| Building Element |
Amount of Insulation |
- Attics: If currently R-0 to R-10.9 " " R-11 to R-18.9 " " R-19 or more, |
then bring to R-38 then add R-19 then OK |
- Box sills: If currently R-0 to R-2.5 " " R-2.6 to R-10.9 " " R-11 or more, |
then bring to R-19 then add R-11 then OK |
| - Heating supply ducts located in vented spaces |
R-5 |
- Steam heating pipes in vented space - Hydronic heating pipes in vented space - Water heater piping in vented spaces |
R-4 R-2 R-2 |
- For first 5 feet on both lines from noncirculating heaters - Total length of both lines from circulating heaters |
|
| - Access openings to attics or other vented spaces: |
|
Horizontal openings Vertical openings |
R-19 R-5 |