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Water Mgmt : Flashing

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Water Mgmt : Flashing

  1. 1. Water Management F L A S H I N G p r e s e n t a t i o n
  2. 2. Presentation Outline <ul><li>Water Management System (WMS) </li></ul><ul><ul><li>Nature of Water </li></ul></ul><ul><ul><li>WMS Components </li></ul></ul><ul><li>Exterior Shell Performance </li></ul><ul><ul><li>Roofing </li></ul></ul><ul><ul><li>Walls </li></ul></ul><ul><li>WMS Focus: Flashing </li></ul><ul><ul><li>Flashing Types </li></ul></ul><ul><ul><li>Roof Flashing </li></ul></ul><ul><ul><li>Wall Flashing </li></ul></ul><ul><li>Conclusions </li></ul>
  3. 3. Water Management SYSTEM <ul><li>Water Issue? </li></ul><ul><ul><li>Knee jerk reaction: Blame the FLASHING </li></ul></ul><ul><li>While researching FLASHING, other WMS components always mentioned: </li></ul><ul><ul><li>Air and Vapor Barriers </li></ul></ul><ul><ul><li>Heat Barrier </li></ul></ul><ul><ul><li>Water Barrier </li></ul></ul>
  4. 4. Water Management SYSTEM <ul><li>WMS Presentations </li></ul><ul><ul><li>Part I: Flashing (PM Workshop) </li></ul></ul><ul><ul><li>Part II: Water Barriers (PM Workshop) </li></ul></ul><ul><ul><li>Part III: Air/Vapor/Heat Barriers (PM Workshop) </li></ul></ul><ul><ul><li>Part IV: WMS Detailing (Studio Workshops) </li></ul></ul><ul><ul><ul><li>Masonry Walls </li></ul></ul></ul><ul><ul><ul><li>Veneer Systems </li></ul></ul></ul><ul><ul><ul><li>Wood Construction </li></ul></ul></ul>
  5. 5. WMS: Nature of Water <ul><li>(3) Physical States of H20 </li></ul><ul><ul><li>Liquid (water) </li></ul></ul><ul><ul><li>Vapor (gas) </li></ul></ul><ul><ul><li>Solid (ice) </li></ul></ul><ul><li>Sources of Moisture </li></ul><ul><ul><li>Liquid/Solid: </li></ul></ul><ul><ul><ul><li>Precipitation (Rain, Sleet, Snow) </li></ul></ul></ul><ul><ul><ul><li>Condensation </li></ul></ul></ul><ul><ul><li>Vapor: </li></ul></ul><ul><ul><ul><li>Artificial Humidification </li></ul></ul></ul><ul><ul><ul><li>Relative Humidity </li></ul></ul></ul>
  6. 6. WMS: Nature of Water <ul><li>Driving Forces for Rainwater Penetrations </li></ul><ul><ul><li>Gravity </li></ul></ul><ul><ul><ul><li>Draw water down thru openings into assembly </li></ul></ul></ul><ul><ul><li>Surface Tension </li></ul></ul><ul><ul><li>Capillary Suction </li></ul></ul><ul><ul><ul><li>Sucks water thru cracks/pores </li></ul></ul></ul><ul><ul><li>Momentum </li></ul></ul><ul><ul><ul><li>Pass thru openings in exterior cladding </li></ul></ul></ul><ul><ul><li>Air Pressure Differential </li></ul></ul><ul><ul><ul><li>Push/pull water thru cracks/pores </li></ul></ul></ul>
  7. 7. WMS: Components <ul><li>Air and Vapor Barriers </li></ul><ul><li>Heat Barrier </li></ul><ul><li>Flashing </li></ul><ul><li>Water Barrier </li></ul>
