What does entry door replacement cost in Blaine County, MT?

A fiberglass entry door replacement in Blaine County averages $1,500, with costs ranging from $800 for basic models to $3,000 for premium options with sidelights or decorative glass. The 1x services adjustment means local prices match national averages.

How long does exterior door installation take?

Installation time varies by door type. Entry doors require 3 to 5 hours of labor, sliding patio doors need 5 to 8 hours due to their complexity, and storm doors are the quickest at 1 to 2 hours. At $29.58 per hour for carpenter labor, this translates to $90 to $235 in direct labor costs.

Why is door energy efficiency so important in Blaine County?

Blaine County experiences 7,498 annual heating degree-days, roughly double the national median of 3,700 HDD. This heating-dominated climate (IECC Zone 6B) means doors with poor insulation or worn weatherstripping can significantly increase heating bills throughout the long winter season.

What door materials perform best in cold Montana winters?

Fiberglass and insulated steel doors outperform wood in thermal retention for Zone 6B climates. Look for doors with U-factors below 0.30 and weatherstripping rated for extreme cold. These materials resist warping from the freeze-thaw cycles indicated by Blaine County's 81.29 winter weather hazard score.

Should I finance or pay cash for door replacement?

For smaller projects like storm door installation ($300 to $800), cash payment avoids interest costs. For larger projects like sliding patio doors ($2,800 average), financing at current 6.36% rates adds roughly $17 monthly to a 30-year mortgage. Promotional 0% financing from contractors can eliminate interest if paid within 12 months.

How do hazard risks affect door material choices in Blaine County?

Winter weather (score 81.29) is the primary concern, causing freeze-thaw stress on frames and seals. Wildfire risk at 69.85 suggests considering fiberglass or steel over wood in areas near the wildland-urban interface. Hail risk is very low (28.18), so impact-resistant glazing is optional rather than essential.

What is the labor cost breakdown for door installation?

Labor accounts for roughly 60% of project cost, with materials comprising the remaining 40%. At national carpenter rates of $29.58 per hour, a 4-hour entry door installation runs about $120 in direct labor. Contractors add overhead and profit margins, so expect installed labor costs of $200 to $400 depending on complexity.

REGIONAL COST GUIDE · Blaine County, MT

How Much Does Exterior Door Replacement Cost in Blaine County, MT?

Entry door replacement in Blaine County, MT averages $1,500. Compare fiberglass, sliding patio, and storm door costs with local carpenter rates.

Cost range $800 – $3,000

Average $1,500

Updated May 17, 2026

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COST BREAKDOWN

What homeowners in Blaine County actually pay.

Local market ranges built from regional labor, materials, and permitting data — not national averages.

Entry Door Replacement (fiberglass)

$800 Avg: $1,500 $3,000

Sliding Patio Door Replacement

$1,500 Avg: $2,800 $4,500

Storm Door Installation

$300 Avg: $500 $800

National avg $1,500 × 1x local adjustment = $1,500

Why Blaine County prices look like this.

Compared to the national average, exterior door replacement in Blaine County costs about the same, with a 1x services adjustment factor reflecting local labor rates that match the national baseline. A fiberglass entry door replacement here averages $1,500, while sliding patio doors run around $2,800 and storm doors about $500. The county's median home value of $124,900 sits at roughly 72% of the national average, making major upgrades a proportionally larger investment for local homeowners. Door replacement projects in this region must account for IECC Climate Zone 6B conditions, where 7,498 annual heating degree-days demand excellent weatherstripping and insulation values. Proper installation becomes critical when winter temperatures plummet and heating costs climb.

Labor Costs for Door Installation

Carpenter wages for door installation average $29.58 per hour nationally, which serves as the baseline for Blaine County since local trade wage data is unavailable. This rate applies to the labor portion of your project (roughly 60% of total cost), while materials pass through at standard pricing. A fiberglass entry door installation requires 3 to 5 hours of labor, translating to $90 to $150 in direct labor costs before overhead and profit margins. Sliding patio door installations are more complex, often requiring 5 to 8 hours ($150 to $235 in labor). Storm door installations are the quickest, usually completed in 1 to 2 hours. When comparing quotes from contractors, ask them to itemize labor versus materials so you can evaluate the markup structure.

Environmental Hazards Affecting Exterior Doors

Blaine County's overall hazard risk score of 45.87 (Relatively Low) means exterior doors face moderate environmental stress. Winter weather scores 81.29 (Relatively Moderate), indicating regular exposure to snow, ice, and freeze-thaw cycles that can warp frames and compromise seals over time. Lightning risk also rates 80.12 (Relatively Moderate), though this primarily affects electrical systems rather than doors directly. Wildfire risk at 69.85 suggests fiberglass or steel doors may offer better fire resistance than wood in certain locations near the wildland-urban interface. Flood risk remains relatively low at 46.53, and hail at 28.18 (Very Low) means impact-resistant glazing is less critical here than in Great Plains storm corridors.

