Ch. 41 Moisture Protection and Thermal Insulation

Question 1

How would you apply a bitumous coating to the exterior side of a foundation wall?

Answer 1

You would either Brush or Spray this type of coating

Question 2

Why would you apply a cementitious coating to the exterior side of masonry or concrete foundation wall?

Answer 2

In order to provide a smooth surface to to apply a waterproof membrane to. Sometime powdered Iron will be mixed into the portland cement as an add mixture to provide a tighter seal

Question 3

_______ is the control of moisture and water that is subject to hydrostatic pressure.

Answer 3

Water-proofing is the control of moisture and water that is subject to hydrostatic pressure.

Question 4

What is a geotextile mat?

Answer 4

A mat that can be used to alleviate hydrostatic pressure

Question 5

__________ is the flow of heat within a material or between materials without displacement of particles.

Answer 5

Conduction is the flow of heat within a material or between materials without displacement of particles.

Question 6

________ is the transfer of heat within a fluid, either gas or liquid, by the movement of the fluid from an area of higher temperature to an are of lower temprature

Answer 6

Convection is the transfer of heat within a fluid, either gas or liquid, by the movement of the fluid from an area of higher temperature to an are of lower temprature

Question 7

What is the best theoretical type of insulation?

Answer 7

a vacuum

Question 8

What is R-Value?

Answer 8

R-Value or the reistance of a material is measured by the number of hours needed for 1 BTU to pass through 1 Square Foot of material

Question 9

T/F The lower the materials K-value or C-Value (conductance) the better the insulating qualities.

Answer 9

True

Question 10

What is the reciprocal of R-Value?

Answer 10

k-Value (C-Value)

Question 11

What does LTTR stand for?

Answer 11

Long Term Thermal Resistance

Question 12

How is LTTR measured

Answer 12

It is the averaged R-Value of a material across a 15 year period

Question 13

What is the formula for R-Value

Answer 13

R= (Temperature Difference * Area * Time) / Total heat loss

Question 14

What is a radiant barrier?

Answer 14

A radiant barrier is a single sheet of highly reflective material, usually aluminum that faces an open airspace, it is used to reduce the passage of thermal radiation.

Question 15

What is reflective insulation?

Answer 15

Reflective insulation is the combination of a radiant barrier with thermal insulation.

Question 16

What is emissivity in regards to radiant barriers?

Answer 16

a number between 0 and 1 that indicates the amount of energy that by conduction is absorbed through the material and is emitted back into the building.

Question 17

In regards to roofing what are the properties of a Thermoset Plastic roof?

Answer 17

They are hardened by heat and cannot be reheated without irreversible damage.

Question 18

What are 4 examples of thermoplastic roofing?

Answer 18

EPDM - only available in black
CPSE (Hypalon) - highly resistant to weathering and available in white
PVC - Available in White seams have to be sealed or mechanically fastened, very inexpensive
TPO - Low install cost relative to EPDM, and is available in white

Question 19

Low performance joints are used where there is less than ____ movement

Answer 19

5% movement

Question 20

Intermediate performance joints are used where there is less than ____ movement

Answer 20

12.5% movement

Question 21

High performance joints are used where there is less than ____ movement

Answer 21

Up to 25% movement

Question 22

What should the sealant depth be for joint widths between 0-1/2”

Answer 22

equal to the width

Question 23

What should the sealant depth be for joint widths between 1/2”-1”

Answer 23

1/2”

Question 24

What should the sealant depth be for joints with width’s greater than 1”

Answer 24

Joints should be half the width