SECTION 07570

COATED SPRAYED FOAM ROOFING

Guideline Specification – Acrylic Elastomeric Roof Coating

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** NOTE TO SPECIFIER ** Bayer MaterialScience LLC, BaySystems; Spray Polyurethane Foam (SPF) Insulation Roofing, Bayblock Acrylic and Silicone Coatings products.

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This section is based on the products of Bayer MaterialScience LLC, BaySystems, which is located at:

2400 Spring Stuebner Rd.

Spring, TX 77389

Toll Free: (800) 221-3626

Phone: (281) 350-9000

Fax: (281) 288-6450

Web Site:

E-mail:

[click Here] for additional information.

BaySystems produces customized solutions based on proven polyurethane system brands and unrivalled experience garnered from a worldwide network. You will always find BaySystems ready to listen to your needs and give you a reliable response in your language. We also draw on the wide-ranging polyurethane expertise of our colleagues from Bayer MaterialScience, as producers of high-quality polyurethane raw materials. At BaySystems, all activities concerning quality, safety and environmental protection are integrated in a single global management system.

With over 4,000 employees at more than 20 sites, we offer every polyurethane processor – irrespective of size or specialization – optimum solutions, technical advice, quality service and polyurethane systems. Why not harness these resources to ensure your company’s future business success?

BaySystems produces Bayblock™ (acrylics) that are water-based elastomeric coatings and Bayseal™ (Spray Foam) widely used in BaySystems roofing systems for most roofing substrates. TheBayblock™ (acrylics) are also tyically used as “cool” roof coatings over various roof surfaces. They have earned high CRRC® ratings due to their high reflectivity of harmful UV rays.

This specification covers coated sprayed foam roofing and includes Spray Polyurethane Foam (SPF) Insulation Roofing and Bayblock Acrylic and Baytec™ Sil Silicone Coatingsproducts. Bayseal™ Spray Polyurethane Foam (SPF) Insulation Roofing, when used with these elastomeric coatings, creates a complete roofing system that insulates, protects, stops leaks, adds structural support to the building, and cuts the amount of radiated heat into the building, thereby cutting energy costs.

PART 1 GENERAL

1.1SECTION INCLUDES

** NOTE TO SPECIFIER ** Delete items below not required for project.

  1. Preparation of Substrate.
  1. Sprayed in-place Polyurethane Foam Insulation.
  1. Acrylic Elastomeric Roof Coating.
  1. Roofing Granules.
  1. Walkways.

1.2RELATED SECTIONS

** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.

  1. Section 02225 - Selective Demolition and Renovation Work
  1. Section ______- ______: Roof substrate.
  1. Section 07590 - Membrane Roof Repairs
  1. Section 07620 - Sheet Metal Flashing and Trim: Perimeter flashings; Counterflashings to roof penetrations. (All repairs most meet manufacturer guidelines)
  2. Section 07710 - Manufactured Roof Specialties: Counterflashings, gravel stops, facias and expansion joints.
  1. Section 07900 - Joint Sealers.

