General Skylight Specifications
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1.1 Submittals

A. Shop Drawings: Indicate material types, gauges and finishes, fabrication details and installation details. Show glazing types, methods of attachment and thermal movement provisions.

B. Product data: Indicate materials, finishes and installation procedures recommended by manufacturer. Indicate compliance with specified design criteria. Include specific glazing details.

C. Structural design calculations: Indicate compliance with specified structural design criteria.

D. Samples: Submit samples of aluminum materials. Samples shall indicate full range of color to be expected in finished work.

E. Test data: Indicate compliance with performance requirements specified herein.

F. Closeout Documents: Submit as fabricated drawings and specified warranty. Include instructions for general maintenance and repair of surfaces and finishes.

1.2 Quality Assurance
A. Manufacturer: Skylight manufacturer shall have a minimum of ten years experience in design, fabrication and installation of custom aluminum skylight systems.

1.3 Delivery, Storage and Handling
A. Deliver and store components in manufacturer’s protective packaging. Store in a dry space, off floor.

B. Handle materials to prevent damage to prefinished surfaces. Install no components which have been damaged or stained.

1.4 Project/Site Conditions
A. Field dimensions: Take field dimensions before preparation of shop drawings and fabrication.

B. Protection: Protect aluminum surfaces from contact with lime, mortar, cement, acids and other harmful surfaces as well as from careless handling, storage or machining.

1.5 Warranties
A. Provide Owner’s ** (5) (10) ** year written warranty covering skylight work. Warranty shall cover defective materials, workmanship and performance. Warranty shall be limited to repair or replacement of work described in this section and shall not provide for repair or replacement of work by others. Warranty of finish as specified by applicator. Glass warranty as specified by glass manufacturer.

B. Warranties shall begin on Date of Substantial Completion.


2.1 Metal Framed Skylights

A. Acceptable product: Series ** 350, 500, 700** as manufactured by Gammans Skylight Systems, 10 Beavers Street, Newnan, Georgia 30263. Phone (770-254-1992), Fax (770-251-7094).

B. Aluminum components:
1. Extrusions: Meeting ASTM B221;alloy, temper and wall thickness as required to meet design criteria. Structural characteristics of aluminum shall be in accord with AA, “Specification for Aluminum Structures.”

2. Sheet: 5005-H34 alloy meeting ASTM B209; minimum 0.040” thickness.

C. Finish:
1. Aluminum components and components to which exterior sealant is applied:
a. **Two-coat, three coat**, shop-applied, 70% resin, baked-on fluoropolymer coating system based on Atofina, Kynar 500 or Ausimont U.S.A., Inc. Hylar 5000 resin.

b. Color: **Standard, Custom** color as selected by Architect.

2. Unexposed aluminum components: mill finish.

D. Glazing material and accessories: Heat strengthening and thickness as required to meet loading conditions.
1. Standard Certification Requirements:
a. Heat treated glass: ASTM C1048, with surface stress of 5,000 +/- 1500 psi.

b. Laminated glass: Two lites interleaved with polyvinyl butyral (PVB). Provide PVB layer of minimum 0.030-in.

c. Insulating glass: CBA rated by IGCC when tested in accordance with ASTM E773 and ASTM E774. Dual edge seals shall have secondary silicone seal. Exterior lite shall be (heat strengthened) (fully tempered) glass and interior lite shall be laminated glass.

2. Glazing Unit Composition:
a. Inboard lite: **Clear**color,
laminated float glass, formed from two sheets of heat-strengthened glass laminated with PVB layer;
**_______ “thickness.**

b. Outboard lite:_________________ heat-strengthened glass; ** ________thickness.**


2. Glazing Unit Composition:
a. Laminated unit composed of two lites **__** thick with **.030, .060** interlayer.

3. Spacer of insulated units: Manufacturer’s standard steel or aluminum spacer welded, soldered, fused, bent or butyl-injected corners and welded, soldered, fused or butyl-injected splices and joints, filled with desiccant; to provide a ½” thickness, hermetically sealed, dehydrated air space. Primary seal shall be polyisobutylene and secondary seal shall be two-part silicone.

E. Glazing gaskets: Glazing assembly manufacturer’s standard extruded or molded neoprene or Ethylene Propylene Diene Monomer (EPDM) gaskets. Glazing tapes as manufactured by Norton, Inc. or equal.

F. Perimeter sealant: As specified in Sealants and Caulking section.

G. Non-skinning sealant: Non-skinning butyl type, meeting AAMA “Joint Sealants” manual.

H. Fasteners and anchors: Corrosion resistant. Exposed fasteners to be stainless steel. Concealed/protected fasteners to be zinc coated. Anchors to be zinc coated.

