Does a building with a SIP roof need to be ventilated?

The area inside a SIP building envelope is considered conditioned space and will be ventilated by the building’s HVAC system. There is no need to provide a vented attic beneath a SIP roof, and doing so would compromise the conditioned space of the building. 

Some building science experts recommend venting the roof by providing an air space between the SIP roof panels and the roofing material (known as a “cold roof”). Although this best practice is not a requirement for SIP buildings, it is a sensible extra measure to improve the durability and moisture resistance of the building.