PROJECT NAME

DATEP. 1 of 11

SECTION 07 01 50

MAINTENANCE OF MEMBRANE ROOFING

PART 1:GENERAL

  1. The General Conditions, Supplementary Conditions, Instructions to Bidders, and Division 01- General Requirements shall be read in conjunction with and govern this section.
  1. The Specification shall be read as a whole by all parties concerned. Each Section may contain more or less than the complete Work of any trade. The Contractor is solely responsible to make clear to the Subcontractor the extent of their Work.

1.2.SUMMARY

  1. This section includes requirements for supplying labor, materials, tools, and equipment to complete the Work as shown on the Drawings Architectural Division as specified herein including, but not limited to, the following:
  2. Cleaner
  3. Primer
  4. Sealants
  5. Polyester Fabric Reinforcement (optional)
  6. Roof Coating
  7. Walkway System (optional)
  8. Roof Texture At Walkways (optional)

1.3.RELATED REQUIREMENTS

  1. DIVISION 07 – Thermal and Moisture Protection Section 07 01 20 – Maintenance of Thermal Protection
  1. DIVISION 07 – Thermal and Moisture Protection Section 07 01 50.13 – Roof Moisture Survey
  1. DIVISION 07 – Thermal and Moisture Protection Section 07 01 50.16 – Roof Maintenance Program
  1. DIVISION 07 – Thermal and Moisture Protection Section 07 01 50.19 – Preparation for Re-Roofing
  1. DIVISION 07 – Thermal and Moisture Protection Section 07 01 50.23 – Roof Removal
  1. DIVISION 07 – Thermal and Moisture Protection Section 07 01 50.81 – Roof Replacement
  1. DIVISION 07 – Thermal and Moisture Protection Section 07 01 50.91 – Roofing Restoration
  1. DIVISION 07 – Thermal and Moisture Protection Section 07 01 60 – Maintenance of Flashing and Sheet Metal
  1. DIVISION 07 – Thermal and Moisture Protection Section 07 01 90 – Maintenance of Joint Protection
  1. DIVISION [project specific]- LEED Requirements Section[project specific] – [project specific].

1.4.REFERENCES

  1. The following standards are applicable to this section:
  2. ASTM E96: Water Vapor Transmission of Materials
  3. ASTM DC1549: Solar Reflectance
  4. ASTM D471: Water Absorption
  5. ASTM C794 – 10: Standard Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants
  6. ASTM D6694: Specification for Liquid Applied Silicone Coating Used in Spray Polyurethane Foam Roof Systems.
  7. UL Inc.: Class A Classification for use in roof coverings
  8. US Green Building Council (USGBC), Leadership in Energy and Environmental Design (LEED) - LEED Reference Guide, Version 4.0, and USGBC Project Calculation Spreadsheet. Web Site

1.5.PROJECT CONDITIONS

  1. Environmental Requirements:
  2. No Work shall be performed during rain or inclement weather.
  3. No Work shall be performed on frost or wet covered surfaces.
  1. Protection:
  2. It is the responsibility of the installing contractor to protect all surfaces not included in scope of Work from overspray including, but not limited to, windows, doors, adjacent areas, and vehicles.
  3. Protective coverings shall be secured against wind and shall be vented if used in conjunction with applications preventing collection and moisture.
  4. Contractor to post signs noting potential overspray hazard within 400ft (122 M) of applications.
  5. All air intake ventilation equipment shall be turned off to prevent fumes from entering building.
  6. No smoking signs must be posted as mandated by local fire ordinances.
  1. Ensure all preparation Work is completed prior to installing roof coating.
  1. All equipment shall be grounded during operations.

1.6.PRECONSTRUCTION CONFERENCE

  1. When required, and with prior notice, a manufacturer representative will meet with the necessary parties at the jobsite to review and discuss project conditions as it relates to the integrity of the assembly.

