TDS

2012 International Energy Conservation Code Climate Zones
NEW WOOD-FRAMED HOUSES
Zone Heating System Attic
Cathedral
Ceiling
Wall
Floor
Cavity
Insulation
Sheathing
1
All R-30 to R-49 R-22 to R-38 R-13 to R-15 None R-13
2
Gas, oil, heat pump
R-30 to R-60 R-22 to R-38 R-13 to R-15 None
R-13,
R-19, R-25
Electric furnace
3
Gas, oil, heat pump
R-30 to R-60 R-22 to R-38 R-13 to R-15
None
R-25
Electric furnace R-2.5 to R-5
4
Gas, oil, heat pump
R-38 to R-60 R-30 to R-38 R-13 to R-15
R-2.5 to R-6
R-25 to R-30
Electric furnace R-5 to R-6
5
Gas, oil, heat pump
R-38 to R-60
R-30 to R-38 R-13 to R-15 R-2.5 to R-6
R-25 to R-30
Electric furnace R-30 to R-60 R-13 to R-21 R-5 to R-6
6
All R-49 to R-60 R-30 to R-60 R-13 to R-21 R-5 to R-6 R-25 to R-30
7
All R-49 to R-60 R-30 to R-60 R-13 to R-21 R-5 to R-6 R-25 to R-30
8
All R-49 to R-60 R-30 to R-60 R-13 to R-21 R-5 to R-6 R-25 to R-30
EXISTING WOOD-FRAMED HOUSES
Zone
Add Insulation to Attic
Floor
Uninsulated Attic Existing 3-4 Inches of Insulation
1
R-30 to R-49 R-25 to R-30 R-13
2
R-30 to R-60 R-25 to R-38 R-13 to R-19
3
R-30 to R-60 R-25 to R-38 R-19 to R-25
4
R-30 to R-60 R-38 R-25 to R-30
5-8
R-49 to R-60 R-38 to R-49 R-25 to R-30
WALL INSULATION
Whenever exterior siding is removed on an:
• Uninsulated wood-frame wall:
• Drill holes in the sheathing and blow
insulation into the empty wall cavity before
installing the new siding
• Zones 3–4:
• Add R-5 insulative wall sheathing beneath the
new siding.
• Zones 5–8:
• Add R-5 to R-6 insulative wall sheathing
beneath the new siding.
• Insulated wood frame wall, for Zones 4–8:
• Add R-5 insulative sheathing before installing
the new siding.
Reference: DOE/CE-0180 2008. Insulation Fact Sheet