1.3REFERENCES

** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.

  1. ASTM C 518 - Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus.
  1. ASTM D 93 - Standard Test Methods for Flash Point by Pensky-Martens Closed Cup Tester.
  1. ASTM D 412 - Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers -Tension.
  1. ASTM D 562 - Standard Test Method for Consistency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer-Type Viscometer.
  1. ASTM D 570 - Standard Test Method for Water Absorption of Plastics.
  1. ASTM D 471 - Standard Test Method for Rubber Property, Effect of Liquids
  1. ASTM D 624 - Standard Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers.
  1. ASTM D 903 - Standard Test Method for Peel or Stripping Strength of Adhesive Bonds , adhesive bonding, peel strength, stripping strength.
  1. ASTM D 1353 - Standard Test Method for Nonvolatile Matter in Volatile Solvents for Use in Paint, Varnish, Lacquer, and Related Products.
  1. ASTM D 1549 - Test Method for Determination of Solar Reflectance
  1. ASTM D 1621 - Standard Test Method for Compressive Properties of Rigid Cellular Plastics.
  1. ASTM D 1622 - Standard Test Method for Apparent Density of Rigid Cellular Plastics.
  1. ASTM D 1644 - Standard Test Methods for Nonvolatile Content of Varnishes.
  1. ASTM D 1653A - Standard Test Methods for Water Vapor Transmission of Organic Coating Films.
  1. ASTM D 2126 - Standard Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging.
  1. ASTM D 2240 - Standard Test Method for Rubber Property, Durometer Hardness.
  1. ASTM D 2370 - Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100 degrees C.
  1. ASTM D 2697 - Standard Test Method for Volume Nonvolatile Matter in Clear or Pigmented Coatings.
  1. ASTM D 2794 - Standard Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact).
  1. ASTM D 2856 - Standard Test Method for Open-Cell Content of Rigid Cellular Plastics by the Air Pycnometer.
  1. ASTM D 6083 - Standard Specification for Liquid Applied Acrylic Coating Used in Roofing.
  1. ASTM D 6694 -Specification for Liquid-Applied Silicone Coating Used in Spray Polyurethane Foam Roofing.
  1. ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building Materials , flame spread, flame spread index, smoke developed, smoke developed.
  1. American Wood Preserve Bureau (AWPB) Standard LP-2
  1. UL 790 - Standard Test Methods for Fire Tests of Roof Coverings.
  1. SPFA (Spray Foam Allinace) AY Documents

** NOTE TO SPECIFIER ** Edit the following paragraphs as required to meet local code and insurance underwriters requirements. Contact manufacturer for additional information.

1.4DESIGN / PERFORMANCE REQUIREMENTS

  1. Underwriters Laboratories, Inc. UL 790: Class A Fire Hazard Classification as applied to the deck types and inclines listed.
  1. Factory Mutual Approval for Bayseal Polyurethane Foam and Bayblock II, Bayblock HT coatings for use in Class 1 roof construction as described in the current edition of the FM Approval Guide. Windstorm rated 1-60 to 1-180 (depending on construction).
  1. Miami Dade NOA No. 03-0820.01 for BaySystems’ single component Silicone coating system SCM 3400 Series membrane applied over foam roofs and complying with the Florida Building Code including High Velocity Hurricane Zone.
  1. Miami Dade NOA No. 05-1202.02 for Polyurethane Foam and Bayblock Acrylic Coating over Concrete Deckand complying with the Florida Building Code including High Velocity Hurricane Zone.
  1. Miami Dade NOA No. 05-1202.01 for Polyurethane Foam and Bayblock Acrylic Coating over Steel Deckand complying with the Florida Building Code including High Velocity Hurricane Zone.
  1. Miami Dade NOA No. 06-0320.25 for Polyurethane Foam and Bayblock Acrylic Coating over Recover Deckand complying with the Florida Building Code including High Velocity Hurricane Zone.

1.5SUBMITTALS

  1. Submit under provisions of Section 01300.
  1. Product Data: Manufacturer's data sheets on each product to be used, including:
  2. Preparation instructions and recommendations.
  3. Storage and handling requirements and recommendations.
  4. Installation methods.

** NOTE TO SPECIFIER ** Delete the following paragraphs if LEED is not applicable.

  1. LEED Submittals: Provide documentation of how the requirements of Credit will be met:
  2. List of proposed materials with recycled content. Indicate post-consumer recycled content and pre-consumer recycled content for each product having recycled content.
  3. Product data and certification letter indicating percentages by weight of post-consumer and pre-consumer recycled content for products having recycled content.
  4. List of proposed materials and certification letter indicating use of materials having a Solar Reflective Index equal to or greater then the required values for a minimum of 75 percent of the roof surface.

