[Greenbuilding] Poly U foam and fires

[Michael Smith]

  I have read somewhere that the biggest problem with the P U foams is the temperature range the fire creates. Normal temp in a house fire is around 3500 degrees , leaving many items recognizable after destroyed. The higher insulative value and reflection back of the heat generated in a super insulated P U foamed house reaches closer to 10,000 degrees. Most materials are turned to ash and not recognized. 
 I would just take extra care in the wiring ( higher than code) to minimize the chances.