Sheet metal bitumen dams shall be installed with the flange set in plastic cement on top of the insulation. Roofing felts shall be applied over the flanges with the sleeve of the dam set to prevent drippage of bitumen.

(b) Edge envelops shall be organic felt strips at least 18 inches wide. The strip shall be set in plastic cement or Type IV asphalt and positioned to extend 9 inches onto the nailer around the perimeter of the building with 9 inches lapped over the edge of the building. After roofing felt application is complete, the 9-inch overlapped section shall be folded back over the plies and mopped down to form an envelop around the perimeter of the membrane.

2.

Once established, do not change the direction of felt application. Provide organic felt envelopes at gravel stop roof edges and sheet metal pitch dams at deck penetrations to prevent bitumen drippage.

3.

Broom or squeegee each ply of roll goods into place, full width, while the bitumen is hot and fluid, such that felt does not touch felt and interply voids or skips in the bitumen do not occur. Broom or squeegee and do not walk on the freshly aid felt until bitumen has reached set temperature. Bitumen shall be visible continuously along both edges of the felt. NRCA Publication, Application Techniques for Glass Fiber Roofing Felts, shall be used as a recommended procedure.

3.4

FLASHING INSTALLATION

A. General Requirements. Install flashings as shown on the standard details and/or as recommended by the manufacturer. Modified Bitumen (MB) type membranes may be used if approved and installed per BUR manufacturer's instructions (torched, hot, cold applied, etc).

1.

Prime all surfaces to be flashed with asphalt primer and allow to dry.

2.

Completely bond all flashings to the substrate, and the flashings plies to each other without voids. Coat all flashing substrate and ply interfaces to achieve a full and uniformly bonded laminate. Flashing cement shall be applied in a continuous layer. Brushing application is not acceptable.

3.

Follow additional applicable published requirements of the BURS manufacturer.

4.

Tops of all membrane base flashings must be mechanically attached to the vertical substrate with large-headed nails 6 to 9 inches on-center.

5.

All side laps of membrane flashing surfacing sheets must be sealed with roofing cement reinforced with woven glass fiber 4 inches wide centered over the lap.

6.

Tops of all membrane base flashings must be sealed with roofing cement reinforced with 4-inch wide woven glass fiber fabric.

3.5

METAL INSTALLATION

A.

Fabricate and install metal as shown on standard details. Meet the requirements of the components of materials manufacturers, NRCA and SMACNA, as they apply to this project.

B.

The contractor is responsible for all the work required to make any displaced mechanical units operational. Included are repair, testing, and balancing to conform to the original level of performance as determined by the Contracting Officer.

C.

Prime all sheet metal that will come in contact with bituminous materials with asphalt primer and allow to dry before applying bitumen.

D.

Isolate dissimilar metals in contact by painting with a compatible bituminous coating, or by using an uncured neoprene gasket.

E.

Sheet Metal with Flanges. Follow applicable published requirements of BURS manufacturer.

F.

Do not overlap edge metal. Allow 1/-4 inch minimum spacing between edge metal pieces. Cover gap between adjacent edge metal with a joint cover 4 to 6 inches wide set in mastic.

3.6

WOOD INSTALLATION

A.

Provide wood members as indicated on standard details.

B.

Provide fasteners at not more than 2 feet 8 inches on-center, and also within approximately 6 inches of each end to secure nailers to the building construction. Anchors shall be not less than 3/8-inch in diameter and shall be countersunk and flush with top of nailer.

C.

Where nailers are stacked, secure the top nailer to the lower and spikes or nails of proper length, spaced maximum 18 inches on-center, staggered and within approximately 6 inches of all nailer ends. Ends of stacked nailers shall be offset approximately 12 inches in long runs and staggered (alternated) at corners.

D.

Brush apply one coat of copper naphthenate solution onto all cut surfaces of preservative-treated lumber.

E.

Wood cants are to be used in critical wind areas and securely anchored to prevent warping.