  8. 8. WMS: Air & Vapor Barriers (AVB) <ul><li>Most materials are effective </li></ul><ul><ul><li>AIR Barriers </li></ul></ul><ul><ul><ul><li>Needs to be continuous </li></ul></ul></ul><ul><ul><ul><ul><li>Intersections between wall/roof, floors, foundation </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Interface of wall assembly & door/window/curtain walls </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Penetrations thru AB </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Joints/seams between sheets/boards of AB </li></ul></ul></ul></ul><ul><li>Few materials are complete </li></ul><ul><ul><li>VAPOR Barriers </li></ul></ul><ul><ul><ul><li>Place on warm side (winter) of Heat Barrier (insulation) </li></ul></ul></ul><ul><ul><ul><ul><li>Vapor arrested before it reaches colder surfaces </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Moist, warm air moves TO cooler, dryer air </li></ul></ul></ul></ul><ul><li>More accurate description: Vapor Retarders </li></ul>
  9. 9. WMS: Components <ul><li>Air and Vapor Barriers </li></ul><ul><li>Heat Barrier </li></ul><ul><li>Flashing </li></ul><ul><li>Water Barrier </li></ul>
  10. 10. WMS: Heat Barrier (Insulation) <ul><li>Heat Transfer </li></ul><ul><ul><li>Decrease as the wall’s thermal resistance increases </li></ul></ul><ul><li>R-Value: thermal resistance </li></ul><ul><li>Common pitfalls </li></ul><ul><ul><li>Inappropriate location </li></ul></ul><ul><ul><li>Discontinuity </li></ul></ul><ul><ul><ul><li>Thermal bridging </li></ul></ul></ul><ul><ul><li>Dewpoint </li></ul></ul><ul><ul><ul><li>Condensation & staining issues </li></ul></ul></ul>
  11. 11. WMS: Components <ul><li>Air and Vapor Barriers </li></ul><ul><li>Heat Barrier </li></ul><ul><li>Flashing </li></ul><ul><li>Water Barrier </li></ul>
  12. 12. WMS: Flashing <ul><li>Main Causes of Moisture Intrusions </li></ul><ul><ul><li>Interface details </li></ul></ul><ul><ul><ul><li>Bldg envelope penetrations </li></ul></ul></ul><ul><ul><ul><ul><li>Decks </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Windows </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Doors </li></ul></ul></ul></ul><ul><ul><li>Flashing </li></ul></ul><ul><ul><ul><li>Did not exist OR were not integrated with the rest of the WMS </li></ul></ul></ul>
  13. 13. WMS: Components <ul><li>Air and Vapor Barriers </li></ul><ul><li>Heat Barrier </li></ul><ul><li>Flashing </li></ul><ul><li>Water Barrier </li></ul>
  14. 14. WMS: Water Barrier (WB) <ul><li>Forms vertical surface behind cladding </li></ul><ul><ul><li>Allows water to drain out of the wall system </li></ul></ul><ul><li>Exterior cladding protects WB </li></ul><ul><ul><li>Weather </li></ul></ul><ul><ul><li>Ultraviolet (UV) Radiation </li></ul></ul><ul><li>Lets wall components dry safety </li></ul><ul><ul><li>Allows internal vapor to escape out </li></ul></ul><ul><li>Most important deterrent against liquid water penetrating INTO the bldg enclosure </li></ul><ul><ul><li>Acts as a barricade - Continuous & shingled </li></ul></ul>
  15. 15. WMS: Components <ul><li>Map out the PASSAGE of water </li></ul><ul><ul><li>Drainage Space </li></ul></ul><ul><ul><ul><li>Allows free drainage of water </li></ul></ul></ul><ul><ul><li>Drainage Plane </li></ul></ul><ul><ul><ul><li>Water Barrier (WRB) </li></ul></ul></ul><ul><ul><ul><ul><li>Overlapping </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Integrating w/flashing </li></ul></ul></ul></ul><ul><ul><li>Flashings </li></ul></ul><ul><ul><li>Weep Holes </li></ul></ul><ul><ul><ul><li>Located DIRECTLY above flashing </li></ul></ul></ul>
