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Flashings Fasteners & Accessories

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  • 1. Flashings, Fasteners & Accessories
  • 2. Flashing Designs
      • Also Referred to as Trims
      • Press/Folder Broke
      • Strippable Film Applied
      • Made Per Order in Shop
      • Standard Shape, Custom Sizes
      • 10’-0” Standard or up to 20’-0”
      • Architectural “Box” Flashings
      • Commercial Sculptured
    Architectural / Residential / Commercial
  • 3. Press/Folder Broke Flashings
  • 4. Arch. / Res. Flashings
  • 5. Architectural Eave/Drip Edge Note: Panel field hemmed.
  • 6. Architectural/Residential Gutter Note: Post-hung gutter system.
  • 7. Architectural Valley Note: Water diverter should equal panel rib height.
  • 8. Architectural Rake/Gable Note: Rake/Gable flashings should be installed working from bottom to top of roof.
  • 9. Architectural Rake/Sidewall
  • 10. Architectural Ridge/Hip
  • 11. Vented Ridge
  • 12. Sculptured Commercial Flashings
  • 13. Commercial Gutters Sculptured Post-Hung Gutter System Box Pre-Hung Gutter System
  • 14. Flashing Packaging Shrink Wrapped Wood Crate
  • 15. Four questions to help determine the proper fastener: 1. What materials are being fastened? 2. What are the load requirements? 3. What are the service requirements? 4. What is the environment? Fasteners/Screws
  • 16.
    • List each type of material (steel, wood, rigid insulation).
    • List the thickness of each material. (Determines attachment thickness)
    #1 What materials are being fastened ? Steel Purlin Wood Decking Steel Decking
  • 17. Allow at least 3 threads to extend beyond all materials. (Screw will be at least 1/2” – 1” longer than attachment length.) Attachment thickness + ½” # 1 What materials are being fastened?
  • 18.
    • Uplift load Relates to the pullout / tensile / pullover strength of the screw – washer.
    • Shear load Relates to the shear strength / ductility of the screw.
    Bending #2 What are the load requi rements? Shear Shear Tensile Pullover
  • 19.
    • Is there...
    • Vibration?
    • Expansion & Contraction?
    • Prying on the Joint?
    Identify conditions that can affect the screws performance. #3 What are the service requirements?
  • 20.
    • Determine...
    • Corrosion potential
    • Dissimilar metals
    #4 What is the environment?
  • 21. 1. CONCEALED FASTENER CONDITIONS Fastener/Screw Applications
  • 22. 2. EXPOSED FASTENER CONDITIONS Fastener/Screw Applications
  • 23.
    • To eliminate confusion and assure the proper fastener is used, specifications for tapping screws should be written to include:
    • Thread diameter
    • Threads per inch
    • Screw Length
    • Point Type
    • Type of screw
    • Drive size
    • Head style
    • Fastener material
    • Finish / plating / corrosion resistance (salt spray)
    Fastener/Screw Terminology
  • 24. Description : #12-14 x 1-1/4” DP2 Self-Drilling Screw. 5/16” Hex Washer Head. Undercut with EPDM Sealing Washer. Carbon Steel. Zinc Plated with 1,000hrs salt spray coating. Fastener/Screw Terminology Head Style Major Diameter Threads Per Inch Fastener Length Point Type #12 - 14 x 1-1/4” DP2 5/16” HWH Major Diameter Threads Per Inch Fastener Length Point Type Head Style
  • 25.
    • 2. “Fine” Thread
    • Use in thick metal
    • Slower to install.
    • Provides more thread engagement.
    • 1. “Coarse” Thread
    • Use in thin metal and wood.
    • “ Steep” thread installs faster.
    • “ Steep” thread loosens more quickly.
    Fastener Thread Types TWO GENERAL TYPES OF THREADS
  • 26. Hex Head Pan Flat Wafer Hex Washer Flat Cuntersunk Head and drive systems for a variety of conditions Pancake Fastener/Screw Head Styles
  • 27. Point Type Drilling Thickness DP1 Thin (.018” - .090”) DP2 Thin Medium (.035” - .140”) DP3 Medium (.090” - .250”) DP4 Medium/Heavy (.145” - .375”) DP5 Heavy (.250” - .500”) A - DP1 Light Gauge (Thin Metal) B - DP5 Heavy Gauge The thicker the material to be fastened, the larger the point “Type”. Self Driller Point Types B A
  • 28. Stainless Steel Cap
    • Zinc and Aluminum alloy is compatible with sheet coatings.
    • Uncoated zinc head will oxidize and turn black in color.
    • Uncoated head will not turn black in color.
    • May react with Galvalume in severe coastal conditions.
    Zinc Cap / Cast Head Fasteners with 20 Year Warranties
  • 29. Flange Seal Head Sealant Materials EPDM: Standard (Non conductive) Neoprene: Petrochemical
    • Optimal sealing performance when installed at an angle.
    • Provides greater pullover strength.
    • Nicer installed appearance.
    • Paint damage minimal.
    • More back-out resistance
    Bonded Washers Fastener/Screw Washer Types
  • 30.
    • Fastener Materials and Strength
    • Carbon Steel (C1018-C1022) case hardened
    • 410 stainless steel bright case hardened
    • Modified 304 stainless steel - Cold worked
    • 316 stainless steel - Cold worked
    Fastener/Screw Materials PSI (000) Material Strength
  • 31.
    • Material and Finish
    • 18-8 Stainless Steel (302, 304, 305, 316) - Passivated
    • 410 Stainless Steel – Passivated and Plated
    • 410 Stainless Steel – Passivated
    • Carbon Steel – Long-life Coated
    • Carbon Steel - Zinc Plated
    Increased Corrosion Resistance Fastener/Screw Corrosion Long Life Coated Stainless Steel Zinc Plated
  • 32. 1/8” Pop Rivet Pop rivets are used to hold two pieces of sheet metal together, common at flashing laps, using a 2-Step method; Step #1 - 1/8” Hole is Drilled Through both Pieces. Step #2 - Insert Pop Rivet in Hole with Rivet Gun
  • 33. Standing Seam Panel Clips
    • 1. Floating Clip:
    • Independent base and tab.
    • Used with panel lengths greater than 30’-0”.
    TWO GENERAL TYPES OF CONCEALED CLIPS
    • 2. Fixed Clip:
    • One solid piece.
    • Used with panel lengths less than 30’-0” or snap down panels .
    Note: Base of floating clip should be centered when installed.
  • 34. Thermal Expansion & Contraction Definition: The natural characteristic of a length of metal to expand or contract relevant to a change in the metals temperature. Heat and sun expands/Cooling and shade contracts.
  • 35. Sealants TWO GENERAL FORMS OF SEALANT
    • 1. Tube Sealant
    • Polyurethane based.
    • Average usage per tube of 25’-0”.
  • 36. Sealants
    • 2. Roll/Tape Sealant
    • Double beaded butyl sealant
    • Roll lengths of 40’-0”.
    TWO GENERAL FORMS OF SEALANT
  • 37. Roof Boots/Jacks Note: Silicone boots used on high temp penetrations.

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