RELATED DOCUMENTS: Drawings and general provisions of Contract, including General and supplementary conditions and Division-1 Specification sections, apply to work of this section.

DESCRIPTION OF WORK:

1. Extent of insulated roofing system work is shown on drawings and specified herein.

SCOPE (WORK SPECIFIED HEREIN)

1. All labor, materials, transportation, storage facilities, equipment and services necessary to furnish and install spray applied monolithic rigid urethane insulation and TECHGUARD waterproofing and protection systems, including all accessories and devices necessary to complete the roof insulation and waterproofing as indicated and specified.

SUBSTITUTIONS:

1. It is not the intent of the specifications to have any proprietary products. Their intent is to establish a level of quality and set forth minimum standards for the products desired, such as a performance specification.
   
2. If a manufacturer or product is not listed by name within a section of the specifications, the manufacture must obtain prior approval from the Architect before that product will be allowed for use on the project.
   
3. If the Architect prior approves a manufacturer or product, the manufacturer will be considered as a listed manufacturer and will assume all the listed responsibilities that a listed manufacturer has.
   
4. This specification is drafted from the “Tech-Guard” U.L. classified roof system.

SUBMITTALS/QUALIFICATIONS:

1. General: Submittal requirements are specified in Section 01300-Submittals.
   
2. Submit evidence that the Polyurethane insulation, together with the TECHGUARD waterproofing and protection system, has been tested as a composite roof system in accordance with UL-790 and UBC 32-7 test methods. The system shall meet U.L. 1256 Construction Method #206 (UBC 17-4), Roof Deck construction assembly/wind uplift ratings as applicable.
   
3. Submit evidence that bidders are qualified and manufacturer approved to install TECHGUARD system.
   
4. TECHGUARD specifications are based on physical properties necessary when high resistance to physical damage is required.
   
5. Submit technical data sheets, independent testing reports and supplier- contractor warranty for TECHGUARD systems.
   
6. Submit evidence that system constituents are non-coal tar, non-asphaltic, are V.O.C. compliant and environmentally safe.
   
7. Polyurethane Foam insulating system shall be freon free, HFC product. Foam must be approved per U.L. 723 testing. Foam Must utilize E.P.A. approved 245 FA or Pentane as the blowing agent.

QUALITY ASSURANCE:

1. Pre-Application Roofing Conference: Approximately two weeks prior to installation of roof deck, meet at project site with installers of deck or substrate construction to receive roofing work, installers of roof-top units and other work in and around roofing which must precede or follow roofing work (including mechanical work if any), Architect, Owner, roofing system manufacturer’s representative, and other representatives directly concerned with performance of the work. Record agreements or disagreements reached and furnish a copy of records to each party attending. Review foreseeable methods and procedures related to roofing work, including, but not limited to the following:

1. Tour representative areas of roofing substrates (decks), inspect and discuss condition of substrate, roof drains, curbs, penetrations and other preparatory work performed by other trades.
2. Review structural loading limitations of steel deck and inspect deck for loss of flatness and for required mechanical fastening.
3. Review roofing system requirements (drawings, specifications and other contract documents).
4. Review and finalize construction schedule related to roofing work and verify availability of materials, installer’s personnel, equipment and facilities needed to make progress and avoid delays.
5. Review required inspection, testing, certifying and material usage accounting procedures.
6. Review weather and forecasted weather conditions, and procedures for coping with unfavorable conditions, including possibility of temporary roofing (if not a mandatory requirement).
   
2. Manufacturer Qualifications:
   
   1. Manufacturer shall be a basic producer of Polyurethane Foam roofing materials.
   2. Manufacturer shall have demonstrated commitment to the roofing profession by membership in one or more of the following professional organizations:
      1. Polyurethane Foam Contractors Division (PFCD) of SPI.
      2. Roof Consultant Institute, (RCI) - Associate Member.
      3. Western States Roofing Contractors Association, (WSRCA).
      4. National roofing Contractors Association, (NRCA).
      5. Arizona Roofing Contractors Association (ARCA).
3. Contractor Qualifications:
   
   1. Contractor shall be certified in writing by Polyurethane Foam supplier prior to commencement of work.
   2. Contractor shall have demonstrated commitment to the roofing profession by membership in one or more of the following professional organizations:
      1. Polyurethane Foam Contractors Division (PFCD) of SPI.
      2. National Roofing Contractors Association, (NRCA).
      3. Arizona Roofing Contractors Association, (ARCA).
      4. Contractor Accreditation by the Polyurethane Foam Contractors Division (PFCD) of SPI is strongly encouraged.
   3. Prior experience in handling and spraying Polyurethane Foam of the type specified and possessing a thorough knowledge in the use of the required spray equipment.
   4. Approved by the protective coating manufacturer for single component system and shall qualify for all warranty programs offered by coating manufacturer.
      