  16. 16. Exterior Shell Performance <ul><li>Continual expansion & contraction </li></ul><ul><ul><li>Moisture content + Thermal </li></ul></ul><ul><li>Corrosion: Metals </li></ul><ul><ul><li>Electrolytic action causes a current to flow </li></ul></ul><ul><ul><li>Water is the electrolyte to complete the circuit </li></ul></ul><ul><ul><li>Electronic potential: </li></ul></ul><ul><ul><ul><li>Metal A + Metal B </li></ul></ul></ul><ul><ul><ul><li>Metal A + Water + Salt </li></ul></ul></ul><ul><ul><li>Example: Storing planes in the desert </li></ul></ul><ul><li>Decay: Wood </li></ul><ul><ul><li>Food (wood) + water + air+ temperature </li></ul></ul><ul><ul><li>Example: Submerged trees in water </li></ul></ul><ul><li>Efflorescence: Masonry </li></ul><ul><ul><li>Migrating water dissolves salts inside material and deposits them on it’s surface </li></ul></ul><ul><li>Leaching: Concrete & Mortar </li></ul><ul><ul><li>Leaching out the calcium from the calcium chloride </li></ul></ul>
  17. 17. Exterior Shell Performance <ul><li>(3) Types of Exterior Wall Design </li></ul><ul><ul><li>Face-Sealed Barriers </li></ul></ul><ul><ul><ul><li>EIFS (non-drainable) </li></ul></ul></ul><ul><ul><ul><li>Curtain Walls (face-sealed) </li></ul></ul></ul><ul><ul><li>Concealed Barrier Walls </li></ul></ul><ul><ul><ul><li>Stucco system (drainable) </li></ul></ul></ul><ul><ul><ul><li>EIFS (drainable) </li></ul></ul></ul><ul><ul><li>Drain Cavity or Rain Screen </li></ul></ul><ul><ul><ul><li>Brick-veneer cavity walls </li></ul></ul></ul><ul><ul><ul><li>Furred-out clapboard walls </li></ul></ul></ul><ul><ul><ul><li>EIFS (drainable w/membrane) </li></ul></ul></ul>
  18. 18. Exterior Shell Performance <ul><li>Face-Sealed Barriers </li></ul><ul><ul><li>Every seam/crack is sealed </li></ul></ul><ul><ul><li>Requires detailed workmanship </li></ul></ul><ul><ul><li>Requires continuous maintenance </li></ul></ul><ul><ul><li>Most vulnerable to rain infiltration </li></ul></ul><ul><ul><li>Effective in areas with: </li></ul></ul><ul><ul><ul><li>Low wind and low rain exposure </li></ul></ul></ul>
  19. 19. Exterior Shell Performance <ul><li>Concealed Barrier Walls </li></ul><ul><ul><li>Relies on multiple layers for rain penetration </li></ul></ul><ul><ul><li>Provides (2) lines of defense </li></ul></ul><ul><ul><li>Drainage plane in the wall assembly </li></ul></ul><ul><ul><ul><li>Usually a water-resistive barrier membrane </li></ul></ul></ul><ul><ul><li>Requires continuous maintenance </li></ul></ul><ul><ul><li>Effective in areas with: </li></ul></ul><ul><ul><ul><li>Moderate wind and moderate rain exposure </li></ul></ul></ul>
