Moisture Protection and Thermal Insulation Flashcards Preview

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Flashcards in Moisture Protection and Thermal Insulation Deck (24):
1

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

You would either Brush or Spray this type of coating

2

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

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

3

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

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

4

What is a geotextile mat?

A mat that can be used to alleviate hydrostatic pressure

5

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

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

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

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

7

What is the best theoretical type of insulation?

a vacuum

8

What is R-Value?

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

9

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

TRUE

10

What is the reciprocal of R-Value?

k-Value (C-Value)

11

What does LTTR stand for?

Long Term Thermal Resistance

12

How is LTTR measured

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

13

What is the formula for R-Value

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

14

What is a radiant barrier?

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.

15

What is reflective insulation?

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

16

What is emissivity in regards to radiant barriers?

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.

17

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

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

18

What are 4 examples of thermoplastic roofing?

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

19

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

5% movement

20

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

12.5% movement

21

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

Up to 25% movement

22

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

equal to the width

23

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

1/2"

24

What should the sealant depth be for joints with width's greater than 1"

Joints should be half the width