AIR TRAFFIC ORGANIZATION

COMBINED SCOPE OF WORK AND SPECIFICATIONS PACKAGE

AIR TRAFFIC CONTROL TOWER WATERPROOFING & EXTERIOR RESTORATION

PROJECTS

Jacksonville International ATCT (JAX)

Craig Executive ATCT (CRG) Gainesville Regional ATCT (GNV)

Prepared For Federal Aviation Administration (FAA) Project Type Waterproofing / Exterior Restoration Included Facilities JAX ATCT / CRG ATCT / GNV ATCT Program OPS Sustainment Document Status Issue for Bid / Contractor Use Revision Rev.1 Date 5/21/2026

Table of Contents Statement of Work

JAX ATCT- Jacksonville, FL

CRG ATCT- Jacksonville, FL

GNV ATCT- Gainesville, FL

Combined Specifications

Statement of Work (SOW) Air Traffic Control Tower (ATCT) Cab Waterproofing Repairs

Location: Jacksonville ATCT, Jacksonville, FL 14400 Whirlwind Ave. Jacksonville, FL 32229

Federal Aviation Administration (FAA) April 13, 2026

1. Objective

The purpose of this project is to eliminate water intrusion at the Air Traffic Control Tower (ATCT) cab level by repairing failed sealants at the coping joints above the cab glass, at the cab roof, and around the exterior of the cab. After replacing the failed sealants, applying a continuous exterior paint/waterproofing system.

The Contractor must provide all labor, materials, equipment, and supervision necessary to perform exterior restoration and waterproofing work on the Air Traffic Control Tower (ATCT) cab and roof areas at Jacksonville International Airport.

2. Scope of Work

2.1 Investigation and Preparation

• Perform a visual inspection of the ATCT cab exterior, focusing on:

o Coping joints above cab glazing o Existing sealant conditions o Any visible cracks, separations, or voids o Contractor must catalogue surface substrates to ensure product selection compatibility

• Identify all areas where coping has separated or sealant has failed, noting the areas on the cab glass that appear to have active leaks.

• Document conditions prior to repair.

2.2 Coping Joint Repairs

• Remove all failed, cracked, or deteriorated sealant at coping joints above the cab glass.

• Clean and prepare joint surfaces in accordance with manufacturer recommendations.

• Install appropriate backer rod to ensure proper joint depth and geometry.

• Apply sealant such as NP-1 or FAA-approved equal per specifications:

o Tool sealant to achieve a watertight seal.

o Ensure full adhesion and continuity of seal.

• Seal all identified gaps to prevent water intrusion.

2.3 Additional Sealant Repairs

• Inspect entire cab exterior, cab roof, and parapet for additional failing sealant.

• Remove and replace deteriorated sealant at:

o Panel joints o Window perimeters (exterior only) o Any penetrations or transitions o Fasteners

• Use industrial grade, compatible sealant materials suitable for the substrate and environmental exposure.

2.4 Exterior Waterproofing Coating

• After sealant repairs are complete:

o Clean all exterior surfaces to remove dirt, debris, and contaminants.

o Prepare surfaces per coating manufacturer requirements.

• Apply a waterproofing epoxy or elastomeric coating system to the exterior cab and catwalk surfaces per specifications:

o Product must be suitable for exterior, high-exposure environments.

o Coating must be compatible with existing substrates and sealants.

o Apply per manufacturer’s specified thickness and curing requirements.

• All products shall be designated Low-VOC (less that 50g/L) due to occupied facility conditions.

• Care should be taken not to coat lightning protection system with any residue from primer, paint, or sealants.

• Product should be rated for both horizontal and vertical installation

• Color to match existing as closely as possible. Submit color sample for facility approval.

3. Safety and Access Requirements

3.1 Work at Height

• All work will occur at approximately 120 feet above grade.

• Contractor must provide:

o Engineered access system (e.g., man lift, swing stage, or scaffolding) o Fall protection systems compliant with OSHA standards

3.2 Lift Plan

• Submit a detailed Lift Plan for approval prior to mobilization, including:

o Equipment specifications o Setup locations o Load calculations o Crane or lift reach diagrams (if applicable)

3.3 Safety Plan

• Submit a Site-Specific Safety Plan (SSSP) including:

o Fall protection o Rescue plan o Hazard analysis o Night work safety procedures (if applicable)

3.4 FAA Coordination

• Coordinate all work activities with FAA personnel, including:

o Equipment staging areas o Site access o Work sequencing and schedule

• Obtain approval prior to mobilization.

3.5 FAA Form 7460

• Contractor must be responsible for obtaining approval via Federal Aviation Administration Form 7460 (Notice of Proposed Construction or Alteration) for any equipment impacting navigable airspace.

• Work shall not commence until approval is received.

4. Work Hours

• Due to operational constraints, work is anticipated to occur during nighttime hours (2300-0600).