I. Bituminous coating: Cold-applied, asphalt mastic meeting SSPC-Paint 12, minimum 30 mil thickness.

J. Neoprene pads: Neoprene, 60-70 durometer hardness, meeting ASTM D1056.

A. Factory fabricate skylights to dimensions and specifications called out on approved shop drawings. Aluminum to be used for reinforcment to greatest extent possible. Any steel reinforcement or clipwork shall be finished with a high zinc finish such as a zinc cromate primer.

B. Make riveted joints in sheet metal flashing work using stainless steel solid shank rivets or closed end type pop rivets.

C. Welding shall be by heliarc process in accord with AWS standards, with welds ground smooth prior to finishing.

D. Weep curbs to exterior. Provide weeps at each rafter intersection, minimum, for infiltration and condensation. Weep holes shall be baffled to prevent noise or whistling from wind.



A. Manufacturer of skylight system or skylight manufacturer’s approved installer shall install skylight system.

A. Inserts and anchorage: Furnish inserts and anchoring devices which must be preset in concrete on timely basis to avoid delay in the work. Furnish location drawings for use in installation of inserts and anchorages.

B. Coordinate setting drawings, diagrams, templates and instructions for installation of concrete inserts, anchor bolts and miscellaneous items having integral anchors cast in concrete construction.

A. Verify location and alignment of preset anchors. Report deviations and proposed method for correction to Architect prior to proceeding.

B. Fastening to in-place construction: Provide anchorage devices and fasteners for securing skylights to in place construction, including threaded fasteners for concrete inserts, anchor bolts and erection bolts of types and sizes indicated on approved shop drawings.

C. Cutting, fitting and placement: Perform cutting, drilling and fitting for installation of work. Set work in location, alignment and elevation, plumb and level, true and free of rack; measured from established lines and levels. Install work in accord with approved shop drawings.

D. Protect aluminum from contact with dissimilar materials by separating with neoprene pads or bituminous coating.

E. Before securing skylight components in final position to structure, shim and brace work plumb and level and in designated location.

F. Field connections: Provide welded or bolted connections as indicated on approved shop drawings. Join dissimilar metal by bolting with galvanic separators. Welding shall be performed by qualified welders.

G. Welded connections: Conduct in accord with AWS standards for type of metal being welded. Clean surfaces to be welded as specified in shop cleaning. Do not weld finished, exposed members. Do not perform welding at locations where discoloration or other damage would result on exposed surfaces.

H. Bolted connections: Provide for alignment of skylight members with substrate.

I. Caulk metal-to-metal internal skylight joints using non-skinning type sealant. Install in accord with Joint Sealants section.

J. Caulk perimeter of skylights and exposed fastener heads using exterior sealant as specified in Joint Sealants section. Do not seal weepholes.

K. Glaze units in accord with approved shop drawings and manufacturer’s product data for weathertight installation.

L. Flashings: Make weathertight fit, allowing for expansion and contraction. Provide 6” wide backup plate at joints, formed to profile of flashing. Set flashing over backup plate in double beads of non-skinning sealant. Form joints in flashings to allow for ½” minimum expansion maximum, and 8’-0”from corners.

M. Cleaning: Maintain skylight assemblies, including glazing, in reasonably clean condition during construction period. Immediately remove stains or materials having adverse effect on materials and finishes. Remove excess glazing sealants.

N. Allowable erection tolerances:
1. Maximum variation from designated position: 1/8” in 10’-0”, not exceeding ¼” in 40’- 0” any direction.

2. Maximum offset in alignment between two consecutive members in line, end to end:1/16”.

3. Maximum offset between framing members at corners of glazing pocket:1/32”.

A. Field tests: Conduct field testing of completed skylight assemblies to determine watertightness. Conduct testing in accord with AAMA 501.2 A minimum of (one test) (two tests) per skylight shall be performed. Correct deficiencies found in skylights to make assembly watertight. Conduct testing in presence of Architect.

A. Final cleaning: Just prior to Date of Substantial Completion, clean entire skylight assemblies, including interior and exterior metal. Flush with clean water. Repair or replace work which cannot be cleaned or which has been damaged during construction operations.

A. Protect skylight system during remainder of work from damage caused by work of other trades.

NEWNAN, GA. 30263
770-251-7094 (FAX)

Gammans Skylight Systems ©2020              770-254-1992              10 Beavers St, Newnan GA              
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