OU-RAC-Roof-Roof-Restoration-Technical Spec Oct 22 2025.docx

Technical Specifications Oakland University-Facility Management

Recreation & Athletics Center-Roof #4

Roof Restoration

MAINTENANCE CLEANING OF MEMBRANE ROOFING: This custom TremSpec section specifies Tremco RoofTec environmentally-compliant cleaning processes for single ply membrane roofs intended to prolong their life, restore their solar reflectance, and prepare them for rehabilitation coatings. These processes typically apply to thermoplastic membranes.

SECTION 070150.16 - MAINTENANCE CLEANING OF MEMBRANE ROOFING

GENERAL

SUMMARY

Section Includes:

Pressure washing of roof membrane including membrane flashings, with full water reclamation.

Related Requirements:

Retain subparagraphs below to cross-reference requirements Contractor might expect to find in this Section but are specified in other Sections.

Division 07 roofing rehabilitation section for repair and restoration coating of roofing membranes.

INFORMATIONAL SUBMITTALS

Work Plan: For maintenance cleaning, including description of means and methods for water reclamation.

QUALITY ASSURANCE

Operator Qualifications: Trained and approved by manufacturer of cleaning equipment, with a record of successful roofing membrane cleaning.

Regulatory Requirements: Comply with governing EPA regulations. Comply with hauling and disposal regulations of authorities having jurisdiction.

PROJECT / FIELD CONDITIONS

Owner will occupy portions of building immediately below roof area to be maintained. Conduct operations so Owner's operations are not disrupted. Provide Owner with not less than 72 hours' notice of activities that may affect Owner's operations.

Protect building to be cleaned, adjacent buildings, walkways, site improvements, exterior plantings, and landscaping from damage or soiling from maintenance operations.

Maintain access to existing walkways, corridors, and other adjacent occupied or used facilities.

PRODUCTS

CLEANING SYSTEM OPERATORS

Source Limitations: Engage a qualified roofing maintenance cleaning firm to perform cleaning of membrane roofing.

Approved Operators: Beachwood OH, (800) 562-2728, Tremco, Inc., RoofTec Cleaning Systems.

MATERIALS

Pre-cleaning Treatment: Detergent-free.

Product: Tremco, Inc., RoofTec PREKLEEN.

Pressure Wash Cleaning Solution: VOC, detergent, phosphate, and surfactant free.

Product: Tremco, Inc., RoofTec RENEW Cleaner.

EXECUTION

PREPARATION

Comply with warranty requirements of existing roof membrane manufacturer.

Shut off rooftop utilities and service piping before beginning the Work.

Test existing roof drains to verify that they are not blocked or restricted. Immediately notify Owner of any blockages or restrictions.

Depending on duration of equipment shutdown and occupancy of building, revise first paragraph below if necessary to specify special work hours (e.g., nights or weekends) for portions of roof near air intakes. If necessary to deactivate all or a portion of fire-detection system, revise paragraph to add special measures, such as a fire watch.

Coordinate with Owner to shut down air-intake equipment in the vicinity of the Work. Cover air-intake louvers before proceeding with maintenance cleaning work that could affect indoor air quality or activate smoke detectors in the ductwork.

Maintain roof drains in functioning condition to ensure roof drainage at end of each workday. Prevent debris from entering or blocking roof drains and conductors.

MAINTENANCE CLEANING OF ROOF MEMBRANE

Pretreat membrane and flashings when recommended by cleaning equipment manufacturer based upon site assessment of membrane condition.

Apply pressure wash cleaning solution onto membrane and flashing surfaces.

Pressure wash membrane and flashings using equipment and methods recommended in writing by cleaning equipment manufacturer for specific application. Utilize rotating wash head equipment operated at not less than 2,000 psi. Use equipment utilizing vacuum removal of wash water and residues.

DISPOSAL

Collect cleaning water and associated cleaning compounds and residual material and process to meet US EPA and local environmental requirements for legal discharge.

