Total R-value of all building system components. The R-value is important when comparing proposals and specifications for different brands or suppliers of the same type of insulation. The insulation choice is also affected by the total building system and other components with which the insulation system must be compatible. The key is knowing that recycled content insulation products are available that meet or exceed all commonly used quality and performance standards. All insulation must meet standards regarding fire, safety and other requirements of the Uniform Building Code, the Standard Building Code and the National Building Code.
Standards vary by the type of structure and the type of insulation material.
Test results are commonly found in specific manufacturer's product literature. Most insulation is made to comply with one of the general material standards established in ASTM test procedures. Cellulose installation should meet ASTM C-739. Extruded polystyrene should meet ASTM C578, C518 and C272. Fiberglass insulation should meet ASTM D5359-93, C764, C665, C553, C547 and rock wool ASTM C764, C553, C547, Type 1 Category 1.