Texas Climate Zones and Recommended R-Values
Texas spans multiple climate zones, each with slightly different insulation needs. Here’s a more detailed breakdown:
Zone 2 (South Texas, including Houston)
- Minimum R-Value: R-30
- Optimal R-Value: R-38 to R-49
- Insulation Depth: 10-14 inches
Zone 3 (Central Texas, including Dallas and Austin)
- Minimum R-Value: R-38
- Optimal R-Value: R-49 to R-60
- Insulation Depth: 12-16 inches
Zone 4 (North Texas, including Fort Worth)
- Minimum R-Value: R-38
- Optimal R-Value: R-49 to R-60
- Insulation Depth: 12-18 inches