  20. 20. Exterior Shell Performance <ul><li>Drain Cavity or Rain Screen </li></ul><ul><ul><li>Relies on (2) layers + drained cavity for rain penetration </li></ul></ul><ul><ul><li>Provides (2) lines of defense </li></ul></ul><ul><ul><li>Drainage plane in the wall assembly </li></ul></ul><ul><ul><ul><li>Usually a water-resistive barrier membrane </li></ul></ul></ul><ul><ul><li>Additional features: </li></ul></ul><ul><ul><ul><li>Capillary break between porous materials </li></ul></ul></ul><ul><ul><ul><li>Freer drainage </li></ul></ul></ul><ul><ul><ul><li>Venting limits relative humidity (RH) outboard of sheathing </li></ul></ul></ul><ul><ul><li>Effective in areas with: </li></ul></ul><ul><ul><ul><li>High wind and high rain exposure </li></ul></ul></ul>
  21. 21. Exterior Shell Performance <ul><li>Drainage Wall System </li></ul>
  22. 22. Exterior Shell Performance <ul><li>Enclosure Performance depends on: </li></ul><ul><ul><li>Proper Sequencing </li></ul></ul><ul><ul><ul><li>Exposure Duration </li></ul></ul></ul><ul><ul><li>Detailing </li></ul></ul><ul><ul><ul><li>Spec vs. Drawings </li></ul></ul></ul><ul><ul><ul><li>Field vs. Pre-fab </li></ul></ul></ul><ul><ul><li>Construction Material’s Recovery </li></ul></ul><ul><ul><ul><li>Ability to get wet and then dry out </li></ul></ul></ul><ul><ul><ul><li>Not deteriorate or contaminate (microbes) </li></ul></ul></ul>
  23. 23. Flashing - Types <ul><li>Sheet Metals </li></ul><ul><ul><li>Stainless Steel </li></ul></ul><ul><ul><li>Galvanized Steel </li></ul></ul><ul><ul><li>Copper (Cold Rolled) </li></ul></ul><ul><ul><li>Copper (Lead-Coated) </li></ul></ul><ul><ul><li>Aluminum </li></ul></ul><ul><li>Composite Materials </li></ul><ul><ul><li>Copper Laminates </li></ul></ul><ul><ul><li>Aluminum Laminates </li></ul></ul><ul><ul><li>Lead Laminates </li></ul></ul><ul><li>Fabrics </li></ul><ul><ul><li>PVC </li></ul></ul><ul><ul><li>Rubberized Asphalt </li></ul></ul><ul><ul><li>EPDM </li></ul></ul>
  24. 24. Flashing – Sheet Metals <ul><li>Advantages </li></ul><ul><ul><li>Extend beyond face of wall </li></ul></ul><ul><ul><ul><li>Forms drip edge – conducts water out </li></ul></ul></ul><ul><ul><li>May be soldered </li></ul></ul><ul><ul><ul><li>Mastics or sealants need not be solely relied upon </li></ul></ul></ul><ul><ul><li>Stiffness allows for proper geometries </li></ul></ul><ul><ul><li>Can be exposed to weather </li></ul></ul><ul><ul><li>Suitable substrate for construction sealants </li></ul></ul><ul><li>Disadvantages </li></ul><ul><ul><li>More expensive than membrane flashing </li></ul></ul><ul><ul><li>Aluminum corrodes in an alkaline environment </li></ul></ul><ul><ul><ul><li>Masonry Mortar </li></ul></ul></ul><ul><ul><ul><li>Concrete </li></ul></ul></ul>
  25. 25. Flashing – Composite/Fabrics <ul><li>Advantages </li></ul><ul><ul><li>Less expensive than metal flashing </li></ul></ul><ul><ul><li>Self-sealing properties </li></ul></ul><ul><li>Disadvantages </li></ul><ul><ul><li>Must be continuously supported </li></ul></ul><ul><ul><ul><li>To avoid creating water pockets </li></ul></ul></ul><ul><ul><ul><li>To provide a solid substance for proper seaming </li></ul></ul></ul><ul><ul><li>Relies on field installer </li></ul></ul><ul><ul><ul><li>Bed & seal membrane (transverse seams) </li></ul></ul></ul><ul><ul><ul><li>Unsuitable substrate for common construction sealants </li></ul></ul></ul><ul><ul><li>Exposure issues: degradation due to sunlight </li></ul></ul><ul><ul><ul><li>Must terminate at/inboard of wall face </li></ul></ul></ul><ul><ul><ul><li>This encourages water bypass at front edge of membrane </li></ul></ul></ul>
