Attachment_1L_-_Green_Roof_Specifications.pdf

HFLA - PHASE III FACILITY

United States Customs and Border Protection

CORE & SHELL – PACKAGE B1

SECTION 329500 - VEGETATED ROOF ASSEMBLIES

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Continuous vegetated roof assemblies which shall be the same manufacturer as the EPDM Roofing System.

2. Walkway pavers.

B. Related Sections:

1. Division 07 Section "EPDM” for membrane roofing, roof insulation, and membrane roofing warranty.

1.3 DEFINITIONS

A. Captured Water: Water that is retained in the drainage layer of a vegetated roof assembly after new water additions have ceased and that cannot escape the roof except through evaporation or plant transpiration.

B. Finish Elevation: Elevation of finished growing-media surface of planting area.

C. Planting Area: Areas to be planted.

D. Plant, Plants, Plant Material: Vegetation in general, including trees, shrubs, vines, ground covers, ornamental grasses, bulbs, corms, tubers, or herbaceous vegetation.

E. Growing Medium: Manufactured, lightweight soil mixture that promotes good growing conditions for specific varieties of plants.

1.4 SUBMITTALS

A. Product Data: For each vegetated roof assembly and each component, including each growing medium.

B. LEED Submittals:

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1. Product Data for Credit MR 4.1[ and Credit MR 4.2]: For products having recycled content, documentation indicating percentages by weight of postconsumer and preconsumer recycled content. Include statement indicating costs for each product having recycled content.

C. Shop Drawings: For vegetated roof assembly. Include roof plans, slopes, and drain locations;

details of vegetated roof assembly[, walkway pavers] [, geofoam fill] [and] [ accessories];

depth of growing media; and attachments to other work.

D. Samples for Verification: For each of the following components of vegetated roof assembly:

1. Preplanted Vegetative Mat: 12 by 12 inches (300 by 300 mm).

2. Growing Media: 1-pint (0.5-liter) volume of each growing medium, in sealed plastic bags labeled with content and source. Each Sample shall be typical of the lots of growing media to be furnished. Provide an accurate representation of texture and composition.

3. Molded-Sheet Drainage Panels: 12 by 12 inches (300 by 300 mm).

4. Protection Fabric: 12 by 12 inches (300 by 300 mm).

5. Drainage Gravel: 1-pint (0.5-liter) volume in sealed plastic bags labeled with content and source.

6. Root Barrier: 12 by 12 inches (300 by 300 mm).

7. Walkway paver, full size, in each color and texture required; include installation accessories to illustrate assembly.

8. Separation Geotextile: 12 by 12 inches (300 by 300 mm).

9. Access Boxes: One in each size and color required.

10. Soil Retainer: Manufacturer's standard size to verify configuration and color selected.

E. Qualification Data: For qualified Installer.

F. Product Certificates: For each type of manufactured product, from manufacturer, and complying with the following:

1. Manufacturer's certified analysis of standard products.

2. Analysis of other materials by a recognized laboratory, according to methods established by the Association of Official Analytical Chemists, where applicable.

G. Product Test Reports: For each growing medium, including complete analysis demonstrating compliance with specified requirements.

H. Field quality-control reports.

I. Maintenance Data: Recommended maintenance plan including procedures for inspection and care of vegetated roof assembly and plants during a calendar year. Submit before start of required warranty and maintenance periods.

J. Warranty: Sample of[ each] special warranty.

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CORE & SHELL – PACKAGE B1

1.5 QUALITY ASSURANCE

A. Installer Qualifications: A qualified vegetated roof assembly Installer, approved, authorized, or licensed by membrane roofing manufacturer, whose work has resulted in successful establishment of vegetated roofs.

1. Field Supervision: Require Installer to maintain an experienced full-time supervisor on Project site when work is in progress.

2. Professional Membership: Installer shall be a member in good standing of either the Professional Landcare Network or the American Nursery and Landscape Association.

3. Personnel Certifications: Installer's field supervisor shall have certification in the following categories from the Professional Landcare Network:

a. Certified Landscape Technician - Exterior, with installation specialty area(s), designated "CLT-Exterior."

B. Source Limitations: Obtain vegetated roof assembly components from EPDM Roofing System Manufacturerefrom single source from single manufacturer.

C. Preinstallation Conference: Conduct conference at Project site.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Packaged Materials: Deliver packaged materials in original, unopened containers showing weight, certified analysis, name and address of manufacturer, and indication of conformance with state and federal laws if applicable.

B. Bulk Materials:

1. Do not dump or store bulk materials on or near structures, utilities, walkways and pavements, or existing roof areas or plants.

2. Provide erosion-control measures to prevent erosion or displacement of bulk materials, discharge of debris-bearing water runoff, and airborne dust reaching adjacent properties, water conveyance systems, or walkways.