• Contractor must:

o Coordinate schedule with FAA o Provide adequate lighting that does not interfere with ATCT operations

5. Submittals

Contractor must submit the following for approval:

• Product data sheets (sealants and coatings)

• SDS for all products must be approved prior to work start. Any product on site without an approved SDS will be rejected by the COR.

• Lift Plan

• Site-Specific Safety Plan (SSSP)

• FAA Form 7460 approval documentation

• Work schedule and phasing plan

• Any material that does not have an approved SDS will be rejected by FAA

COR

6. Quality Control

• All work must be performed in accordance with:

o Manufacturer recommendations o Industry best practices

• Ensure all sealed joints are watertight and continuous.

• Coating shall be free of:

o Runs o Voids o Pinholes o Incomplete coverage

7. Site Visit Requirement

• Bidders are strongly encouraged to visit the project site prior to submitting a proposal. By submitting a bid, the Contractor acknowledges that they have either visited the site or otherwise fully informed themselves of the existing conditions.

• No additional compensation or consideration will be provided for failure to understand the scope, site conditions, or project dimensions due to not conducting a site visit.

7. Closeout Requirements

• Final inspection with FAA representatives

• Provide:

o Warranty information for sealants and coatings o Product data and maintenance recommendations

8. Contractor Qualifications

• Contractor must demonstrate:

o Experience with high-elevation exterior façade work o Experience working on active FAA or aviation facilities (preferred) o Trained personnel for fall protection and aerial lift operations

9. Photos

Figure 1.) Coping at Parapet (Tight Installation)

Figure 2.) Coping at Parapet (Peeled Away)

Figure 3.) Cab Glass and Metal Surfaces to Refinish/Seal

Figure 4.) Metal Surfaece to Refinish/Seal

Figure 5.) Additional Metal Surfaces to Seal/Paint

ATCT Cab Roof and Exterior Restoration

Location: Craig Executive Airport ATCT

9550 Craig Airport Rd, Jacksonville, FL 32225

April 24, 2026

1.0 GENERAL DESCRIPTION

The Contractor must provide all labor, materials, equipment, and supervision necessary to perform exterior restoration and waterproofing work on the Air Traffic Control Tower (ATCT) cab and roof areas at Craig Executive Airport.

Work shall include removal of deteriorated sealants, treatment of corrosion, roof membrane repairs, and application of a waterproofing coating/paint system. All work must be coordinated with the Federal Aviation Administration (FAA) and performed in accordance with applicable safety and operational requirements.

Period of Performance: 30 days

2.0 SCOPE OF WORK

2.1 Surface Preparation and Rust Treatment

1. Contractor must mechanically grind and remove all existing sealants, failed coatings, and visible corrosion from the catwalk level, including the metal flashing immediately below, and all surfaces above.

2. Areas exhibiting rust must be cleaned to a sound substrate using mechanical means (wire brushing, grinding, etc.).

3. Following preparation, all rusted areas must be treated with a rust converter/neutralizer such as Ospho or approved equal.

4. Ensure all treated surfaces are fully cured and prepared in accordance with manufacturer recommendations prior to coating application.

2.2 Cab Roof Walkway Pad Removal and Repair

1. Carefully remove the existing walkway pad located on the cab roof that has had a core sample taken from the center.

2. Inspect substrate and seams beneath the walkway pad

3. Clean and dry all exposed surfaces.

4. Retape and reinforce all seams beneath the pad using compatible roofing tape materials per manufacturer standards.

5. For ease of future monitoring of leaks, do not reinstall walkway pad.

2.3 Waterproofing Coating Application

1. Contractor must apply a continuous waterproofing membrane coating system per specifications to all surfaces from the catwalk level upward, including the cab exterior and parapet wall surfaces (excluding glazing).

2. This includes the coping/flashing that is located directly below the catwalk all the way to the top rail above the catwalk.

3. Example Acceptable systems include (or approved equal):

- Tremco Vulkem 350/351 System

- Sika Sikalastic 560

- Sherwin-Williams ConFlex XL

4. Coating system must:

a. Be elastomeric and capable of bridging minor cracks

b. Provide UV resistance and long-term weather protection

c. Be compatible with previously treated and prepared substrates

d. Meet low-VOC requirements

e. Be compatible with both vertical and horizontal installation without running

5. Apply coating in strict accordance with manufacturer specifications, including required surface prep, primer (if required), and minimum thickness.

2.4 Sealant Replacement

1. Remove and replace all deteriorated, cracked, or failed sealants in the work area per specifications

2. Apply new sealant at:

a. All joints

b. Transitions between dissimilar materials

c. Around penetrations and fixtures

d. Any additional locations where sealant failure is observed

e. Sealant must be polyurethane-based (e.g., NP-1 or approved equal) and compatible with the coating system.

3. Care should be taken not to block any weepholes

2.5 Catwalk Door Frame Repair

1. Mechanically remove any remaining rust and apply rust neutralizer

2. Apply filler and sealant as necessary in order to recreate a solid, rust free surface

3. Install new watertight seals around the door

4. Prime and paint per specifications to match the other work

3.0 SAFETY AND ACCESS REQUIREMENTS

1. Work shall occur at elevations of approximately 60 feet above grade.

2. Contractor must provide all necessary fall protection systems, scaffolding, or lifts required to safely access the work area.