Technical Specifications Oakland University-Facility Management

Recreation & Athletics Center-Roof #4

Roof Restoration

END OF SECTION 070150.16

070150.16 - Page 2 of 2

MAINTENANCE CLEANING OF MEMBRANE ROOFING

SECTION 070150.74 - REHABILITATION OF SINGLE PLY ROOFING

REHABILITATION OF SINGLE PLY ROOFING (ALPHAGUARD): This custom Tremco MasterSpec-based section specifies preparations for rehabilitation of single ply membranes, including minor repair and reinforcing of existing membrane roofing and flashing, and application of roof coating based upon Tremco reinforced AlphaGuard MT/MTS, AlphaGuard Bio, AlphaGuard PUMA and AlphaGuard Bio NR non-reinforced systems.

This system may be used with aged PVC, TPO, EPDM, Hypalon (CSPE), and PIB membranes. It is not intended for roof membranes that have reached the end of their service life, nor for new membranes until subject to a minimum of 6 months weathering, nor for ponding conditions. Existing membrane coatings must be removed, and coating adhesion verified.

For application of other non-urethane Tremco coating and restoration products over existing single ply roofing, use Section 07 01 50.74 REHABILITATION OF SINGLE-PLY ROOFING

GENERAL

SUMMARY

This Section includes the following:

Adjust list below to suit Project.

Roof membrane coating preparation for Oakland University-RAC Roof #4.

Application of reinforced fluid-applied roof membrane and flashings over existing fully adhered EPDM membrane roof.

Allowances: Refer to Division 01 Section "Allowances" for description of Work in this Section affected by allowances.

Unit Prices: Refer to Division 01 Section "Unit Prices" for description of Work in this Section affected by unit prices.

ROOFING CONFERENCES

Roofing Rehabilitation Preinstallation Conference: Conduct conference at Project site to review methods and procedures related to roofing system.

Review temporary protection requirements for existing roofing system that is to remain uncoated, during and after installation.

Review methods and procedures related to re-coating preparation, including coating manufacturer's written instructions.

Review roof drainage during each stage of coating and review roof drain plugging and plug removal procedures.

Review and finalize construction schedule, and verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays.

Review base flashings, special roofing details, drainage, penetrations, equipment curbs, and condition of other construction that will affect coating.

Review existing conditions that may require notification of Owner before proceeding.

MATERIALS OWNERSHIP

Demolished materials shall become Contractor's property and shall be removed from Project site.

DEFINITIONS

Retain definitions and terms that remain after this Section has been edited.

Roofing Terminology: Refer to ASTM D1079 "Standard Terminology Relating to Roofing and Waterproofing" and glossary in NRCA's "The NRCA Roofing Manual: Membrane Roof Systems" for definition of terms related to roofing work in this Section.

Roofing Coating Preparation: Existing roofing that is to remain and be prepared to accept restorative coating application.

Patching: Removal of a portion of existing membrane roofing system from deck or removal of selected components and accessories from existing membrane roofing system and replacement with similar materials.

Remove: Detach items from existing construction and legally dispose of them off-site unless indicated to be removed and reinstalled.

Existing to Remain: Existing items of construction that are not indicated to be removed.

INFORMATIONAL SUBMITTALS

Contractor's Product Certificate: Submit notarized certificate, indicating products intended for Work of this Section, including product names and numbers and manufacturers' names, with statement indicating that products to be provided meet the requirements of the Contract Documents.

Provide manufacturer's UL listing certificate for roofing system.

Product Test Reports: Based on evaluation of comprehensive tests performed by manufacturer and witnessed by a qualified testing agency, for components of roofing rehabilitation system.

Qualification Data: For Installer, Manufacturer, and Roofing Inspector.

Letter written for this Project indicating manufacturer approval of Installer to apply specified products and provide specified warranty.

Warranties: Unexecuted sample copies of special warranties.

Photographs or Video Recordings: Show existing conditions of adjoining construction and site improvements, including exterior and interior finish surfaces, which might be misconstrued as having been damaged by rehabilitation operations. Submit before Work begins.

Proposed Protection Measures: Submit report, including Drawings, that indicates the measures proposed for protecting individuals and property, for environmental protection, and for dust control. Indicate proposed locations and construction of barriers.

