mtlogcabin
SAWHORSE
Contractor called yesterday about the minimum curb height on a roof top unit. The mall re-roofed about 2 years ago and as is typical they installed about 4 inches of insulation which lowered the curbs height from 12 to about 8 inches. Now the HVAC contractor is going to be replacing some of the rooftop units and is asking if he need to extend the curbs. I can't find a minimum curb height requirement. Is there one and if there is would he be required to raise the existing curbs to that requirement? 2009 I-Codes