3. A site-specific Safety Plan and Fall Protection Plan must be submitted and approved prior to commencement of work.

4. A Lift Plan must be required if aerial equipment is utilized.

5. FAA Form 7460 must be filed with the FAA for any equipment located adjacent to the tower. No work shall proceed until this form has been reviewed and approved.

4.0 FAA COORDINATION AND OPERATIONAL REQUIREMENTS

1. All work must be coordinated in advance with FAA personnel.

2. Contractor must submit a detailed Work Plan and Schedule for approval prior to mobilization.

3. Due to operational constraints, work is anticipated to occur during nighttime hours.

a. Monday-Friday (2301-0559)

b. Saturday-Sunday (2201-0669)

4. Contractor must comply with all FAA security, access, and operational requirements.

5.0 SUBMITTALS

1. Contractor must provide the following for approval prior to beginning work:

a. Product data sheets for all coatings, sealants, and repair materials

b. Safety Plan and Fall Protection Plan

c. Lift Plan (if applicable)

d. Work schedule and phasing plan

e. SDS for all products must be approved prior to work start. Any product on site without an approved SDS will be rejected by the

COR.

6.0 QUALITY CONTROL

1. All work must be performed by qualified personnel experienced in waterproofing and exterior restoration.

2. Installation must follow manufacturer requirements and industry best practices

3. Contractor must ensure all surfaces are properly prepared prior to application of coatings or sealants.

4. Any dumpster on site must be covered in order to prevent Flying Object Debris (FOD) from entering the airfield.

7.0 CLEANUP AND CLOSEOUT

1. Contractor must maintain a clean and orderly work area at all times.

2. All debris and removed materials must be disposed of in accordance with applicable regulations.

3. Upon completion, all surfaces must be left in a neat, sealed, and watertight condition.

8.0 Photos

Figure 1.) Deterioration at Catwalk Door Frame

Figure 2.) Rusting/Pitting below Catwalk

Figure 3.) Significant Corrosion above Guard Rail

Figure 4.) Walkway Pad with Suspected Leak

Figure 5.) Corrosion at Guard Rail

Figure 6.) Corrosion near Cab Glass

Figure 7.) Cossion Near Cab Glass

Figure 8.) Cab View from Ground Level

End of Document.

Project Title: ATCT Cab and Base Building Exterior Restoration

Location: Gainesville ATCT Gainesville Regional Airport

3880 NE 39th Ave Gainesville, FL 32609

April 24, 2026

1.0 GENERAL DESCRIPTION

The Contractor shall provide all labor, materials, equipment, and supervision necessary to perform exterior restoration and waterproofing work on the Air Traffic Control Tower (ATCT) cab and roof areas at Gainesville.

Work shall include removal of deteriorated sealants, treatment of corrosion, roof membrane repairs, interior localized repairs, and application of waterproofing coating systems on both the cab roof and the base building roof. All work shall be coordinated with the Federal Aviation Administration (FAA) and performed in accordance with applicable safety and operational requirements.

The period of performance is 30 days.

2.0 SCOPE OF WORK

2.1 Surface Preparation and Rust Treatment

1. Contractor must grind and remove all existing sealants, failed coatings, and visible corrosion from the catwalk level and all surfaces above.

2. Areas exhibiting rust must be cleaned to a sound substrate using mechanical means (wire brushing, grinding, etc.).

3. In areas with large amounts (> ¼ inch) of base material missing due to corrosion, additional metal of matching type and thickness must be installed, sealed, and painted per specifications.

4. Following preparation, all rusted areas must be treated with a rust converter/neutralizer such as Ospho or approved equal.

5. Ensure all treated surfaces are fully cured and prepared in accordance with manufacturer recommendations prior to coating application.

6. Roof must be clean and free of all small debris and particles prior to coating application.

2.3 Paint/Waterproofing and Roof Coating Application

1. Contractor must apply a continuous waterproofing membrane paint/coating system per specifications to all vertical and horizontal exterior surfaces from the catwalk level upward, including the cab exterior (excluding glazing) and the flashing immediately below the catwalk.

a. Product must be matte, non-reflective finish

b. This applies to metal surfaces only, not the white vertical siding immediately below the cab glass.

c. Color to match existing as closely as possible

a. Color sample to be submitted to FAA for review

2. In addition, the cab roof shall be coated with a high-quality silicone roof coating system

a. Roof coating shall be low VOC compliant.

b. As this will be applied above operational areas, preference will be given to products designated as “odorless” or “low odor”.

c. Product must be at least 95% solids and UV resistant.

d. Silicone roofing system must be of a finished thickness and quality to obtain a manufacturer’s 20 year warranty.

e. As silicone roof coatings form a slippery finished surface, provide walkway pads to access HVAC equipment and antennas located around the parapet wall.

f. Apply bleed blocking primer as required by manufacturer

g. To confirm proper adhesion and warranty, perform pull tests per

ASTM standards and as directed by manufacturer.