3.7

SEALANT INSTALLATION

A.

Follow sealant manufacturer's installation requirements except as specified herein.

B.

Clean the substrate so no contaminants such as bitumen, concrete curing compound, paint, dirt, or moisture will prevent bonding of the primer or sealant directly to the substrate.

C.

Prime with sealant primer, all substrates to which sealant will be applied and allow the primer to cure. This must be done regardless of whether the sealant manufacturer requires priming.

D.

Except for sheet metal joints, install sealant backup material.

3.8

ROOF COATING INSTALLATION

Follow the manufacturer’s installation requirements.

3.9

SURFACING

A. After roofing felts have been laid and flashings installed, the roof surface shall be flood-coated uniformly applied according to BURS manufacturer requirements and specifications.

3.10

CONTRACTOR QUALITY CONTROL

A.

It is the responsibility of the contractor to ensure that the designated roofing quality control person complies with all requirements relating to the roofing work. To accomplish this, the quality controller must observe work in progress, including observation of testing and measuring conducted by the Air Force inspector (e.g., audit procedures), and report work conditions daily. Work accomplished on a daily basis will be considered satisfactory only when the daily record form shows that all "variances" have been corrected and that the work is in conformance with the contract.

B.

Quality Assurance (QA)

1.

As specified herein, provide the QA evidence needed to establish confidence that quality control (QC) is being performed adequately.

2.

Except as modified and supplemented herein, follow the published requirements and written recommendations of the BURS and other materials manufacturers. Concerning methods of installation, industry practices apply only when this contract does not address the matter.

3.

The specified QC requirements are minimums. Provide additional QC, if in the opinion of the Contracting Officer, the QC is not effective enough to provide conforming work. This additional QC does not constitute a change to the contract.

4.

The QC is subject to audit by the Contracting Officer. Provide the Contracting Officer all information necessary for this audit.

C.

Provide quality control defined as follows:

1.

Quality control is the regulatory process by which the contractor measures actual quality performance, compares it with standards, and acts on the difference. The quality function is the entire collection of activities through which fitness for use is achieved.

2.

Contractor inspection is a careful and critical investigation of all work to assure that it conforms to the contract, and to detect variances and act to correct them in time to prevent reworking and delay. This includes detailed, skillful examination and testing with immediate comparison to the requirements of the contract. On discovery of variance the contractor shall immediately institute corrective action to eliminate the variance and to insure that all future work conforms to the requirements of the contract.

3.

The quality controller shall have at least 5 years experience in the supervision and inspection of BUR construction. The quality controller shall not be a principal or officer of the roofing contractor's company. The designated QC shall always be on the job site during BUR construction.

4.

Within 10 days after the issuance of the Notice to Proceed and before the start of roofing work, the contractor shall attend a preconstruction conference at the air base to review the contract. The quality controller and foreman or superintendent must attend the conference. A technical representative from both the membrane and insulation manufacturers shall also be present at this conference, if requested. These representatives shall be knowledgeable in the installation peculiarities and compatibility of their product. The contractor shall give an oral presentation of proposed construction method. The manufacturers' representatives shall provide input where necessary to describe the proper installation of their materials. The conference may include a visit to the work site, and a slide or video presentation relating to the job site membrane sampling and analysis.

5.

Basic quality control requirements are contained in Part Four of this specification. As a minimum, the quality controller shall perform each of the actions listed in Part Four on a daily basis. Failure to perform these actions is a failure to prosecute the work with such diligence that will ensure its compliance with tolerances specified in this contract and is grounds for the Contracting Officer to stop the work.

D.

Preparatory Inspection. (To be conducted prior to commencing work)

Before actual work begins, the quality controller must:

(a) Read the specifications and study the standard details.

(b) Understand the required tests and measurements.

(c) Visit the roof and become familiar with its layout.

2.

The quality controller shall supply the following equipment for tests and measurements required to be performed under this contract.

