07560-Cold Coal Tar Modified 20090227.doc

Ellington Field JRB

Houston, Texas

SECTION 07560

COLD COAL TAR MODIFIED

PART 1

GENERAL

1.1

SECTION INCLUDES

A. Coal Tar Modified bituminous membrane roofing over prepared substrate at canopies of the Vehicle maintenance Facility.

1.2

RELATED SECTIONS

A. Section 06100 - Rough Carpentry: Wood blocking and nails.

B. Section 07590 - Preparation for Reroofing.

C. Section 07220 - Roof and Deck Insulation.

D. Section 07600 - Flashing and Sheet Metal.

1.3

REFERENCES

A. American Society of Civil Engineers (ASCE):

1. ASCE 7-02, Minimum Design Loads for Buildings and Other Structures.

B. American Society for Testing and Materials (ASTM):

1. ASTM D450, Specification for Coal Tar Pitch Used in Roofing, Damp proofing and Waterproofing.

2. ASTM D4990, Specification for Coal Tar Pitch Impregnated Glass Felt.

3. ASTM D43, Specification for Coal Tar Primer Used in Damp Proofing and Waterproofing.

4. ASTM D6753, Specification for Coal Tar Adhesive.

5. ASTM D227, Specification for Coal Tar Saturated Organic Felt Used in Roofing and Waterproofing.

6. ASTM D41, Specification for Asphalt Primer Used in Roofing, Damp proofing and Waterproofing.

7. ASTM D312, Specification for Asphalt Used in Roofing.

8. ASTM D451, Test Method for Sieve Analysis of Granular Mineral Surfacing for Asphalt Roofing products.

9. ASTM D1079, Terminology Relating to Roofing, Waterproofing and Bituminous Materials.

10. ASTM D1227, Specification for Emulsified Asphalt Used as a Protective Coating for Roofing.

11. ASTM D1863, Specification for Mineral Aggregate Used as a Protective Coating for Roofing.

12. ASTM D2178, Specification for Asphalt Glass Felt Used as a Protective Coating for Roofing.

13. ASTM D2822, Specification for Asphalt Roof Cement.

14. ASTM D4601, Specification for Asphalt Coated Glass Fiber Base Sheet Used in Roofing.

15. ASTM D5147, Test Method for Sampling and Testing Modified Bituminous Sheet Materials.

16. ASTM E108, Test Methods for Fire Test of Roof Coverings.

17. ASTM D6162, Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using a Combination of Polyester and Glass Fiber Reinforcements.

18. ASTM D6163, Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using Glass Fiber Reinforcements.

19. ASTM D2626, Specification for Asphalt-Saturated and Coated Organic Felt Base Sheet Used in Roofing.

20. ASTM D4586, Specification for Asbestos-Free, Asphalt Roof Cement.

C. Factory Mutual Research (FM):

1. Roof Assembly Classifications.

D. National Roofing Contractors Association (NRCA):

1. Roofing and Waterproofing Manual.

E. Underwriters Laboratories, Inc. (UL):

1. Fire Hazard Classifications.

F. Warnock Hersey (WH):

1. Fire Hazard Classifications.

1.4

SYSTEM DESCRIPTION

A. It is the intent of this specification to install a long-term, quality roof system that meets or exceeds all current NRCA guidelines as stated in the most recent edition of the NRCA Roofing and Waterproofing Manual. Please discuss any concerns with the Contracting Officer and Roofing System Manufacturer.

1.5

SUBMITTALS

A. Submit under provisions of Section [01300].

B. Product Data: Provide manufacturer’s technical product data for each type of roofing product specified. Include data substantiating that materials comply with specified requirements.

C. Samples: Submit [two (2)] samples of each product specified.

D. Manufacturer’s Installation Instructions: Submit installation instructions and recommendations indicating special precautions required for installing the membrane.

E. Manufacturer’s Certificate: Certify that materials are manufactured in the United States and conform to requirements specified herein, are chemically and physically compatible with each ther and are suitable for inclusion within the total roof system specified herein.