3. Metal coating systems shall:

a. Be elastomeric and capable of bridging minor cracks

b. Provide UV resistance and long-term weather protection

c. Be compatible with previously treated and prepared substrates

d. Meet low-VOC requirements where feasible

4. Apply all coatings in strict accordance with manufacturer specifications, including required surface prep, primer (if required), and minimum thickness.

5. Access hatch to cab roof shall be prepped, primed, and coated with same coating as the other metal sections of the cab.

2.4 Sealant Replacement

1. Remove and replace all deteriorated, cracked, or failed sealants in the work area.

2. Apply new sealant at:

a. All joints

b. Transitions between dissimilar materials

c. Around penetrations and fixtures

d. Any additional locations where sealant failure is observed

e. Sealant shall be polyurethane-based (e.g., NP-1 or approved equal) and compatible with the coating system.

2.5 Interior Rust Repair and Finishing

1. Contractor must identify all locations inside the cab where prior repairs have been made using filler or putty materials over rusted steel or metal components

2. Remove any loose or improperly adhered filler material and prepare the underlying substrate.

3. Mechanically clean any remaining corrosion to a sound surface.

4. Apply rust inhibitor/primer to all exposed metal.

5. Reapply appropriate filler material to restore surface profile where necessary.

6. Sand and finish repaired areas to a smooth condition suitable for coating.

7. Apply finish paint system to match existing interior finishes as closely as possible.

2.6 Catwalk Door Seal Repair

1. Inspect and repair the seal at the catwalk access door

2. Remove existing failed weatherstripping and sealant materials.

3. Install new weather-tight sealing system to prevent air and water intrusion.

4. Ensure door operates properly and seals uniformly along all edges.

5. Grind off any visible surface rust from door and frame.

6. Treat rust spots with Ospho rust neutralizer or approved equal.

7. Paint door and frame with industrial grade, low VOC paint and primer to match existing.

2.7 Vinyl Siding Repair

1. Repair damaged section of vinyl siding located below the catwalk.

2. Replace damaged panels with new material of similar color, profile, and thickness.

3. Apply sealant as needed to ensure installation is weather-tight and consistent with existing siding system.

2.8 Base Building Repairs

1. Pressure wash roof of base building and link.

2. Remove lightning protection and protect for reinstallation

3. Coat roof with liquid applied silicone membrane and primer per manufacturer’s recommendations.

4. Roof coating system should be of a thickness and quality (at least 95% solids) to obtain a manufacturer’s 20 year warranty.

5. Reinstall lightning protection system on roof in exact configuration as it was previously installed

6. Replace sealant at vertical gaps and around windows in metal seam building.

3.0 SAFETY AND ACCESS REQUIREMENTS

1. Work shall occur at elevations of approximately 60 feet above grade

2. Contractor must provide all necessary fall protection systems, scaffolding, or lifts required to safely access the work area.

3. A site-specific Safety Plan and Fall Protection Plan must be submitted and approved prior to commencement of work.

4. A Lift Plan must be required if aerial equipment is utilized.

4.0 FAA COORDINATION AND OPERATIONAL REQUIREMENTS

1. All work must be coordinated in advance with FAA personnel.

2. It is anticipated that all work from the catwalk level up will have to be completed at night during the non-operational hours of the tower from 2230-0645 Local.

a. Additionally, any work below the catwalk level that could cause noise disturbances or off-putting odors inside the ATCT should be planned for night work as well.

3. Contractor must submit a detailed Work Plan and Schedule for approval prior to mobilization.

4. Contractor must comply with all FAA security, access, and operational requirements.

5. Site access is through FAA gate. No Airport fence access required.

6. Contractor must provide temporary restroom facilities.

5.0 SITE VISIT REQUIREMENT

1. Bidders are strongly encouraged to visit the project site prior to submitting a proposal.

2. By submitting a bid, the Contractor acknowledges that they have either visited the site or otherwise fully informed themselves of the existing conditions.

3. No additional compensation or consideration will be provided for failure to understand the scope, site conditions, or project dimensions due to not conducting a site visit.

6.0 SUBMITTALS

1. Contractor must provide the following for approval prior to beginning work:

a. Product data sheets for all coatings, sealants, and repair materials

b. Safety Plan and Fall Protection Pla

c. Lift Plan (if applicable)

d. Work schedule and phasing plan

e. Core sample documentation and findings (post-removal)

f. SDS for all products must be approved prior to work start. Any product on site without an approved SDS will be rejected by the COR.