** NOTE TO SPECIFIER ** Delete selection samples if colors have already been selected.

  1. Selection Samples: For each finish product specified, two complete sets of color chips representing manufacturer's full range of available colors.
  1. Verification Samples: For each finish product specified, two samples, minimum size 6 inches (150 mm) square, representing actual product and color.
  1. Manufacturer's Certificates: Certify products meet or exceed specified requirements.

1.6QUALITY ASSURANCE

  1. Manufacturer Qualifications: Company specializing in manufacturing urethane foam products and systems of this section with minimum ten years documented experience.
  1. Installer Qualifications: A current BaySystems Qualified Applicator specializing in performing Work of this section with minimum three years documented experience.

** NOTE TO SPECIFIER ** Include a mock-up if the project size and/or quality warrant taking such a precaution. The following is one example of how a mock-up on a large project might be specified. When deciding on the extent of the mock-up, consider all the major different types of work on the project.

  1. Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and application workmanship.
  2. Finish areas designated by Architect.
  3. Do not proceed with remaining work until workmanship, color, and sheen are approved by Architect.
  4. Refinish mock-up area as required to produce acceptable work.

1.7DELIVERY, STORAGE, AND HANDLING

  1. Store products in manufacturer's unopened packaging, clearly marked with the manufacturer's name, brand name, product identification, type of material, safety information, manufacture date, and lot numbers until ready for installation.
  1. Store acrylic coating materials between 50 degrees F (18 degrees C) and 90 degrees F (29 degrees C) with careful handling to prevent damage to products. If conditions exceed these ranges, special consideration in storage must be taken. Do not store at high temperatures in direct sunlight.
  1. Protect all materials from exposure to moisture, freezing and other damage during transit, handling, storage, and installation.
  1. Store and dispose of solvent-based materials, and materials used with solvent-based materials, in accordance with requirements of local authorities having jurisdiction.

1.8PRE-INSTALLATION MEETINGS

  1. Convene pre-installation meeting a minimum of two weeks prior to commencing work of this section.
  1. Attendance: Architect, Contractor and roof system applicator.
  1. Agenda: Review installation sequence and scheduling.

1.9PROJECT CONDITIONS

  1. Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
  1. Do not apply polyurethane foam or roof coating during periods of rain, snow, fog, and mist.
  1. Do not apply the polyurethane foam when substrate or ambient air temperatures are below 50 degrees F (10 degrees C) or above 120 degrees F (49 degrees C), or when wind velocities exceed 12 mph. Do not apply polyurethane foam when the substrate surface temperature is less than 5 degrees F (minus 15 degrees C) above the ambient temperature.
  1. Do not apply acrylic roof coatings at temperatures below 50 degrees F (10 degrees C) or when there is a possibility of temperatures falling below 32 degrees F (0 degrees C) within a 24 hour period.
  1. Use windscreens during the application of the polyurethane foam and roof coating to prevent overspray onto surfaces not intended to receive foam and coating. Under no circumstances shall the polyurethane foam be applied when wind speeds exceed 15 miles per hour.

1.10WARRANTY

  1. Provide BaySystems 10-year Full labor and Material Warranty upon completion, inspection and acceptance of the project. Warranty shall cover repair of leaks caused by deterioration of any component of the installed System, improper workmanship in the roof installation, and defects in the coating.

PART 2 PRODUCTS

2.1MANUFACTURERS

  1. Acceptable Manufacturer: Bayer MaterialScience LLC, 2400 Spring Stuebner Rd., Spring, TX 77389. ASD. Phone Toll Free: (800) 221-3626. Phone: (281) 350-9000. Fax: (281) 288-6450. Web Site: E-mail: ______.

** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.

  1. Substitutions: Not permitted.
  1. Requests for substitutions will be considered in accordance with provisions of Section 01600.

2.2POLYURETHANE FOAM

  1. General: Spray, two-component monolithic polyurethane foam shall be BaySystems Bayseal , two- component foam designed for use as a self-adhering, seamless, high insulating, spray applied rigid polyurethane foam roof system, as manufactured by BaySystems.