Inspection Reports: Reports of Roofing Inspector. Include weather conditions, description of work performed, tests performed, defective work observed, and corrective actions required and carried out.

Submit report within 48 hours after inspection.

CLOSEOUT SUBMITTALS

Maintenance Data: To include in maintenance manuals.

Warranties: Executed copies of approved warranty forms.

QUALITY ASSURANCE

Installer Qualifications: An employer of workers trained and certified by manufacturer, including a full-time on-site supervisor with a minimum of three years' experience installing products similar to those specified, able to communicate verbally with Contractor, Architect, and employees, and the following:

Qualified by the manufacturer to install manufacturer's product and furnish warranty of type specified.

Manufacturer Qualifications: Primary product manufacturer that is UL listed for roofing system identical to that specified for this Project with minimum five years' experience in manufacture of comparable products in successful use in similar applications, and able to furnish warranty with provisions matching specified requirements.

Specifier: Retain paragraph below if Owner allows substitutions but requires strict control over qualifying of substituted manufacturers.

FIELD CONDITIONS

Retain, revise, or delete paragraphs and subparagraphs in this Article to suit Project. Add other limitations if necessary.

Weather Limitations: Proceed with rehabilitation work only when existing and forecasted weather conditions permit Work to proceed without water entering into existing roofing system or building.

Store all materials prior to application at temperatures recommended by manufacturer.

Apply coatings within range of ambient and substrate temperatures recommended by manufacturer.

Do not apply roofing in snow, rain, fog, or mist.

Protect building to be rehabilitated, adjacent buildings, walkways, site improvements, exterior plantings, and landscaping from damage or soiling from rehabilitation operations.

Maintain access to existing walkways, corridors, and other adjacent occupied or used facilities.

Daily Protection: Coordinate installation of roofing so insulation and other components of roofing system not permanently exposed are not subjected to precipitation or left uncovered at the end of the workday or when rain is forecast.

Owner will occupy portions of building immediately below re-coating area. Conduct re-coating so Owner's operations will not be disrupted. Provide Owner with not less than 72 hours' notice of activities that may affect Owner's operations.

WARRANTY

Manufacturer's Warranty: In which manufacturer agrees to repair or replace components of roofing system that fail in materials or workmanship within warranty period, as follows.

Warranty Period: 20 years from date of completion.

Inspections by Manufacturer: To occur every five years following completion.

PRODUCTS

MANUFACTURERS

Manufacturer/Products: By Tremco CPG.

Retain "Source Limitations" Paragraph below if required to comply with FM Global, UL, applicable building code, or to comply with provisions of manufacturer's warranty.

Source Limitations: Obtain components for roofing system from same manufacturer as membrane roofing or manufacturer approved by membrane roofing manufacturer.

PERFORMANCE REQUIREMENTS

General Performance: Rehabilitated roofing shall withstand exposure to weather without failure or leaks due to defective manufacture or installation.

Accelerated Weathering: Roofing system shall withstand 5000 hours of exposure when tested according to ASTM G152, ASTM G154, or ASTM G155.

Material Compatibility: Provide roofing materials that are compatible with one another under conditions of service and application required, as demonstrated by roofing manufacturer based on testing and field experience.

Exterior Fire-Test Exposure: Roofing system exterior fire-test exposure performance following application of rehabilitation coating shall be not be less than that of the prerehabilitated roof performance when tested in accordance with ASTM E108, based upon manufacturer's tests of identical applications.

Retain one or more of the following paragraphs below to specify "cool-roof" performance. Verify that selected top coat product complies with requirements.

Energy Performance Paragraph below applies to initial SRI requirement for LEED v4 for slopes under 2:12. Edit required minimum SRI based upon Project requirements.

Energy Performance: Provide rehabilitated roof meeting initial solar reflectance of 75 when calculated according to ASTM E1980.

Retain "Energy Performance" Paragraph below for roofs that must comply with local "cool-roof" energy legislation; verify requirements with authorities having jurisdiction. Example and options below are for low-slope roofs that must comply with prescriptive approach of CCR Title 24 (California Building Standards Code). Verify that selected product meets requirement.