Calibrated portable thermometer to measure the bitumen temperature at the kettle and at the point of application.

Non-conductive measuring tape, 50 or 100 feet.

Hand-held Delmhorst Model B D-7 Moisture Meter or approved equal for determining moisture content of materials at time of installation.

(d) Tools required for cutting samples and splitting felt plies apart (cutting knife and blades).

3.

Allowable Tolerances. The following tolerances establish the range of acceptable variances. The quality controller shall review these tolerances and ensure that work is in compliance. Follow manufacturer recommendations as they apply to their 20-year warranted system. If Air Force requirements are more stringent, follow them. The work item listed after each tolerance should be used to assure compliance with this inspection.

Headlap: Minimum 1 inch, no maximum. (Work Item #9).

Endlap: Minimum 4 inches, no maximum. (No Work Item).

Insulation board joint gaps: 3/16-inch maximum between boards and 1/4-inch maximum between boards and abutting surfaces. (Work Item #8).

(d) Bitumen temperatures: (Work Item #2).

Maximum at kettle. Do not heat ASTM D312 type asphalt above 525 degrees F.

Temperature at point of application. Equiviscous Temperature (EVT) plus or minus 25 degrees F.

3.

Holding temperature. Do not heat and hold asphalt between 500 - 525 degrees F for more than 4 hours. Overnight holding temperature for asphalt shall not exceed 325 degrees F.

(e) Interply moppings. As required by the BUR manufacturer plus or minus 20 percent. (Work Item #10).

(f) Flood coat. Asphalt, 60 pounds per square average and at no location less than 50 pounds; coal tar, 70 pounds per square average and at no location less than 60 pounds.

(g) Surfacing. Uniformly cover roof area with the quantity of smooth (emulsion specified by the BUR manufacturer.

(h) Foaming hot bitumen at point of application. Not acceptable for ply mopping construction.

(i) Foreign materials between plies. None acceptable.

(j) Material variance from specified. None acceptable.

(k) Variance from number of plies specified. None acceptable.

(l) Phased construction of membrane felts. Not acceptable.

(m) Material moisture content. Maximum percent by dry weight as follows. Organic felts 2.5 pct; fiberglass felts 1 pct; lumber and plywood 12 pct; insulation as per manufacturer requirements.

(n) Felt laying. Wrinkles, buckles, kinks and fishmouths. Not acceptable.

(o) Interply voids for individual sample.

Maximum area of all glazed void. Five percent of interply area for individual sample.

Unsealed and dry voids (felt on felt). Not acceptable.

3.

Overlapping voids between 2 or more plies. Not acceptable.

E.

Initial Inspection: (To be conducted after a representative sample of the work is complete).

1.

Review each significant feature and segment of the work each day.

Deliver all materials to the site, except those in quantity (bitumen in hot bulk) with packaging intact and with readable labels. Use those materials having labels that:

Identify the material.

Indicate conformance with the reference standard applicable to the material.

3.

For bitumens in hot bulk delivered to the site in quantity, obtain a certification for each shipment.

4.

Store and handle all materials, except bitumen, metal components, and material in sealed cans, as follows:

Other materials:

Do not expose materials to water (rain, snow and so forth) before, during, or after delivery to the site.

2.

Completely cover materials with waterproof canvas tarpaulins to protect from weather and moisture. Arrange covers to prevent condensation from occurring beneath them; do not allow covers to extend onto the ground.

3.

Conspicuously mark unprotected materials and permanently remove these materials from the site.

5.

Equip kettles and tankers with automatic thermostatic controls and keep them in working order.

6.

Do not use bitumens which have been overheated, heated and held beyond specified storage period, or contaminated bitumens. Permanently remove such bitumens from the site.

F.

Daily Work Production.

1.

