used but remain in use in some older buildings such as asbestos fibers and urea.

Consideration of materials used

Factors affecting the type and amount of insulation to use in a building include:
* Thermal conductivity
* Moisture sensitivity
* Compressive strength
* Ease of installation
* Durability - resistance to degradation from compression, moisture, decomposition, etc.
* Ease of replacement at end of life
* Cost effectiveness
* Toxicity
*

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