27203 Thermal and Moisture Protection Continued

The insulating value of reflective insulation depends upon ______.

• the thickness of the material

• the number of reflective surfaces

• the presence of a vapor barrier

• proper ventilation

When cutting flexible insulation to prepare for installation, measure the height of a wall cavity (space between studs), then add ______.

• 2"

• 3"

• 4"

• 5"

Before applying rigid insulation to the exterior of a foundation, the foundation wall should be ______.

• sealed

• sprayed with a primer

• waterproofed

• roughened for good adhesion

Rigid insulation is usually installed around the perimeter of a concrete slab, under the slab to a distance from the edge of ______.

• 8" to 12"

• 12" to 18"

• 18" to 24"

• 24" to 36"

For flat roofs, ventilation is achieved by a combination of eave vents and ______.

• roof stacks

• parapet louvers

• ridge vents

• venturi tubes

Moisture dissipation from attic spaces occurs through a combination of wind-induced ventilation and ______.

• convection

• radiation

• conduction

• diffusion

A vapor barrier material that is totally impermeable will have a perm rating of ______.

• 0.0

• 0.5

• 1.0

• 1.5

A vapor barrier is any material with a perm rating of less than ______.

• 0.01

• 0.05

• 0.0

• 1.0

Asphalted kraft paper is usually incorporated with ______.

• semirigid insulation

• blanket or batt insulation

• reflective insulation

• structural foam insulation

Of moisture entering a structure, migration of moisture from the ground below the building accounts for up to ______.

• 50 percent

• 60 percent

• 70 percent

• 80 percent