ROSE Construction Method™ Minimum Insulation Levels

The ROSE Construction Method Building Envelope+ has double wall, 2x4 stud construction, with dense pack cellulose insulation (R40) and 8" concrete ICF foundation walls, with 5.5" of closed-cell foam (R27).  Primary roofs have raised heel trusses with 24" min cellulose insulation (R60).  Secondary roofs, walls, and closure zones have closed-cell spray foam insulation.

 

A.  BASEMENT/LOWER LEVEL

1) Occupied Level (Conditioned) Design

  • Buried Wall-R27 ICF construction
  • Exposed Wall-R40 (same as upper level walls if wood)
  • Slab-on-Grade-R20+

2) Unoccupied Level Design

  • Buried Wall-R10 (exterior if plain concrete)
  • Buried Wall-R27 (if ICF construction)
  • Exposed Wall-R40 (same as upper level walls if wood)
  • Exposed Wall-R27 (same as above if ICF)
  • Slab-on-Grade-R10

B.  FRAMED WALLS

  • R40

C.  ROOF

  • R60

D.  WINDOWS

  • R3.5-R5

E.  DOORS

  • R3-R13