3. Accompany each delivery of bulk materials with product certificates.

1.7 PROJECT CONDITIONS

A. Weather Limitations: Proceed with planting only when existing and forecasted weather conditions permit planting to be performed when optimum results may be obtained. Apply products during favorable weather conditions according to manufacturer's written instructions and warranty requirements.

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CORE & SHELL – PACKAGE B1

1.8 WARRANTIES

A. Special Warranty for Vegetated Roof Assembly: Installer agrees to repair or replace vegetated roof assembly and components that fail in materials or workmanship within specified warranty period.

1. Failure includes, but is not limited to, ponding water or prolonged wetness of growing medium caused as a result of failure of the assembly to properly drain.

2. Warranty Period: Two years from date of Substantial Completion.

1.9 MAINTENANCE SERVICE

A. Initial Maintenance Service: Provide maintenance by skilled employees of vegetated roof assembly Installer approved by membrane roofing manufacturer. Maintain as required in Part 3. Begin maintenance immediately after plants are installed and continue until plantings are acceptably healthy and well established but for not less than the following maintenance period:

1. Maintenance Period: 12 months from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 VEGETATED ROOF ASSEMBLY COMPONENTS

A. Moisture-Retention and Drainage Products:

1. Molded-Sheet Drainage Panels: Manufacturer's standard drainage board formed from geotextile-faced, molded-plastic sheet with a geotextile face and "cups" of the molded sheet facing upward like small reservoirs to retain water while allowing excess water to drain away below the board.

B. Root Barrier: Manufacturer's standard black plastic sheet manufactured from recycled polyethylene or polypropylene plastic; formulated to resist root growth and bacteria.

C. Erosion-Control Fabric: Manufacturer's standard erosion-control fabric.

D. Recycled Content: Provide [moisture-retention mat] [and] [root barrier] <Insert component> material with recycled content so postconsumer recycled content plus one-half of preconsumer recycled content is not less than <Insert number> percent by weight.

2.2 VEGETATED ROOF ASSEMBLIES

A. Continuous Vegetated Roof Assembly Continuous-coverage assembly consisting of manufacturer's standard vegetated roof assembly components for installation over membrane roofing.

1. Products: Subject to compliance with requirements, provide the following:

VEGETATED ROOF ASSEMBLIES 329500 - 4

a. Carlisle SynTec Incorporated; Medium Assembly Roof Garden.

2. Assembly Depth, Nominal: As shown on Drawings, including growing medium.

3. Plantings: Preplanted vegetative mat as selected by Architect from manufacturer's standard mixes.

2.3 MANUFACTURED GROWING MEDIA

A. Growing Medium: Vegetated roof assembly manufacturer's lightweight, manufactured soil mixture designed for plants indicated on Drawings.

1. Products: Subject to compliance with requirements, provide the following:

a. Carlisle Engineered Growth Medis.

2. General Condition at Time of Planting: Free of stones 1/2 inch (13 mm) or larger in any dimension; free of roots, plants, sod, clods, clay lumps, pockets of coarse sand, paint, paint washout, concrete slurry, concrete layers or chunks, cement, plaster, building debris, oils, gasoline, diesel fuel, paint thinner, turpentine, tar, roofing compound, acid, and other extraneous materials harmful to plant growth; free of weeds and other botanical pests; not infested with nematodes, grubs, or other pests or pest eggs; free of disease-causing plant pathogens and other undesirable organisms; friable and with sufficient structure to give good tilth and aeration.

2.4 WALKWAY PAVERS

A. Heavyweight Concrete Walkway Pavers: Heavyweight, hydraulically pressed, concrete units, with top edges beveled 3/16 inch (5 mm), manufactured for use as roof- or plaza-deck pavers;

with absorption not greater than 5 percent per ASTM C 140; with no breakage and maximum 1 percent mass loss when tested for freeze-thaw resistance according to ASTM C 67.

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

a. Hanover Architectural Products.

b. Roofblok Limited.

c. Sunny Brook Pressed Concrete.

d. Wausau Tile, Inc.; Terra-Paving Division.

e. Westile Roofing Products.

2. Thickness: 2 inches (51 mm).

3. Face Size: As indicated.

4. Color: As selected by Architect from manufacturer's full range.

B. Paver Supports: Paver manufacturer's standard SBR rubber, high-density polyethylene, or polyurethane paver support assembly, including adjustable or stackable pedestals, shims, and spacer tabs for joint spacing of 3/16 inch (5 mm).

