MIA ATCT Water Intrusion Mitigation - Statement of Work - 24-10-27.docx

Statement of Work Water Intrusion Mitigation MIA ATCT and Base Building Miami, FL

1. STATEMENT OF WORK

The contractor shall furnish necessary equipment, materials, labor, tools, equipment, services, and supervision to perform the work described in this statement work, including caulking and sealing around the building roof, doors, windows, skylights, and in-between precast concrete panels at the Miami Airport Traffic Control Tower (ATCT). The MIA ATCT is located at 6400 NW 22nd St, Miami, FL 33122.

The project consists of the following tasks:

a) Pressure wash around the exterior of the Simulator Lab building. Remove and replace the sealant and backer rods (if applicable) around the exterior of the Simulator Lab building, including around penetrations, junction boxes and covers mounted to the outside of the building. The Simulator Lab building is a one story precast concrete structure at ground level just east of the ATCT. It has two sections joined together to form the Lab. See figures 2 & 4.

b) Remove and replace the door threshold on the north side of the Old Link structure. New threshold shall be installed in sealant bed. The Old Link structure is the corridor that connects the Base Building to the Old ATCT Lobby, on the east side of the base building. See Figures 2 & 5. Reseal the bottom row of glass on both the north & south sides, including the interface between curtain wall system (covers removed) and the concrete floor.

a. Threshold shall be Pemko 255X226_FGT or approved equal.

c) Remove flashing and termination bars on approximately 50 ft of flashing on the Old Link and Old ATCT roof. Refer to figures 2, 6 and 7. Clean all soiled areas on the TPO roofing membrane (Thermoplastic Polyolefin) and repair/patch all defective areas of existing membrane around the perimeter identified in figure 6. There may be a need for up to 20 TPO membrane patches of various sizes. Identify location and size of TPO patches in coordination with the FAA COR. Use same type membrane (reinforced vs. non-reinforced) and install patches according to manufacturer’s recommendations. Install new flashing and termination bars. Set the flashing and termination bars in continuous bedding bead of urethane sealant.

a. Use Multipart, Pourable Urethane Sealant for Use T: ASTM C 920; Type M; Grade P; Class 25; Uses T, M, A, and, as applicable to joint substrates indicated, O.

d) Seal the floor of HVAC Roof Top Unit three (RTU-3). See figure 8. Remove surface corrosion from the pan and treat it with an Epoxy Pan Sealant like DiversiTech’s Pan Patch or approved equal. See Appendix C for product data sheet.

e) Remove and replace the sealant around the two exterior windows on the first-floor east side of the building. See figure 9.

f) Remove and replace the sealant around the ATCT first floor emergency exit door the door and frame. See figure 10.

g) Remove and replace the sealant around the skylight panel assembly on the Base Building roof. Repair the skylight support curb by removing any trapped water under the roof membrane, mechanically attaching new 4” cant strips around the perimeter of the support curb, and covering them with TPO roofing membrane, including new termination bars and flashing as needed. Adhere new TPO membrane to existing roof membrane per manufacturer’s recommendation. See figure 11.

h) Sealants used for work under paragraphs a, b, d, e, and f shall be silicone based. Submit for approval.

i) Provide sealants, primers, backer rods, and other sealant accessories that comply with these requirements and with the applicable requirements in Appendix B – Joint Sealants.

2. SPECIAL REQUIREMENTS

1. Product Data - Prior to commencing any work, the contractor shall submit (Submittals) containing Product Data Sheets for each the Geotextile Fabric and the proposed riprap. for review and approval by the Contracting Officer (CO) or delegated representative, such as the COR.

2. Work plan and scheduling. – Prior to the Contracting Officer issuing the Notice To Proceed (NTP), the contractor shall submit for approval a work plan with a schedule of the work.

3. SITE ACCESS/CONSTRUCTION LIMITS

1. The contractor shall always maintain access for FAA employees through the facility. Closure of any areas affected by the work require prior approval and shall be coordinated through the FAA COR.