1.7.SUBMITTALS

  1. Provide the following requested information in accordance with Section [project specific] Submittal Procedures:
  2. Qualification Data:
  3. Statement that installing contractor is authorized by manufacturer to complete Work as specified.
  4. Certifications:
  5. Product certification that the assembly components are supplied and warranted by single source manufacturer.
  6. Product Data:
  7. Manufacturer’s guide specification.
  8. Manufacturer’s complete set of technical data sheets for assembly.
  9. Warranty:
  10. Complete set of warranty verification documents as required by manufacturer.
  11. Refer to Section 1.12 Warranty

1.8.MANUFACTURER QUALIFICATIONS

  1. Manufacturer shall demonstrate qualifications to supply materials of this section by certifying the following:
  2. Roof coating manufacturer must not issue warranties for terms longer than they have been manufacturing roof coatings.

1.9.QUALITY ASSURANCE

  1. Single Source Responsibility:
  2. Obtain roof coating and auxiliary materials from a single manufacturer regularly engaged in the manufacturing and supply of the specified products.
  3. Contactor to verify product compliance with federal, state, and local regulations controlling use of Volatile Organic Compounds (VOC).
  1. Installer:
  2. Perform Work in accordance with manufacturer published literature and as specified in this section.
  3. Maintain one (1) copy of manufacturer’s instructions on site.
  4. At all times during the execution of the Work allow access to site by the manufacturer representative.
  5. If meeting with manufacturer during project construction, contact manufacturer a minimum of two weeks prior to schedule meeting.
  1. All components used in this section shall be furnished by a single manufacturer including primary roof coating, fabric reinforcement, sealants, primers, and adhesives.

1.10.DELIVERY, STORAGE, AND HANDLING

  1. Delivery of Materials:
  2. Materials shall be delivered to the jobsite in undamaged and clearly marked containers indicating the name of the manufacturer and product.
  1. Storage of Materials:
  2. Store materials as recommended by manufacturer and conforming to applicable safety regulatory agencies. Refer to all applicable data including but not limited to MSDS sheets, Product Data sheets, product labels, and specific instructions for personal protection.
  3. Keep solvents away from open flame or excessive heat.
  4. Roof coating should be stored in closed containers.
  5. Refer to manufacturer published literature.
  1. Handling:
  2. Provide adequate ventilation for protection from hazardous fumes.
  3. Protect areas not included in scope of work from overspray.
  4. Refer to manufacturer published literature.

1.11.ALTERNATES

  1. Roof coatings such as acrylic, cementitious, ceramic filled or asphalt modified, urethanes, and Kraton based rubber materials are not considered acceptable substitutions.
  1. Submit requests for alternates in accordance with Section [project specific].
  1. Alternate submission format to include:
  2. Evidence that alternate materials meet or exceed performance characteristics of product requirements and documentation from an approved independent testing laboratory certifying that the performance of the system including auxiliary components exceed the requirements of the local building code.
  3. References clearly indicating that the manufacturer has successfully completed projects of similar scope and nature on an annual basis for a minimum of five (5) years.
  4. Manufacturer’s complete set of technical data sheets for assembly.
  1. Submit requests for alternates to this specification a minimum of ten (10) working days prior to bid date. Include a list of twenty-five (25) projects executed over the past five (5) years.
  1. Acceptable alternates will be confirmed by addendum. Substitute materials not approved in writing prior to tender closing shall not be permitted for use on this project.