F. Manufacturer’s Certificate: Submit a certified copy of the roofing manufacturer’s ISO 9001 compliance certificate.

G. Test Reports: Submit test reports, prepared by an independent testing agency, for all modified bituminous sheets.

H. Submit a copy of an unexecuted manufacturer’s warranty for review.

I. Written certification from the roofing system manufacturer certifying the applicator is currently authorized for the installation of the specified roof system.

1.6 QUALIFICATIONS

A. Manufacturer: Company specializing in manufacturing the products specified in this section with minimum 12 years documented experience and have ISO 9001 certification.

B. Installer: Company specializing in modified bituminous roofing installation with a minimum [5] years experience and authorized by roofing system manufacturer as qualified to install manufacturer’s roofing materials.

C. Installer’s Field Supervision: Maintain a full-time Supervisor/Foreman on job site during all phases of roofing work and at any time roofing work is in progress. Maintain proper supervision of workmen. Maintain a copy of the specifications in the possession of the Supervisor/Foremen and on the roof at all times.

D. Immediately correct roof leakage during construction. If the Contractor does not respond within twenty four (24) hours, the Owner has the right to hire a qualified contractor and backcharge the original contractor.

E. Insurance Certification: Assist Owner in preparation and submittal of roof installation acceptance certification as may be necessary in connection with fire and extended coverage insurance roofing and associated work.

1.7

PRE-INSTALLATION CONFERENCE

A. Pre-Roofing Conference: Convene a pre-roofing conference approximately two (2) weeks before scheduled B.

commencement of modified bituminous roofing system installation and associated work.

B.

Require attendance of installer of each component of associated work: Installers of deck or substrate construction to receive roofing work, installers of rooftop units and other work in and around roofing which must precede or follow roofing work (including mechanical work if any), Contracting Officer, Owner, roofing system manufacturer’s representative, and other representatives directly concerned with performance of the Work, including (where applicable) Owner’s insurers, testing agencies and governing authorities.

C.

Objectives of conference to include:

1.

Review foreseeable methods and procedures related to roofing work.

2.

Tour representative areas of roofing substrates (decks), inspect and discuss condition of substrate, roof drains, curbs, penetrations and other preparatory work performed by others.

3.

Review structural loading limitations of deck and inspect deck for loss of flatness and for required attachment.

4.

Review roofing system requirements (drawings, specifications and other contract documents).

5.

Review required submittals both completed and yet to be completed.

6.

Review and finalize construction schedule related to roofing work and verify availability of materials, installer’s personnel, equipment and facilities needed to make progress and avoid delays.

7.

Review required inspection, testing, certifying and material usage accounting procedures.

8.

Review weather and forecasted weather conditions and procedures for coping with unfavorable conditions, including possibility of temporary roofing (if not a mandatory requirement).

9.

Record discussion of conference including decisions and agreements (or disagreements) reached and furnish copy of record to each party attending. If substantial disagreements exist at conclusion of conference, determine how disagreements will be resolved and set date for reconvening conference.

10.

Review notification procedures for weather or non-working days.

1.8

DELIVERY, STORAGE AND HANDLING

A.

Deliver products to site with seals and labels intact, in manufacturer’s original containers, dry and undamaged.

B.

Store and handle roofing sheets in a dry, well-ventilated, weather-tight place to ensure no possibility of significant moisture exposure. Store rolls of felt and other sheet materials on pallets or other raised surface.

Stand all roll materials on end. Cover roll goods with a canvas tarpaulin or other breathable material (not polyethylene).

C.

Do not leave unused materials on the roof overnight or when roofing work is not in progress unless protected from weather and other moisture sources.

D.

It is the responsibility of the contractor to secure all material and equipment on the job site. If any material or equipment is stored on the roof, the contractor must make sure that the integrity of the deck is not compromised at any time. Damage to the deck caused by the contractor will be the sole responsibility of the contractor and will be repaired or replaced at the contractors expense.