2. Demolition/Construction activities shall in no way interfere with FAA Operations. Extreme care shall be exercised so as not to cause any interference or interruption of service to this facility. It is mandatory that the contractor protects FAA personnel, vehicles and existing FAA communication, electrical and mechanical equipment both inside and outside of the building from damage caused by impact, water, debris, dust or odor. The contractor shall have the overall responsibility for the performance and enforcement of all forms of protection within the ATCT facility premises against any damages due to work performed under this contract. In addition to the submitted schedule, the contractor shall coordinate with the COR the location of work a minimum of 24 hours in advance and shall construct adequate barriers to ensure containment of debris associated with demolition/construction activities. If applicable, cordon off an adequate area expected to be worked the next day to ensure that no debris may cause damage to property or vehicles. Any damages incurred because of construction activity during the performance of this contract shall be repaired/replaced immediately by the contractor at no cost to the FAA.

3. Any work or activity that may impact the National Airspace System (NAS), such as work on critical equipment or circuits, will require coordination with the COR. The COR will prepare and submit a work or activity specific “Risk Assessment” for the facility’s review and approval. This process may take one week to complete. No contractor personnel may terminate or make any connections to existing power panels. Only FAA personnel shall make connections. Contractor shall advise the COR at least one day in advance when it is expected that access to power panels will be necessary to allow for coordination with local FAA specialists to be on site to make the terminations. The contractor personnel shall not operate any breakers in any existing FAA panel boards. NO ELECTRICAL TERMINATIONS SHALL BE MADE ON AN ENERGIZED CIRCUIT.

4. The contractor shall confine operations, activities, storage of materials and employee parking within the designated areas, as directed by the COR. Additional space the contractor deems necessary shall be obtained off site, at no additional cost to the Government.

5. Any damage to existing paving, lawns, curbs, sidewalks, and utilities caused by the contractor's activities shall be repaired immediately. Any damage to the building, interior or exterior, that are a result of the contractor’s activities shall be repaired. All costs of repairs shall be paid by the contractor. After notice to proceed and prior to the commencement of construction, the contractor and COR shall conduct joint inspections of the existing areas to be impacted by the construction. Existing damage or defects shall be noted and will be used as the basis for determination of damages caused by the contractor's operations.

6. It is strongly urged that the contractor carefully examine the premises to determine the extent of work and the conditions under which it must be done.

7. The Government reserves the right to enter the construction area at any time for work inspection and for the operation of the facility.

8. All work hours, shifts, and overtime work shall be coordinated with the COR. Before commencing construction, furnish to the COR a statement of hours per day and days per week to normally be worked and approximate number of persons on the job for a normal work shift. At the end of each workday, the contractor shall secure all construction areas. The contractor is responsible for the security of the staging area and shall provide the required measures at no additional expense to the government.

4. PERSONNEL

Contracting Officer - The term "Contracting Officer" (CO) as used herein denotes the person designated to act on behalf of the Government in the performance of this contract. Where reference is made to "Federal Aviation Administration" (FAA), "Resident Engineer" (RE), "Contracting Officer's Representative" (COR), or the like, this shall mean the Contracting Officer or his/her authorized representative.

Contractor Superintendence - In accordance with Contract Clause entitled SUPERINTENDENCE BY THE CONTRACTOR, the Contractor shall at all times during performance of this contract and until the work is completed and accepted, directly superintend the work or assign and have on site a competent superintendent with the authority to act for the Contractor.

The Contractor shall submit a Project Organizational Chart with the key personnel identified and their qualifications for the Government’s review and approval.

The contractor and his employees shall be subject to all rules and regulations relative to entering and leaving the FAA facility.

5. COORDINATION

The contractor shall comply with all applicable local, state, and federal codes.

All materials or workmanship or both which have been rejected by the COR by reasons of failure to conform to the requirements of the Contract Documents shall be removed and replaced with new, acceptable materials by the contractor at the contractor's own expense. Contractor shall also pay for testing of new materials which have been installed in place of rejected materials.

6. CONSTRUCTION SCHEDULE

The work plan and schedule prepared by the contractor shall consist of a logical narrative plan. Include construction activities, submittal and approval of materials, samples, and shop drawings (if applicable), the procurement of critical materials and equipment, fabrication of special materials and equipment.

Within fifteen (15) calendar days of contract award, the contractor shall submit the schedule and work plan. A Notice to Proceed will not be issued until the schedule is approved.

