Energy-Efficient Window Replacement in Billings, MT
Your complete guide to Montana energy codes, climate zone requirements, and window installation
Quick Facts: Billings Window Replacement
Average Costs
- • Full installation: $400-1,050 per window
- • Double-pane: $350-680
- • Typical time: 2-3 weeks (winter weather delays)
Energy Requirements
- • Climate zone: IECC Zone 6B (Cold-Dry)
- • U-factor: U-0.30 or lower for residential windows
- • 15+ certified installers
Billings's Cold Semi-Arid Climate & Energy Needs
Summer Average
85°F (29°C)
Winter Average
25°F (-4°C)
Heating Days
7,000
Cooling Days
700
Climate Zone: IECC IECC Zone 6B (Cold-Dry)
Climate Challenges for Windows
- ▸Extreme cold winters (-30°F) require high-insulation windows
- ▸Wide temperature range (-30°F to 100°F) stresses seals
- ▸Low humidity accelerates seal degradation
- ▸Freeze/thaw cycles damage frames and seals
- ▸High heating costs drive energy-efficient upgrades
- ▸Limited local installer availability
Montana Energy Code Requirements
Energy Code
Montana adopts IECC 2018
U-Factor Requirement
Windows must meet U-0.30 or lower for residential windows maximum. Lower is better for insulation.
Solar Heat Gain (SHGC)
No specific SHGC requirement (cold climate) to reduce cooling costs.
Permits
Montana requires building permits for window replacement. Installer should handle permits and inspections.
Frequently Asked Questions
How much does window replacement cost in Billings?
Full installation: $400-1,050 per window per window. Double-pane glass: $350-680. Pricing depends on size, type, and energy ratings required by IECC Zone 6B (Cold-Dry).
What are common window problems in Billings?
- Severe condensation and frost in winter
- Seal failure from extreme temperature cycling
- Ice buildup on interior window surfaces
- Energy loss through single-pane windows (common in older homes)
Should I choose double-pane or triple-pane?
Triple-pane recommended for Billings's cold climate (7000 heating days). Cuts heating costs 20-30%.