1.9

MANUFACTURER’S INSPECTIONS

When the project is in progress, the roofing system manufacturer will provide the following:

Keep the Contracting Officer informed as to the progress and quality of the work as observed.

Provide periodic job site inspections.

Report to the Contracting Officer in writing any failure or refusal of the Contractor to correct unacceptable practices called to the Contractor’s attention.

Confirm after completion that manufacturer has observed no applications procedures in conflict with the specifications other than those that may have been previously reported and corrected.

1.10

PROJECT CONDITIONS

A.

Proceed with roofing work only when existing and forecasted weather conditions will permit unit of work to be installed in accordance with manufacturer’s recommendations and warranty requirements.

B.

Do not apply roofing insulation or membrane to damp deck surface.

C.

Do not expose materials vulnerable to water or sun damage in quantities greater than can be weatherproofed during same day.

D.

All slopes of greater than 1/2:12 require back-nailing to prevent slippage of the ply sheets. Use ring or spiral shank one (1) inch cap nails or screws and plates at a rate of one (1) fastener per ply (including the modified membrane) at each insulation stop. Place insulation stops at 16 ft o.c. for slopes less than 3:12 and four (4) ft o.c. for slopes greater than 3:12. On non-insulated systems, nail each ply directly into the deck at the rate specified above.

1.11

SEQUENCING AND SCHEDULING

A.

Sequence installation of modified bituminous sheet roofing with related units of work specified in other sections to ensure that roof assemblies including roof accessories, flashing, trim and joint sealers are protected against damage from effects of weather, corrosion and adjacent construction activity.

B.

Fully complete all modified bituminous membrane roofing field assembly work each day. Phased construction will not be accepted.

1.12

WARRANTY

A.

Upon completion of installation, and acceptance by the Owner and Contracting Officer, the manufacturer will supply to the Owner 20 year “No Dollar Limit” warranty.

B.

Installer will submit a minimum of a [two (2)] year warranty to the membrane manufacturer with a copy directly to Owner.

C.

Warranty must include Section 07410 and 07412.

PART 2

PRODUCTS

2.1

ACCEPTABLE MANUFACTURERS

A.

When a particular performance standard is specified it shall be indicative of a standard required.

B.

Any item or materials submitted as a substitution to the performance specified must comply in all respects as to the quality and performance of the brand name specified. The Contracting Officer/Owner shall be the sole judge as to whether or not an item submitted as a substitute is truly equal. Should the Contractor choose to submit a substitute product, he shall assume all monetary or other risk involved, should the

Contracting Officer/Owner find the substitution unacceptable.

2.2

DESCRIPTION

Coal tar modified bituminous roofing work including but not limited to:

Two plies of SBS Modified Coal Tar Pitch fiberglass reinforced membrane and one ply of Mineral Surfaced SBS (Styrene-Butadiene-Styrene) polymer modified coal tar membrane utilizing polyester and fiberglass reinforcement bonded together and to the prepared surface with appropriate cold adhesive.

Cold Adhesive: rubberized, polymer modified cold process roofing bitumen.

Performance Requirements:

a.

Non-Volatile Content

ASTM D-4479

30% b.

Density

ASTM D-1475

9.0lb./gal.

c.

V.O.C.

ASTM D-3960

Less than 270 d.

Flash Point

ASTM D-93

105°F e.

Slope

1:12

All flashings will be set in coal tar pitch mastic and will be one ply of Coal Tar base covered by an additional layer of modified coal tar bitumen membrane.

Modified Membrane: Mineral Surfaced SBS (Styrene-Butadiene-Styrene) polymer modified coal tar membrane utilizing polyester and fiberglass reinforcement.

2.3

BITUMINOUS MATERIALS

A.

Coal Tar Primer: V.O.C. compliant, ASTM D-43.

B.

Coal Tar Mastic: V.O.C. compliant, ASTM D-6753.

C.