4. Workmen Qualifications:
   
   1. Trained by the Polyurethane Foam manufacturer with minimum of five years experience in spray application of Polyurethane Foam roofing with at least 1,000,000 square feet of applied roof coating.
   2. Individual mechanics shall be work experienced and regularly engaged in the spray application of Polyurethane Foam roofing systems.
      
5. Regulatory Requirements:
   
   1. Polyurethane Foam insulation and protective coating shall have been tested by UL and bear a UL 723 or E-84 Class A label for fire resistance.
   2. The Class-A, certification shall apply to a combustible deck with not less than one inch thickness of Polyurethane Foam, top coated with the protective coating system as set forth within.
   3. Insure all system constituent material containers are UL labeled as per UL follow up service agreement.
      
6. Composite roof covering must be tested and pass per UL 790 Criteria.
   
7. Yearly inspections during the duration of the guarantee shall be provided to owner by the waterproofing coating representative at a designated time by the owner and the contractor.
   
8. Polymer Certificate:
   
   1. Elastomeric Protective Coating Resin Component shall be specifically formulated and certified for use over spray applied Polyurethane Foam Roof Systems, to insure maximum adhesion under adverse weather conditions and ponding water applications.
   2. Contractors shall submit a Certificate stating that the Polymer used in their choice of acrylic coating is specifically designed for sprayed Polyurethane Foam Roofing Applications. Certificate must be issued by the manufacturer of the Polymer.
   3. The Certificate issued from the manufacture of Polymer used will be required to validate Roof System Warranty.

WARRANTY

1. Furnish to the Owner a standard five (5) or ten (10) year manufacturer warranty depending on application. To include entire combined foam/coating system.
   
2. Polymer Manufacture Certificate will be required to validate Roof System warranty, Certificate must state that Polymer is specifically formulated and certified for use over spray applied Polyurethane Foam Roofing Systems.

SUBMITTALS:

1. Product Data: Submit manufacturer’s technical product data, installation and maintenance instructions, and written recommendations for roofing work. Include data indicating that the materials comply with all code and manufacturer system requirements.
   
2. Polyurethane insulation, waterproofing materials, aggregates and protective coatings shall be processed and applied, using only that equipment specifically designed for TECHGUARD application.
   
3. All materials shall be stored and protected from excessive heat and cold, in accordance with materials manufacturer’s instructions.
   
4. Provide verification that products approved are products installed on the job.
   
5. Deliver materials to site in manufactures original unopened packages with labels intact.

INSPECTIONS:

1. Manufacturer’s representative is to provide a “pre-project inspection report” prior to any work commencing.
   
2. At the completion of the roofing project, manufacturer’s representative is to provide a “Completed Project” inspection report.
   
3. Roofing Contractor shall assume responsibility for acceptance of substrate by application of the roofing.

PRIMER:

1. Shall be manufacturer recommended and applied at a rate of 300 square feet per gallon. Priming materials and quantities shall be provided per manufacturer’s recommendations.

POLYURETHANE FOAM INSULATION:

1. Polyurethane Foam Insulation shall be a two-component HFC 245 FA or Pentane blown system designed for spray nozzle mixing and application resulting in a high quality, monolithic rigid Polyurethane, meeting the following physical and performance properties:
   1. Nominal Density (ASTM D 1622): 2.8 to 3.2 lbs./cu ft. minimum.
   2. Compressive Strength (ASTM D 1621): 50 psi minimum.
   3. Tensile Strength (ASTM D 1623): 75 psi minimum.
   4. Closed Cell Content (ASTM D 2856): 95% by volume.
   5. R-Value (ASTM C 518): 6.25 aged.
   6. Flammability (ASTM E 84/UL 723): less than 35 flame spread
      
2. Polyurethane Foam shall be appropriate grade for the time of year that the installation takes place.
   
3. The appropriate grade of Pro-Tech Foam 2.8 density Polyurethane Foam is acceptable.

PROTECTIVE COATING

1. Protective Coating: Pro-Tech Products, Inc. EC-100 manufactured with EC-1791 meeting the following physical and performance properties:
2. Protective coating shall meet D-6083 testing. Manufacturer shall submit evidence of 6083 testing by approved lab. Lab cannot be resin manufacturer.
   1. Elongation
      1. Initial Elongation @ 73˚ F D-2370 = 210%
      2. Initial Elongation @ 0˚ F D-2370 = 16%
      3. Elongation after Weathering @ 73˚ F D-2370 = 160%
   2. Tensile
      1. Tensile Strength @ 73˚ F D-2370 = 350 PSI
      2. Tensile Strength @ 0˚ F D-2370 = 2573 PSI
   3. Permeance D-1653 = 7.03 perms
   4. Water Swelling D-471 = 5.14%
   5. Fungi Resistance G-21 = zero
   6. Tear Resistance D-624 = 63.041 BF
   7. Low Temp Flexibility (after aging) D-522 = Pass ½” mandrel bend.
   8. Weathering (1000 hrs xenon) = Pass no cracking or checking.
   9. Fire Rating
      1. UL 790 Class A

AGGREGATE

1. Shall be screened and sized specifically for use in TECHGUARD system.

CEMENTITIOUS FIREPROOF/HIGH PHYSICAL ABUSE TRAFFIC TOPPING

1. Shall be manufactured specifically for use with TECHGUARD system.
   
2. Part A consisting of a dry cementitious asbestos-free power compound.Part A consisting of a dry cementitious asbestos-free power compound.
   