1.12.WARRANTY

  1. Warranty Submittals:
  2. Contact local Henry sales representative for a complete list of required documents and procedures prior to material purchase. Warranties submitted without required documents and procedures completed may result in delay or rejection of warranty request.
  1. Manufacturer's Single Source Gold Seal Warranty:
  2. Contractor must warranty the system and installation for two (2) years.
  3. Manufacturer must warranty the system and installation; provide material and labor costs for repair for a period of [10 years] [15 years] [20 years] from the date of substantial completion.
  4. Warranty terms are based on cured roof coating thickness.
  5. Refer to Section 3.3.H. Roof Coating Minimum Dry Film Thickness (DFT)

PART 2:PRODUCTS

2.1.MATERIALS MANUFACTURER

  1. Components and roof coating materials must be obtained as a single-source from the assembly manufacturer to ensure total system compatibility and integrity.
  1. Acceptable Manufacturer:
  2. Henry Company

999 N. Sepulveda Blvd. Suite 800

El Segundo, CA 90245

(800) 486-1278

2.2.MATERIALS

  1. Primary Roof Coating (Basis of Design):
  2. Solvent free one-component moisture curing silicone rubber roof coating, having the following properties:
  3. Basis of design: PRO-GRADE® ELITE 988HS 100% Silicone Roof Coating – High Solids
  4. Color: Bright white
  5. Solids Content:
  6. By weight (ASTM D1644): 92 +/-3%
  7. By volume (ASTM D2697): 92 +/-3%
  8. Specific Gravity at 77 degrees F (25 degrees C) (ASTM D1293): 1.20
  9. Flash Point (ASTM D93): 140.9 degrees F (60.5 degrees C)
  10. Tack-Free Time at 75 degrees F (24 degrees C): Approximately 1-2 hours
  11. Dry Time at 75 degrees F (24 degrees C) (ASTM D115): 2-6 hours
  12. Volatile Organic Content (VOC) (ASTM D3960/EPA Method 24): 10g/l max.
  13. Durometer Hardness, Shore A (ASTM D2240): 42 +/-5 points
  14. Tensile Strength, die C (ASTM D412): 320psi
  15. Elongation (ASTM D412): 170%
  16. Permeability (ASTM E96): 4.6 perms
  17. Initial Solar Reflectance (ASTM C1549): White roof coating: 88%
  18. Solar Reflective Index (SRI): 111
  19. Temperature Stability Range (Calculated Weathering): -35 to 212 degrees F (-37 to 100 degrees C)
  20. QUV, 10,000 hours (ASTM B4799): No degradation
  21. Water Absorption (ASTM D471): 0.0005
  1. Assembly Auxiliary Materials:
  2. Primer:
  3. Two Component, water-based epoxy primer to prevent bleed-through, discoloring and staining
  4. Basis of design: PRO-GRADE® ELITE 966 Epoxy Primer
  5. Color:
  6. Part A: White
  7. Part B: Dark Gray
  8. Flash Point (ASTM D93): >212 degrees F (>100 degrees C)
  9. Volatile Organic Content (VOC) (ASTM D3960/EPA Method 24): 60g/lmax
  10. Reinforcement:
  11. Stich bonded, high performance fabric reinforcement sheet, having the following properties:
  12. Basis of design: HE195 Polyester Fabric
  13. Color: White to Yellow White
  14. Elongation (Initial) (ASTM D1682): 61-63%
  15. Volatile Organic Content (VOC) (ASTM D3960/EPA Method 24): 0 g/l maxMaximum VOS: 0 lbs/gal
  16. Mullen Burst (ASTM D3786): 176.8 lbs.
  17. Tensile Strength Film (Initial) (ASTM D1682): 57.1 lbs.
  18. Trapezoidal Tear Strength (ASTM D1117): 16.1 lbs.
  19. Weight of Fabric: 3 oz/sq. yd.
  20. Sealants:
  21. Butter grade, one-part moisture cure sealant consisting of silicone rubber, and having the following properties:
  22. Basis of design: PRO-GRADE® ELITE 600 Butter Grade Silicone Roof Sealer
  23. Colors: White
  24. Solids Content by Volume (ASTM D2697-3): 95%
  25. Tensile Strength, die C (ASTM D412): 130 psi
  26. Elongation (ASTM D412): 275%
  27. Volatile Organic Content (VOC) (ASTM D3960/EPA Method 24): 50g/lmax
  28. Standard grade, one- part moisture cure sealant consisting of silicone rubber, and having the following properties:
  29. Basis of design: PRO-GRADE® ELITE 700 Silicone Roof Sealant
  30. Colors: Bright White
  31. Solids Content by Volume (ASTM D2697-3): 95%
  32. Tack free time: Approximately 1-2 hours
  33. Cure time (ASTM C920): 7 days
  34. Tensile Strength, die C (ASTM D412): 200 psi
  35. Elongation (ASTM D412): 300%
  1. Additional Materials:
  2. Cleaner:
  3. Refer to Section 3.2. E. Surface Cleaning
  1. Roof Texture At Walkways (optional):
  2. 20-40 mesh silica sand or quartz