Cold Applied Membrane Adhesive:

ASTM D-4479

30%

Slope

1:12

D.

Coal Tar Mastic

ASTM D-4479

30%

2.4

SHEET MATERIALS

A.

Base Plies (2)

Fiberglass Reinforced base sheet coated on both sides with SBS polymer modified coal pitch compound

Properties (Finished Membrane):

Tensile Strength (ASTM D5147)

2 in/min. @73.4 3.6°F

MD 55 lbf/in

CMD 55 lbf/in

50mm/min@23@+3°C

MD 10 kN/m

CMD 10 kN/m

Tear Strength (ASTM D5147)

2 in/min. @ 73.4 3.6°F

MD 75 lbf

CMD 75 lbf

MD 333 N

CMD 333 N

Elongation at Maximum Tensile (ASTM D5147)

MD 3%

CMD 3%

CMD 3%

Base Flashing Ply

Fiberglass Reinforced base sheet coated on both sides with SBS polymer modified coal pitch compound:

Properties (Finished Membrane):

2 in/min. @73.4 3.6°F

MD 50 lbf/in

CMD 50 lbf/in

MD 75 lbf

CMD 75 lbf

CMD 3%

Coal Tar Mineral Modified Flashing Ply

ASTM D5147,

50 mm/min. @ 23 3°C

MD 11.4 kN/m

CMD 11.4 kNm

MD 110 lbf

CMD 110 lbf

MD 489N

CMD 489N

MD 3.5%

CMD 3.5%

Low Temperature Flexibility (ASTM D5147):

Passes -76°F (-60°C)

Coal Tar Mineral Surfaced Modified Membrane Ply

ASTM D5147,

MD 11.4 kN/m

CMD 11.4 kNm

MD 110 lbf

CMD 110 lbf

MD 489N

CMD 489N

MD 3.5%

CMD 3.5%

Low Temperature Flexibility (ASTM D5147):

Passes -76°F (-60°C)

2.6

RELATED MATERIALS

A.

Roof Insulation: In accordance with Section 07220.

B.

Roof Insulation Fasteners: In accordance with Section 07220.

C.

Nails and Fasteners: Non-ferrous metal or galvanized steel, except that hard copper nails shall be used with copper; aluminum or stainless steel nails shall be used with aluminum; and stainless steel nails shall be used with stainless steel, I addition plates should be used. Fasteners shall be self-clinching type of penetrating type as recommended by the manufacturer of the deck material. Nails and fasteners shall be flush-driven through flat metal discs of not less than one (1) inch diameter. Omit metal discs when one-piece composite nails or fasteners with heads not less than one (1) inch diameter are used.

D.

Metal Discs: Flat discs or caps of zinc-coated sheet metal not lighter than twenty eight (28) gauge and not less than one (1) inch in diameter. Form discs to prevent dishing. Bell or cup shaped caps are not acceptable.- termination bar should be extruded aluminum .125 x 1”

E.

Walkway Pads: As recommended and furnished by the membrane manufacturer set in approved adhesive to control foot traffic on roof top surface and give a durable system compliant non-slip walkway.

F.

Walkway Pad Adhesive: Adhesive used to adhere approved walk way pads as recommended and furnished by the membrane manufacturer

G.

Urethane Sealant: One part, non-sag sealant as approved and furnished by the membrane manufacturer for moving joints.

Tensile Strength (ASTM D412)

250 psi

Elongation (ASM D412)

950%

Hardness, Shore A (ASTM C920)

Adhesion-in-Peel (ASTM C920)

30 pli

H.

Butyl Tape: 100% solids, asbestos free and compressive tape designed to seal as recommended and furnished by the membrane manufacturer.

I.

Non-Shrink Grout: Use an all weather fast setting chemical action concrete material to fill pitch pans.

Flexural Strength (ASTM C-78 (modified))

7 days 1100psi

High Strength (ASTM C-109 (modified))

24 days 8400lbs (3810 kg)

J.