The Contractor shall participate in a review and evaluation of the proposed schedule with the Contracting Officer. Any revisions necessary as a result of the review shall be re-submitted for approval of the Contracting Officer within five (5) days after the conference. The approved schedule shall then be used by the contractor for planning, organizing, and directing work, reporting progress, and requesting payment for work accomplished. If the contractor, thereafter, desires to make changes in the schedule, the Contracting Officer shall be notified in writing, stating the reasons for the change. If the Contracting Officer considers the change to be of a major nature, the contractor may be required to revise the schedule and submit it for approval, without additional cost to the government.

7. SAFETY REQUIREMENTS

Contractor Responsibility

1. General Safety Provisions - The Contractor shall bear full responsibility to provide safe working conditions for its employees and Contractors. The Contractor shall not permit any employee or Subcontractor to work in surroundings or under working conditions that are unsanitary, hazardous, or dangerous to the health and safety of the employee.

2. Accident Prevention - The Contractor shall bear the responsibility of maintaining an accident prevention program such that frequent and regular inspections of the job site, materials and equipment are made by a competent person designated by the employer.

3. Use of Equipment - The Contractor shall not permit the use of any machinery, tool, material, or equipment that is not in compliance with OSHA regulations. The employer shall permit only those employees qualified by training and/or experience to operate equipment and machinery.

4. The FAA shall not be held responsible for safety inspections to ensure Contractor conformance with the OSHA safety regulations. The FAA, however, reserves the right to notify the Contractor of any deficiencies regarding worker safety.

5. The FAA will evaluate the Contractor on its safety performance, including that of its Subcontractors. The number and severity of safety and security violations will be considered in this evaluation. Contractor safety violations are cause for termination for default, may result in notification of the Contractor’s bonding company, and will affect the Contractor’s opportunity to propose on future work. Failure to correct such deficiencies may impact the Contractor’s ability to work on future FAA contracts.

OSHA Regulations The Contractor shall comply with the latest Occupational Safety and Health Administration regulations (CFR 29 Part 1926) regarding safety in the work area.

The Contractor shall be responsible for obtaining copies of non-FAA referenced documents without additional cost to the FAA. If Contractor requests a copy of FAA directives, they may be obtained by contacting the Contracting Officer.

The Contractor is not relieved from adhering to other OSHA requirements not listed herein. The Contractor shall consult the latest referenced OSHA documents for safety regulations.

Documents:

OSHA Documents:

8. CLEANUP

The contractor shall correct or repair any damage done during any part of this contract. Scrap and debris resulting from the project shall be removed from the site after each day’s work on site. All debris and generated waste shall require disposal in a manner that is not in conflict with local regulations.

9. SUPPLIES AND EQUIPMENT

The Contractor shall furnish all supplies and equipment as specified to accomplish the contract specifications.

SHIPPING AND RECEIVING MATERIAL. FAA shall not be responsible for shipping or receiving any material relating to this contract nor shall the contractor ship or otherwise receive any materials at the expense of the FAA.

PROTECTION OF MATERIAL. Contractor shall protect and maintain in like new condition all materials and supplies to be incorporated into this project and shall be responsible for their safe storage.

STORAGE OF MATERIALS. No storage area/space will be provided for contractor furnished equipment or supplies. Contractor may bring temporary storage on site for the duration of the project. Size and location of such shall be coordinated with the COR.

10. CONTACT/LOCATION INFORMATION

A. Location of Work:

FAA Miami ATCT 6400 NW 22nd St, Miami, FL 33122

B. FAA Point of Contact:

C. Pre-Bid Site Visit: All interested contractors are invited to view the site conditions prior to bidding. A site visit can be coordinated with the FAA Point of Contact. All expenses for the recommended site visit shall be the responsibility of the contractor. The U.S. Government shall not reimburse any expenses incurred for the purpose of soliciting bids for this contract.

11. ACCEPTANCE OF WORK

The FAA COR will conduct a Construction Acceptance Inspection at the completion of the project to ensure that all items of the contract have been fulfilled and that the site has been cleaned of debris.

APPENDIX A – PHOTOGRAPHS & DIAGRAMS

MIA ATCT

Figure 1. Aerial view of the west side of the Miami International Airport (MIA) with the location of the MIA ATCT.

Skylights (par 1.g.)

RTU-3 (par. 1.d.)

ATCT Emergency Door (par 1.f.)

Old Link (par 1.b. & 1.c.)

Simulator Lab Building (par 1.a.)

Two exterior windows in first floor east side (par 1.e.)

Figure 2. Aerial view of the MIA ATCT and Base Building from the north, identifying the work areas under this contract.

