Energy-Efficient Window Replacement in Boise, ID
Your complete guide to Idaho energy codes, climate zone requirements, and window installation
Quick Facts: Boise Window Replacement
Average Costs
- • Full installation: $380-1,000 per window
- • Double-pane: $330-650
- • Typical time: 1-2 weeks
Energy Requirements
- • Climate zone: IECC Zone 5B (Cold-Dry)
- • U-factor: U-0.32 or lower for residential windows
- • 20+ certified installers
Boise's Cold Semi-Arid Climate & Energy Needs
Summer Average
91°F (33°C)
Winter Average
30°F (-1°C)
Heating Days
5,800
Cooling Days
1,000
Climate Zone: IECC IECC Zone 5B (Cold-Dry)
Climate Challenges for Windows
- ▸Wide temperature range (-10°F to 100°F+)
- ▸Heating costs significant in winter
- ▸Moderate cooling needs in summer
- ▸Low humidity affects seal longevity
- ▸Thermal cycling stresses frames
- ▸Occasional severe weather (ice, hail)
Idaho Energy Code Requirements
Energy Code
Idaho adopts IECC 2018
U-Factor Requirement
Windows must meet U-0.32 or lower for residential windows maximum. Lower is better for insulation.
Solar Heat Gain (SHGC)
No specific SHGC requirement to reduce cooling costs.
Permits
Idaho requires building permits for window replacement. Installer should handle permits and inspections.
Frequently Asked Questions
How much does window replacement cost in Boise?
Full installation: $380-1,000 per window per window. Double-pane glass: $330-650. Pricing depends on size, type, and energy ratings required by IECC Zone 5B (Cold-Dry).
What are common window problems in Boise?
- Seal failure from temperature extremes
- Condensation in winter months
- Energy loss through older windows
- Thermal stress cracks
Should I choose double-pane or triple-pane?
Triple-pane recommended for Boise's cold climate (5800 heating days). Cuts heating costs 20-30%.