NOTE ** Naturalite BMS 3000 skylights, for flat glass, plastic glazing or metal panel infill.
NOTE **
NOTE ** This section is based on products manufactured by Naturalite Skylight Systems, Butler Manufacturing Company, which is located at:
NOTE ** 803 Airport Road
NOTE ** P.O.Box 629
NOTE ** Terrell, TX 75160
NOTE ** Tel: (800) 259-7941
NOTE ** Fax: (972) 551-6129
NOTE **
NOTE ** Naturalite provides complete design, engineering, fabrication, finishing, and installation services for skylights of any size or complexity.
NOTE **
NOTE ** SECTION 08630 - METAL-FRAMED SKYLIGHTS, The Architect's Catalog, Inc.
PART 1 GENERAL
1.1 SECTION INCLUDES
NOTE ** Delete any products or work not required for this project.
A. Removal and disposal of existing skylight, to make way for new skylight.
B. Metal-framed skylights and their glazing.
C. Motor-operators for skylights.
1.2 RELATED SECTIONS
NOTE ** Delete any sections below not relevant to this project; add others as required.
A. Section 05120 - Structural Steel: Structural supports for skylights.
B. Section 05162 - Space Frames: Structural supports for skylights.
C. Section 07620 - Sheet Metal Flashing and Trim.
D. Section 08900 - Glazed Curtain Walls.
E. Section 12500 - Window Treatment: Anchors and brackets for window treatments attached to skylights.
1.3 REFERENCES
NOTE ** Delete references from the list below that are not actually required by the text of the edited section.
A. AA - Aluminum Design Manual; The Aluminum Association.
B. AAMA 501.1 - Standard Test Method for Metal Curtain Walls for Water Penetration Using Dynamic Pressure; part of AAMA 501; American Architectural Manufacturers Association.
C. AAMA 603.8 - Voluntary Performance Requirements and Test Procedures for Pigmented Organic Coatings on Extruded Aluminum; American Architectural Manufacturers Association.
D. AAMA 605.2 - Specification for High Performance Organic Coatings on Architectural Extrusions and Panels; American Architectural Manufacturers Association.
E. AAMA 606.1 - Voluntary Guide Specifications and Inspection Methods for Integral Color Anodic Finishes for Architectural Aluminum; American Architectural Manufacturers Association.
F. AAMA 607.1 - Voluntary Guide Specification and Inspection Methods for Clear Anodic Finishes for Architectural Aluminum; American Architectural Manufacturers Association.
G. AAMA GDSG-1 - Glass Design for Sloped Glazing; American Architectural Manufacturers Association.
H. AAMA SDGS-1 - Structural Design Guidelines for Aluminum Framed Skylights; American Architectural Manufacturers Association.
I. AAMA TSGG-90 - Two-Sided Structural Glazing Guidelines for Aluminum Framed Skylights; American Architectural Manufacturers Association.
J. ASTM C 509 - Standard Specification for Elastomeric Cellular Preformed Gasket and Sealing Material.
K. ASTM C 794 - Standard Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants.
L. ASTM C 864 - Standard Specification for Dense Elastomeric Compression Seal Gaskets, Setting Blocks and Spacers.
M. ASTM C 1036 - Standard Specification for Flat Glass.
N. ASTM C 1048 - Standard Specification for Heat-Treated Flat Glass--Kind HS, Kind FT Coated and Uncoated Glass.
O. ASTM D 1149 - Standard Test Method for Rubber Deterioration--Surface Ozone Cracking in a Chamber.
P. ASTM E 283 - Standard Test Method for Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls and Doors Under Specified Pressure Differences Across the Specimen.
Q. ASTM E 331 - Standard Test Method for Water Penetration of Exterior Windows, Curtain Walls and Doors by Uniform Static Air Pressure Difference.
R. ASTM E 773 - Standard Test Methods for Seal Durability of Sealed Insulating Glass Units.
S. ASTM E 774 - Standard Specification for Sealed Insulating Glass Units.
T. FGMA Glazing Manual; Glass Association of North America.
U. IGCC Certified Products Directory; Insulating Glass Certification Council.
1.4 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Product Data: Manufacturer's descriptive literature, specifications, and installation instructions.
