Permeability Performance
| Parameter |
Porosity |
| Units |
Square inch seconds per deciliter |
| Description of Property |
The more porous a material is, the more water/air is allowed to pass through the material and overall wall system. |
| Parameter |
Infiltration Rate
|
| Units |
Inches |
| Description of Property |
Some materials can withstand water/air penetration during normal conditions but can fail when under more extreme pressure conditions. |
| Parameter |
Thermal Expansion/Contraction |
| Units |
It is usually expressed as a fractional change in length or volume per unit temperature change. (http://www.britannica.com/eb/article-9072069/thermal-expansion)
|
| Description of Property |
Individual materials contain different properties for thermal expansion. Thermal expansion comes into play when joining two different types of materials with different thermal expansion rates. |
References:
Peterson, Eric. "Hokie Stone Masonry Cladding Systems." BC 2064 Class. Virginia Tech, Blacksbu |