  26. 26. Flashing – Considerations <ul><li>Main Criterion: Expected Life </li></ul><ul><ul><li>Flashing MUST last as long as life of building </li></ul></ul><ul><li>Cost </li></ul><ul><ul><li>Material Cost </li></ul></ul><ul><ul><li>Installation Cost </li></ul></ul><ul><ul><li>Maintenance Cost </li></ul></ul><ul><li>Installation </li></ul><ul><ul><li>Ease of Installation </li></ul></ul><ul><ul><li>Ease to Join </li></ul></ul><ul><ul><li>Ease of Fabrication </li></ul></ul><ul><li>Performance </li></ul><ul><ul><li>Compatibility with materials </li></ul></ul><ul><ul><li>Resistance to punctures/tears </li></ul></ul><ul><ul><li>Resistance to UV </li></ul></ul><ul><ul><li>Resistance to Corrosion </li></ul></ul>Flashing with Metal Drip Edge
  27. 27. Flashing – Comparison
  28. 28. WMS: Flashing – Where? <ul><li>Where Water Barriers (WB) terminate </li></ul><ul><li>B30 Roofing </li></ul><ul><ul><li>B3010 Roof Coverings </li></ul></ul><ul><ul><li>B3020 Roof Openings </li></ul></ul><ul><li>B20 Exterior Closure </li></ul><ul><ul><li>B2010 Exterior Walls </li></ul></ul><ul><ul><ul><li>Top of exterior walls & parapets </li></ul></ul></ul><ul><ul><ul><li>Base of exterior walls </li></ul></ul></ul><ul><ul><ul><li>Penetrations through the wall assembly </li></ul></ul></ul><ul><ul><ul><li>Shelf angles (cavity walls) </li></ul></ul></ul><ul><li>B2020 Exterior Windows / B2030 Exterior Doors </li></ul><ul><ul><ul><li>Perimeters of openings: Head, Sill, & Jamb </li></ul></ul></ul><ul><li>A10 Foundations (exposed) </li></ul>
  29. 29. Flashing: Roofing – Where? <ul><li>Terminations </li></ul><ul><ul><li>Expansion joints </li></ul></ul><ul><li>Junctions </li></ul><ul><ul><li>Examples: </li></ul></ul><ul><ul><ul><li>Penthouses </li></ul></ul></ul><ul><ul><ul><li>Skylights </li></ul></ul></ul><ul><ul><ul><li>Chimneys </li></ul></ul></ul><ul><ul><ul><li>Equipment Housing </li></ul></ul></ul><ul><ul><ul><li>Parapets </li></ul></ul></ul><ul><ul><li>Thru-wall needs to lead water out of the wall </li></ul></ul><ul><ul><li>Parapets: exposed on exterior, interior and top </li></ul></ul>
  30. 30. Flashing: Roofing – Where? <ul><li>Penetrations </li></ul><ul><ul><li>Examples: pipes, ducts </li></ul></ul><ul><ul><li>Group many into a single curb </li></ul></ul><ul><ul><li>Differential movement </li></ul></ul><ul><ul><li>If connected- flashing flexible to move with it </li></ul></ul><ul><ul><li>Minimize quantity </li></ul></ul><ul><ul><li>Small pipes/ducts </li></ul></ul><ul><ul><ul><li>Separate support for base flashing not used </li></ul></ul></ul><ul><ul><ul><li>Sleeves (metal or plastic flanged): require frequent maintenance </li></ul></ul></ul><ul><ul><ul><li>Counterflashing + cover </li></ul></ul></ul><ul><li>Joints </li></ul>
