Roof_Repair_Spec.pdf

SECTION 011250 – MEASUREMENT AND PAYMENT

USDA FOREST SERVICE, R-4

SJ HOUSING BARRACKS #1 & #3 ROOF REPAIR

SECTION 011250 - MEASUREMENT AND PAYMENT

PART 1 - GENERAL

1.1 SUMMARY

A. Measurement and payment for contract work will be made only for and under those pay items included in the Schedule of Items. All other work, labor, materials, equipment, and incidentals necessary to successfully complete the project will be considered as included in the payment for items shown. This section defines the method of measurements and basis of payment for work items listed in the Schedule of Items.

B. 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.

1.2 DETERMINATION OF QUANTITIES

A. The following measurements and calculations shall be used to determine contract quantities for payment.

1. For individual construction items, longitudinal and lateral measurements for area computations shall be made horizontally or corrected to horizontal measurement unless otherwise specified. Measurements for geotextiles, netting and erosion control blankets shall be along slope lines.

2. For excavation or embankment volumes, the average end area method shall be used to compute volumes. However, if in the judgment of the Contracting Officer (CO), the average end area method is impractical, measurement shall be made by volume in hauling vehicles or by other three-dimensional methods.

3. For Structures, they shall be measured according to neat lines shown on the drawings or as altered by the CO, in writing, to fit field conditions.

4. For items that are measured by the linear foot, such as pipe culverts, fencing, guardrail, piping, utilities, and underdrains, measurements shall be made parallel to the base or foundation upon which the structures are placed.

5. For aggregates weighed for payment, the tonnage shall not be adjusted for moisture content, unless otherwise provided for.

6. For standard manufactured items (such as fence, wire, plates, rolled shapes, pipe conduits) identified by gauge, weight, section dimensions, and so forth, such identifications shall be considered the nominal weights or dimensions. Unless controlled by tolerances in cited specifications, manufacturer's tolerances shall be accepted.

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Attachment 1

B. Earthwork Tolerances - Adjustments of horizontal or vertical alignment, within the tolerances specified in this contract, or shifts of balance points up to 100 feet shall be made by the contractor as necessary to produce the designed sections and to balance earthwork. Such adjustments shall not be considered as "Changes."

1.3 UNITS OF MEASUREMENT

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

1. Acre: Make longitudinal and transverse measurements for area computations horizontally.

2. 50lb Bag: Measurement will be for the actual number of 50lb bags of standard bentonite grout.

3. 94lb Bag: Measurement will be for the actual number of 94lb bags of standard cement or grout.

4. Cubic Yard (CY): A measurement computed by one of the following methods:

a. Excavation, Embankment, or Borrow. The measurement computed by the average end area method from measurements made longitudinally along a centerline or reference line.

b. Material in Place or Stockpile. The measurement computed using the dimensions of the in-place material.

c. Material in the Delivery Vehicle. The measurement computed using measurements of material in the hauling vehicles at the point of delivery. Vehicles shall be loaded to at least their water level capacity. Leveling of the loads may be required when vehicles arrive at the delivery point.

5. Each (EA): One complete unit, which may consist of one or more parts.

6. Gallons (GAL): The quantity shall be measured by any of the following methods:

a. Measured volume in container.

b. Metered volume by approved metering system.

c. Commercially package volume.

7. Hour (HR): Measurement will be for the actual number of hours (or fraction thereof) ordered by the Contracting Officer and performed by the contractor.

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

9. Lump Sum (LS): One complete unit.

10. Mile: Measured horizontally along the centerline of each roadway, approach, or ramp.

11. Pound (LB): For sacked or packaged material, measurement will be the net weight as packed by the manufacturer.

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

13. Square Yard (SY): Measured on a plane parallel to the surface being measured.

14. Ton: Measured as a short ton consisting of 2,000 pounds.

1.4 METHOD OF MEASUREMENT

A. The following method of measurement for determining final payment is designated on the

Schedule of Items for each pay item:

1. 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.