C. Test Reports: Show compliance with specified performance requirements.
D. Shop Drawings: Prepare specifically for this project. Include:
1. Detailed plans and elevations, details of framing members, glazing materials, sealants, fasteners, anchors.
2. Types and thicknesses of formed flashing and closures.
3. Interface with adjacent construction.
4. Horizontal and vertical forces at rafters.
NOTE ** Delete the following paragraph if colors are completely specified or indicated on the drawings.
E. Selection Samples: Two sets of color charts or samples, for selection of colors of finishes, glazing, and sealants.
F. Glazing Samples: Two pieces, 12 inches (300 mm) square, of glazing in specified color, pattern, and coating, for verification.
G. Metal Finish Samples: Two pieces of aluminum with specified finish and color, for verification.
NOTE ** Delete the following paragraph if no structural silicone sealant is required.
H. Certification for Structural Sealant: Written documentation from sealant manufacturer:
1. Statement that the sealant selected has been tested for adhesion and compatibility on representative samples of metal, glass and other glazing components.
2. Statement that the sealant joint design and application procedures shown on the shop drawings are suitable for this project.
3. List of recommended cleaning methods and priming recommendations.
4. Results of adhesion tests for sealants proposed for use on the project.
1.5 QUALITY ASSURANCE
A. Manufacturer Qualifications: Minimum of 10 years experience in the fabrication and installation of similar products.
NOTE ** The skylight manufacturer should install complex, monumental, and four-sided structurally-glazed skylights. That way, although the manufacturer may elect to subcontract the installation work, the ultimate responsibility for the entire skylight and the warranty remain the manufacturer's. Edit the following paragraph if other not required.
B. Installer Qualifications: The manufacturer of the skylight or his authorized representative.
C. Pre-Installation Meeting: Convene just prior to start of site operations.
1. Require attendance of installer and installation personnel.
2. Cover procedures required to maintain proper working conditions, to coordinate with other work, and to protect roofing and flashings as required by roofing manufacturer.
1.6 DELIVERY, STORAGE, AND HANDLING
A. Arrange deliveries to avoid delays but to minimize on-site storage.
B. Deliver products in labelled protective packages.
C. Deliver, handle, and store in strict compliance with manufacturer's instructions and recommendations.
1.7 WARRANTY
A. Skylight Warranty: Provide written warranty signed by manufacturer that products are free of defects in material and workmanship. Include repair or replacement of work for five years from date of completion. Defects are defined to include uncontrolled leakage of water and abnormal aging or deterioration.
NOTE ** Delete the following paragraph if fluoropolymer finish is not specified. Anodized and baked enamel finishes are normally covered by the standard one-year warranty, but additional coverage may be available pending manufacturer review of geographic location and at additional cost.
B. Fluoropolymer Finish Warranty: Provide written warranty signed by manufacturer and finisher that finish is free of defects in material and workmanship. Include repair or replacement of work which exhibits defects for five years from date of completion. Defects are defined to include peeling, chipping, chalking, fading, abnormal aging or deterioration, and failure to perform as required.
C. Glazing Warranty: Provide written warranty signed by manufacturer that glazing is free of defects in material and workmanship. Include repair or replacement of work which exhibits defects for five years from date of manufacture. Defects are defined to include delamination, seal failure, and deterioration of film coatings.
1.8 EXTRA MATERIALS
NOTE ** Delete the following paragraph if not required. Extra material ("attic stock") is intended as a small quantity on hand for the most common sizes and shapes of glass used on the project. This is especially useful for special tints or coatings because there may be very long lead times (14 to 16 weeks) to manufacture these special items. Non-typical or odd-size units are not usually included, since the cost is high compared to the likelihood they will be needed.
NOTE **
NOTE ** Some owners, such as government agencies, may not be able to include extra materials in the construction budget.
A. Extra Materials: If 50 or more glazing units of the exact same size are required, provide 1 percent, or a minimum of 1 unit, for Owner's use; pack in sturdy containers, label, and store in the area designated by the Owner.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Provide products made by Naturalite Skylight Systems, Butler Manufacturing Company, P.O.Box 629, 750 Airport Road, Terrell, TX 75160. ASD. Tel: (800) 527-4018. Fax: (972) 551-6420.
NOTE ** Delete one of the two following paragraphs; coordinate with Division 1 requirements. If other manufacturers must be listed, Super Sky Products Inc. and Fisher Skylights may manufacture products of equivalent performance.