2. Vinyl siding material selection

7.0 QUALITY CONTROL

1. All work must be performed by qualified personnel experienced in waterproofing and exterior restoration.

2. Installation must follow manufacturer requirements and industry best practices.

3. Contractor must ensure all surfaces are properly prepared prior to application of coatings or sealants.

4. Contractor must ensure that roof drains are clean and free flowing prior to work start.

8.0 CLEANUP AND CLOSEOUT

1. Contractor must maintain a clean and orderly work area at all times.

2. All debris and removed materials must be disposed of in accordance with applicable regulations.

3. Upon completion, all surfaces must be left in a neat, sealed, and watertight condition.

9.0 Site Photos

Figure 1. Cab Roof

Figure 2. Window Sealant

Figure 3. Base Building roof

Figure 4. Base Building Roof Lightning Protection

Figure 5. Interior Corrosion

Figure 6. Cab Roof Guard Rail

Figure 7. Catwalk Door Corrosion

Figure 8. Metal Panels Above Cab Glass

Figure 9. Metal Flashing and Vinyl Siding Damage

Figure 10. Cab Roof Hatch

Specifications

SECTION 07 92 00 - JOINT SEALANTS

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes joint sealants for the following locations:

1. Exterior joints:

2. Window sealants.

3. Perimeter joints between existing exterior aluminum panels, mullions, louvers and window unit systems adjoining concrete, masonry, metal frames or flashing components.

4. Cab Glass Window Sealant

5. Field spray water testing for joints

1.3 SUBMITTALS

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

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

a. Sealants

b. Primers and cleaners.

c. Adhesives (if applicable)

3. Manufacturer’s instructions and recommendations

A. Warranty: Provide sample of manufacturer’s standard warranty.

B. Pre-construction field adhesion test report.

1.4 QUALITY ASSURANCE

1. Installer Qualifications: Experienced installer trained for the application of joint sealants required for this project with record of successful completion of projects of similar scope.

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

3. Preconstruction Field-Adhesion Testing: Prior to installing joint sealants, field test adhesion to joint substrates using ASTM C 1193 Method A or method recommended by manufacturer. Verify adhesion is adequate. Modify joint preparation recommendations for failed joints and re-test. Submit written report to COR.

1.2 WARRANTY

Special Installer's Warranty: Original statement on Installer's letterhead in which Installer agrees to repair or replace joint sealants that demonstrate deterioration or failure within specified warranty period.

1. Warranty period: Two (2) years from date of substantial completion.

Manufacturer’s Warranty: Special Manufacturer's Warranty: Manufacturer's standard form in which joint sealant manufacturer agrees to furnish joint sealants to repair or replace those that demonstrate deterioration or failure under normal use within warranty period specified. 1.

2. Warranty Period for Silicone Sealants: 15 years date of Substantial Completion.

1.5 DELIVERY, STORAGE, AND HANDLING

1. 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.

2. 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

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

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

3. When joint substrates are wet.

4. 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.

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

PART 2 - PRODUCTS

2.1 MATERIALS, GENERAL

1. 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.

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

2.2 PERFORMANCE REQUIREMENTS

1. Neutral-curing silicone as follows: Tower Shaft Window Frame/Precast joint.

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

b) Grade NS (ASTM C 920).

c) Class: 25 (ASTM C 920).

d) Use: NT, A and M.

e) Shore A Hardness: 25 (ASTM D 2240)

f) Joint Movement Capability (after 14 cure days): Extension: 35 percent.

Compression: 35 percent.

g) Tear Strength: 50 pli (ASTM D 624).

h) Elongation at Break: 800 percent (ASTM D 412).

i) Tensile Strength: 350 psi (ASTM D 412).

j) 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.

k) Available Products: Including but not limited to the following:

BASF Corporation, Construction Chemicals, MasterSeal® NP 1™ 889 Valley Park Drive Shakopee, MN 55379 Customer Service: 800- 433-9517 Technical Service: 800-243-6739 Direct Phone: 952-496-6000 Internet: www.master-builders-solutions.basf.us

2. Multi-purpose building and glazing silicone sealant: Tower Shaft Windows/Glazing joints:

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

b) Grade NS (ASTM C 920).

c) Class: 25 (ASTM C 920).

d) Use: NT, G and A.

http://www.master-builders-solutions.basf.us/

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

f) Ultimate Elongation: 425 percent (ASTM D 412)

g) Tensile Strength, psi: 330 (ASTM D 412)

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

i) Extrusion Rate: 350 g/min.

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

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

l) Available Products: Including but not limited to the following:

i. Dow Corning®999-A Silicon Building & Glazing Sealant

3. Structural Glazing Silicon Sealant:

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

b) Grade NS (ASTM C 920).

c) Class: 50 (ASTM C 920).

d) Use: NT, G and A.

e) Shore A Hardness: 40 (ASTM 2240).

f) Ultimate Elongation: 525 percent (ASTM D 412)

g) Tensile Strength, psi: 350 (ASTM D 412)

h) Movement Capability(%): ±50 (ASTM C 719).

i) Extrusion Rate: 350 g/min.

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

k) Uses Related to Joint Substrates: Cab Glass/ Frame Joint

l) Available Products: Including but not limited to the following:

i. Dow Corning®995-A Silicon Structural Glazing Sealant

2.3 JOINT SEALANT BACKING

1. 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.