Roofing operations shall be coordinated with sheet metal work so that flashings are installed to permit continuous roof surfacing operations the same day felts are installed where practical. If gravel stops or perimeter flashings are not installed on the same day as roof completion, the roof membrane at perimeters shall be nailed with large-headed nails 8 inches on-center to perimeter wood nailers and sealed against water entry with glass fabric set in roofing cement. Roofing operations shall be coordinated with roof insulation work so that all insulation applied each day is waterproofed the same day with complete roofing system.

2.

Install temporary water cutoffs and tie-ins each workday. Remove temporary cutoffs and tie-ins so that all vertical faces of insulation are exposed at the beginning of the next day's work. (Work Item #4).

3.

Do not cut the staggered insulation pieces that are already installed. Straighten the staggered insulation side of the day's work with unattached cut pieces of insulation; do not permanently include such cut pieces into the roof system.

G.

Weather Considerations. Except for expedient temporary work, do not proceed with roofing work during inclement weather. Remove all temporary work before installing permanent components and materials (Work Item #5).

H.

Follow-up Inspection. (To be conducted daily to assure compliance with results of initial inspection.)

1.

Check items mentioned in preparatory and initial inspections.

2.

A copy of these records and contractor tests, as well as the corrective action taken, shall be furnished to the Air Force as directed by the Contracting Officer.

3.11

NON-DESTRUCTIVE TESTING

The Air Force reserves the right to perform non-destructive evaluation (NDE) of the in-place roofing assembly to determine whether or not the newly installed roofing assembly has been affected by moisture infiltration. Testing shall be at Air Force expense. The contract is encouraged to be present during the time of NDE.

END OF SECTION

SUBMITTAL #1

BUILT-UP ROOFING (BUR) MANUFACTURER

PRE-AWARD CERTIFICATION SUBMITTAL

The following statement is required from the BUR manufacturer. The BUR manufacturer is defined as the roof membrane product manufacturer who may or may not manufacture the other system components, such as metal or other flashings, insulation, and fasteners.

This is to advise that ______________________________ (roofing contractor/ subcontractor) is an approved applicator of our roofing system and is capable of obtaining our 20-year labor and materials warranty/guaranty. We will execute the 10-year BUR warranty/guaranty certification upon the successful completion of all work in accordance with the project plans and specification or as modified to comply with our 10-year roofing system requirements, which ever is most stringent.

We have reviewed the System Summary Sheet for Project No. _______________ at ________________________ (location). We certify that the built-up roofing systems listed below and described in the attached product literature are suitable for use with the roof system construction specified for this project as it relates to normal wear and exposure to the elements.

We certify that the specified insulation's are compatible with the membrane and would qualify for our 20-year materials and labor warranty/guaranty. We accept responsibility for defects or failure of, or improper application of, roof insulation used as a base over which the roofing is applied, except the roof deck. This warranty applies only to total tear-off replacement.

We understand that proposed changes relating to the roofing system will be submitted for our review and acceptance. A signed copy approving the concept of the change will be returned to the Contracting Officer.

Building Number

Roofing System Designation

(Membrane) (Insulation)

A technical representative can be made available to attend the pre-construction conference to discuss proper installation procedures for our BUR system. A technical representative will also be available to make at least one in-progress inspection and one final acceptance inspection of the BUR installation.

Roofing Manufacturer

Firm Name:

Address:

Authorized Representative

Signature:

Printed or Typed Name:

Signed This _________ Day of __________ 19_____

SUBMITTAL #2

SYSTEM SUMMARY SHEET

(To be completed and signed by an approved roofing contractor and BURS manufacturer prior to contract award.)

This is to notify you that we shall apply your full 10 year labor and materials warranty/guaranty to the following project.

Solicitation No.

