Alabama climate, wind & energy-code drivers
- ENERGY STAR climate zone: Southern — cooling-dominant, low SHGC priority (U ≤ 0.40, SHGC ≤ 0.25)
- IECC climate zone: 2A-3A
- Maximum U-factor: 0.4 (IECC 2021 + state amendments)
- Maximum SHGC: 0.25
- ASCE 7-22 design wind speed: 130 mph (Risk Category II)
- Hurricane impact-rated requirement: Mandatory ASTM E1996 large-missile impact-rated in coastal counties only
- Dominant residential frame material: Vinyl frame — dominant in most climates, lowest cost-per-window
- Historic-preservation overlay prevalence: Moderate — selected metro historic districts with review
- EPA RRP lead-safe trigger (pre-1978 housing share): Moderate — 20-40% pre-1978 housing share, EPA RRP required on selected replacements
Alabama licensing, lead-safe & permits
- License status: Statewide license required
- License board: Alabama Home Builders Licensure Board (HBLB) — Limited Specialty Construction credential for window installation (official site)
- Permit: city or county building permit required for window opening modification on new construction; HBLB residential builder license required above $10,000 contract; replacement-only same-size installs typically permit-exempt; Mobile and Baldwin coastal counties require ASTM E1996 large-missile impact-rated windows on every coastal residential install per Alabama Coastal Building Code
How window replacement costs vary in Alabama
State-specific code or insurance rule: Alabama Coastal Building Code (post-Hurricane-Ivan amendments) requires every Mobile and Baldwin coastal-county residential window installation to comply with ASTM E1996 large-missile impact resistance plus DASMA / AAMA NAFS performance grade rating at 130 mph design wind, and Alabama Code §34-14A makes the HBLB the only state body that licenses residential window contractors above the $10,000 threshold under a Limited Specialty Construction credential, plus Alabama Coastal Insurance Endorsement separately requires every Gulf coastal residential window-replacement insurance policy to specify impact-rated glazing for Wind Loss Mitigation premium discount eligibility.
Cities in Alabama
Compare window replacement pricing for 12 cities across Alabama.
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