PART 3:EXECUTION

3.1.EXAMINATION

  1. The installing contractor shall examine and determine that surfaces and conditions are ready to accept the Work of this section in accordance with published literature. Commencement of Work or any parts thereof shall mean installer acceptance of the substrate.
  2. Do not install roof coating over saturated insulation
  3. Do not install roof coating over saturated substrates
  1. As a requirement for meeting warranty conditions the existing roof system must be tested for leaks and moisture retention. It is the installing contractor’s responsibility to verify the insulation and existing roof membrane is dry and leak free prior to installation of roof coating.
  2. Maintain a copy of moisture detection survey for reference and verification of substrate condition prior to installation of roof coating.
  3. Moisture detection survey includes:
  4. Visual inspection
  5. Comprehensive infra-red moisture survey
  6. Core samples
  7. Contact manufacturer for a complete list of alternative methods.
  1. Verify skylights, drains, scuppers, gutters, penetrations, and structures located within area of Work are firmly secured and in good working condition prior to installation.Clean, repair, or replace as required in accordance with published literature prior to installation of roof coating.
  1. Verify existing substrate and assembly flashings are leak-free and watertight.
  1. Do not apply sealants or roof coatings until substrate and environmental conditions are in accordance with manufacturer published literature.

3.2.PREPARATION

  1. All surfaces must be sound, dry, clean, and free of oil, grease, dirt, excess mortar, frost, laitance, loose and flaking particles, or other contaminants.
  1. Existing roof membrane, insulation, and all substrates must be dry and in accordance with manufacturer published literature prior to installation of roof coating.
  1. Removal and replacement of existing roof membrane, wet insulation and /or defective roof substrate:
  2. Completely remove exiting roof membrane,wet insulation, and /or defective materials and replace roofing membrane to match existing in accordance with roofing membrane manufacturer published literature.
  3. Replace insulation and roofing membrane continuously and flushto match existing roofing membrane and secure in accordance with roofing membrane manufacturer published literature. Allow to cure a minimum of 24 hours.
  4. Detail cut seams where existing roof membrane transitions to new roof membrane to maintain an air and water tight assembly using one of the following methods:
  5. Sealant:
  6. Butter grade sealant must be used. Do not use standard grade sealant when repairing existing roof membrane cut seams.
  7. Using a stiff bristled brush or sealant knife apply sealant at 1/8 inch (125 wet mils) extending three (3) inches on each side of existing roof membrane seam until fully coated ensuring a smooth and continuous watertight finish.
  8. Reinforced Roof Coating:
  9. Install one (1) layer of roof coating at one (1) gallon per square (16 wet mils) extending four (4) inches on each side of existing roof membrane seam.
  10. Center six (6) inch wide strip of stitch bond polyester fabric over existing roof membrane seam and fully embed fabric into roof coating ensuring three (3) inches of fabric on each side of existing roof membrane seam. Brush fabric for proper adhesion and removal of all voids.
  11. Apply a second layer of roof coating at two (2) gallonsper square (32 wet mils) extending a minimum four (4) inches on each side of existing roof membrane seam ensuring fabric is fully coated and has a smooth and continuous watertight finish.
  1. All areas must promote positive drainage.
  2. Contact manufacturer technical support or local sales representative for ponding area repair procedures.
  1. Surface Cleaning:
  2. Confirm local ordinances and jurisdiction restrictions prior to selecting from the following cleaning methods.
  3. Clean and prepare existing roof membrane taking caution not to inject water into roofing substrate.
  4. Acceptable Methods of Cleaning
  5. Pressure washer with greater than 2000psi.
  6. Air lance with greater than 2000psi.
  7. Algae, mildew, or fungus:
  8. Treat with a tri-sodium phosphate (TSP) or equivalent non-filming detergent and water solution.
  9. Clear water rinse until all cleaning residue is removed.
  10. All substrate areas must be completely dry prior to primer or coating application.
  11. Refer to manufacturer published literature.

