Air barriers vs vapor barriers

 0    39 flashcards    jarekkaminski
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Question English Answer English
Airflow
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transports moisture
Vapor diffusion
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moves through walls
Moisture transport
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damages buildings
Condensation surface
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collects water
Air leakage
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causes mold
Vapor pressure
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pushes steam
Hygrothermal
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combines
Wetting
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soaks material
Drying potential
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removes water
Accumulation
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builds up inside
Air barrier
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blocks air
Vapor barrier
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stops vapor
Vapor retarder
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slows diffusion
Vapor permeable
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breathes out
Vapor impermeable
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seals assembly
Housewrap
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protects exterior
Polyethylene
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acts as barrier
Smart membrane
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reacts to humidity
Perforated
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has holes
Continuous
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covers everything
Wall assembly
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contains layers
Gypsum board
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finishes interior
Sheathing
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covers studs
Cavity
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holds insulation
Fiberglass batt
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insulates frame
Rigid foam
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adds R-value
Plywood
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strengthens wall
Stud
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supports structure
Joints and seams
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require tape
Mold growth
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destroys health
Structural rot
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eats wood
Durability issues
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shorten life
Energy loss
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increases costs
Thermal bridge
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transfers cold
Relative Humidity (RH)
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measures air steam
Dew point
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turns vapor to water
Convective loop
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circulates air
Driving force
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initiates movement
Building failure
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results from errors

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