Beverly Vista School Deck Waterproofing. Bid Number16-17/100 SECTION TRAFFIC COATINGS

Transcription

1 Beverly Vista School Deck Waterproofing Bid Number16-17/100 SECTION TRAFFIC COATINGS PART 1 - GENERAL 1.1 SECTION INCLUDES A. Preparation and examination of substrates to receive epoxy primer and traffic coating system. B. Application of epoxy primer. C. Aplpication of reinforced traffic coating system with reinforced flashing. D. Quality control water testing of applied traffic coating. 1.2 PREINSTALLATION MEETINGS A. Pre-Installation Conference: A pre-installation conference shall be held prior to commencement of field installation to establish procedures to maintain required working conditions and to coordinate this work with related and adjacent work. Verify that final traffic coating system details comply with manufacturer's current installation requirements and recommendations. Meeting attendees should include representatives for the Owner, Architect, Contractor, traffic coating installer and manufacturer. 1.3 SUBMITTALS A. Provide product data for each product to be used. B. Provide shop drawings indicating locations and extent of coating and details of substrate joints and cracks, sheet flashings, penetrations, inside and outside corners, tie-ins with adjoining waterproofing, and other termination conditions. 1. Show substrate preparation of substrates. C. Provide shop drawings indicating locations of traffic coating joints, including joints formed by stopping Work at the end of each day. D. Provide certificates for the following: 1. Installer Qualifications: Submit certificate(s) signed by manufacturer certifying installer meets installer qualification requirements. 2. Manufacturer Qualifications: Submit certificate(s) signed by manufacturer certifying manufacturer meets manufacturer qualification requirements. 3. Manufacturer Reports: Submit letter signed by the manufacturer stating the following: a. Manufacturer received results of susbtrate tests required by this Section. b. Manufacturer approves substrate for installation of traffic system. E. Provide Test and Evaluation Reports. F. Provide Sample Warranty of each warranty required.

2 1.4 QUALITY ASSURANCE A. Installer Qualifications: Installer shall demonstrate qualifications to perform the work of this Section by submitting the following documentation: 1. Certification or license by the traffic coating manufacturer as a locally based, authorized applicator of the product the installer intends to use, for a minimum of five (5) years. 2. List of at least three (3) projects, satisfactorily completed within the past five (5) years, of similar scope and complexity to this project. Previous experience submittal shall correspond to traffic coating system specified in this Section. B. Manufacturer Qualifications: Manufacturer shall demonstrate qualifications by submitting the following documentation: 1. Traffic coating and all accessory products shall be provided by a single manufacturer, unless otherwise specified in this Section, with experience in the direct production and sales of traffic coating systems. 2. Manufacturer shall be capable of providing field service representation during construction, approving an acceptable installer, and recommending appropriate installation methods. C. Mock-ups: Provide mock-up of traffic coating system at a location to be selected by the Architect. Notify Owner and Architect of completion of mock-up for review. Contractor shall commence with traffic coating Work following approval of the mock-up by the Owner and Architect. D. Owner shall make arrangements and payments for an independent observation service to monitor installation of the waterproofing with the project documents and manufacturer s published literature, installation instructions, and site specific details. 1.5 DELIVERY, STORAGE, AND HANDLING A. Delivery: Deliver materials in the manufacturer's original sealed and labeled containers and in quantities required to allow continuity of application. B. Storage: Store closed containers in a cool, dry, well ventilated area away from heat, direct sunlight, oxidizing agents, acids, and alkalis. Isolate products from open fire, flame or any ignition source. Store temperature sensitive products at temperatures recommended by the manufacturer. Quartz silica (sand) must be kept dry during storage and handling. C. Damaged Material: Any materials that are found to be damaged or stored in any manner other than stated above shall be rejected, removed, and replaced at the Contractor's expense. D. Handling: Handle all materials in such a manner as to prevent damage and contamination with moisture or foreign matter. Keep away from open fire, flame, or any ignition source. 1.6 FIELD CONDITIONS A. Notification: Give a minimum of five (5) days notice to the Owner and manufacturer prior to commencing any work and notify both parties on a daily basis of any change in work schedule. B. Ambient Conditions: Comply with manufacturer s requirements for ambient conditions such as temperature and precipitation. 1.7 WARRANTY A. Upon successful completion of the project, and after all post installation procedures have been completed, furnish the Owner with the manufacturer's materials and labor warranty. 1. Basis of Design Warranty: Terapro VTS 10 Year Membrane Warranty