Name of Job

Name of Building

Address of Building: Street City State Zip

Type and Use of Building

Owner of Building

Address: Street City State Zip

New Building

Recover

Tear Off

No. of Squares ______ Mfg Spec # _______ No. of Feet of Flashing _______ Mfg Spec #

Description of Project:

Roof Slope:

Does the roof have adequate drainage? Yes No

Deck:

Steel Gauge Joist Spacing Width of Rib

Wood Type Thickness Joist Spacing

Lightweight Concrete

Min. Thickness

Concrete

Structure Wood Fiber Trade Name

Gypsum

Other (Specify)

Vapor Retarder:

No Yes Old New

New Insulation:

Fiberboard Perlite Isocyanurate Other

EPS Urethane Cellular Glass Fiberglass Phenolic

Attachment Mechanical Fastener

Hot Asphalt

Insulation Manufacturer No. of Layers Thickness

Recover Info:

Number of Existing Roofs?

Existing Surface? Smooth Gravel Cap Sheet

Loose Gravel to be Removed? Yes No Wet Insulation? Yes No

Waterlogged Areas to be Removed? Yes No

Roof Vents to be Used? Yes No Spacing

This job will be completed in accordance with the contract specifications or the latest issue of the BURS manufacturer "Commercial Roofing Specifications" manual, which ever is most stringent, and we will use only the undersigned manufacturer's products unless other products are approved by the BURS manufacturer.

We plan to start this job on

We plan to complete the job on

Name of Roofing Contractor/Subcontractor:

Phone No.

Signature of Company Official:

Title:

Print Name:

We acknowledge your notification that U.S. Government 20-year BURS Warranty/Guaranty will be required on the roof described above and will sign and issue this warranty/guaranty to the government upon your successful completion of this project. There will be a charge to you of $

Manufacturer:

Authorized Representative:

Date:

SUBMITTAL #3

APPOINTMENT OF QUALITY CONTROLLER

__________________________________ is appointed as quality controller of Project:

__________________________________ with the authority to regulate the quality of the work so that it conforms to the contract. The quality controller is authorized to order discontinuance of any operation causing nonconforming work.

The quality controller is experienced in the supervision and inspection of the BURS construction similar to that required in this contract. The quality controller understands all requirements of these specifications.

Name of Firm:

Telephone:

Authorized Representative's Signature:

Printed or Typed Name:

I acknowledge receipt of this letter.

Quality Controller's Signature

Printed or Typed Name:

SUBMITTAL #4

BUILT-UP ROOFING (BUR) SYSTEM

20-YEAR LABOR AND MATERIAL WARRANTY/GUARANTY

Warranty Coverage:

This system is delivered subject to a full material and workmanship warranty/guaranty for 20 years that guarantees that the manufacturer will pay all costs necessary to maintain the built-up roofing membrane and flashing system in a water-tight condition as a result of the following causes: deterioration from ordinary wear and tear of the elements; poor workmanship on the part of the contractor; defects in materials; defects in the manufacturer's specifications; blisters, bare spots, fishmouths, wrinkles or ridges in the built-up roof; and splits in the built-up roof membrane caused by movement of the roof insulation or any other underlying surface or material used as a base over which the roof system is applied, excluding the deck. Specific conditions that will affect warranty/guaranty coverage and exclusions from coverage are not covered by this warranty/guaranty.

_______ specified roof system is our 20-year system design and the insulations specified are compatible with our materials. As the manufacturer of this system, we also accept responsibility for making repairs to the roofing system at no additional cost to the government, to correct defects in, failure of, or improper application of, roof insulation used as a base over which the roof is applied, except the roof deck.

If the manufacturer fails to make required emergency and permanent repairs during the warranty/guaranty period, as stated after notice by telephone from the contracting office, the government may have the work done by others and charge the cost to the manufacturer. The warranty provisions of this contract apply notwithstanding government inspection and acceptance. A separate warranty/guaranty is required for each building. Failure to perform the work resulting in the government having the work performed will not void this warranty/guaranty.

TERMS, CONDITIONS, LIMITATIONS:

Emergency repairs shall be made within 48 hours of receipt of notice by telephone from the Contracting Officer and weather permitting, the manufacturer agrees to permanently repair the affected areas within 30 days by restoring them to a water-tight condition, without cost to the government. If it is determined that leaks were caused by either an exclusion from coverage or specific condition listed below, the manufacturer will repair the defects and an equitable payment will be made by the government.

