Guadalupe-Saldaña Net Zero Subdivision has been qualified as the 5 star Green Building under the AEGB rating system.
* AEGB: Austin Energy Green Building Single Family Rating System
side note: to qualify for this rating, the project must also meet City of Austin Energy Code
City of Austin Energy Code:
City of Austin has adopted the 2012 IECC code.
2012 IECC code:
The insulation and fenestration requirements for climate zone 2 (Austin):
Fenestration: U 0.4, Skylight: U 0.65, glazing SHGC: 0.25,
Ceiling: R 38, Wood Frame wall: R 13, Mass Wall R 4/6, Floor: R 13, Basement wall: R 0, Slab: R 0, Crawl space: R 0
Prescriptive requirement for ceiling with attic:
Full height R 30 insulation extends the wall top plate at the eaves is deemed to satisfy the R 38 requirement.