3 PART 2 - PRODUCTS 2.1 MANUFACTURERS A. Traffic Coating: A reinforced, fluid-applied, self-leveling polymethylmethacrylate (PMMA) resinbased system with reinforced flashing for concrete substrates to receive traffic. The system shall have an aggregate surfacing and colored abrasion resistant topcoat. 1. Subject to compliance with requirements provide Terapro VTS Reinforced; Siplast or approved equal. 2.2 COMPONENTS A. Subject to compliance with requirements provide products and accessories by traffic coating manufacturer, unless otherwise indicated. Products listed shall establish the performance requirements for each component of the traffic coating system. 2.3 TRAFFIC COATING PRODUCTS A. Primer: Surface-applied moisture mitigation system recommended by the waterproofing manufacturer. 1. VaporTight Coat-SG3; Aquafin, Inc. B. Flashing Resin: A thixotropic, flexible, acrylic, PMMA-based resin for use in combination with a fleece fabric to form a monolithic, reinforced flashing membrane used in conjunction with traffic coating system. 1. Terapro Flashing Resin C. Base Resin: A flexible, acrylic PMMA-based resin for use as waterproofing in traffic coating system. 1. Terapro Base Resin D. Fleece: A non-woven, needle-punched polyester fabric used as a reinforcement in catalyzed resin flashing and field membrane systems. 1. Pro Fleece a. Nominal Thickness: 40 mils (1 mm) b. Weight: 110 grams per square meter E. Waterproofing/Wearing Layer Resin: A PMMA-based resin combined with aggregate filler to provide the waterproofing/wearing layer in traffic coating system. 1. Terapro VTS Resin F. Wearing/Leveling Aggregate Filler: A quartz aggregate-blend filler added to the waterproofing/wearing layer resin to produce a PMMA-based resin/aggregate slurry waterproofing/wearing layer. 1. Terapro VTS Aggregate Filler G. Color Finish: A color pigmented, multi-component, fast curing PMMA-based finish layer for use in resin based waterproofing and flashing systems. 1. Pro Color Finish 2.4 ACCESSORIES A. Cleaning Solution/Solvent: A clear solvent used to clean and prepare transition areas of in-place catalyzed resin to receive subsequent coats of resin and to clean substrate materials to receive resin. 1. Pro Prep

4 B. Paste: A PMMA-based paste used for remediation of depressions in substrate surfaces prior to the application of the waterproofing system or used as a leveling layer at fleece overlaps of reinforced traffic coating systems. 1. Pro Paste C. Repair Mortar: A two-component, PMMA-based, aggregate filled mortar used for patching concrete substrates. 1. Pro Repair Mortar D. Catalyst: A peroxide-based reactive agent used to induce curing of acrylic resins. 1. Pro Catalyst Powder E. Natural Quartz: A natural-colored, kiln-dried, silica aggregate suitable for broadcast into the wearing layer of the waterproofing system and subsequently coated with a color finish. Quartz shall be supplied by the manufacturer of the waterproofing membrane. 1. Pro VTS Quartz F. Thixotropic Agent: A liquid additive used to increase the viscosity of the PMMA-based resin products, allowing the resins to be applied over vertical or sloped substrates. 1. Pro Thixo 2.5 SOURCE QUALITY CONTROL A. Send moisture testing samples to manufacturer for substrate approval. PART 3 - EXECUTION 3.1 GENERAL A. Examination, preparation and installation of moisture mitigation system and waterproofing shall be in compliance with manufacturers published instructions. 3.2 EXAMINATION A. General: Verify that the substrate is suitable to receive work. Notify the general Architect in writing of conditions detrimental to the proper and timely completion of work. Bring substrate deficiencies into an acceptable condition prior to commencing work. B. Concrete Substrate Requirements: Concrete shall be cured a minimum of 28 days in accordance with ACI-308, with a minimum hardness of 3,500 psi prior to commencement of Work. Curing compounds containing waxes, oils, silicones or other resins that may inhibit adhesion of the traffic coating system shall not be used. Contractor must carefully verify the suitability of a concrete substrate. C. Verify that surfaces to be treated do not contain any kind of sealer or organic compounds. D. Anhydrous Calcium Chloride Testing as per ASTM F-1869 and/or Relative Humidity Testing as per ASTM F-2170 prior to installation of moisture mitigation system. E. Adhesion Testing: Prior to field application of primer and waterproofing, test the substrate using a device conforming to ASTM D 4541 using a 50 mm dolly adhered per the manufacturer s recommendations. Utilize the same concrete preparation methods as that which will be used prior to application of the traffic coating for areas to be evaluated for adhesion. Ensure that a minimum adhesion value of 220 psi is obtained before application of the traffic coating system. If multiple