2. 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:

a. Open-cell polyurethane foam.

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

3. 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.

2.4 MISCELLANEOUS MATERIALS

1. 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.

2. 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.

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

PART 3 - EXECUTION

3.1 EXAMINATION

1. 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.

2. The contractor must verify with manufacturer that joint sealants specified will be adequate for indicated substrates.

3.2 PREPARATION

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

a. 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.

b. 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.

c. 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.

2. 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. Prime and seal the same day.

3. 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

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

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

3. Sealant:

a. Apply sealant in accordance with manufacturer’s instructions.

b. Verify that temperature and moisture conditions are within manufacturer’s acceptable limits.

c. Completely fill joint with sealant, filling from bottom up to avoid entrapping air.

d. Using clean, dry tool with rounded edge, and of appropriate width for each joint, tool freshly installed sealant to provide preferred concave profile, to ensure intimate contact between sealant and substrate, and to provide neat appearance. Where surface aggregate does not permit proper tooling, install sealant and backer rod so that face of joint is recessed behind exposed aggregate, and sealant is bonded to firm, even surface.

e. Use dry tooling method. Do not use tooling agents such as soapy water or solvents that have not been approved by sealant manufacturer.

4. Curing

a. Allow sealant to cure in accordance with manufacturer’s instructions.

5. 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.

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

7. Use masking tape to protect adjacent surfaces of recessed tooled joints and to ensure neat sealant lines.

3.2 FIELD QUALITY CONTROL

3.2.1 INSPECTION

1. During Work of the section, inspect Work to assure compliance with manufacturer’s instructions, Specifications, and Drawings.

2. Evaluate adhesion of sealant in accordance with ASTM C1521.

3. Non-Compliant Work: If inspections reveal non-compliant Work or Work that was not installed in accordance with Specifications, and/or manufacturer requirements, remove adjacent Work until a location is reached where installation was performed properly.

3.2.2 FIELD WATER SPRAY TESTING

3.2.2.1 After joint sealants have cured the contractor must conduct a water spray testing on all windows around the tower building.

1. Nozzle water testing consists of applying water using a handheld spray assembly employing a Type B2 #6.030 nozzle, pressure gauge, control valve, and a 3/4" garden hose. The water flow to the nozzle is adjusted to produce 30 psi at the nozzle. Water will be directed at the joint under test, perpendicular to the face of the specimen. The nozzle will be moved slowly back and forth above the joint, at a distance of 1' 0", for a period of five minutes for each 5' 0" of joint. An observer on the inside will check for water leakage.

2. Test shall STOP immediately when water is noted. Mark location for repair.

3. Test shall start at the lower levels of the building and moving up.

3.3 CLEANING

1. 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.

3.4 PROTECTION

1. 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 and installations with repaired areas are indistinguishable from original work.

SECTION 09 91 14 – EXTERIOR METAL COATINGS AND

WATERPROOFING (HIGH-PERFORMANCE SYSTEM)

PART 1 – GENERAL

1.1 SUMMARY

1. This Section includes all labor, materials, equipment, and incidentals required to perform surface preparation, corrosion repair, and application of high-performance protective coating systems for exterior metal components.

Work includes, but is not limited to, exterior metal wall panels, guardrails, handrails, catwalk, safety rail systems, and associated brackets, fasteners, and connections.

2. The work shall include complete removal of failed coatings, treatment of corroded substrates, mechanical repair of deteriorated metal components, sealing of joints and penetrations, and application of a multi-coat protective coating system designed to provide long-term corrosion resistance and waterproofing performance in a coastal Florida environment.

1.2 PERFORMANCE REQUIREMENTS

1. The coating system shall be designed and applied to provide long-term protection against corrosion, ultraviolet degradation, salt air exposure, and wind-driven rain. The completed system shall function as a continuous protective and water-resistant barrier across all exposed metal surfaces, including seams, joints, and fastener penetrations.

2. The system shall maintain adhesion and performance under conditions of high humidity, thermal cycling, and direct solar exposure typical of Jacksonville, Florida. The completed coating system shall be capable of achieving a minimum service life of 10 to 15 years prior to major recoating.

1.3 SUBMITTALS

1. Submit product data for each component of the coating system, including primers, intermediate coats, topcoats, sealants, and repair materials.

Submittals shall include manufacturer’s technical data sheets, application instructions, recommended surface preparation standards, and required dry film thickness ranges.

2. Provide documentation demonstrating compliance with corrosion resistance testing, including ASTM B117 salt spray performance where applicable.

Submit manufacturer data indicating ultraviolet resistance and color retention properties.

3. Submit coating system shop drawings or schedules identifying coating systems and locations. Provide physical samples showing full coating system build-up, including primer, intermediate, and topcoat layers.

1.4 QUALITY ASSURANCE

1. All coating materials for each system shall be supplied by a single manufacturer to ensure compatibility. The contractor must demonstrate experience with industrial protective coatings and surface preparation in accordance with SSPC/NACE standards.