PART 2 - PRODUCTS (NOT APPLICABLE)

PART 3 - EXECUTION (NOT APPLICABLE)

END OF SECTION 011250

November 2011

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SECTION 024100 – WASTE MATERIAL DISPOSAL

SECTION 024100 - WASTE MATERIAL DISPOSAL

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes the loading, handling, hauling, and placing of excess excavation material, unsuitable excavation material, clearing and grubbing debris, and construction and demolition debris.

1.2 MEASUREMENT AND PAYMENT

A. There will be no separate measurement or payment for work in this Section. Waste material disposal is considered incidental to other items of work shown in the Schedule of Items.

PART 2 - PRODUCTS – NOT APPLICABLE

PART 3 - EXECUTION

3.1 WASTE MATERIAL TO BE HAULED TO A LANDFILL

A. All excess excavation material shall be stockpiled on site at a locations designated by the

Contracting Officer’s Representative.

B. All demolition materials, garbage, and other refuse generated shall be removed from the project site and legally disposed off of Government property in an approved landfill.

C. All stumps, slash and other clearing and grubbing debris shall be hauled to a landfill.

D. The contractor is responsible for all costs and permits associated with landfill disposal.

E. The Government is not responsible for waste material upon its departure from the project site.

END OF SECTION 024100

June 2013

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SECTION 075200 – MODIFIED BITUMINOUS MEMBRANE ROOFING – COLD-APPLIED

SECTION 075200 – MODIFIED BITUMINOUS MEMBRANE ROOFING-COLD APPLIED

PART 1 - GENERAL

1.1 SUMMARY

A. This work includes performing all work necessary to demolish and dispose the existing 4-ply hot mop asphalt roof w/ drip edge on Barrack #1, and installation of a modified bituminous membrane roof with cold process adhesive and drip edge on the entirety of the roofs of Barrack

#1 and #3, both located on the SJ Housing site.

1. Remove and dispose of the existing roofing down to structural deck on Barracks #1.

2. Inspect decking for damage and replace with like material as necessary on Barracks #1, verification by owner or roofing manufacturer required.

3. Mechanically fasten Type VI fiberglass base sheet according to specification.

4. Install SBS (Styrene-Butylene-Styrene) interply in cold process adhesive according to specification.

5. Install SBS mineral cap sheet according to specification.

6. Install new metal details throughout project, no existing metal components to be reused.

7. Final inspection with owner and roofing manufacturer prior to project close out.

1.2 SUBMITTALS FOR REVIEW

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

B. Specimen Warranty: Provide an unexecuted copy of the warranty specified for this Project, identifying the terms and conditions required of the Manufacturer and the Owner.

1.3 SUBMITTALS FOR INFORMATION

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

B. Manufacturer's Certificate: Certify that roof system furnished is approved by Factory Mutual, Underwriters Laboratories, Warnock Hersey or approved third party testing facility in accordance with ASTM E108, Class A for external fire and meets local or nationally recognized building codes.

C. Manufacturer's Certificate: Certify that the roof system is adhered properly to meet or exceed the requirements of FM 1-90.

D. Manufacturer's Certificate: Certify that the roof system furnished is approved or accepted by

Factory Mutual Approval Standard 4470.

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 other, 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.

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

H. Design Loads: Submit copy of manufacturer's minimum design load calculations according to

ASCE 7-05, Method 2 for Components and Cladding, sealed by a registered professional engineer.

1.4 CONTRACT CLOSEOUT SUBMITTALS

A. Special Project Warranty: Provide specified warranty for the Project, executed by the authorized agent of the Manufacturer.

B. Roofing Maintenance Instructions. Provide a manual of manufacturer's recommendations for maintenance of installed roofing systems.

C. Demonstration and Training Schedule: Provide a schedule of proposed dates and times for instruction of Owner's personnel in the maintenance requirements for completed roofing work.

1.5 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 prevent 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. Secure all material and equipment on the job site. If any material or equipment is stored on the roof, assure that the integrity of the deck is not compromised at any time. Damage to the deck caused by the Contractor's actions will be the sole responsibility of the Contractor, and the deck will be repaired or replaced at his expense.