Pitch Pocket Sealer: Two part, 100% solids, self leveling, non-shrink polyurethane sealant for topping pitch pans

Durometer (ASTM D2240)

40-50 Shore

Elongation (ASTM D 412)

250%

Tensile Strength (ASTM D 412)

200 @ 100 mil

PART 3

EXECUTION

3.1

EXAMINATION

A.

Verify that deck surfaces and project conditions are ready to receive work of this section.

B.

Verify that deck is supported and secured to structural members.

Verify that deck is clean and smooth, free of depressions, projections or ripples, and is properly sloped to

Internal gutters.

Verify that adjacent roof members do not vary more than [one quarter (1/4)] inch in height.

E.

Verify that deck surfaces are dry. Verify that metal deck flutes are clean and dry.

F.

Confirm that moisture content does not exceed [twelve (12)] percent by moisture meter tests.

G.

Verify that openings, curbs, pipes, conduit, sleeves, ducts and other items which penetrate the roof are set solidly and that wood nailing strips are set in place.

3.2

GENERAL INSTALLATION REQUIREMENTS

A.

Cooperate with manufacturer, inspection and test agencies engaged or required to perform services in connection with installing the roof system.

B.

Insurance/Code Compliance: Where required by code, install and test the roofing system to comply with governing regulation and specified insurance requirements.

C.

Protect other work from spillage of roofing materials and prevent materials from entering or clogging drains and conductors. Replace or restore other work damaged by installation of the modified bituminous roofing system.

D.

Coordinate installation of roofing system components so that insulation and roofing plies are not exposed to precipitation or left exposed overnight. Provide cut-offs at end of each day’s work to cover exposed ply sheets and insulation with two (2) plies of #15 organic roofing felt set in roofing cement and with joints and edges sealed with roofing cement. Remove cut-offs immediately before resuming work.

E.

Cold applied membrane adhesive coverage rates for interply application two (2) to two and a half (2 ½) gallons per one hundred (100) square feet (plus or minus twenty five (25) percent on total job average basis.)

F.

All insulation joints must be taped along with deck penetrations to prevent bitumen from penetrating substrate joints, entering building or damaging roofing system components or adjacent building construction by applying a tape barrier.

G.

Apply roofing materials as specified by manufacturer’s instructions.

Keep roofing materials dry before and during application.

Do not permit phased construction.

Complete application of roofing plies, modified sheet and flashing in a continuous operation.

4.

Begin and apply only as much roofing in one day as can be completed that same day.

H.

Cut-Offs (Waterstops): At end of each day’s roofing installation, protect exposed edge of incomplete work, including ply sheets and insulation. Provide temporary covering of two (2) plies of #15 organic roofing felt set in roofing cement with joints and edges sealed.

I.

Broadcast minerals into the bleed out of bitumen to achieve uniform color throughout.

3.3

INSULATION INSTALLATION

A.

Refer to Section 07220 Roof And Deck Insulation.

3.4

BASE PLY INSTALLATION

A.

Fiberglass Plies: Install two Millennium base sheets in two to two and a half (2-2½) gallons per ply per square of bitumen shingled uniformly to achieve two plies throughout over the prepared substrate. Shingle in proper direction to shed water on each large area of roofing. Prior to installation, cut sheets into

18’lengths and allow to relax.

Lap ply sheet ends eight inches. Stagger end laps twelve inches minimum.

C.

Extend plies two inches beyond top edges of cants at wall and projection bases.

D.

Install base flashing ply to all perimeter and projection details.

E.

Allow the two plies of base sheet to cure at least thirty minutes before installing the modified membrane.

however, the modified membrane must be installed the same day as the base plies.

3.5

MODIFIED MEMBRANE APPLICATION

A.

Solidly bonded to the base layers with specified cold adhesive at the rate of one and one half to two (2-2 ½) gallons per 100 square feet.

B.

The roll must push a bead of adhesive in front of it with adhesive slightly visible at all side laps. Care should be taken to eliminate air entrapment under the membrane.

