Building Envelope Sheet

How does P2000 enhance the standard building envelope?

In today’s marketplace, insulation is sold based on center of cavity thermal resistance, or R-value. However, R-value is only one piece of the thermal equation. A list of common issues that plague conventional insulations when installed in a building
envelope include:

  • Conductive heat loss
  • Air leakage and convective heat loss (can be 35% of heat loss/gain in a building envelope)
  • Moisture infiltration (water is highly conductive)
  • Radiative heat loss (can be 55% of heat transfer in ordinary air spaces)
  • Installation deficiencies
  • Thermal bridging (average of 25% of a residential building’s surface area is framing)
  • Long term stability

Most of the thermal performance testing completed on conventional insulations focus on their resistance to conductive heat transfer as measured by R-value in the ASTM C518 test. This standard laboratory test measures thermal resistance under a specific set of conditions. In reality, R-value of a particular material is dependent on a number of environmental and installation parameters, external to the material itself.

P2000 enhances the building envelope

Being a system based insulating product, P2000 is engineered to work with the other building assembly components to minimize heat loss by the mechanisms previously outlined. When reflective materials are incorporated in the building envelope, the combination of orientation as well as air spaces can elevate the performance of a wall, ceiling or floor assembly well beyond the recognized R-values of the building materials alone.