B. Requests for substitution will be considered in accordance with provisions of Section 01600.
C. Substitutions: Not permitted.
D. For manufacturers not listed, submit evidence of ability to provide products that meet both performance and product requirements, including list of projects of similar design and complexity completed within the last 5 years.
E. Provide primary materials that are made by a single manufacturer.
2.2 METAL-FRAMED SKYLIGHTS
A. Metal-Framed Skylights - Performance Requirements:
NOTE ** Delete the following paragraph if not required. This paragraph requires that the skylight be of a configuration, or be stiff enough, to exert only vertical forces -- considerably more expensive than otherwise. If this "non-thrusting" design is required, contact Naturalite early in the design phase -- some configurations can be designed to be "non-thrusting", others cannot.
1. Design framing system to exert no horizontal forces on supporting structure.
2. Design to withstand the following:
NOTE ** Loads must be determined for each project, based on local code, location, and building configuration. Refer also to AAMA Structural Design Guidelines for Aluminum Framed Skylights for information on design loadings and deflection considerations.
a. Snow load: ___ psf (___ kPa) snow load.
b. Wind load: ___ psf (___ kPa) positive and ___ psf (___ kPa) negative.
c. Dead loads.
d. Concentrated live load: 250 pounds (113 kg) applied to any framing member at a location that will produce the most severe stress or deflection.
NOTE ** Delete one of the following two paragraphs. The first is for use if the skylight is part of a heated enclosure; the second is for an unheated enclosure.
e. Temperature range: 70 degrees F (39 degrees C) above and below ambient temperature.
f. Temperature range: 50 degrees F (28 degrees C) above and below ambient temperature.
NOTE ** Be sure to check state and local building codes for allowable frame deflections. Some codes include skylight framing members under the requirements for roof structural members, which might require less deflection.
3. Deflection of Any Glazing Support Member Under Load: Not more than 1/180 of the unsupported span.
4. Air Infiltration: Not more than 0.06 cfm per sq ft (1.1 cu m/h per sq m) of glazed surface area, when tested in accordance with ASTM E 283 at a static pressure differential of 6.24 psf (3.0 kPa).
5. Water Penetration: No uncontrolled water leakage, when tested in accordance with ASTM E 331 at a static pressure differential of 12 psf (5.7 kPa).
6. Water Penetration: No uncontrolled water leakage, when tested in accordance with AAMA 501.1 at a static pressure differential of 12 psf (5.7 kPa).
B. Metal-Framed Skylights: Naturalite BMS 3000 system; aluminum framing system with glazing, manufacturer-engineered and factory-fabricated, complete with all glazing accessories, flashings, connections, and anchors.
NOTE ** Delete all but one of the following three paragraphs.
1. Glazing Method: Cap glazing.
2. Glazing Method: Two sides structural silicone glazing; other two sides cap glazing.
3. Glazing Method: Four sides structural silicone glazing.
NOTE ** Delete the following if not required. Be sure that the drawings clearly indicated which steel members are to be engineered and furnished by the skylight manufacturer (and not by the structural steel fabricator).
4. Include steel structural members indicated on drawings as part of the skylight system.
5. Fabricate to actual dimensions of constructed work where possible; otherwise, allow for field adjustment using trim or flashing of adjustable size or configuration.
6. Fabricate work straight, plumb, level and square, of sizes, shapes, and profiles indicated on approved shop drawings, with uniform, tight joints.
NOTE ** Delete all but one of the following three paragraphs. Naturalite recommends fluoropolymer coating for exterior surfaces due to its excellent weathering and chemical resistance. Fluoropolymer is more expensive than anodizing and some colors cost more than others -- if color is not specified, bidders usually include only "non-exotic" colors.
NOTE ** If clear anodizing is specified delete all of the following six paragraphs. Otherwise, select one and delete the others. It is highly recommended that colors be specified or indicated on the drawings -- color required affects the cost of all these finishes. Non-standard or "exotic" colors significantly affect the cost of coated finishes. Refer to manufacturer's catalog data for colors available.
