Moisture Protection

Question 1

Restricting by various means the passage or migration of water or water vapor through a building assembly or construction.

Answer 1

Moisture Protection

Question 2

Air containing the maximum amount of water vapor possible at a given temperature.

Answer 2

Saturated Air

Question 3

The movement of a vapor through a porous medium resulting from a difference in vapor pressure and temperature.

Answer 3

Vapor Migration

Question 4

A dispersion in air of water molecules, esp as produced by evaporation at ambient temperatures rather than by boiling.

Answer 4

Water Vapor

Question 5

A gas at a temperature below its critical temperature.

Answer 5

Vapor

Question 6

The pressure exerted by the molecules of a vapor in a mixture of gases, such as the pressure exerted by water vapor in air.

Answer 6

Vapor Pressure

Question 7

A liquid reduced from a vapor or vapor mixture, such as the water that forms when relatively humid air migrates into a region at or below the dew point of the air.

Answer 7

Condensation or Condensate

Question 8

The condensation that occurs when relatively humid air comes into contact with a surface at or below the dew point of the air.

Answer 8

Surface Condensation

Question 9

The gathering of moisture from the surrounding air on a surface by condensation.

Answer 9

Sweating

Question 10

A material of low permeance, as platic film or foil, installed in a construction to retard the transmission of moisture from the interior environment to a point where it can condense into water.

Answer 10

Vapor retarder or vapor barrier

Question 11

The time rate at which water vapor, un a unit pressure difference, is transmitted through a unit area of a material of a given thickness.

Answer 11

Permeance

Question 12

A unit of permeance, equal to 1 grain of water vapor transmitted per 1 sq. ft. per hour per inch of mercury pressure difference.

Answer 12

Perm

Question 13

The treatment of a masonry or concrete surface to retard the absorption of water or penetration of water vapor, either by applying a waterproof coating or by using a suitable admixture.

Answer 13

Dampproofing

Question 14

A thin coat of cement mortar for smoothing the surface of rough masonry or for sealing a masonry wall against moisture.

Answer 14

Pargin or Parget

Question 15

A membrane or coating applied to render a surface impervious to water.

Answer 15

Waterproofing

Question 16

A mixture of asphalt, graded mineral aggregate, and fine mineral matter that can be poured when heated and hardens when exposed to air, used as an adhesive, as a joint sealant, and in water proofing.

Answer 16

Asphalt Mastic

Question 17

Any of various pasty preparatins containing binuminous materials and used as an adhesive or sealant.

Answer 17

mastic

Question 18

Open-jointed tile or perforated pipe laid aound the foundation of a building for the collection and conveyance of groundwater to a point of disposal.

Answer 18

Foundation Drain

Question 19

Any of a class of synthetic fabrics used to separate soil materials, filter fine soil particles from a drainage medium, or control soil erosion.

Answer 19

Geotextile

Question 20

A geotextile fabric that allows water to pass freely into an underground drainage medium but prevents fine soil particles from entering and clogging the system.

Answer 20

Filter Fabric

Question 21

A two-part material for draining groundwater, such as from behind a foundation or retaining wall, consisting of synthetic matting or an eggcrate core, faced on one or both sides with a filter fabric.

Answer 21

Drainage Mat

Question 22

A layer or fill of crushed rock or gravel placed to ensure adequate drainage of groundwater while preventing the entry and flow of sediment and silt.

Answer 22

Gravel Drain

Question 23

A metal strip interlocking with and securing a cap flashing.

Answer 23

Cap receiver

Question 24

Flashing turned down to protect base flashing and prevent water from entering the joint.

Answer 24

Cap flashing, counterflashing

Question 25

Flashing covering and protecting the joint between a roof and the vertical surface of a wall, parapet or chimney.

Answer 25

Base Flashing

Question 26

An inclined or beveled strip changing the pitch of a roof slope or rounding out the angle between a flat roof and a parapet.

Answer 26

Cant Strip

Question 27

Pieces of sheet metal or other thin, impervious material installed to prevent the passage of water into a structure from an angle or joint.

Answer 27

Flashing

Question 28

Flashing that extends from one side of a wall to the other.

Answer 28

Through-wall Flashing

Question 29

A slight bend in the edge of a flashing forming a capilarry break.

Answer 29

Feint

Question 30

Wall construction employing a rainscreen to eliminate any difference in air pressure between the exterior and the interior that would cause rainwater to move through joints in the wall.

Answer 30

Pressure-equalized design

Question 31

A concept for preventing the penetration of wind-driven rain through a wall, utilizing a rainscreen backed by a confined air space to shiled an inner barrier where the primary air and vapor seals are located.

Answer 31

Rainscreen Principle

Question 32

An exposed outer layer of a wall, having openings designed to deter the penetration of rainwater and to equalize the air pressures on opposite sides of the facing.