3. Part B shall be a Pure Acrylic Emulsion containing no styrene or styrene butadiene.
   
4. Shall be applied in two separate passes resulting in an average 1/8” to 1/4” (7-8 gallons per 100 s.f.) thickness
   
5. Physical properties shall be as follows:

1. Reflectance
   1. ASTM E424-71 - .86
2. UV Resistance
   1. ASTM D-822 – 2,000 hr./No effect
3. High Temperature Stability
   1. ASTM D-794 – No Effect
4. Solar Reflectance (Rs)
   1. ASHRAE Standard - .75
5. Solar Absorbtion (As)
   1. ASHRAE Standard - .25

FLASHINGS AND EXPANSION JOINTS

1. Sheet Metal Flashings: In accordance with Section 07600
   
2. Sealants: In accordance with Section 07600
   
3. Adhesives, Sealant, Metals, Vents and Drains or any composite part of the roof systems shall be those recommended by the systems manufacturer.
   
4. Flashings and waterproof coverings for expansion joints shall be compatible with specified Polyurethane insulation and elastomeric coating system and recommended by the manufactures of the systems used.
   
5. Granules (if used): size and type recommended by manufacturer and applied in the top coat as recommended by the manufacturer.

EQUIPTMENT

1. Polyurethane Foam shall be applied using proportioning equipment, which provides thermostatically controlled material temperatures as recommended by the foam manufacturer.
   
   1. Hoses between the proportioner and spray gun shall be temperature controlled.
   2. Contractor shall not change the formulation ratio of the spray equipment.
   3. Contractor shall not be allowed to use a refrigerant injection system.
   4. When cleaning or servicing spray gun, exercise extreme care so as not to contaminate roof surface with solvents.
      
2. Other Equipment: Contractor shall have at all times in close proximity to the spraying operation sufficient containers to counteract any equipment problem without depositing any defective material on the deck or on the site.

EXAMINATION

1. Verification of Conditions: Examine subsurface to receive work and report detrimental conditions in writing to architect.
   
   1. Prior to the application of any roofing materials, the Contractor shall examine the roof deck, flashings, and other surfaces that are to receive roofing materials to ensure that surfaces are true, even, dry, clean and in proper condition to receive the roofing system.
   2. All penetrations through roofing including drains, scuppers, miscellaneous pipe and vent penetrations, and electrical conduits shall be completed prior to the commencement of work.
   3. The Contractor shall report in writing to the Owner any condition not to the Contractor’s satisfaction prior to proceeding with the work of this section.
   4. Application of roofing material shall constitute the roofing Contractor’s acceptance of surfaces and flashing to receive the materials.
      
2. Commencement of work will be construed as acceptance of subsurfaces.
   
3. Coordination: Coordinate with other work or trades, which affects, connects with or will be concealed by this work.

PREPARATION

1. Notify the owner’s representative and visitors to the site of potential fugitive overspray.
   
2. Cars, etc., will be moved or covered to prevent inadvertent spraying. Contractor shall coordinate subcontractor traffic during roof operations.
   
3. Provide all barricades as required and place them in a way to be considered by all parties in an adequate and sufficient number so that there is no doubt that the area is completely barricaded off.
   
4. Use appropriate barricading methods to shelter walking traffic from the work area’s equipment and overspray.
   
5. Any damage caused during this construction process shall be restored to pre-project condition or replaced at the Contractor’s expense in accordance with section 01010.
   
6. Provide protective covering as needed to protect building walls, adjacent structures and vegetation, etc., from the effects of the spraying process.
   
7. Provide protective covering as needed to protect building walls, adjacent structures and vegetation, etc., from the effects of the spraying process.

