Lecture 4 - Insulation Materials

Question 1

What are the factors of insulation materials?

Answer 1

1. Strength (structural capability)
2. Stability & durability
3. Moisture sensitivity
4. Hygroscopicity
5. Flammability
6. Acoustic performance
7. Thermal performance
8. Environmental performance
9. Toxicity
10. Cost-effectiveness

Question 2

Define Hygroscopicity

Answer 2

The ability of a material to absorb or release water vapour as a function of humidity.

Insulation materials must be non-hygroscopic and non-porous.

Question 3

What are the qualities of MINERAL WOOL?

Answer 3

λ = 0.037-0.054
Load-bearing capacity: very low-moderate
Fire resistance: high
Noise reduction: high

Question 4

What are the qualities of PERLITE?

Answer 4

λ = 0.045-0.070
Load-bearing capacity: high
Fire resistance: high
Noise reduction: high

Good for subfloor

Question 5

What are the qualities of FOAM GLASS?

Answer 5

λ = 0.055-0.066
Load-bearing capacity: high
Fire resistance: low
Noise reduction: —