Energy Performance: Provide rehabilitated roofing according to the following when tested according to CRRC-1:

Three-year, aged solar reflectance of not less than 0.55 and emissivity of not less than 0.75.

Retain "Bio-Based Content" Paragraph below if utilizing AlphaGuard Bio to meet Federal or Project requirements for bio-based material.

Bio-Based Content: Provide roofing rehabilitation coating materials meeting requirements of USDA Bio-based Affirmative Procurement Program, with not less than 20 percent bio-based content.

MATERIALS, GENERAL

General: Rehabilitation materials recommended by roofing system manufacturer for intended use and compatible with components of existing membrane roofing system.

Infill Materials: Where required to replace test cores and to patch existing roofing, use infill materials matching existing membrane roofing system materials, unless otherwise indicated.

Temporary Roof Drainage: Design and selection of materials for temporary roof drainage are responsibilities of the Contractor.

FLUID-APPLIED ROOFING MEMBRANE COATING

Polyurethane Elastomeric Fluid-Applied System: Two-coat fluid-applied roofing membrane formulated for application over prepared existing roofing substrate.

Polyurethane Roof Coating System Base Coat: Bio-based, low-odor low-VOC two-part, for use with a compatible top coat.

Product: Tremco, Alpha-Guard BIO Base Coat.

Combustion Characteristics, UL 790: Maintains combustion characteristics of existing roof system.

Volatile Organic Compounds (VOC), maximum, ASTM D3960: 1 g/L.

Accelerated Weathering, 5000 hours, ASTM G154: Pass.

Hardness, Shore A, minimum, ASTM D2240: 80.

Solids, by volume, ASTM D2697: 100 percent.

Bio-Based Content, Minimum: 70 percent.

Polyurethane roof coating system top coat, bio-based low-odor low-VOC two-part, for application over compatible base coat.

Product: Tremco, Alpha-Guard BIO Top Coat.

Combustion Characteristics, UL790: Maintains combustion characteristics of existing roof system.

Volatile Organic Compounds (VOC), maximum, ASTM D3960: 6 g/L.

Solar Reflectance Index (SRI), ASTM E1980: For white, not less than 103.

Accelerated Weathering, 5000 hours, ASTM G 154: Pass.

Hardness, Shore A, minimum, ASTM D2240: 81.

Solids, by volume, ASTM D2697: 100 percent.

Bio-Based Content, Minimum: 60 percent.

Minimum Thickness, reinforced system: 32 mils (0.81 mm) wet.

Color: White.

Primers:

Primer for Asphaltic and Single-Ply Membranes: Water-based, polymer-modified quick-dry low odor primer.

Basis of design product: Tremco, Alpha-Guard WB Primer.

Volatile Organic Compounds (VOC), maximum, ASTM D3960: 1 g/L.

Solids, by weight: 70 percent.

Fluid-Applied Roofing Reinforcing Fabric:

Polyester Reinforcing and Protection Fabric: 100 percent stitch-bonded mildew-resistant polyester fabric intended for reinforcement of compatible fluid-applied membranes and flashings and as a protection layer under pavers or stone aggregates.

Product: Tremco, Permafab.

Tensile Strength, Minimum, ASTM D1682: 50 lbf (23 kg) avg..

Elongation, Minimum, ASTM D1682: 60 percent.

Tear Strength, Minimum, ASTM D1117: 16 lbf (7.3 kg) avg..

Weight: 3 oz./sq. yd (102 g/sq. m).

AUXILIARY ROOFING REHABILITATION MATERIALS

General: Auxiliary materials recommended by roofing system manufacturer for intended use and compatible with existing roofing system and roofing coating system.

Seam Sealer: Waterproof seam and patching material compatible with applied coating.

Seam Sealer: Aliphatic polyurethane sealer, single-component, moisture curing, high solids, low-VOC, formulated for compatibility and use with specified roofing substrates.

Basis of design product: Tremco, SOLAR-GARD Seam Sealer.

Volatile Organic Compounds (VOC), maximum, ASTM D3960: 75 g/L.

Tensile Strength, ASTM D412: 270 psi (1860 kPa).

