HUD Requirement

• Section B on page 150 of the Code of Federal Regulations states that in order to provide uniform heat transmission in manufactured homes, spaces in walls, floors and ceilings have to be insulated.
  
  

Placement

• Insulation in premanufactured homes is placed underneath the electric, water and sewer lines in order to protect the lines from the elements.
  
  

Standards

• As of November 2010, premanufactured homes must be insulated according to guidelines set forth by HUD in 1994. The guidelines require floors in double wide premanufactured homes to have floor insulation of R-14, R-19, or R-22 depending on what part of the country the home is manufactured for.