EXCLUSIONS FROM COVERAGE:

1.

Natural disasters, acts of God (lightning, hurricanes, tornadoes, sustained winds exceeding 75 MPH as recorded at the nearest meteorological center, earthquakes, hail.)

2.

Acts of negligence or abuse and misuse by government personnel, accidents, vandalism, civil disobedience, war, or damage caused by falling objects.

3.

Damage by structural failure, settlement, movement, distortion, warpage, or displacement of structure.

4.

Failure of material or flashings caused by movement of metal work not supplied by manufacturer issuing warranty/guaranty.

5.

Leaks caused by repairs or alterations of roof system or installation of structures, fixtures or utilities on or through roof without prior written approval of manufacturer.

6.

Storage of material on roof.

7.

Moisture entering roof system through walls, copings, or any part of building structure except the roof, including from adjacent building.

8.

Fire.

9.

Faulty construction or design of building, including parapet walls, copings, chimneys, skylights, vents, or of roof deck but specifically excluding construction above the deck, i.e., insulation, base sheet, fasteners, adhesive, vapor retarders, and so forth.

10.

Infiltration or condensation of moisture in or through underlying area; vapor condensation beneath the roof greater than the acceptable ambient moisture content for the given material as established by the appropriate American Society for Testing and Materials (ASTM) standard in effect at the time of installation.

11.

Damage or leaks attributable to ponding water, defined as water in ponded areas that does not drain or evaporate within a 48 hour period.

12.

Under no circumstances is the manufacturer responsible for damages to the building, its contents or roof deck.

13.

Membrane splits caused by structural movement.

SPECIFIC CONDITIONS THAT WILL AFFECT WARRANTY/GUARANTY COVERAGE:

1.

Failure to use reasonable care in maintenance; failure to follow manufacturer's written maintenance instructions.

2.

Failure of owner to make repairs to leaks not covered by manufacturer's warranty/guaranty.

3.

Repair work by any contractor other than BUR manufacturer approved contractor or use of unapproved material.

4.

Changes in building usage which may affect roof performance unless approved in writing by the BUR manufacturer prior to such change.

DETERMINATION OF RESPONSIBILITY:

Receipt of notice by telephone or in writing from the contracting office is evidence that the Contracting Officer has had the roof examined by a technically qualified representative of the government and has determined, based on this examination, that none of the above causes apply and the manufacturer is obligated to make the repairs.

Within 30 days of receipt of the above notice by the manufacturer that a roofing system defect covered by the warranty/guaranty has been discovered, the manufacturer, to avoid application of the warranty/ guaranty, must notify the Contracting Officer in writing of the existence of an exclusion stated herein. Failure to provide such notice will preclude the manufacturer from later disputing the coverage of the warranty/guaranty.

The government has the right to perform both visual and nondestructive evaluations of the roof system, at government expense, any time during the warranty/guaranty period to validate water tightness of the roof system.

After the occurrence of an exclusion from coverage or a specific condition which renders the warranty/guaranty ineffective, the warranty/guaranty shall be allowed to continue as long as the government returns the roofing system to it s original condition and the manufacturer is allowed to inspect or oversee the repair. The burden to establish the existence of an exclusion or specific condition is on the manufacturer.

The 20-year coverage period starts from the date the facility or roofing system is accepted by the government from the contractor.

BENEFICIARY

It is understood by the manufacturer and contractor that the warranty/guaranty provided herein shall be for the benefit of the United States Government.

OTHER WARRANTIES

The warranty contemplated herein shall be in addition to and not in lieu of any warranty/guaranty otherwise applicable to the work or materials used in the contract.

BURS Manufacturer Firm Name:

(PRINT OR TYPE)

Title:

Manufacturer's Warranty/Serial Number:

for Building No. _____________ located at

Warranty/Guaranty expiration date:

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