Skylights (par 1.f.)

Two exterior windows in first floor east side (par 1.e.)

Figure 3. Aerial view of the MIA Base Building as seen from the southeast.

Simulator Lab Building exterior

Covered Walkway to the Simulator Lab Building.

Figure 4. Photographs of the Simulation Lab Building. Remove and reseal all joints between concrete sections, the joints between the entrance canopy to Simulation Lab, and around all openings and exterior junction boxes.

Figure 5. Photographs of the Old Link structure. Replace the door threshold. Reseal the bottom row of glass on both the north & south sides, including the joint between curtain wall system (covers removed) and the concrete floor.

Item 2 - MIA Old Link Door Inside New Threshold and Re-Caulking Needed

Figure 6. View of the Old Link and Old ATCT roof. Replace and seal approximately 50 ft. of flashing on this roof, areas to replace are depicted in RED. Set the flashings in continuous bedding bead of urethane sealant.

Figure 7. Photographs of the Old Link roof and Old ATCT roof. Replace and seal approximately 50 ft. of flashing in this area.

Figure 8. Photographs of RTU-3. Water leaks through the corroded metal pan at the bottom of the unit. Contractor shall remove surface corrosion from the pan and treat it with an Epoxy Pan Sealant like DiversiTech’s Pan Patch or approved equal. See Appendix C for product data sheet.

Figure 9. Interior view of one of the two windows on the first floor east side that need to be resealed.

Figure 10. MIA ATCT Emergency Exit Door. Remove and replace all sealant around the door frame.

Remove and replace all sealant around the skylight panel assembly.

Remove trapped water under the membrane around the support curb

Install 4” cant strip around the support curb

Figure 11. Photographs of the skylights on the southeast part of the Base Building roof. Remove and replace all the sealant around the skylight panels; between the glass and the metal frame, and between the metal frame and the curb. Install cant strips around the support curb, mechanically attached to the structure. Install new TPO roofing membrane over the cant strip, and properly adhere to the existing roof membrane.

APPENDIX B – JOINT SEALANT SPECIFICIATIONS

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes low-VOC and Low-Odor joint sealants for the following locations:

1. Interior joints in vertical surfaces.

a. Perimeter joints between interior wall surfaces and frames of interior doors.

b. Tile wall and floor joints.

c. Perimeter joints between existing exterior metal siding, and louver and window unit systems.

d. Other joints as indicated.

1.2 SYSTEM PERFORMANCE REQUIREMENTS

A. Provide elastomeric joint sealants that have been produced and installed to establish and to maintain watertight and airtight continuous seals without causing staining or deterioration of joint substrates.

B. Provide joint sealants for interior applications that have been produced and installed to establish and maintain airtight continuous seals that are water resistant and cause no staining or deterioration of joint substrates.

C. Provide products that will not produce off-gassing of VOC’s after product is installed and properly cured.

1.3 SUBMITTALS

A. Product data from manufacturers for each joint sealant product required.

1. Certification by joint sealant manufacturer that sealants plus the primers and cleaners required for sealant installation comply with local regulations controlling use of volatile organic compounds.

2. Provide Safety Data Sheets (SDS) for the following:

a. Elastomeric joint sealants

b. Primer.

c. Cleaners for nonporous surfaces.

B. Samples for initial selection purposes in form of manufacturer's standard bead samples, consisting of strips of actual products showing full range of colors available, for each product exposed to view.

C. Certificates from manufacturers of joint sealants attesting that their products comply with specification requirements and are suitable for the use indicated.

D. Qualification data complying with requirements specified in "QUALITY ASSURANCE" article. Include list of completed projects with project names addresses, names of architects and owners, plus other information specified.

E. Compatibility and adhesion test reports from elastomeric sealant manufacturer indicating that materials forming joint substrates and joint sealant backings have been tested for compatibility and adhesion with joint sealants. Include sealant manufacturer's interpretation of test results relative to sealant performance and recommendations for primers and substrate preparation needed to obtain adhesion.

F. Product test reports for each type of joint sealants indicated, evidencing compliance with requirements specified.

G. Preconstruction field test reports, indicating which products and joint preparation methods demonstrate acceptable adhesion to joint substrates.

