John Straube 2005 61 University of Waterloo, School of Architecture Waterloo, Patio Waterloo, Patio Buffalo, NY Buffalo, NY John Straube 2005 62 University of Waterloo, School of Architecture Freeze-thaw Must be nearly saturated while freezing Factors – degree of saturation – how cold – rate of freezing – pores size distribution – liquid diffusivity John Straube 2005 63 University of Waterloo, School of Architecture John Straube 2005 64 University of Waterloo, School of Architecture Dissolution Water is the universal solvent Avoid capillary saturation e.g.: – EIFS finish re-emulsification – Gypsum becomes goo – paper unglues
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John Straube 2005
61
University of Waterloo, School of Architecture
Waterloo, PatioWaterloo, Patio
Buffalo, NYBuffalo, NY
John Straube 2005
62
University of Waterloo, School of Architecture
Freeze-thaw
Must be nearly saturated while freezingFactors– degree of saturation– how cold– rate of freezing– pores size distribution– liquid diffusivity
John Straube 2005
63
University of Waterloo, School of Architecture John Straube 2005
64
University of Waterloo, School of Architecture
Dissolution
Water is the universal solventAvoid capillary saturatione.g.:– EIFS finish re-emulsification– Gypsum becomes goo– paper unglues
John Straube 2005
65
University of Waterloo, School of Architecture
If it doesnIf it doesn’’t get wet andt get wet andcan dry out againcan dry out againit will lastit will last
Slide66University of Waterloo, School of Architecture
Rain Control Principles
John Straube 2005
67
University of Waterloo, School of Architecture
Wetting - Sources & Mechanisms
1.1. Interior and Exterior Air (Vapour)– transport by diffusion and air leakage
University of Waterloo, School of ArchitectureRamsey & Sleeper John Straube 2005
116
University of Waterloo, School of Architecture
John Straube 2005
117
University of Waterloo, School of Architecture
DryingClear Air Spaces
Vent Holes Above& Below Window
Vent Holes at Top& Bottom of Wall
•Important for some systems that retain drain water•Helps for small leaks
John Straube 2005
118
University of Waterloo, School of Architecture
John Straube 2005
119
University of Waterloo, School of Architecture
Notes:
1] Coordinate installation ofGold Guard system andEIFS with the roofinstallation.Typically, the step anddiverter flashings areinstalled as part of theroof assembly.
2] Refer to Sto detail 10.62afor integration of GoldGuard system with thestep and diverterflashings.
3] Install the starter track2“ (50mm) above thefinished roof and buttingagainst the diverterflashing so waterdraining down the startertrack will not flow overinto the wall.
4] Install Sto Gold Fill™over the upper edge ofthe starter track andcoat with Sto GoldCoat™.
Substrate
Sto adhesive
Sto insulation
Sto base coat
Sto finish
Sto Gold Coat
Sto Gold Fill with StoDetail Mesh
Starter track with weepsinstalled over stepflashing and Sto GoldFill (see Sto detail10.62a)