5 areas or substrates are involved in the scope of work, evaluate each to determine suitability. Maintain testing/evaluation records. 1. Verify adhesion testing procedure with manufacturers prior to testing. Notify Architect in writing of manufacturer s recommendations. 3.3 PREPARATION FOR MOISTURE MITIGATION SYSTEM A. Remove existing floor coverings, coatings and adhesives down to bare concrete, curing compounds, efflorescence, dust, grease, laitance, etc. as recommended by the manufacturer. Acid etching is not allowed. B. Ensure and verify that slabs have surface profile ICRI CSP 3-5 (ICRI, Des Plaines, IL, Guideline No ) for mechanical bond (i.e. medium grit sandpaper). Smooth surfaces are not acceptable and must be prepared in accordance with manufacturer s requirements. C. Burn off reinforcing fibers and collect and vacuum remains. Repair defective areas such as honeycombs, cracks or other defects with a suitable repairing or manufacturer recommended mortar. Treat saw cut and expansion joints as per manufacturer s application guideline. D. Do not apply moisture mitigation system to unprotected surfaces or surfaces where water has accumulated. E. Treat cracks and joints in accordance with manufacturer s published requirements and recommendations. 3.4 INSTALLATION OF MOISTURE MITIGATION SYSTEM A. Mix material in proportions recommended by manufacturer. B. Apply moisture mitigation system in quantities as per manufacturer's specifications and recommendations. Apply in one coat at specified rate. Apply using non-shed synthetic roller or notched squeegee to the still moist substrate, and carefully scrub it into the pores with a long handled scrub brush. Follow with a non-shed synthetic roller to achieve a uniform coverage. C. Follow moisture mitigation system manufacturer s and waterproofing manufacturer s requirements to provide suitable and approved substrate for the waterproofing. 3.5 PREPARATION FOR WATERPROOFING A. Moisture Content Evaluation: Evaluate the level of moisture in the substrate to determine that the moisture content is acceptable for application of the specified traffic coating system. Concrete substrates shall have a maximum moisture content of 6% by weight and a maximum internal relative humidity of 75%. 1. Test slab on grade and above grade substrates for moisture vapor emisiion in accordance with ASTM F1869 and relative humidity in accordance with ASTM F2170. Submit results to manufacturer for their written approval of substrate conditions. B. Finish Surface Condition: Surfaces must be clean, dry and free of substances and conditions such as voids, ridges or sharp projections that could affect the bond or surface appearance of the traffic coating system. C. Protection: Provide protection to prevent dust/debris accumulation, spillage and resin overruns. D. Cleaning: Remove oil and grease with a commercial grade cleaner; thoroughly rinse and dry. Sweep, blow, or vacuum loose surface debris in areas to receive resin.

6 E. Taping: Utilize masking tape at perimeters and joints of the area to be coated to provide neat terminations. F. Preparation of Steel/Aluminum Substrates: Carefully grind to generate a "white-metal" surface and remove loose particles. Extend preparation area a minimum of 1/2-inch beyond the termination of the traffic coating/flashing system. Do not used cleaner/solvent after grinding. Notch steel surfaces to provide a rust-stop where detailed. 3.6 TRAFFIC COATING INSTALLATION A. Comply with manufacturer s latest written application instructions. B. Mixing and Catalyzing of Resins: 1. Thoroughly mix the entire drum of uncatalyzed resins for 2 to 3 minutes before each use if pouring the resin into a second container when batch mixing. 2. Catalyze only the amount of material that can be used within pot life. 3. Add pre-measured catalyst powder to the resin component and stir for 2-minutes using a slow-speed mechanical agitator or mixing stir stick. The amount of catalyst added is based on the weight of the resin used. 4. Refer to the manufacturer s literature for mixing ratios. C. Mixing and Catalyzing of Surface Coating Resin/Aggregate Filler: 1. Thoroughly mix the entire drum of uncatalyzed resin and slowly add amount of filler specified by the manufacturer. 2. Add pre-measured catalyst powder to the resin/filler mixture and stir for 2-minutes using a slow-speed mechanical agitator. The amount of catalyst added is based on the weight of the resin used. Refer to manufacturer s literature for mixing ratios. D. Priming: Using the specified primer, apply to masonry and concrete surfaces that will receive the coating or flashing membrane. 1. Apply the primer using a roller at the minimum rate specified by the primer manufacturer and allow to cure for a minimum of 45 minutes. Application rates may require an increase depending on substrate profile or porosity. When calculating application rates, make allowances for saturation of roller covers and application equipment. 2. Do not let resin pool or pond. 3. Do not over or under-apply primers as this may interfere with proper primer catalyzation. E. Flashing Membrane Application: Complete flashing application prior to the coating membrane application in the field of the roof area. 1. Using masking tape, mask the perimeter of the area to receive the flashing system. 2. Pre-cut fleece to ensure a proper fit at transitions and corners prior to flashing membrane application. 3. Apply a base coat of catalyzed flashing resin to the substrate with a roller or brush at the minimum rate specified by the resin manufacturer. 4. Extend the catalyzed flashing resin 1/4 inch beyond where the fleece reinforcement will be placed. 5. Embed fleece reinforcement into the wet, catalyzed flashing resin base coat using a roller or brush to remove trapped air. 6. Overlap fleece a minimum of 2 inches. Apply an additional coat of catalyzed flashing resin between layers of overlapping fleece. 7. Apply a finish coat of catalyzed flashing resin immediately following the embedment of the fleece with a roller or brush at the minimum rate specified by the resin manufacturer, ensuring full saturation of the fleece reinforcement. 8. Remove tape before catalyzed resin sets. Make allowances for saturation of roller covers and application equipment when calculating resin quantities. Allow to cure for a minimum of 45 minutes.