Climate Considerations for Door Selection

Blaine County sits in IECC Climate Zone 6B, a cold and dry region where heating dominates energy concerns. With 7,498 annual heating degree-days (roughly double the national median of 3,700 HDD), homes here run furnaces far more intensively than a typical U.S. household. Cooling demand is minimal at just 434 annual cooling degree-days. This heating-dominated climate makes door energy efficiency paramount: look for units with U-factors below 0.30 and proper weatherstripping rated for extreme cold. Fiberglass and insulated steel doors outperform wood in thermal retention. NOAA climate normals show average annual temperatures around 4.5°F with 3.7 inches of yearly snow, conditions that stress door seals and frames through repeated thermal cycling.

Energy Efficiency and Utility Savings

Montana electricity costs $0.133 per kWh as of February 2026, making energy-efficient doors a worthwhile investment in this heating-dominated climate. A poorly sealed door can leak significant heated air, forcing furnaces to work harder throughout the 7,498 HDD heating season. The payback calculation is straightforward: if an energy-efficient door saves $50 annually in heating costs, a $200 premium pays for itself in four years. Proper weatherstripping and insulated cores reduce infiltration losses substantially. For homeowners considering broader efficiency upgrades, Blaine County receives 4.59 peak sun hours daily, meaning a 6kW solar system would generate approximately 7,905 kWh annually, potentially offsetting electricity for supplemental heating systems or heat pumps.

Financing Your Door Replacement

With 30-year mortgage rates at 6.36% as of May 2026, financing door replacement through a home equity loan or HELOC may make sense for larger projects. Blaine County's median home value of $124,900 and median property taxes of $1,901 annually place it in a lower-cost tier (72% of national average home values). A $2,800 sliding patio door financed at current rates adds roughly $17 to monthly housing costs over 30 years. Cash payment remains most economical for smaller projects like storm door installation at $300 to $800. Some contractors offer promotional financing (12-month same-as-cash), which avoids interest charges if paid within the promotional window. Always compare total interest paid against available cash reserves.

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FREQUENTLY ASKED · 07

Questions buyers ask about exterior door replacement in Blaine County.

Short answers to the most common things we hear about local pricing, scope, and timing.

What does entry door replacement cost in Blaine County, MT?

A fiberglass entry door replacement in Blaine County averages $1,500, with costs ranging from $800 for basic models to $3,000 for premium options with sidelights or decorative glass. The 1x services adjustment means local prices match national averages.
How long does exterior door installation take?

Installation time varies by door type. Entry doors require 3 to 5 hours of labor, sliding patio doors need 5 to 8 hours due to their complexity, and storm doors are the quickest at 1 to 2 hours. At $29.58 per hour for carpenter labor, this translates to $90 to $235 in direct labor costs.
Why is door energy efficiency so important in Blaine County?

Blaine County experiences 7,498 annual heating degree-days, roughly double the national median of 3,700 HDD. This heating-dominated climate (IECC Zone 6B) means doors with poor insulation or worn weatherstripping can significantly increase heating bills throughout the long winter season.
What door materials perform best in cold Montana winters?

Fiberglass and insulated steel doors outperform wood in thermal retention for Zone 6B climates. Look for doors with U-factors below 0.30 and weatherstripping rated for extreme cold. These materials resist warping from the freeze-thaw cycles indicated by Blaine County's 81.29 winter weather hazard score.
Should I finance or pay cash for door replacement?

For smaller projects like storm door installation ($300 to $800), cash payment avoids interest costs. For larger projects like sliding patio doors ($2,800 average), financing at current 6.36% rates adds roughly $17 monthly to a 30-year mortgage. Promotional 0% financing from contractors can eliminate interest if paid within 12 months.
How do hazard risks affect door material choices in Blaine County?

Winter weather (score 81.29) is the primary concern, causing freeze-thaw stress on frames and seals. Wildfire risk at 69.85 suggests considering fiberglass or steel over wood in areas near the wildland-urban interface. Hail risk is very low (28.18), so impact-resistant glazing is optional rather than essential.
What is the labor cost breakdown for door installation?

Labor accounts for roughly 60% of project cost, with materials comprising the remaining 40%. At national carpenter rates of $29.58 per hour, a 4-hour entry door installation runs about $120 in direct labor. Contractors add overhead and profit margins, so expect installed labor costs of $200 to $400 depending on complexity.

SOURCES · 08

How these numbers were built.

Cost estimates are derived from government data including the U.S. Census Bureau (ACS), Bureau of Labor Statistics (OEWS), FEMA National Risk Index, EIA energy data, IECC climate zone classifications, Federal Reserve (FRED), and HUD Fair Market Rents.