Thanks Paul, I know many that read the VBCOA also review this forum because it's more active.Paul Sweet said:This is interesting.I don't see any reference to energy codes in Chapter 9. Chapters 6 to 8 require alterations to comply with the IECC or IRC, but spaces that are just used for a different purpose than originally don't have to be upgraded.
If you use the prescriptive metnod, 307.5 would require compliance with the IECC, unless the original use was very energy intensive. The prescriptive method might be the only option in Virginia, because 301.1.1 requires compliance with this chapter or one of the methods in 101.5, but Virginia amendments to Chapter 1 changed 101.5 so it doesn't list any methods.
It might be good to also post this on the VBCOA website.