  31. 31. Flashing: Roofing <ul><li>Prevents water from penetrating exterior surface </li></ul><ul><ul><li>Intercepts water at parapets, walls, penetrations </li></ul></ul><ul><ul><li>Diverts it </li></ul></ul><ul><ul><li>Leads it out to the membrane </li></ul></ul><ul><ul><li>Flows out to the roof drains </li></ul></ul><ul><li>Think of roof membrane as one large flashing designed to hold water until drainage system takes over </li></ul><ul><li>Detail Components </li></ul><ul><ul><li>Base flashing </li></ul></ul><ul><ul><li>Counter-flashing </li></ul></ul><ul><ul><li>Cap flashing </li></ul></ul>Concrete Roof Slab Dtl
  32. 32. Base Flashing (Roofing) <ul><li>Extension of the roof membrane or a different material bonded to form a waterproof joint </li></ul><ul><li>Extends upward along vertical surface </li></ul><ul><li>Diverts water onto the membrane </li></ul><ul><li>Pass over top of parapet or cant </li></ul><ul><ul><li>Minimize of water leaking behind it </li></ul></ul><ul><ul><li>Liquid-applied: not suitable </li></ul></ul><ul><ul><ul><li>Cannot be carried over a parapet/roof-wall joint </li></ul></ul></ul><ul><ul><li>Reach higher than water could be “stored” </li></ul></ul>
  33. 33. Counter-Flashing (Roof) <ul><li>Description </li></ul><ul><ul><li>Carries water onto base flashing/membrane </li></ul></ul><ul><ul><li>Covers vertical face of base flashing </li></ul></ul><ul><ul><li>Secured to the parapet or wall cladding </li></ul></ul><ul><ul><li>Not connected to base flashing </li></ul></ul><ul><ul><li>Provides physical and UV protection for base flashing </li></ul></ul><ul><ul><li>Not expected to watertight </li></ul></ul><ul><li>May not be required with some roofing types: </li></ul><ul><ul><li>Modified bitumen </li></ul></ul><ul><ul><li>Single-ply membranes </li></ul></ul><ul><li>If not required, don’t include it </li></ul><ul><ul><li>Covers up defects & hinders maintenance </li></ul></ul><ul><li>Details requiring reglets should be avoided </li></ul>
  34. 34. Cap Flashing (Roof) <ul><li>Horizontal coverings for parapets & expansion joints </li></ul><ul><li>Sloped toward roof </li></ul><ul><li>Secured to allow differential movement </li></ul><ul><li>Not expected to watertight </li></ul><ul><li>Provides physical and UV protection for base flashing </li></ul><ul><li>Only aesthetic with some roofing types: </li></ul><ul><ul><li>Modified asphalt </li></ul></ul><ul><ul><li>Single-ply membranes </li></ul></ul>
  35. 35. Cap Flashing (Roof)
  36. 36. Roof Flashing - Summary <ul><li>Compatibility between base flashing & the membrane </li></ul><ul><li>Ease of right angle turns in built-up roofs </li></ul><ul><ul><li>Cants prevents puncturing of flashing membranes </li></ul></ul><ul><li>Differential movement </li></ul><ul><ul><li>Counterflashing and wall/parapet it is secured </li></ul></ul><ul><ul><li>Roof deck and wall/parapet </li></ul></ul><ul><li>Failure of reglet seals </li></ul><ul><ul><li>Caulk not maintained </li></ul></ul><ul><ul><li>Counterflashing moves </li></ul></ul>