1.6 MANUFACTURER’S INSPECTIONS

A. When the Project is in progress, the roofing system manufacturer will provide the following:

1. Report progress and quality of the work as observed.

2. Provide periodic job site inspections, minimum of two days per week.

3. Report to the Owner in writing any failure or refusal of the Contractor to correct unacceptable practices called to the Contractor's attention.

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

1.7 PROJECT CONDITIONS

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

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B. Do not apply roofing membrane to damp deck surface.

C. Do not expose materials subject to water or solar damage in quantities greater than can be weatherproofed during same day.

1.8 SEQUENCING AND SCHEDULING

A. Sequence installation of 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. Complete all roofing field assembly work each day. Phased construction will not be accepted.

1.9 WARRANTY

A. Upon completion of installation, and acceptance by the Owner, the Manufacturer will supply to the Owner a minimum of a twenty (20) year water tight warranty.

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

1.10 MEASUREMENT AND PAYMENT

A. Barracks #1 – Measurement and Payment shall be Lump Sum Quantity (LSQ) as shown in the

Schedule of Items including demolition and disposal of existing 4-ply hot mop roofing and drip edge, roof preparation, installation of the bituminous membrane roofing and drip edge, and all labor and materials associated with the work.

B. Barracks #3 – Measurement and Payment shall be Lump Sum Quantity (LSQ) as shown in the

Schedule of Items including installation of the bituminous membrane roofing and drip edge, and all labor and materials associated with the work.

PART 2 - PRODUCTS

2.1 GENERAL

A. Materials, manufacturer's product designations, and/or manufacturer's names specified herein shall be regarded as the minimum standard of quality required for work of this Section.

2.2 DESCRIPTION

A. Materials to be compatible and from the same manufacturer comprising the 2-ply SBS cold process adhesive applied modified bituminous membrane roof.

B. Modified bituminous sheet roofing work including but not limited to:

1. One ply of Type VI fiberglass base sheet mechanically attached to the prepared substrate.

2. Cold Applied Bitumen: V.O.C. compliant, non-asbestos containing cold applied adhesive for roof slopes up to 3:12 applied to the top of each ply except the modified membrane.

3. Base Flashing Ply: One (1) ply of SBS grade base sheet with a minimum 70 mil thickness and dual fiberglass reinforced scrim fully adhered w/ cold applied bitumen to one ply of

Type VI fiberglass base sheet nailed to substrate.

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4. Modified Membrane: a minimum of 135 mil thickness SBS granulated (light colored), rubber modified roofing membrane with dual fiberglass reinforced scrim fully adhered w/ cold applied bitumen to one ply of SBS base flashing ply.

2.3 BITUMINOUS MATERIALS

A. Asphalt Primer: V.O.C. compliant, ASTM D41.

B. Asphalt Roofing Mastic: V.O.C. compliant, ASTM D2822, Type II.

C. Cold Applied Membrane Adhesive: V.O.C. compliant ASTM D3019. Performance

Requirements:

1. Non-Volatile Content ASTM D4479 70%

2. Density ASTM D1475 7.89 lbs./gal. (0.9kg/l)

3. Viscosity Stormer ASTM D562 16-20 sec.

4. Flash Point ASTM D93 100°F min. (37°C)

D. Brush Grade Flashing Adhesive. Performance Requirements:

1. Non-Volatile Content ASTM D4479 70 min.

2. Density ASTM D1475 8.6 lbs./gal. (1kg/l)

3. Flash Point ASTM D93 100°F (37°C)

2.4 SHEET MATERIALS

A. Base Flashing Ply: Fiberglass scrim with the following minimum performance requirements according to ASTM D5147.

1. Tensile Strength (ASTM D5147)

a. 2 in/min. @ 73.4 ± 3.6°F MD 100 lbf/in CMD 100 lbf/in

b. 50mm/min. @ 23 ± 3°C MD 39 kN/m CMD 39 kN/m

2. Tear Strength (ASTM D5147)

a. 2 in/min. @ 73.4 ± 3.6°F MD 110 lbf CMD 110 lbf

b. 50mm/min. @ 23 ± 3°C MD 1335 N CMD 1335 N

3. Elongation at Maximum Tensile (ASTM D5147)

a. 2 in/min. @ 73.4 ± 3.6°F MD 2.5 % CMD 2.5 %

b. 50mm/min@ 23 ± 3°C MD 2.5 % CMD 2.5 %

B. Modified Membrane Properties (Finished Membranes) according to ASTM D6162, Type III

Grade G

1. Tensile Strength (ASTM D5147)

a. 2 in/min. @ 73.4 ± 3.6°F MD 500 lbf/in CMD 550 lbf/in

b. 50 mm/min. @ 23 ± 3°C MD 87.5 kN/m CMD 96.2 kN/m

2. Tear Strength (ASTM D5147)

a. 2 in/min. @ 73.4 ± 3.6°F MD 900 lbf CMD 950 lbf

b. 50 mm/min. @ 23 ± 3°C MD 4003 N CMD 4226 N

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3. Elongation at Maximum Tensile (ASTM D5147)

a. 2 in/min. @ 73.4 ± 3.6°F MD 6.0% CMD 6.0%

b. 50 mm/min. @ 23 ± 3°C MD 6.0% CMD 6.0%

4. Low Temperature Flexibility (ASTM D5147): Passes -30°F (-34°C)

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.

C. Verify that deck is clean and smooth, free of depressions, projections or ripples.

D. Verify that adjacent roof substrate components do not vary more than [1/4] inch in height.

E. Verify that deck surfaces are dry [and free of snow or ice].

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

G. Inspection and approval to be made prior to new roof application. Approval to be made in writing to COR.

3.2 DECK PREPARATION

A. Wood Deck

1. Verify that wood decking is flat and has tight joints, seal joints with tape as needed.

2. Fill knot holes/deck imperfections with latex filler as needed.

3.3 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. Code Compliance: Where required by code, install and test the roofing system to comply with governing regulation 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 coal tar 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 an SBS modified base sheets set in cold applied mastic with joints and edges sealed with roofing cement. Remove cut-offs immediately before resuming work.

E. Substrate Joint Penetrations: Prevent bitumen from penetrating substrate joints, entering building, or damaging roofing system components or adjacent building construction.

F. Apply roofing materials as specified by manufacturer's instructions.

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1. Keep roofing materials dry before and during application.

2. Do not permit phased construction.

3. 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.

3.4 BASE PLY INSTALLATION

A. Mechanically fasten first Type VI fiberglass base sheet according to manufacturer’s requirements.

B. Install (1) one SBS base sheet in two (2) to two and one half (2 ½) gallons per square of cold applied membrane adhesive, 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.

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

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

E. Install base flashing ply to all perimeter and projection details.

F. Allow the one ply of base sheet to cure at least thirty minutes before installing the modified membrane.

3.5 MODIFIED MEMBRANE APPLICATION

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

B. The roll must push a puddle 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

(4) side laps and eight (8) end laps. The end laps shall be staggered. The modified membrane shall be laid in the same direction as the underlayers 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.

3.6 FLASHING MEMBRANE INSTALLATION

A. Metal Edge

1. Inspect the nailer to assure proper attachment and configuration.

2. Run one ply over the edge. Assure coverage of all wood nailers. Fasten plies with ring shank nails at eight (8) inches (203mm) o.c.

3. Install continuous cleat and fasten at six (6) inches (152mm) o.c.

4. Install new metal edge hooked to continuous cleat and set in bed of roof cement. Fasten flange to wood nailer every three (3) inches (76mm) o.c. staggered.

5. Prime metal edge at a rate of 100 square feet per gallon and allow to dry.

6. Strip in flange with base flashing ply covering entire flange in bitumen with six (6) inches.

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7. Install a second ply of modified flashing ply in bitumen over the base flashing ply, nine

(9) inches (228mm) on to the field of the roof. Seal outside edge with rubberized cement.

END OF SECTION 075200 – MODIFIED BITUMINOUS MEMBRANE ROOFING – COLD-

APPLIED

June 2013

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