3.3.INSTALLATION

  1. Ensure substrate is ready to receive roof coating in accordance with published literature.
  1. Roof coating may settle during storage. Mix roof coating prior to use with drill and mixer blade until consistent viscosity is achieved.
  1. Substrate temperature must be above 35 degrees F (2 degrees C) and rising and 6 degrees F (3 degrees C) above dew point temperatureand rising.
  2. Application at temperatures lower than 50 degrees F (10 degrees C) and less than 35% relative humidity will typically result in a slower cure time.
  1. Primer:
  2. Apply primer in accordance with manufacturer published literature.
  1. Detailing/Flashing:
  2. All detailing and flashings shall be completed prior to installation of roof coating.
  3. All detailing and flashings shall be installed per manufacturer published literature.
  4. Existing assembly must be continuous and secure prior to application of roof coating.
  5. Pretreatment of existing, intact, and secure roof membrane seams (recommended for Material Warranty):
  6. Required for Ten (10) and fifteen (15) year Gold Seal Warranty:
  7. Install one (1) layer of roof coating at one and a half (1.5) gallons per square (24 wet mils) extending two (2) inches on each side of existing roof membrane seam.
  8. Required for Twenty (20) year Gold SealWarranty; choose from one of the following methods:
  9. Sealant:
  10. Using a stiff bristled brush or sealant knife apply sealant at 1/8 inch thick (125 wet mils) extending three (3) inches on each side of existing roof membrane seam until fully coated ensuring a smooth and continuous watertight finish.
  11. Reinforced Roof Coating:
  12. Install one (1) layer of roof coating at one (1) gallon per square (16 wet mils) extending four (4) inches on each side of existing roof membrane seam.
  13. Center six (6) inch wide strip of stitch bond polyester fabric over existing roof membrane seam and fully embed fabric into roof coating ensuring three (3) inches of fabric on each side of existing roof membrane seam. Brush fabric for proper adhesion and removal of all voids.
  14. Apply a second layer of roof coating at two (2) gallonsper square (32 wet mils) extending a minimum four (4) inches on each side of existing roof membrane seam ensuring fabric is fully coated and has a smooth and continuous watertight finish.
  15. Loose or torn existing roof membrane seams; choose from one of the following methods:
  16. Sealant:
  17. Secure existing roof membrane seams by generously applying sealant under torn or loose area using a stiff bristled brush or sealant knife, and firmly press loose roof membrane into sealant.
  18. Once existing roof membrane seam is fully bonded into sealant generously apply sealant on top of the existing roof membrane seam using stiff bristled brush or sealant knife until fully coated ensuring a smooth and continuous watertight finish.
  19. Reinforced roof coating:
  20. Install one (1) layer of roof coating at one (1) gallon per square (16 wet mils) extending four (4) inches on each side of existing roof membrane seam.
  21. Center six (6) inch wide strip of stitch bond polyester fabric over existing roof membrane seam and fully embed fabric into roof coating ensuring three (3) inches of fabric on each side of existing roof membrane seam. Brush fabric for proper adhesion and removal of all voids.
  22. Apply a second layer of roof coating at two (2) gallons per square (32 wet mils) extending a minimum four (4) inches on each side of existing roof membrane seam ensuring fabric is fully coated and has a smooth and continuous watertight finish.
  23. Roof curbs and parapets; choose from one of the following methods:
  24. Sealant:
  25. Using a stiff bristled brush or sealant knife apply sealant at 1/8 inch thick (125 wet mils) extending four (4) inches on horizontal surface and a minimum of eight (8) inches up vertical surface ensuring a smooth and continuous watertight finish.