1.5 DELIVERY, STORAGE, AND HANDLING

1. Materials shall be delivered in original, unopened containers with manufacturer labels intact. Store materials in well-ventilated areas protected from moisture, heat, and direct sunlight. Maintain storage temperatures in accordance with manufacturer recommendations.

1.6 FIELD CONDITIONS

1. Do not apply coatings when ambient or surface temperatures fall outside manufacturer recommendations. Coatings shall not be applied when relative humidity exceeds 85 percent, when surfaces are within 5 degrees Fahrenheit of the dew point, or when precipitation is expected during the application or curing period.

PART 2 – PRODUCTS

2.1 GENERAL

1. All coatings specified in this Section shall be industrial-grade protective coatings suitable for exterior exposure in coastal environments.

Architectural-grade paints are not acceptable.

2. Acceptable manufacturers include, but are not limited to, Sherwin-Williams, PPG, Carboline, and Tnemec, or approved equal systems meeting the performance requirements specified herein.

3. Color should match the current color of the facility as closely as possible.

Basis of design is anodized bronze.

4. All materials should be rated for both horizontal and vertical installation.

2.2 METAL REPAIR MATERIALS

1. Provide stainless steel rivets for repair of metal panels and assemblies.

Sealants shall be polyurethane or hybrid sealants compatible with the coating system and suitable for exterior exposure.

2. Rust conversion materials shall be phosphoric acid-based converters such as Ospho or approved equal. Provide epoxy fillers for repair of pitted or deteriorated metal surfaces.

2.3 COATING SYSTEM FOR STEEL AND FERROUS METALS

1. Surface preparation shall be performed in accordance with SSPC-SP 3 at a minimum, with SSPC-SP 11 required in areas of active corrosion or coating failure.

2. Prime coat shall consist of an epoxy anticorrosive primer applied at a dry film thickness of 3 to 5 mils. Intermediate coat shall consist of a high-build epoxy applied at a dry film thickness of 4 to 6 mils.

3. Topcoat shall consist of an aliphatic polyurethane or polysiloxane coating with high ultraviolet resistance and color stability, applied at a dry film thickness of 2 to 4 mils. The finish shall be matte/ non reflective.

4. The total system dry film thickness shall be not less than 10 mils and not more than 15 mils.

5. Products should be both high solids and low VOC.

2.4 WATERPROOFING AND SEALING

1. All joints, seams, and penetrations shall be sealed with compatible sealant prior to coating application. Sealant shall be tooled to provide a continuous and watertight seal.

2. Stripe coating shall be applied to all edges, welds, fasteners, and areas of complex geometry prior to full coating application to ensure complete coverage and film build.

2.5 GUARDRAILS AND HANDRAILS

1. Guardrails and handrails shall receive the same coating system as specified for steel substrates, with the topcoat selected for increased abrasion resistance. Finish shall be semi-gloss to gloss.

PART 3 – EXECUTION

3.1 EXAMINATION

1. Examine all substrates to determine extent of corrosion, coating failure, and structural deterioration. Notify the Contracting Officer of conditions requiring repair beyond the scope of this Section prior to proceeding.

3.2 CORROSION REPAIR

1. Remove all loose rust, scale, and deteriorated coatings. Treat remaining rust with approved rust converter. Ospho rust neutralizer or approved equal. Fill pitted areas with epoxy filler where required to restore surface continuity.

2. Repair large gaps of deteriorated metal components using sheet metal of similar gauge and material, with rivets or other approved mechanical fastening methods. Ensure all repairs restore structural integrity and provide a sound substrate for coating application. Apply sealant between new metal and existing surface.

3. Seal all joints, seams, and penetrations with approved sealant.

3.3 SURFACE PREPARATION

1. Clean all surfaces of dirt, oil, grease, salts, and other contaminants that may interfere with coating adhesion. Pressure washing shall be performed where required to remove soluble salts and surface contamination.

2. Prepare surfaces to the specified SSPC/AMPP standard. Ensure all surfaces are dry and free of contaminants prior to coating application.

3.4 APPLICATION

1. Apply all coatings in strict accordance with manufacturer’s written instructions. Apply stripe coats to edges, welds, and fasteners prior to full coating application.

2. Apply coatings to achieve specified dry film thickness. Ensure uniform coverage free of runs, sags, holidays, or other defects.

3.5 FIELD QUALITY CONTROL

1. Dry film thickness measurements shall be performed to verify compliance with specified requirements. Areas failing to meet requirements shall be recoated at no additional cost to the Government.

3.6 CLEANING AND PROTECTION

1. Protect adjacent surfaces and equipment from damage during coating operations. Remove all waste materials and debris from the site at the end of each workday. Dispose of all materials in accordance with applicable regulations.