H. Refer to Section “OPERATION AND MAINTENANCE DATA”.

1.4 QUALITY ASSURANCE

A. Installer Qualifications: Engage an experienced Installer who has completed joint sealant applications similar in material, design, and extent to that indicated for Project that have resulted in construction with a record of successful in-service performance.

B. Single Source Responsibility for Joint Sealant Materials: Obtain joint sealants and joint backer materials from a single manufacturer for each different product required.

C. Conduct Testing: Provide comprehensive test data for each type of joint sealant based on tests conducted by a qualified independent testing laboratory on current product formulations within a 24-month period preceding date of Contractor's submittal of test results to COR.

1. Test elastomeric sealants for compliance with requirements specified by reference to ASTM C920. Include test results for hardness, stain resistance, adhesion and cohesion under cyclic movement (per ASTM C719), low-temperature flexibility, modulus of elasticity at 100 percent strain, effects of heat aging, and effects of accelerated weathering.

2. Include test results performed on joint sealants after they have cured for 1 year.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials to Project site in original unopened containers or bundles with labels indicating manufacturer, product name and designation, color, expiration period for use, pot life, curing time, and mixing instructions for multi-component materials.

B. Store and handle materials in compliance with manufacturer's recommendations to prevent their deterioration or damage due to moisture, high or low temperatures, contaminants, or other causes.

1.6 PROJECT CONDITIONS

A. Environmental Conditions: Do not proceed with installation of joint sealants under the following conditions:

1. When ambient and substrate temperature conditions are outside the limits permitted by joint sealant manufacturer or below 40 deg F.

2. When joint substrates are wet.

B. Joint Width Conditions: Do not proceed with installation of joint sealants where joint widths are less than allowed by joint sealant manufacturer for application indicated.

C. Joint Substrate Conditions: Do not proceed with installation of joint sealants until contaminants capable of interfering with their adhesion are removed from joint substrates.

1.7 SEQUENCING AND SCHEDULING

A. Sequence installation of joint sealants to occur not less than 21 nor more than 30 calendar days after completion of waterproofing, unless otherwise indicated.

PART 2 - PRODUCTS

2.1 MATERIALS, GENERAL

A. Compatibility: Provide joint sealants, joint fillers, and other related materials that are compatible with one another and with joint substrates under conditions of service and application, as demonstrated by sealant manufacturer based on testing and field experience.

B. Provide sealant that has been tested and found suitable for the substrates to which it will be applied.

C. VOC Content of Interior Sealants: Provide sealants and sealant primers for use inside the weatherproofing system that comply with the following limits for VOC content when calculated according to 40 CFR 59, Part 59, Subpart D (EPA Method 24):

1. Architectural Sealants: 250 g/L.

2. Sealant Primers for Nonporous Substrates: 250 g/L.

3. Sealant Primers for Porous Substrates: 775 g/L.

D. Interior Sealant. ASTM C 834, ASTM C 920, Type S or M, Grade NS, Class 12.5, Use NT.

E. Exterior Sealant. For joints in vertical surfaces, provide ASTM C 920, Type S or M, Grade NS, Class 25, Use NT. For joints in horizontal surfaces, provide ASTM C 920, Type S or M, Grade P, Class 25, Use T.

F. Floor Joint Sealant. ASTM C 920, Type S or M, Grade P, Class 25, Use T.

G. Colors: Provide selections made by COR from manufacturer's full range of standard colors for typical applications.

H. Provide VOC-compliant sealants. Products must not produce off-gassing after proper curing is achieved.

2.2 ELASTOMERIC JOINT SEALANTS

A. Elastomeric Sealant Standard: Provide manufacturer's standard chemically curing elastomeric sealants that comply with ASTM C 920.

B. Neutral-curing silicone as follows:

1. VOC Content: 0 g/L or 0 lbs. Per gallon less water and exempt solvents.

2. Type: Type S (ASTM C 920).

3. Grade NS (ASTM C 920).

4. Class: 25 (ASTM C 920).

5. Use: NT, A and M.

6. Shore A Hardness: 30 (ASTM D 2240)

7. Joint Movement Capability (after 14 cure days): Extension: 25%. Compression: 25%.

8. Tear Resistance: 18pli (ASTM D 624).

9. Elongation at Break: 320 percent (ASTM D 412).

10. Tensile Strength: 275psi (ASTM D 412).

11. Uses Related to Joint Substrates. Expansion and control joints in concrete and masonry; metal curtain walls, perimeter caulking of windows; conventional glazing. Adheres to metal, aluminum, galvanized steel, concrete and masonry. For exterior applications.

