The required degree of insulation ("R" value) shall be achieved by:
R-4 | 3/4" Styrofoam or its equivalent |
R-7 | 2" Styrofoam or its equivalent |
R-11 | 3-1/2" Fiberglass or its equivalent |
R-18 | 2" Urethane or its equivalent |
R-19 | 6" Fiberglass or its equivalent |
(Ord. 1182AC. Passed 3-15-76.)