Material Characteristic | THI Pultrusions | Extruded Aluminum | Vinyl | Wood | Steel |
Strength to Weight | High | High | Low | Low | High |
Thermal Conductivity | Low | High | Low | Low | High |
Expansion & Contraction | Low | High | High | Low* | Medium |
Corrosion and/or Chemical Resistance | High | Medium | Medium | Medium** | Low |
Electrical Conductivity | Low | High | Low | Low | High |
* Wood expands due to moisture absorption. ** Wood is susceptible to insect damage and mould. |