21. Color: Medium bronze.
22. Color: Dark bronze.
23. Color: Black.
24. Color: As selected from manufacturer's standard colors.
25. Color: Custom color to match Architect's sample.
26. Color: _______.
C. Framing Members: Extruded aluminum, 6063-T5, 6063-T6, or 6061-T6 alloy and temper, as recommended by the manufacturer for design loading, cross-sectional configuration, fabrication requirements and finish required.
NOTE ** Delete one of the following two paragraphs. Tubular framing is the most common because it is most efficient structurally and it allows for concealed condensation gutters, keeping the members free of drips and streaking. I-beam and "skin-type" framing (used with separate structure) are also available.
1. Provide tubular rafter and purlin framing members.
2. Provide _______-shaped rafter and purlin framing members.
3. Design to collect and channel condensation and water infiltration to the exterior through weep holes or drain tubes in the sill or perimeter framing members.
4. Design condensation gutters so they are concealed and flush with framing.
5. Reinforce butt, mitered, and splice joints with internal aluminum splice plates where possible; mechanically fastened with stainless steel truss head fasteners in accordance with manufacturer's standard connection details.
6. Include a positive stop to control compression in the glazing rabbet.
NOTE ** Delete any of the following glazing methods that are not required.
7. Cap Glazing: Glazing caps mechanically secured with thermally broken glazing clips at purlins and sills; sealed at corner intersections.
NOTE ** Delete the following paragraph if not required.
8. Cap Glazing: Provide a full perimeter exterior wet seal.
9. Two-Sided Structural Silicone Glazing: Two sides of glazing retained with glazing caps mechanically secured with thermally insulated glazing clips; two remaining sides secured to continuous aluminum fin using structural silicone glazing sealant in shear-type joint design; comply with AAMA Two-Sided Structural Glazing Guidelines for Aluminum Framed Skylights.
10. Four-Sided Structural Silicone Glazing: Factory glazed using perimeter frame secured to the inside surface of the glazing using structural silicone glazing sealant; mechanically fastened to the support framing system with retainer clips spaced as required to support design loads; design to allow for exterior glazing replacement without disrupting adjacent glazing.
11. Do not anchor sill members through integral secondary gutter area on pitches less than 4 in 12 (1:3) from horizontal.
12. Welding: Factory-performed heliarc welding with all exposed welds finished to match adjacent material.
D. Formed Flashing and Closures: Aluminum sheet.
1. Anodized: Minimum 0.040 inch (1.0 mm) thick.
2. Coated Finish: Minimum 0.062 inch (1.6 mm) thick.
E. Anchors and Fasteners:
1. Not Exposed to Weather: Cadmium plated lag, sleeve and stud bolt anchors.
2. Exposed to Weather: Stainless steel, 300 series.
3. Where bolted connections penetrate secondary gutter of sill member: Same as if exposed to weather.
F. Finishes:
NOTE ** Delete one of the following two paragraphs if clear anodizing is specified. The first paragraph is the best quality clear anodizing available and should be used on the exterior, while Class II is suitable for interior applications.
1. Clear Anodizing: Class I, AA-M10C22A41 clear anodized coating complying with AAMA 607.1, 0.7 mils (0.018 mm) or thicker.
2. Clear Anodizing: Class II AA-M10C22A31 clear anodized coating complying with AAMA 607.1, 0.4 to 0.7 mils (0.010 to 0.018 mm) thick.
3. Color Anodizing: Class I, AA-M10C22A44 anodized coating electrolytically deposited complying with AAMA 606.1, 0.7 mils (0.018 mm) or thicker.
4. Baked Enamel Coating: Polyester, complying with AAMA 603.8.
NOTE ** Delete all but one of the following two paragraphs if fluoropolymer finish is required. For dark or bright colors or metallic finish, consult with finish manufacturer and specify actual color or finish selected -- cost will vary.
5. Fluoropolymer Coating: Two coats 70 percent Kynar 500/Hylar 5000 resin base fluoropolymer finish complying with AAMA 605.2.
6. Fluoropolymer Coating: Three coats 70 percent Kynar 500/Hylar 5000 resin base fluoropolymer finish complying with AAMA 605.2.
7. Fluoropolymer Coating: Four coats 70 percent Kynar 500/Hylar 5000 resin base fluoropolymer finish complying with AAMA 605.2.