Tear Strength, ASTM D412: 35 pli (6 kN/m).

Elongation, ASTM D412: 700 percent.

Color: White.

Seam and Detail Reinforcing Fabric:

Polyester Reinforcing and Protection Fabric: 100 percent stitch-bonded mildew-resistant polyester fabric intended for reinforcement of compatible fluid-applied membranes and flashings and as a protection layer under pavers or stone aggregates.

Basis of design product: Tremco, Permafab.

Tensile Strength, Minimum, ASTM D1682: 50 lbf (23 kg) avg..

Elongation, Minimum, ASTM D1682: 60 percent.

Tear Strength, Minimum, ASTM D1117: 16 lbf (7.3 kg) avg..

Weight: 3 oz./sq. yd (102 g/sq. m).

Joint Sealant: Elastomeric joint sealant compatible with applied coating, with movement capability appropriate for application.

Joint Sealant, Polyurethane: ASTM C920, Type S, Grade NS, Class 50 single-component moisture curing sealant, formulated for compatibility and use in dynamic and static joints; paintable.

Product: Tremco, TremSEAL Pro.

Volatile Organic Compounds (VOC), maximum, ASTM D3960: 40 g/L.

Hardness, Shore A, ASTM C661: 40.

Adhesion to Concrete, ASTM C794: 35 pli.

Tensile Strength, ASTM D412: 350 psi (2410 kPa).

Color: White.

Miscellaneous Accessories: Provide miscellaneous accessories recommended by roofing system manufacturer.

Only AlphaGuard Slip-Resistant Walkway Top-coat with Sand or Granules; or Fibergrate FRP Molded walkways are permitted over Tremco AlphaGuard systems. Retain applicable paragraph(s).

WALKWAYS

Slip Resistant Product for Fluid-Applied Walkways:

Aggregate, Slip Resistant Silica Sand: Silica sand, broadcast into fluid-applied roof coating products for use as aggregate fill for slip-resistant, abrasion-resistant coating applications.

Basis of design product: Aggregate, Slip Resistant Silica Sand.

Size: 20 - 40 mesh.

Application Rate: Minimum 20 lb/100 sq ft (1 k/m2).

EXECUTION

EXAMINATION

Examine existing roofing substrates, with Installer present, for compliance with requirements and for other conditions affecting application and performance of roof coatings For the record, prepare written report, endorsed by Installer, listing conditions detrimental to performance.

Verify compatibility with and suitability of substrates.

Verify that substrates are visibly dry and free of moisture.

Verify that roofing membrane surfaces have adequately aged to enable proper bond with base coat.

Verify that roofing membrane is free of blisters, splits, open laps, indications of shrinkage, and puncture damage or other indications of impending roof system failure.

Commencing application of coatings indicates acceptance of surfaces and conditions.

PREPARATION

Retain and edit paragraphs and subparagraphs below that correspond to project conditions.

Protect existing roofing system that is indicated not to be rehabilitated, and adjacent portions of building and building equipment.

Mask surfaces to be protected. Seal joints subject to infiltration by coating materials.

Limit traffic and material storage to areas of existing roofing membrane that have been protected.

Maintain temporary protection and leave in place until replacement roofing has been completed.

Shut down air intake equipment in the vicinity of the Work in coordination with the Owner. Cover air intake louvers before proceeding with coating work that could affect indoor air quality or activate smoke detectors in the ductwork.

Verify that rooftop utilities and service piping affected by the Work have been shut off before commencing Work.

Maintain roof drains in functioning condition to ensure roof drainage at end of each workday. Prevent debris from entering or blocking roof drains and conductors. Use roof-drain plugs specifically designed for this purpose. Remove roof-drain plugs at end of each workday, when no work is taking place, or when rain is forecast.

Do not permit water to enter into or under existing membrane roofing system components that are to remain.

ROOFING COATING PREPARATION

Retain "Roofing Partial Tear-off and Patching" Paragraph below when Project also requires extensive patching or tear-off and rebuilding of portions of the existing roofing membrane or flashing.

Roofing Partial Tear-off and Patching: Roof area to bespot replaced per attached IR roof plan.