** NOTE TO SPECIFIER ** Select one of the following two polyurethane paragraphs as required for the system specified. Delete the paragraph not required.

  1. Bayseal 2.7 is designed for spray application and shall have the following minimum physical properties when cured:
  2. Minimum in-place Density: Minimum 2.7 lb/cf when tested in accordance with ASTM D 1622.
  3. Compressive strength: Minimum 45 psi when tested in accordance with ASTM D 1621.
  4. Closedcell content: Minimum 90 percent when tested in accordance with ASTM D 2856.
  5. R-Value aged: 6.4 hr/sf/degrees F/Btu minimum at 1 inch thick when tested in accordance with ASTM C 518.
  6. Dimensional Stability, 7 days, 158 degrees F, 100 percent R.H: Percent volume change, less than 1 percent when tested in accordance with ASTM D 2126.
  7. Flame spread: Class II, less than 75 when tested in accordance with ASTM E 84.
  1. Bayseal 3.0 is designed for spray application and shall have the following minimum physical properties when cured:
  2. Minimum in-place Density: 3.0 lb/cf when tested in accordance with ASTM D 1622.
  3. Compressive strength: Minimum 50 psi when tested in accordance with ASTM D 1621.
  4. Closedcell content: Minimum 90 percent when tested in accordance with ASTM D 2856.
  5. R-Value aged: 6.4 hr/sf/degrees F/Btu minimum at 1 inch thick when tested in accordance with ASTM C 518.
  6. Dimensional Stability, 7 days, 158 degrees F, 100 percent R.H: Percent volume change, less than 1 percent when tested in accordance with ASTM D 2126.
  7. Flame spread: Class II, less than 75 when tested in accordance with ASTM E 84.

2.3ACRYLIC ELASTOMERIC COATING

** NOTE TO SPECIFIER ** Select one of the following two elastomeric coating paragraphs as required for the system specified. Delete the paragraph not required. Ponding water conditions should be avoided.

  1. Acrylic elastomeric coatings shall be Bayblock II/IIBase a technologically advanced, high-solids, fire retardant, thixotropic, acrylic latex coatings uniquely formulated for the protection of sprayed-in place polyurethane foam insulation, stucco, concrete block, metal, single ply, and modified bituminous roofing. Acrylic latex coating shall have the following minimum properties:
  2. Tensile Strength: 279 psi when tested in accordance with ASTM D 412.
  3. Elongation: 502 percent when tested in accordance with ASTM D 412.
  4. Reflectivity: 0.87
  5. Emissivity: 0.94 percent.
  6. Fire Rating: UL 790 Class A. Combustible Deck Class B.
  7. Solids by Weight: 70 percent plus or minus 2 when tested in accordance with ASTM D 6083.
  8. Solids by Volume: 57 percent plus or minus 2 when tested in accordance with ASTM D 6083.
  9. Theoretical Coverage DFT: 9.5 dry mils on100 sq ft.
  10. Temperature Limits: minus 30 degrees F to plus 200 degrees F.
  11. Color Topcoat:

** NOTE TO SPECIFIER ** Select one of the following topcoat color paragraphs as required. Delete the paragraphs not required.