2.3 GLAZING AND INFILL MATERIALS
NOTE ** The following are examples of ways to specify glazing. Consult with glazing manufacturers. Refer to AAMA Glass Design for Sloped Glazing for design considerations. Naturalite can provide assistance in selection of low-e and other coatings for skylight applications. Most sloped glazing and skylight applications require that the plies of either monolithic or insulating units be heat-strengthened. Do not use annealed laminated glass with low-e or reflective coatings regardless of which surface the coating is applied to.
A. Glazing: Glass as specified in Section 08800.
B. Glazing: Single; 1/2 inch (13 mm) laminated glass:
1. Outboard Ply: 1/4 inch (6 mm) clear heat-strengthened glass.
NOTE ** Delete one of the following two paragraphs.
4. Inboard Ply: 1/4 inch (6 mm) clear heat-strengthened glass.
C. Glazing: Sealed insulating units:
1. Exterior Lite: 1/4 inch (6 mm) clear heat-strengthened glass.
2. Air space: 1/2 inch (12 mm).
3. Interior lite: Laminated glass:
NOTE ** Delete all but one of the following three paragraphs. 1/8 inch plies result in a 1 inch thick unit. 3/16 inch plies result in a 1-/8 inch thick unit. 1/4 inch plies result in a 1-1/4 inch thick unit.
a. 2 plies of 1/8 inch (3 mm) clear glass.
b. 2 plies of 3/16 inch (5 mm) clear glass.
c. 2 plies of 1/4 inch (6 mm) clear glass.
d. Heat-strengthened.
NOTE ** Delete one of the following two paragraphs.
e. Interlayer: 0.030 inch (0.8 mm) clear polyvinyl butyral (PVB) sheet.
f. Interlayer: 0.060 inch (1.5 mm) clear polyvinyl butyral (PVB) sheet.
D. Glazing: Plastic glazing sheet:
NOTE ** Delete one of the following two paragraphs.
1. Single glazed.
2. Double glazed.
NOTE ** Delete one of the following two paragraphs.
5. Thickness: As determined by skylight manufacturer.
6. Color: Selected by Architect from skylight manufacturer's standard selection.
7. Color: ________.
NOTE ** The following glazing is for vertical applications that may be associated with the skylight, such as end walls, entrances, and vestibules. Doors and sidelights usually must be safety glazing. Delete any of the following paragraphs on vertical glazing that are not required.
E. Glazing for Vertical Framing: Same as for skylight.
F. Glazing for Vertical Framing: Single glazing.
1. 1/4 inch (6 mm) thick clear glass.
NOTE ** Delete one of the following two paragraphs.
NOTE **
2. Heat-strengthened.
3. Fully tempered.
G. Glazing for Vertical Framing: Sealed insulating units:
NOTE ** Delete one of the following two paragraphs.
1. Exterior Lite: 1/4 inch (6 mm) clear heat-strengthened glass.
2. Exterior Lite: 1/4 inch (6 mm) clear fully-tempered glass.
3. Air space: 1/2 inch (12 mm).
NOTE ** Delete one of the following two paragraphs.
4. Interior Lite: 1/4 inch (6 mm) clear heat-strengthened glass.
5. Interior Lite: 1/4 inch (6 mm) clear fully-tempered glass.
NOTE ** Metal panels integral with skylight system should be specified in this section. Do not exceed 60 inches in either length or width, due to availability of coated sheet. Fluoropolymer coating finish is the most common.
H. Insulated Panels: Flat, metal faced panels with insulating core.
1. Face Sheets: Prefinished 0.040 inch (1.0 mm) thick aluminum, alloy 5005-H34.
2. Core: Polyisocyanurate structural foam core with R-value of 5.9 per inch (1.04 W/(m K)/M) thickness.
3. Thickness: Same as adjacent glazing unit.
4. Finish: Same as for framing.
NOTE ** Delete one of the following two paragraphs.
5. Color: Same as for framing.
6. Colors: Different from framing and different colors are required for interior and exterior faces.
NOTE ** Delete the following paragraph if panels are not installed in 2-sided structural silicone sealant application.
7. Two-Sided Structural Silicone Glazing Applications: Purlin edges with panned edges or 1/2 inch (12 mm) returns as indicated on the Drawings.
