PDX_20_Thermal & Moisture Protection

Question 0

A material that reduces the rate at which water vapor can move through material

Answer 0

Vapor diffusion retarder

Question 1

Membrane that controls air leaks into and out of the building envelope

Answer 1

Air barrier

Question 2

Unit of permeability for a given material, expressing the resistance of the material to the penetration of moisture. One unit equals flow of one grain of water vapor through one square foot of surface per hour for the pressure difference of 1 inch of mercury.

Answer 2

Perm

Question 3

The process of sealing ducts, openings and cracks to prevent air leakage

Answer 3

Air sealing

Question 4

Insulation types:

Fiberglass, mineral wall, plastic fibers, natural fibers.
Use an unfinished walls, foundation walls, floors, ceilings.
Fitted between studs, joints, and beams.
Suited for standard stud spacing.

Answer 4

Blanket

batts and roll

Question 5

Insulation types:

Foamboard placed on the outside for new construction and inside for existing.
Used an unfinished walls, foundation walls.
Insulating cores increase wall R-value.

Answer 5

Concrete block and insulated concrete block.

Question 6

Insulation types:

Polystyrene, polyisocyanurate, polyurethane.
Used in unfinished walls, foundation walls, floors, ceilings, unneeded low slope roofs.
Interior application must be covered with gypsum board for fire safety. Exterior application must be covered with weatherproof facing.

Answer 6

Foamboard or rigid foam

Question 7

Insulation types:

Foam boards are blocks. Used an unfinished walls, foundation walls. Part of the building structure, the insulation is literally built-in.

Answer 7

Insulating concrete forms

Question 8

Insulation types:

Cellulose, fiberglass, mineral wall.
Enclosed existing wall or new wall cavity, unfinished attic floors, hard-to-reach places.
Good for adding extra insulation.

Answer 8

Loose fill and blow in

Question 9

Insulation types:

For oil faced craft paper, paper film, polyethylene bubbles, cardboard.
Unfinished walls, ceilings, and floors. For oil, films or paper fitted between woodframe studs, joists, rafters, beams.

Answer 9

Reflective systems

Question 10

Insulation types:

Fiberglass, mineral wool.
Ducts and unconditioned spaces, high temp spaces.

Answer 10

Rigid fibrous or fiber insulation

Question 11

Insulation types:

Cementitious, lick, phenolic, polyisocyanurate, polyurethane.
Use it in close to existing wall, new walls, unfitted attic floors.
Good for adding insulation

Answer 11

Sprayed foam and foam in place

Question 12

Insulation types:

Foamboard or liquid foam insulation, struck or insulation.
Unfinished walls, ceilings, floor, and roofs.
Provide superior and uniform insulation.

Answer 12

Structurally insulated panels

SIPs

Question 13

This percentage of heating energy is lost due to infiltration

Answer 13

25-40%

Question 14

These provide a continuous plane of airtightness with all moving joints made flexible will still being sealed

Answer 14

Air barriers

Question 15

Types of air barriers:

Answer 15

Mechanically attached (TYVEK)
South of here.
Fluid applied.
Closed cell.
Boardstock.

Question 16

Vapor diffusion retarder’s,
a.k.a. vapor barrier’s,
are located on this side of the insulation.

Answer 16

Located on the warm side of the insulation.

That’s the plastic you staple over batt insulation

Question 17

Vapor barrier’s only return moisture due to defusion most moisture actually get in via:

Answer 17

Capillary action or through air leaks.

Question 18

There are three classes of vapor retarder’s:

Answer 18

Class 1, less than one perm.
Class 2, 1-10 perms.
Class 3, 10 or more perms.

Question 19

Thermal movement is easy to calculate, moisture:

Answer 19

Not.