C. Available Products: Including but not limited to the following:

a. GE Construction Sealants; Momentive Performance Materials Inc. 9930 Kincey Ave., Huntersville, NC 28078

b. Dow Corning Corporation, 2200W. Salzburg Street. Midland MI 48686-0994

c. Sherwin-Williams 5501 Cass Avenue, Cleveland, Ohio 44101

d. BASF Corporation, Construction Systems, 889 Valley Park Drive, Shakopee, MN 55379 D. Multi-purpose mildew-resistant silicone sealant:

1. VOC Content: 0 g/L or 0 lbs. per gallon less water and exempt solvents.

2. Type: Type S (ASTM C 920).

3. Grade NS (ASTM C 920).

4. Class: 25 (ASTM C 920).

5. Use: NT, G and A.

6. Shore A Hardness: 25 (ASTM C 661).

7. Ultimate Elongation: 425 percent (ASTM D 412)

8. Tensile Strength, psi: 330 (ASTM D 412)

10. Movement Capability: 25 (ASTM C 719).

11. Extrusion Rate: 350 g/min.

12. Use Related to Exposure: NT (non-traffic).

13. Uses Related to Joint Substrates: Glass, Aluminum, Tile, Fiberglass, Countertops, Nonstructural glazing. For interior and exterior applications.

D. Low-Modulus, high-movement, fast-curing sealant:

1. VOC Content: 2.07 g/L or 0.02 lbs. per gallon. Complies with low-VOC regulations.

2. Type: S (ASTM C 920).

3. Grade: NS (ASTM C 290).

4. Class: 25 (ASTM C 290).

5. Use: NT, M, A, G and O.

6. Tensile Strength: 290 psi (ASTM D 412).

7. Ultimate Elongation at Break: 865 percent (ASTM D 412).

8. Hardness, Shore A: 20 (ASTM C 661).

9. Tear Strength: 70 lb/in (ASTM D 1004).

10. Use: Glass, aluminum, concrete, masonry, wood, stone, curtain wall construction, expansion wall joints. Interior and exterior use. Do not use on horizontal traffic-bearing surfaces.

2.3 ELECTRICAL CONDUIT DUCT SEAL

A. Expandable foam duct sealant kits to prevent water and gas from entering manholes, vaults, or structures from electrical conduits.

1. Seal all conduits that are underground, and conduits that run outside of structure.

B. Manufacturer: 3M “Scotchcast 4416 Duct Sealing Kit” or equal.

2.4 JOINT SEALANT BACKING

A. General: Provide sealant backings of material and type that are non-staining; are compatible with joint substrates, sealants, primers and other joint fillers; and are approved for applications indicated by sealant manufacturer based on field experience and laboratory testing. Provide backing and filler material by sealant manufacturer to greatest extent possible, or products recommended by sealant manufacturer.

B. Plastic Foam Joint Fillers: Preformed, compressible, resilient, non-staining, non-waxing, non- extruding strips of flexible plastic foam of material indicated below and of size, shape, and density to control sealant depth and otherwise contribute to producing optimum sealant performance:

1. Filler shall be 25 to 33 percent oversize for closed cell and 40 to 50 percent oversize for open cell material, unless otherwise indicated. Filler material shall be compatible with sealant.

2. Open-cell polyurethane foam.

3. Closed-cell polyethylene foam, nonabsorbent to liquid water and gas, non-outgassing in unruptured state.

C. Bond-Breaker Tape: Polyethylene tape or other plastic tape as recommended by sealant manufacturer for preventing sealant from adhering to rigid, inflexible joint filler materials or joint surfaces at back of joint where such adhesion would result in sealant failure. Provide self-adhesive tape where applicable.

2.5 MISCELLANEOUS MATERIALS

A. Primer: Material recommended by joint sealant manufacturer where required for adhesion of sealant to joint substrates indicated, as determined from preconstruction joint sealant-substrate tests and field tests.

B. Cleaners for Nonporous Surfaces: Chemical cleaners acceptable to manufacturers of sealants and sealant backing materials, free of oily residues or other substances capable of staining or harming in any way joint substrates and adjacent nonporous surfaces, and formulated to promote optimum adhesion of sealants with joint substrates.