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CORE & SHELL – PACKAGE B1

2.5 ACCESSORIES

A. Protection Board: As recommended by membrane roofing manufacturer.

B. Access Boxes: Manufacturer's standard stainless-steel boxes with removable, rigid covers for accessing drains, valves, and switches beneath the finish elevation of growing medium; secure each cover with four noncorrosive screws.

1. Products: Subject to compliance with requirements, available products that may be incorporated into the Work include, but are not limited to, the following:

a. JDR Enterprises, Inc.; Access Box.

b. ZinCo USA, Inc.; Inspection Chamber.

C. Soil Retainer: Assembly manufacturer's formed stainless-steel edging with drainage openings.

1. Configuration: As shown on Drawings.

2. Color: To Match White EPDM Roofing System.

3. Method of Attachment: Manufacturer's standard adhesive compatible with the membrane roofing.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine each area to receive vegetated roof assembly for compliance with requirements for installation tolerances and other conditions affecting performance.

1. Verify that roof insulation over membrane roofing is in place, secure, and flush along all seams.

2. Verify that perimeter and other flashings are in place and secure along entire lengths where they will be covered by vegetated roof assembly.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

C. Inspect growing medium. If growing medium is contaminated by foreign or deleterious material or liquid, remove growing medium and contamination and replace with new growing medium.

3.2 PREPARATION

A. General: Protect structures, utilities, sidewalks, pavements, and other facilities and areas from damage caused by installation.

B. Protection Course: Cover membrane roofing with protection board with butted and fully taped joints before membrane roofing is subject to vegetated roof assembly installation work.

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3.3 INSTALLATION, GENERAL

A. Install vegetated roof assembly according to manufacturer's written instructions.

B. Small Plant Stabilization: Install erosion-control fabric over planting area to secure small plants according to manufacturer's written instructions.

C. Access Boxes: Install access box at each drain, valve, and switch beneath the finish elevation of growing medium.

3.4 PLANTING

A. Verify that no foreign or deleterious material or liquid such as paint, paint washout, concrete slurry, concrete layers or chunks, cement, plaster, oils, gasoline, diesel fuel, paint thinner, turpentine, tar, roofing compound, or acid has been deposited in growing medium within a planting area.

B. Do not mix or place growing medium during frozen, wet, or muddy conditions.

C. Suspend spreading, grading, and planting operations during periods of excessive moisture until the moisture content in growing medium reaches acceptable levels to attain the required results.

D. Uniformly moisten an excessively dry growing medium that is too dusty or not workable.

E. Preplanted Vegetative Mat: Install in full contact with growing medium and secure in position.

3.5 WALKWAY-PAVER INSTALLATION

A. General: Install walkway pavers in locations and of widths shown on Drawings and according to manufacturer's written instructions.

B. Accurately install paver supports and accessories in locations and to elevations required. Adjust for final level and slope with shims.

C. Loosely lay walkway pavers on supports, maintaining a uniform open joint width. Tightly seat pavers against spacers to eliminate lateral movement or drift of paving assembly. Align joint patterns parallel in each direction.

1. Lay out pavers to avoid less-than-half-width pavers at perimeter or other terminations.

D. Tolerances:

1. Install pavers to vary not more than 1/16 inch (1.6 mm) in elevation between adjacent pavers and not more than 1/16 inch (1.6 mm) from surface plane elevation of individual paver.

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3.6 SOIL-RETAINER INSTALLATION

A. Install soil retainer where indicated according to manufacturer's written instructions.

3.7 FIELD QUALITY CONTROL

A. Manufacturer's Field Service: Engage Division 07 membrane roofing manufacturer's authorized service representative to provide inspection of vegetated roof assembly installation and prepare inspection reports.

B. Correct deficiencies in work that do not comply with requirements.

3.8 PLANT MAINTENANCE

A. General: During maintenance period, maintain plantings by pruning, cultivating, watering, weeding, fertilizing, mulching, restoring planting saucers, adjusting and repairing devices, resetting plants to proper elevations or vertical position, and performing other operations as required to establish healthy, viable plantings. Spray or treat as required to keep trees and shrubs free of insects and disease.

B. Replace growing medium that becomes displaced or eroded because of settling or other processes.

C. Apply treatments as required to keep plant materials, planted areas, and growing medium free of pests and pathogens or disease. Use integrated past management practices whenever possible to minimize the use of pesticides and reduce hazards. Treatments include physical controls such as hosing off foliage, mechanical controls such as traps, and biological control agents.

D. Use only products and methods acceptable to membrane roofing manufacturer.

3.9 CLEANING AND PROTECTION

A. During planting and maintenance, keep adjacent areas and construction clean and maintain work area in an orderly condition.

B. Protect vegetated roof assemblies from damage due to planting operations and operations of other contractors and trades. Repair or replace damaged vegetated roof assemblies.

END OF SECTION 329500