C.

Subsequent rolls of modified shall be installed across the roof as above with a minimum of four (4inches) side laps and eight (8inces) end laps. The end laps shall be staggered. The modified membrane shall be laid in the same direction as the underlying plys but the laps shall not coincide with the laps of the base layers.

D.

For best results, allow the cold adhesive to set for five (5) to ten (10) minutes before installing the top layer of modified membrane.

E.

Extend membrane two (2inches) beyond top edge of all cants in full moppings of the cold adhesive.

F.

All mineral surfaced end and side laps must be sealed using a hot air gun a small pencil line bead of coal tar pitch should be visible upon completion. Exercise care during application to eliminate air entrapment under the membrane.

G.

Apply pressure with a solid rubber roller to all seams to ensure that the laps are solidly bonded to substrate.

3.6

HOT AIR WELDING OF SIDE LAPS AND END LAPS

A. The laps of all mineral surfaced Millennium membranes should only be hot air welded with an electric type hot air welder (such as Leister Triac, Uniplan S, Electron or Hotjet see www.leister.com). Torching is not acceptable.

B. When hot air welding laps, the adhesive should be applied at the specified rate to the entire area up to but not including the edge of the 4” selvage or 8” end lap. Any adhesive in the lap area must be removed prior to heat welding.

C. The membrane should be set into the adhesive and pressed into place by brooming or rolling to assure contact with the adhesive under the membrane.

D. Any adhesive should be removed from the top edge of the selvage lap or underlying end of end lap prior to hot air welding the laps.

E. Avoid stepping on side laps before they have been heat sealed and rolled. Stepping on the lap can make it stick and tear when the lap is lifted for heat welding.

F. The corners of the underlying membrane at end laps and the corner of the selvage on side laps at T-joints should be cut at a 45º angle the width of the selvage (4”) (101mm). This will promote bitumen flow out at the side laps and ensure watertight “T” joints.

G.

The desired result of heat welding will be a completely sealed lap with a small pencil line bleed out of the compound visible at all edges. Where no compound is visible at edge of side lap or end lap, laps should be checked by probing the lap with a trowel after the membrane has cooled.

3.7

FLASHING MEMBRANE INSTALLATION

Seal all curb, wall and parapet flashings with an application of mastic and mesh on a daily basis. Do not permit conditions to exist that will allow moisture to enter behind, around or under the roof or flashing membrane.

B.

Prepare all walls, penetrations, expansion joints [and where shown on the drawings] to be flashed with coal tar primer at the rate of one hundred (100) square feet per gallon. Allow primer to dry tack free.

C.

Use the modified membrane as the flashing membrane. Adhere to the underlying base flashing ply with specified bitumen unless otherwise noted in these specifications. Nail off at a minimum of eight (8) inches o.c. through a termination bar and seal with a three-course application of trowel-grade mastic and fiberglass mesh at tope edge. Top of flashing must be 8” from the finished roof at all vertical surfaces.

Solidly adhere the entire sheet of flashing membrane to the substrate.

E.

Seal all vertical laps of flashing membrane with a three-course application of trowel-grade mastic and fiberglass mesh.

F.

Coordinate counter flashing, cap flashings, expansion joints and similar work with modified bitumen roofing work [as specified in other sections].

G.

Coordinate roof accessories, miscellaneous sheet metal accessory items, including piping vents and other devices with the roofing system work [as specified in other sections].

H.

Roof Edge With Internal Gutter:

Inspect the nailer to assure proper attachment and configuration.

Use one (1) ply of eighteen (18) inch (457mm) strip of heavily coated asphalt base sheet for enveloping material. Embed nine (9) inches (228mm) of the base sheet over the wood nailer and onto the roof surface in steep asphalt. Nine (9) inches (228mm) of the ply sheet should extend beyond the edge of the roof.

Run all plies to the edge. Ensure coverage of all wood nailers.

Install gutter and strapping.

Install continuous cleat fasten six (6) inches (152mm) O.C.