C. Masking Tape: Non-staining, nonabsorbent material compatible with joint sealants and surfaces adjacent to joints.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine joints indicated to receive joint sealants, with Installer present, for compliance with requirements for joint configuration, installation tolerances, and other conditions affecting joint sealant performance. Do not proceed with installation of joint sealants until unsatisfactory conditions have been corrected.

3.2 PREPARATION

A. Surface Cleaning of Joints: Clean out joints immediately before installing joint sealants to comply with recommendations of joint sealant manufacturer and the following requirements:

1. Remove all foreign material from joint substrates that could interfere with adhesion of joint sealant, including dust, paints (except for permanent, protective coatings tested and approved for sealant adhesion and compatibility by sealant manufacturer), old joint sealants, oil, grease, waterproofing, water repellents, water, surface dirt, and frost.

2. Clean concrete, masonry, unglazed surfaces of ceramic tile, and similar porous joint substrate surfaces by brushing, grinding, blast cleaning, mechanical abrading, or a combination of these methods to produce a clean, sound substrate capable of developing optimum bond with joint sealants. Remove loose particles remaining from above cleaning operations by vacuuming or blowing out joints with oil-free compressed air.

3. Clean metal, glass and other nonporous surfaces with chemical cleaners or other means that do not stain, harm substrates, or leave residues capable of interfering with adhesion of joint sealants.

B. Joint Priming: Prime joint substrates where indicated or where recommended by joint sealant manufacturer based on preconstruction joint sealant-substrate tests or prior experience. Apply primer to comply with joint sealant manufacturer's recommendations. Confine primers to areas of joint sealant bond; do not allow spillage or migration onto adjoining surfaces.

C. Masking Tape: Use masking tape where required to prevent contact of sealant with adjoining surfaces that otherwise would be permanently stained or damaged by such contact or by cleaning methods required to remove sealant smears. Remove tape immediately after tooling without disturbing joint seal.

3.3 INSTALLATION OF JOINT SEALANTS

A. General: Comply with joint sealant manufacturer's printed installation instructions applicable to products and applications indicated, except where more stringent requirements apply.

B. Sealant Installation Standard: Comply with recommendations of ASTM C 1193 for use of joint sealants as applicable to materials, applications, and conditions indicated.

C. Installation of Sealant Backings: Install sealant backings to comply with the following requirements:

1. Install joint fillers of type indicated to provide support of sealants during application and at position required to produce the cross-sectional shapes and depths of installed sealants relative to joint widths that allow optimum sealant movement capability.

a. Do not leave gaps between ends of joint fillers.

b. Do not stretch, twist, puncture, or tear joint fillers.

c. Remove absorbent joint fillers that have become wet prior to sealant application and replace with dry material.

2. Install bond breaker tape between sealants where backer rods are not used between sealants and joint fillers or back of joints.

D. Installation of Sealants: Install sealants by proven techniques that result in sealants directly contacting and fully wetting joint substrates, completely filling recesses provided for each joint configuration, and providing uniform, cross-sectional shapes and depths relative to joint widths that allow optimum sealant movement capability. Install sealants at the same time sealant backings are installed.

E. Tooling of Non-sag Sealants: Immediately after sealant application and prior to time skinning or curing begins, tool sealants to form smooth, uniform beads of configuration indicated, to eliminate air pockets, and to ensure contact and adhesion of sealant with sides of joint. Remove excess sealants from surfaces adjacent to joint. Do not use tooling agents that discolor sealants or adjacent surfaces or are not approved by sealant manufacturer.

1. Provide concave joint configuration per Figure 5A in ASTM C1193, unless otherwise indicated.

2. Use masking tape to protect adjacent surfaces of recessed tooled joints.

3.4 CLEANING

A. Clean off excess sealants or sealant smears adjacent to joints as work progresses by methods and with cleaning materials approved by manufacturers of joint sealants and of products in which joints occur.

3.5 PROTECTION

A. Protect joint sealants during and after curing period from contact with contaminating substances or from damage resulting from construction operations or other causes so that they are without deterioration or damage at time of Substantial Completion. If, despite such protection, damage or deterioration occurs, cut out and remove damaged or deteriorated joint sealants immediately so that installations with repaired areas are indistinguishable from original work.

APPENDIX C – EPOXY JOINT SEALANT SPECIFICIATIONS

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