  26. Reinforced roof coating:
  27. Install one (1) layer of roof coating at one (1) gallon per square (16 wet mils) extending four (4) inches on horizontal surface and a minimum of eight (8) inches up vertical surface.
  28. Center six (6) inch wide strip of stitch bond polyester fabric at parapet upturn and fully embed fabric into roof coating ensuring three (3) inches of fabric on both horizontal and vertical surfaces.Brush fabric for proper adhesion and removal of all voids.
  29. Apply a second layer of roof coating at two (2) gallonsper square (32 wet mils) extending four (4) inches on horizontal surface and a minimum of eight (8) inches up vertical surface ensuring fabric is fully coated and has a smooth and continuous watertight finish.
  30. Pipe penetrations; choose from one of the following methods:
  31. Sealant:
  32. Using a stiff bristled brush or sealant knife apply sealant at 1/8 inch thick (125 wet mils) extending four (4) inches on horizontal and eight (8) inches up vertical surface ensuring a smooth and continuous watertight finish.
  33. Reinforced roof coating:
  34. Install one (1) layer of roof coating at one (1) gallon per square (16 wet mils) extending four (4) inches on horizontal surface and a minimum of eight (8) inches up vertical surface.
  35. Center six (6) inch wide strip of stitch bond polyester fabric at pipe upturn and fully embed fabric into roof coating ensuring three (3) inches of fabric on both horizontal and vertical surfaces. Brush fabric for proper adhesion and removal of all voids.
  36. Apply a second layer of roof coating at two (2) gallons per square (32 wet mils) extending four (4) inches on horizontal surface and a minimum of eight (8) inches up vertical surface ensuring fabric is fully coated and has a smooth and continuous watertight finish.
  37. Drains:
  38. Using a stiff bristled brush or sealant knife apply sealant at 1/8 inch thick (125 wet mils) from the drain hole opening extending out a minimum of six (6) inches continuously around the drain perimeter ensuring a smooth and continuous watertight finish.
  1. Roof Marking:
  2. Mark desired area in accordance with published literature so that the appropriate amount of roof coating is applied per square. For a two (2) coat application, re-measure prior to installation of second coat to ensure proper millage requirements.
  3. Contact manufacturer for roof marking instructions.
  1. Application of Roof Coating ; choose from one of the following methods:
  2. Single Coat:
  3. Granulated Substrates:
  4. Applicable for ten (10) and fifteen (15) year Gold Seal warranty. Not permitted for twenty (20) year warranty.
  5. Smooth Substrates:
  6. Apply roof coating at minimum gallons per square to achieve overall minimum dry thickness in accordance with warranty requirements.
  7. Allow roof coating to dry.
  8. Two (2) Coat:
  9. Granulated substrates may install roof coating in either a single coat for ten (10) and fifteen (15) year warranty. Roof coatingmust be installed in a two (2) coat installation for a twenty (20) year warranty.
  10. Smooth substrates may install roof coating in either a single coat or a two (2) coat installation.
  11. Apply roof coating at minimum gallons per square to achieve ½ of the minimum dry thickness in accordance with warranty requirements.
  12. Allow roof coating to dry.
  13. Verify substrate is thoroughly clean and free of debris or contamination prior to subsequent application. Wash roof coating as required and allow roof coating to dry.
  14. Apply roof coating at minimum gallons per square to achieve ½ of the minimum dry thickness in accordance with warranty requirements.
  15. Total dry thickness shall be in accordance with warranty requirements.