2. At completion of work, clean all surfaces and restore any damaged adjacent work to original condition.

SECTION 07 04 20 – ROOF COATINGS

GENERAL

1. Site Preparation

1. Mobilize crew and equipment. Set up necessary lighting as directed by COR.

2. Inspect the existing roof and document necessary repairs.

3. Remove dirt and debris using power washing and manual cleaning.

4. Ensure drains and scuppers are clear for proper drainage.

5. Remove all impacted lightning protection and store for reinstallation after coating.

2. Surface Repairs and Priming

1. Repair cracks, blisters, and seams with compatible patching materials.

2. Patch materials to be submitted to FAA for approval prior to any work start and should match existing roo�ing system materials

3. All materials used shall be low VOC (less than 50g/L)

4. Reinforce seams, penetrations, and �lashing with silicone-based sealant or fabric reinforcement as directed by COR.

5. For application over a modi�ied bitumen roof, apply an asphalt bleed-blocking primer and allow it to fully cure before coating.

3. Silicone Coating Application

1. Prepare and mix the silicone roof coating per manufacturer instructions.

2. Apply a base coat (Typical 1.5 gallons per 100 sq. ft. but follow manufacturer recommendations).

3. Allow base coat to cure (minimum 8 hours, depending on weather conditions and manufacturer recommendations).

4. Apply a second coat to achieve total required thickness (2-3 gallons per 100 sq.

ft. typ, but refer to manufacturer’s speci�ications to ensure warranty compliance).

5. Ensure even application using rollers, brushes, or airless spray equipment.

6. Flash scuppers a minimum of 2” into the throat of the scupper using 100% silicone sealant and 3” minimum onto the surrounding wall or deck.

7. Flash all pipes with 100% silicone sealant.

8. Sealant pockets are �lashed similar to pipes. The entire top of the pocket and penetrations (minimum 1” onto the penetration) are coated with 100% Silicone Roof Coating.

9. Sealant pockets in sound condition may be coated with the 100% Silicone Sealant applied with a brush or trowel 1/8” to 1/4” thick fully encapsulating the sealant pocket. Sealant should extend out from the base of the pocket a minimum of 3” on all sides with edges tapered to provide a smooth transition for the 100% Silicone Roof Coating.

10. Apply walkway granules around all HVAC equipment and entire perimeter of roof.

11. After �inal coat is cured, reinstall lightning protection system as it was existing.

12. Recommended Adhesives:

i. 3M Scotch-Weld DP8005 or DP8010 Blue

a. Designed for: Dif�icult plastics and low-energy surfaces (like polyethylene and silicone).

b. Notes: May require roughening the surface slightly and/or using a primer like 3M’s Adhesion Promoter 111.

ii. DowSil 795 or 791 (Silicone Adhesive/Sealants)

a. Designed for: Architectural applications including curtain walls and metal �lashing to silicone-coated surfaces.

b. Cure: Neutral-cure silicone adhesive.

c. Notes: Compatible with other silicone products, good for

UV/weather exposure.

iii. SikaFlex-221 or SikaSil-GP

a. General-purpose polyurethane or silicone adhesives that can bond to many surfaces.

b. Prepping: Light abrasion and solvent cleaning may help adhesion.

c. Note: Test for compatibility with your speci�ic silicone roof product.

Surface Prep Tips:

• Clean: Remove dust, oils, and debris. Use isopropyl alcohol or a cleaner recommended by the roof coating manufacturer.

• Roughen: Light abrasion with Scotch-Brite or 220-grit sandpaper can improve bond strength—check that this won’t void your roof warranty.

• Primer: Some adhesives require a primer for silicone—test a small area �irst.

Avoid:

• Epoxies and most construction adhesives don’t bond well to silicone.

• Hot glue or acrylic adhesives have poor weather resistance and very low adhesion to silicone.

• L. Conductors shall be fastened to the structure upon which they are placed at intervals not exceeding 3ft (1m)

• M. Roo�ing membrane strapped over the conductor will not be considered a suitable fastener.

• N. Fasteners must be made of the same materials as the conductor, or of a material equally resistant to corrosion as that of the conductor.

4. Quality Assurance and Final Inspection

1. Application should conform to ASTM D6694 Standing Speci�ication for Liquid-

Applied Silicone Coating

2. Test Adhesion via ASTM D-903.

Test Procedure Overview

Preparation of Specimens:

• Sealant is applied between two �lat substrates, typically with a backing material.

• Specimens are allowed to cure under standard or speci�ied conditions.

Peel Testing:

• After curing, one end of the sealant is pulled at a 90° angle (perpendicular to the bonded surface) at a constant rate (usually 2 inches/min).

• The force required to peel the sealant is recorded.

Results:

• Measured in pounds-force per inch (lbf/in) or newtons per meter (N/m).

• Observations include whether the sealant fails by pulling away from the substrate

(adhesive failure), tearing within itself (cohesive failure), or damaging the substrate.

Criterion Acceptable Outcome Peel Strength ≥ 2.0 lbf/in (higher is better) Failure Mode At least 50% cohesive failure (sealant tears within itself) is ideal.

Adhesive Failure Should be minimal or absent — indicates poor bonding.