  37. 37. Flashing: Walls – Where? <ul><li>Critical Locations </li></ul><ul><ul><li>Top of the Wall </li></ul></ul><ul><ul><ul><li>Parapet </li></ul></ul></ul><ul><ul><li>Openings </li></ul></ul><ul><ul><ul><li>Head </li></ul></ul></ul><ul><ul><ul><li>Sill </li></ul></ul></ul><ul><ul><ul><li>Jamb </li></ul></ul></ul><ul><ul><li>Through Wall </li></ul></ul><ul><ul><ul><li>Shelf Angles </li></ul></ul></ul><ul><ul><li>Base of Wall </li></ul></ul><ul><ul><ul><li>Where wall rests on foundation </li></ul></ul></ul>
  38. 38. Flashing: Openings
  39. 39. Flashing: Head Window Head Detail and Cavity Seal
  40. 40. Flashing: Head
  41. 41. Flashing: Window Lintel
  42. 42. Flashing Details - Sills
  43. 43. Flashing Details - Sills
  44. 44. Flashing: Window Sill Commercial aluminum window in metal stud with exterior gypsum board sheathing
  45. 45. Flashing: Window Sill
  46. 46. Flashing: Interruptions        Lipped Brick Detail
  47. 47. Flashing: Base of Wall
  48. 48. Flashing: Base of Wall Base flashing with concrete wall backup and masonry veneer
  49. 49. Flashing: Base of Wall
  50. 50. Flashing: Base of Wall
  51. 51. Flashing: Coordination
  52. 52. Flashing: Critical Details <ul><li>Critical Details </li></ul><ul><ul><li>Inner & Outer Corners </li></ul></ul><ul><ul><ul><li>Field Fabricated </li></ul></ul></ul><ul><ul><ul><li>Preformed Corners </li></ul></ul></ul><ul><ul><li>Lapping </li></ul></ul><ul><ul><ul><li>Horizontal – Flashing </li></ul></ul></ul><ul><ul><ul><li>Vertical – Water Barrier </li></ul></ul></ul><ul><ul><li>Terminations </li></ul></ul><ul><ul><ul><li>Drip Edges </li></ul></ul></ul><ul><ul><ul><li>End Dams </li></ul></ul></ul><ul><ul><ul><ul><li>6”-8” beyond jamb </li></ul></ul></ul></ul><ul><ul><li>Keep Air Space (AS) clean </li></ul></ul><ul><ul><ul><li>Veneer (wood frame): 1” </li></ul></ul></ul><ul><ul><ul><li>Veneer (steel frame): 2” </li></ul></ul></ul><ul><ul><ul><li>Cavity (w/rigid insul): 1” </li></ul></ul></ul><ul><ul><ul><li>Cavity (w/no insul): 2” </li></ul></ul></ul><ul><ul><ul><li>Cavity (w/rigid insul & drainage panel): 0- 3/8” </li></ul></ul></ul>
  53. 53. Conclusion <ul><li>Water: BAD - Flashing: GOOD </li></ul><ul><li>Flashing Rules of Thumb </li></ul><ul><ul><li>Continuity </li></ul></ul><ul><ul><li>Extend past face of wall </li></ul></ul><ul><ul><ul><li>Divert water OUT </li></ul></ul></ul><ul><ul><li>Seal top of flashing (water barrier) </li></ul></ul><ul><ul><li>Protect flashing from punctures </li></ul></ul><ul><li>Managing water with a SYSTEM </li></ul><ul><ul><li>Ounce of prevention = Pound of cure </li></ul></ul><ul><ul><li>Initial cost < Future Repair / Liability </li></ul></ul>
  54. 54. Conclusion <ul><li>Q uestions??? </li></ul><ul><li>C omments??? </li></ul><ul><li>C oncerns??? </li></ul><ul><li>S uggestions??? </li></ul>
  55. 55. Water Management F L A S H I N G T H A N K Y O U
  56. 56. Detailing – Detail on CD’s
  57. 57. Detailing – Detail on CD’s
  58. 58. Detailing – Sequencing A
  59. 59. Detailing – Sequencing B
  60. 60. Detailing – Sequencing C
  61. 61. Detailing – Sequencing D
  62. 62. Detailing – Sequencing E
  63. 63. Detailing – Sequencing F
  64. 64. Detailing – Sequencing G
  65. 65. Detailing – Sequencing H
  66. 66. Detailing – Sequencing I

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