7 F. Reinforced Waterproofing System Application 1. Using cleaner/solvent, wipe flashing membrane and primer surfaces to receive the field membrane. Allow the surface to dry for a minimum 20 minutes before continuing work. 2. Using a roller, apply a layer of catalyzed base resin over the primed substrate at the minimum rate specified by the resin manufacturer. Embed the fleece reinforcement into the wet, catalyzed base resin waterproofing layer using a wet, but not saturated, roller to remove trapped air. Overlap side and end laps of the fleece a minimum of 2 inches (51 mm). Apply an additional coat of catalyzed base resin between layers of overlapping fleece. Apply a second coat of catalyzed resin immediately following the embedment of the fleece with an application roller or brush at the minimum rate specified by the resin manufacturer, ensuring full saturation of the fleece reinforcement. Allow to cure for a minimum of 45 minutes before application of the wearing layer of resin. 3. Apply a layer of catalyzed waterproofing resin/aggregate filler mixture using a trowel at the minimum rate specified by the waterproofing system manufacturer. Use a spiked roller to remove trowel marks and to even the application of the waterproofing resin/aggregate filler mixture. 4. Immediately broadcast quartz into the wet resin/aggregate filler mixture to refusal. Allow to cure for 2 hours. Sweep excess quartz from the surface. 5. Install color finish using a roller or squeegee at the rate specified by the resin manufacturer. 6. Make allowances for saturation of roller covers and application equipment when calculating resin application rates. 7. If work is interrupted for more than 12 hours, or the surface of a catalyzed resin layer becomes dirty or contaminated from exposure to the elements, thoroughly clean the area with cleaner/solvent. Allow a minimum of 20 minutes for the solvent to evaporate before continuing work. Complete the next application procedure within 60 minutes following the evaporation of the cleaner/solvent. 3.7 WATERPROOFING FLOOD TESTING A. Commence flood testing of the membrane after membrane installation and repairs are complete. 1. Contractor to verify that the structure can withstand the weight of the water test prior to commencement of the water test. 2. The entire deck shall be flood tested for leaks in accordance with ASTM D Install temporary containment assemblies, plug or dam drains, and flood with potable water. The minimum depth of the flood test shall be 2-inches. The minimum duration for each flood test shall be 48 hours. Create temporary dams as required to confine and segment flood testing areas. 3. All flood testing shall be performed in and documented in the presence of the Architect. 4. After flood testing, repair leaks, repeat flood tests, and make further repairs until waterproofing installation is watertight. B. Water test expansion joint bellows/gutters to ensure they do not leak at seams, connections, transitions and terminations. C. If leaks should occur, water must be drained completely and the installation repaired. Retest until a passing water test without leaks is achieved. 3.8 FIELD QUALITY CONTROL A. Final Inspections: Coordinate field inspections with traffic coating manufacturer. B. A punch list of items required for completion shall be compiled by the Contractor and the manufacturer's representative. 1. Notify manufacturer of job completion in order to schedule a final inspection date. C. Mixing containers shall not be placed on deck surfaces upside down.

8 3.9 CLEANING A. All areas around job site shall be free of debris, coating materials, equipment, and related items after completion of job. END OF SECTION