Delete "Roofing Partial Tear-off and Patching" Paragraph above and retain "Removal of Wet Insulation" Paragraph below when extent of wet insulation is minor in scope.

Removal of Wet Insulation: Remove portions of roofing membrane with underlying wet insulation. Remove wet insulation, fill in tear-off areas to match existing insulation and membrane, and prepare patched membrane for application of roof coating as specified below.

Retain "Repair of Ponding Areas" Paragraph below if preconstruction investigation and Drawings indicate presence of areas of roof with inadequate drainage.

Membrane Surface Preparation:

Remove blisters, ridges, buckles, roofing membrane fastener buttons projecting above the membrane, and other substrate irregularities from existing roofing membrane that would inhibit application of uniform, waterproof coating.

Broom clean existing substrate.

Select one of two "Substrate Cleaning" Paragraphs below. First utilizes Tremco RoofTec Cleaning Systems with 100 percent water reclamation.

Substrate Cleaning: Clean substrate in accordance with requirements of Division 07 Section "Maintenance Cleaning of Membrane Roofing."

Substrate Cleaning: Clean substrate of contaminants such as dirt, debris, oil, and grease that can affect adhesion of coating by power washing at maximum 2,000 psi (13,800 kPa).

Dispose of waste water in accordance with requirements of authorities having jurisdiction.

Verify that existing substrate is dry before proceeding with application of coating. Spot check substrates with an electrical capacitance moisture-detection meter.

Verify adhesion of new products.

Existing Flashing and Detail Preparation: Repair flashings, gravel stops, copings, and other roof-related sheet metal and trim elements. Reseal joints, replace loose or missing fasteners, and replace components where required to leave in a watertight condition.

Surface Priming: Prime surfaces to receive fluid-applied coating using coating manufacturer's recommended product for surface material. Apply at application rate recommended by manufacturer.

Ensure primer does not puddle and substrate has complete coverage.

Allow to cure completely prior to application of coating.

Retain "Membrane Repair" and "Seam Reinforcement" Paragraphs below if utilizing AlphaGuard NR non-reinforced system requiring reinforcement at membrane repair sites and existing roofing seams only.

Membrane Repair: Repair membrane at locations with irregularities using seam sealer mastic and reinforcing fabric.

Membrane Seam Reinforcement: Reinforce membrane seams using seam sealer mastic and reinforcing fabric overlapping onto field of existing membrane not less than width required by roof coating manufacturer.

FLUID-APPLIED FLASHING APPLICATION

Fluid-Applied Flashing and Detail Base Coat Application: Complete base coat and fabric reinforcement at parapets, curbs, penetrations, and drains prior to application of field of fluid-applied membrane. Apply base coat in accordance with manufacturer's written instructions.

Apply base coat on prepared and primed surfaces and spread coating evenly. Extend coating minimum of 8 inches (200 mm) up vertical surfaces and 4 inches (100 mm) onto horizontal surfaces.

Back roll to achieve minimum coating thickness indicated on Part 2 product listing, unless greater thickness is recommended by manufacturer; verify thickness of base coat as work progresses.

For AG BIO and AG MT, retain "Fabric Reinforcement" Paragraph below if using fabric reinforced coating over existing base flashings.

Reinforcing Fabric: Embed fabric reinforcement into wet base coat. Lap adjacent flashing pieces of fabric minimum 3 inches (75 mm) along edges and 6 inches (150 mm) at end laps.

Roll surface of fabric reinforcing to completely embed and saturate fabric. Leave finished base coat with fabric free of pin holes, voids, or openings.

Roof Drains: Install base coat onto surrounding membrane surface and metal drain bowl flange. Install target piece of fabric reinforcement immediately into wet base coat and roll to fully embed and saturate fabric. Reinstall clamping ring and strainer following application of top coat. Replace broken drain ring clamping bolts.

FLUID-APPLIED MEMBRANE APPLICATION

Fluid-Applied Membrane Base Coat: Apply base coat to field of membrane in accordance with manufacturer's written instructions.

Apply base coat on prepared and primed surfaces and spread coating evenly.