  1. White.
  2. Gray.
  3. Ivory Gray.
  1. Color Basecoat: Gray.
  1. Bayblock HT/HTBase is a technologically advanced, high-solids, alkali resistant, thixotropic, acrylic elastomeric coating uniquely formulated for the protection of sprayed-in place polyurethane foam, metal, polyurea, stucco, siding, and concrete. Acrylic elastomeric coating shall have the following minimum properties:
  2. Tensile Strength: 358 psi at 20 mils when tested in accordance with ASTM D 2370.
  3. Elongation: 485 percent at 20 mils when tested in accordance with ASTM D 412.
  4. Adhesion: 4.15 pli plus or minus 0.2 when tested in accordance with ASTM C794 and ASTM D 903.
  5. Hardness: 72.3 when tested in accordance with ASTM C 661.
  6. Permeance: 7.1 at 20 mils when tested in accordance with ASTM E 96 Procedure B.
  7. Tear Resistance: 112 psi when tested in accordance with ASTM D 624.
  8. Fire Rating: UL 790 Class A. Combustible Deck Class B.
  9. Solids by Weight: 65 percent plus or minus 2 when tested in accordance with ASTM D 1644,
  10. Flash Point: No flash to boiling when tested in accordance with ASTM D 93.
  11. Solids by Volume: 55 percent plus or minus 2 when tested in accordance with ASTM D-2697
  12. Theoretical Coverage DFT: 9.5 dry mils on 100 sq ft.
  13. Volatile Organic Compounds: US EPA Reference Method 24 0 g/L.
  14. Accelerated Weathering: Pass, when tested in accordance with ASTM G 26 (3000 hours).
  15. Salt Spray Resistance: Pass, when tested in accordance with ASTM B 117.
  16. Wind Driven Rain: Pass, when tested in accordance with Fed Spec. TT-C-555B.
  17. Hail Resistance: Pass, when tested in accordance with FM Severe Hail Test.
  18. Low Temperature Flexibility: Pass 1/8 mandrel, when tested in accordance with ASTM C 734.
  19. Solar Reflectance (White): 81.8 percent when tested in accordance with ASTM C 1549 (CRRC Testing).
  20. Thermal Emittance: 0.94 when tested in accordance with ASTM C 1371 (CRRC Testing).
  21. Color HT Topcoat:

** NOTE TO SPECIFIER ** Select one of the following topcoat color paragraphs as required. Delete the paragraphs not required.

  1. White.
  2. Gray.
  3. Ivory Gray.
  1. Color Basecoat: Gray or Ivory.

2.4PRIMER COATING

** NOTE TO SPECIFIER ** Select one or more of the following primer coating paragraphs as required for the surfaces as applicable. Delete the paragraphs not required.

  1. Bayblock Prime RI: A two component, water based rust inhibitive primer for the preparation of ferrous and non-ferrous metal surfaces for the application of elastomeric coatings and spray polyurethane foam.
  1. Bayblock Prep, is a water based blend of surfactants formulated for the preparation of fully adhered EPDM roof surfaces.
  1. Bayblock Prime 100: A single component, water-based, general purpose primer to for the preparation of most non-metallic surfaces for the application of elastomeric coatings and spray polyurethane foam. Suitable for built-up roofing, wood, concrete, spray polyurethane foam, aged asphaltic and other substrates.

2.5ACCESSORIES

  1. Wood nailers, sleepers or other wood blocking to be No. 2 Common Douglas fir or yellow pine, pressure treated in accordance with the current American Wood Preserve Bureau (AWPB) Standard LP-2.
  1. Fasteners:
  2. Fasteners for securing to wood substrates: Hot dipped galvanized steel nails, domestically produced; 3-1/2 inches (6.4 mm) long 16D spiral shank wire nail.
  3. Fastener for nailing sheet metal flanges to wood substrate: Hot dipped galvanized steel roofing nails, No. 11 or 12 gauge, barbed shank, minimum 3/8 inch (9.5 mm) diameter and head 1-1/2 inches (38 mm) long.

PART 3 EXECUTION

3.1EXAMINATION

  1. Do not begin installation until substrates have been properly prepared.
  1. Verify that all surfaces to receive polyurethane foam insulation are clean, dry and free of dust, dirt, debris, oil, solvents and all materials that may adversely affect the adhesion of the polyurethane foam.
  1. Verify that all roof penetrations and flashings are properly installed and secured. Verify that metal roof opening covers designated to receive polyurethane foam insulation are permanently secured.
  1. If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.

3.2PREPARATION