I. Glass: Conform to applicable requirements of ASTM C 1036 and ASTM C 1048.
1. Determine glass strengths using AAMA Glass Design for Sloped Glazing guidelines.
2. Glaze in accordance with FGMA Glazing Manual and glass fabricator's guidelines.
NOTE ** Delete the following two paragraphs if sealed insulating units are not used.
3. Sealed Insulating Units: Dual sealed with primary seal of polyisobutylene and secondary seal of two-part silicone equal to Dow Corning 982 or GE Silicone 4200.
4. Sealed Insulating Units: Class A rated when tested in accordance with ASTM E 773 and ASTM E 774; IGCC certified.
J. Gaskets: Provide continuous cushion below and continuous spacer above glazing.
1. Ozone Resistance: Withstand one part per million ozone for 500 hours at 20 percent elongation at 100 degrees F (38 degrees C) when tested in accordance with ASTM D 1149.
NOTE ** Delete one of the following two paragraphs. Silicone rubber gaskets are an additional cost.
2. Gaskets Below Glazing: Extruded, dense EPDM black rubber, Shore A durometer of 60 plus or minus 5, complying with ASTM C 864.
3. Gaskets Below Glazing: Extruded, silicone rubber, Shore A hardness of 40 plus/minus 5 when tested in accordance with ASTM C 1115.
4. Gaskets Above Glazing: Extruded, closed-cell, sponge EPDM black rubber, complying with ASTM C 509.
K. Sealants: As required by skylight manufacturer.
1. Adhesion: Show adequate adhesion to samples of metal and glass, when tested in accordance with ASTM C 794.
2. Exterior Metal-to-Glass Corner and Cap Seals: Black.
3. Exposed Metal-to-Metal Joints: Any standard color silicone sealant.
NOTE ** Delete the following paragraph if neither 2-sided nor 4-sided structural silicone glazing is used.
L. Structural Silicone Glazing Sealant: Type as required by skylight manufacturer; compatible with all contact components.
1. Insulating Glass Applications: Limit depth of silicone joint to design thickness of exterior lite; use temporary clips to secure purlin edge of unit in place until sealant has fully cured.
2. Comply with AAMA Two-Sided Structural Glazing Guidelines for Aluminum Framed Skylights for design and field procedures.
2.4 ACCESSORIES
NOTE ** Delete the following paragraph if not required. Motor-operated skylight applications require a feasibility study by Naturalite early in the design phase.
A. Operable Skylights: Include all components required to make skylight operable, including steel track, support brackets, mechanical drive system, electric motors, limit switches, control panel, key operated switches and accessories.
PART 3 EXECUTION
3.1 EXAMINATION
NOTE ** DRAWING COORDINATION: The drawings should indicate the locations, types, and dimensions of the skylight units, and show details of interface with adjacent construction.
A. Take field measurements to verify that fabricated work will fit spaces intended.
B. Verify that areas in which work is to be installed are ready for installation and that supports are installed correctly.
C. Do not proceed until unsatisfactory conditions have been corrected.
3.2 PREPARATION
NOTE ** Delete the following paragraph if no demolition is required.
A. Remove existing skylight and other components and prepare for new construction. Do not overload adjacent construction. Remove debris from site and dispose of legally.
3.3 INSTALLATION
A. Install in strict accordance with manufacturer's instructions and recommendations and with approved shop drawings; provide a complete weatherproof assembly.
B. Anchor securely to supporting structure, but allow for differential and thermal movement.
NOTE ** Delete the following paragraph if neither 2-sided nor 4-sided structural silicone glazing is used.
C. Do not perform structural silicone sealant work when the metal temperature is below 32 degrees F (0 degrees C).
D. Separate aluminum members from dissimilar metals with protective coating or sheet capable of preventing electrolytic action.
E. Ensure that weep and condensation control measures function properly.
F. Field-Applied Sealants: Clean and prime surfaces as required to assure proper adhesion; apply in accordance with sealant manufacturer's guidelines and joint dimensions shown on approved shop drawings.
G. Coordinate with other work.
3.4 CLEANING AND REPAIR
A. Remove labels, part number markings, sealant smears, handprints, and construction dirt; protect installed work from damage.
B. Clean all exposed surfaces immediately prior to final inspection, using non-abrasive materials and methods recommended by manufacturer.
C. Repair damaged components and finishes in accordance with manufacturer's recommendations; replace work that cannot be repaired to the satisfaction of the Architect.