Fold over the extended portion of the envelope sheet and adhered the envelope in steep asphalt to the completed roof system.

7.

Install new metal edge hooked to continuous cleat and set in bed of roof cement. Extreme caution should be taken to avoid damaging the envelope during the installation and of the metal components. Fasten flange to wood nailer every three (3) inches (76mm) O.C. staggered.

8.

Prime metal edge at a rate of one hundred (100) square feet per gallon and allow to dry.

9.

Strip in flange with base flashing ply covering entire flange with six (6) inches (152mm) on to the field of roof in bitumen. Ensure ply laps do not coincide with metal laps.

10.

The second ply shall be a modified flashing ply installed over the base flashing ply installed over the base flashing ply, nine (9) inches (228mm) on to the field of roof in bitumen.

I.

Through Wall Counter flashing:

Minimum flashing height is eight (8) inches (203mm) above finished roof height. Prime vertical wall at a rate of one hundred (100) square feet per gallon and allow to dry.

Set cant in bitumen. Run asphalt base sheet ply over cant a minimum of two (2) inches (50mm)

Run all field plies to the top of the cant strip.

Install base flashing ply covering wall with six (6) inches (152mm) on to field of roof.

The second ply shall be a modified flashing ply installed over the base flashing ply and nine (9) inches (228mm) on to field of roof. All vertical seams will receive a three-course application of mastic and mesh allowed to cure and aluminize.

Apply butyl tape to wall behind flashing. Secure termination bar through flashing, butyl tape and into wall eight (8) inches (203mm) O.C Alternatively use caulk to replace the butyl tape. Seal top edge with a three-course application of mastic and mesh.

Install counterflashing and hurricane clips as shown on drawings.

3.8

APPLICATION OF SURFACING

A.

Prior to installation of surface, obtain approval from manufacturer as to work completed. On average, at least 30 days are required prior to final surfacing.

B.

Mineral Surfaced Coal Tar Membrane System: Heat fuse the end laps using a hot air gun and roller, apply pressure using the roller ¼ inch away from the edge of the sheet, until a thin bead of bitumen appears, ensure this bead is continuous.

3.9

FIELD QUALITY CONTROL

A.

Perform field inspections and testing as required [under provisions of Section 01410].

B.

Correct defects or irregularities discovered during field inspection.

C.

Require attendance of roofing materials manufacturers’ representatives at site during installation of the roofing system.

3.10

CLEANING

A.

Remove bitumen adhesive drippings from all walls, windows, floors, ladders and finished surfaces.

B.

In areas where finished surfaces are soiled by asphalt or any other sources of soiling caused by work of this section, consult manufacturer of surfaces for cleaning instructions and conform to their instructions.

C.

Repair or replace defaced or disfigured finishes caused by work of this section.

3.12

FINAL INSPECTION

A.

At completion of roofing installation and associated work, meet with Contractor, Contracting Officer, installer, installer of associated work, Owner, roofing system manufacturer’s representative and other representatives directly concerned with performance of roofing system.

B.

Walk roof surface areas of the building, inspect perimeter building edges as well as flashing of roof penetrations, walls, curbs and other equipment. List all items requiring correction or completion and furnish copy of list to each party in attendance.

C.

The roofing system manufacturer reserves the right to request a thermographic scan of the roof during final inspection to determine if any damp or wet materials have been installed. The thermographic scan shall be provided by the [Roofing] Contractor at a negotiated price.

D.

If core cuts verify the presence of damp or wet materials, the [Roofing] Contractor shall be required to replace the damaged areas at his own expense.

E.

Repair or replace deteriorated or defective work found at time above inspection as required to a produce an installation which is free of damage and deterioration at time of Substantial Completion and according to warranty requirements.

F.

Notify the Contracting Officer upon completion of corrections.

G.

Following the final inspection, provide written notice of acceptance of the installation from the roofing system manufacturer.

END OF SECTION

Cold Coal Tar Modified

07560-3