Answer 32

Rainscreen

Question 33

The elasticlike force existing in the free surface of a liquid, tending to minimize the area of the surface, caused by unbalanced intermolecular forces at or near the surface.

Answer 33

Surface Tension

Question 34

A manifestation of surface tension by which the greater adhesion of a liquid to a solid surface than internal cohesion of the liquid itself causes the liquid to be elevated against a vertical surface.

Answer 34

Capillary Action, Capiliarity, Capillary attraction.

Question 35

To draw off liquid by capillary action.

Answer 35

Wick

Question 36

A space between two solid surfaces made wide enought to prevent the capillary action of moisture through the space.

Answer 36

Capillary Break

Question 37

A horizontal layer of impervious material laid in a masonry wall to prevent the capillary rise of moisture from the ground or a lower course.

Answer 37

Damp Course or Damp Check

Question 38

A metal flashing for a vent pipe projecting above a roof deck.

Answer 38

Collar

Question 39

A flange that fits around and provides a raintight seal for a vent pipe penetrating a roof deck.

Answer 39

Roof Flange

Question 40

A strip of sheet metal folded over and used as a wedge to secure flashing in a masonry joint.

Answer 40

Tag

Question 41

A tapered piece of lead for securing flashing in a reglet.

Answer 41

Lead Wedge

Question 42

A groove cut or formed in a vertical surface to receive flashing.

Answer 42

Reglet

Question 43

Flashing covering and protecting the intersection of a wall and the sloping part of a roof, consisting of L-shaped pieces that step down to follow the slope of the roof.

Answer 43

Step Flashing, Stepped Flashing

Question 44

The distance by which one sheet of flashing overlaps another.

Answer 44

Passing

Question 45

Material, such as mortar, used as a substitute for flashing where a sloping roof meets a wall.

Answer 45

Filleting

Question 46

Any of various viscous substances injected into a building joint, curing to form a flexible material that adheres to the surrounding surfaces and seals the joint against the passage of air and water.

Answer 46

Joint Sealant

Question 47

The change in width of a building joint resulting from a change in temperature.

Answer 47

Joint Movement

Question 48

The capacity of a sealant to be extended in tension.

Answer 48

Extensibility

Question 49

A joint sealant of polysulfide, polyurethane, or silicone capable of elongations up to 25%, used for sealing joints in curtain-wall systems.

Answer 49

High-range sealant

Question 50

A joint sealant of butyl rubber or acrylic capable of elongations up to 10%, used for sealing nonworking or mechanically fastened joints.

Answer 50

Medium-range sealant

Question 51

A low-range joint sealant used for filling or closing a seam, crevice or crack in order to make it watertight and airtight.

Answer 51

Caulk or Caulking

Question 52

A joint between two successive placements of concrete, often keyed or doweled to provide lateral stability across the joint.

Answer 52

Construction Joint

Question 53

A short reinforcing bar extending equally into two abutting sections of concrete to prevent differential movement.

Answer 53

Dowel

Question 54

A pipe sleeve that allows the housed element to move freely in a longitudinal direction.

Answer 54

Expansion Sleeve

Question 55

A flexible strip of rubber or plastic inserted across a concrete or masonry joint to prevent the passage of water.

Answer 55

Waterstop

Question 56

A joint between two section of a building or structure permitting thermal or moisture expansion to occur without damage to either part. _____ also serve as isolation joints and control joints.

Answer 56

Expansion Joint

Question 57

A prefabricated cover for protecting an expansion joint while allowing relative movement between the two parts being connected.

Answer 57

Expansion Joint Cover

Question 58

A continous groove or separation formed, sawed, or tooled in a concrete or masonry structure to form a plane of weakness and thus regulate the location and amount of cracking resulting from drying shrinkage or thermal stresses.

Answer 58

Control Joint

Question 59

A joint between two parts of a structure, designed to compensate for the contraction of either part.

Answer 59

Contraction Joint

Question 60

A joint separating two sections of a structure so that differential movement or settlement can occur between the parts.

Answer 60

Isolation Parts

Question 61

Any of various materials, such as polyethylene tape, used for preventing the adhesion of a sealant to the bottom of a joint.

Answer 61

Bond Breaker

Question 62

A narrow deposit of sealant applied to a building joint.

Answer 62

Bead

Question 63

The surface of a building component or joint that serves as a substrate for a sealant and to which the sealant is bonded.

Answer 63

Bond Face

Question 64

Any material that underlies and serves as a base or foundation.

Answer 64

Substrate

Question 65

A liquid for improving the adhesion of a sealant to a substrate.

Answer 65

Primer

Question 66

A compressible strip, rod, or tube of resilient material, such as neoprene or butyl, used for filling a joint, and controlling the depth of a sealant.

Answer 66

Joint Filler, Backup Rod