APPLICATION

1. Polyurethane Foam:
   
   1. Liquid components of the sprayed in place Polyurethane Foam shall be maintained, metered and sprayed under conditions prescribed by the manufacturer of the material and the manufacturer of the spray equipment.
   2. Spray in a manner to achieve a full and proper spray pattern. Foam shall be applied in minimum 1/2 inch thick passes to achieve the specified thickness.
   3. Apply in multiple passes only in as many squares each day as can be completed to the fully specified thickness on the same day. Before resuming spraying operation on the next day, inspect the exposed deck area to be certain it is moisture free.
   4. Surface texture and quality: Cured Polyurethane Foam shall range from a smoother to a heavy “orange peel” finish. Textures described as “popcorn” or “tree bark” or, surfaces, which exhibit crevices, voids and widespread defects are not acceptable.
   5. There shall be no soft or spongy areas with hard or brittle strings, or improperly proportioned material.
6. Tapered areas of varying thickness shall be as indicated on drawings.
7. Minimum foam thickness over horizontal foam roof shall be noted on drawings.
   
2. Protective Coating:
   
   1. Preparation:
      
      1. The Polyurethane Foam surface and adjacent surface to be coated shall be completely free of any degraded foam, foam overspray, grease, oil, dirt or other contaminates which will interfere with proper coating adhesion.
   Surface shall be completely dry and frost-free before coating.
   3. Any physical damage to the Polyurethane Foam shall be repaired before coating application commences.
   4. Oxidized Polyurethane Foam shall be repaired or replaced.
   5. Where foam surface has been sanded, planed or trimmed and skin removed, those areas shall be given an additional application of base coat immediately after exposure and prior to applying normal base coat to entire area.
      
   2. Waterproofing Protective Coating System:
      
      1. Fluid Applied Waterproofing
         1. Spray apply elastomeric membrane over insulation at a rate of 1 1/2 gallon per 100 s.f.in one application on all horizontal surfaces.
         2. Spray apply final application of elastomeric membrane over insulation at 1 1/2 gallons per 100 s.f., excluding aggregate. The coating shall be an average dry film thickness of 25 mils.
         3. Spray or roll a fluid applied coating over the foam insulation at all parapets walls and other vertical surfaces in three applications at a rate of 11/4 gallons per 100 s.f. per application (i.e., two base coats and one top coat). To have an average dry film thickness of 30 mils.
            
      2. Aggregate
         1. Broadcast #6 aggregate into final fluid membrane coat at the rate of 62 lbs. per 100 s.f.
      3. Protective-Reflective Surface
         1. Shall be applied in two separate passes resulting in an average 1/8” to 1/4” (7-8 gallons per 100 s.f.) thickness.
      4. No traffic shall be permitted on completed roof surface for a minimum of three (3) days.
         
   3. Protective coating shall extend up and over all Polyurethane Foam on vent pipes, parapets and other penetrations and shall be terminated a minimum of 3 inches above the foam creating a self-terminating flashing.
      
   4. During coating application, the film thickness applied each day shall be measured by the applicator and recorded on a Daily Quality Report Foam (optional-discussed at Pre-Roofing Conference).
      
   5. Surfaces shall be free from voids, pinholes, and blisters.

FIELD QUALITY CONTROL

1. Inspections by Roofing Manufacturer’s Representative:
   
   1. The manufacturers’ representative for the materials used on this project shall make inspections as outlined by the manufacturer as required to provide the specified warranty.
   2. In addition to the inspections required for the warranty, the following inspections shall be required:
   Preliminary deck inspection
   2. One unannounced spot inspection
   3. Final inspection
   Certificate from Polymer manufacturer
   
2. Core Sampling:
   
   1. The Owner reserves the right to take core samples to determine if the Polyurethane Foam meets the minimum density as specified and is properly bonded to the substrate.
   2. Location of core samples shall be as directed by the Owner.
   3. Foam Core samples, if required, shall be cut by the Contractor prior to application of the protective coating and after all exothermic heat is gone.
   4. Costs associated with the cutting of Foam Core samples, and repairs of cut-out foam sections shall be borne by the Contractor.
   5. Costs associated with testing the in place density shall of the foam be paid for by the Owner. Tests shall be performed by an independent laboratory in accordance with ASTM D 1622.
   6. Foam truck must be on site for foam core sampling to reduce setup cost.
      
3. Random Core Sampling:
   
   1. Random slit sampling, if necessary, must be performed by independent and accredited spray Polyurethane roof consultant to verify initial basecoat millage is per specification. All costs incurred shall be borne by the Roofing Contractor.
   2. Random depth analysis shall consist of mechanical probe inserted into slit sample area for initial basecoat millage verification. Then caulk slit sample area with suitable urethane caulk of single component nature.
   3. There shall be no slit samples taken after the final acrylic topcoat is applied or after the cemetitious topping is applied so as not to compromise the final finished membrane.
   4. If final millage of acrylic topcoat or cemetitious topping is required, it must be done onsite by volume solids mathematical means and wet film gauge during application.
   5. Installing contractor must be notified 48 hours minimum prior to coring and must be present during coring process.

CLEANING

1. During the course of the Work and on completion of the Work, remove and dispose of excess materials, equipment and debris away from premises. Leave Work in clean condition in accordance with Section 01500.