Back roll to achieve minimum coating thickness indicated on Part 2 product listing, unless greater thickness is recommended by manufacturer; verify thickness of base coat as work progresses.

For AG BIO and AG MT, retain first "Fabric Reinforcement" paragraph and subparagraph below; delete for AG BIO NR.

Fabric Reinforcement: Embed fabric reinforcement into wet base coat. Lap adjacent pieces of fabric minimum 3 inches (75 mm) along edges and 6 inches (150 mm) at end laps.

Roll surface of fabric reinforcing to completely embed and saturate fabric. Leave finished base coat with fabric free of pin holes, voids, or openings.

Fluid-Applied Membrane Top Coat: Apply top coat to field of membrane and flashings uniformly in a complete, continuous installation.

Allow base coat to cure prior to application of top coat.

Following curing of base coat and prior to application of top coat, sand raised or exposed edges of fabric reinforcement.

Prime base coat prior to application of top coat if top coat is not applied within 72 hours of the base coat application, using manufacturer's recommended primer.

Apply top coat extending coating up vertical surfaces and out onto horizontal surfaces. Install top coat over field base coat and spread coating evenly.

Back roll to achieve minimum coating thickness indicated on Part 2 product listing, unless greater thickness is recommended by manufacturer; verify thickness of base coat as work progresses.

Avoid foot traffic on new fluid-applied membrane for a minimum of 24 hours.

Only AlphaGuard Slip-Resistant Walkway Top-coat with Sand or Granules; or Fibergrate FRP Molded walkways are permitted over Tremco AlphaGuard systems. Retain applicable paragraph(s).

WALKWAY INSTALLATION

Install walkways following application of coating. Locate as indicated, or as directed by Owner.

Slip-Resistant Walkway Topcoat: Apply walkway second topcoat following application and curing of top coat. Locate as indicated on Drawings.

Mask walkway location with tape.

Prime first top coat prior to application of walkway top coat if walkway top coat is not applied within 72 hours of the first top coat application, using manufacturer's recommended primer.

Apply walkway topcoat and back roll to achieve minimum coating thickness indicated on Part 2 product listing, unless greater thickness is recommended by manufacturer; verify thickness of base coat as work progresses.

Broadcast Slip-Resistant Top Coat Aggregate in wet top coat at rate indicated in Part 2 product listing or as otherwise recommended by coating manufacturer.

Back roll aggregate and top coat creating even dispersal of aggregate. Remove masking immediately.

FIELD QUALITY CONTROL

Choose one of the following two Roof Inspector paragraphs, as applicable. The first paragraph requires the Owner to provide and pay for the services of a Roof Inspector (Sometimes this is required by Owner's policy or by Local Ordinance/Authority.) The second paragraph requires the Contractor to provide and pay for the Roof Inspector. Roof Inspector is defined under Quality Assurance Article. The subsequent Roof Inspection paragraph requires the Contractor to engage the roof membrane manufacturer to inspect the application at key points.

Roofing Inspector: Owner will engage a qualified roofing inspector to perform roof tests and inspections and to prepare test reports.

Roof Inspection: Contractor shall engage roofing system manufacturer's technical personnel to inspect roofing installation, and submit report. Notify Owner 48 hours in advance of dates and times of inspections. Inspect work as follows:

Upon completion of preparation of first component of work, prior to application of re-coating materials.

Following application of re-coating to flashings and application of base coat to field of roof.

Upon completion of re-coating but prior to re-installation of other roofing components.

Repair fluid-applied membrane where test inspections indicate that they do not comply with specified requirements.

Arrange for additional inspections, at Contractor's expense, to verify compliance of replaced or additional work with specified requirements.

PROTECTING AND CLEANING

Protect roofing system from damage and wear during remainder of construction period.

Correct deficiencies in or remove coating that does not comply with requirements, repair substrates, and reapply coating.

Clean overspray and spillage from adjacent construction using cleaning agents and procedures recommended by manufacturer of affected construction.

END OF SECTION 070150.74

070150.74 - Page 1 of 12

REHABILITATION OF SINGLE PLY ROOFING