Winnipeg 204-900-0608
Garage Door R Values
Insulated doors for Calgary, Airdrie, Edmonton, and Winnipeg
R value measures resistance to heat transfer. Higher values deliver better insulation. Expect a warmer garage in winter, a cooler garage in summer, and less noise.
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What Is an R Value
R value is thermal resistance. It shows how well a garage door slows heat flow. Brochures often list section R value. Some brands list U factor for the whole door assembly.
Cold winters in Calgary, Airdrie, Edmonton, and Winnipeg reward higher R values. Comfort rises. Noise drops.
R Value Examples
Use these ranges to compare builds and insulation types.
R Value
Build and Insulation
Typical Door Example
R 0
Single layer steel, non insulated
Entry steel panel
R 2
Wood, no foam core
Basic wood panel
R ~6.5
Three layer steel, 1 3/8 in polystyrene
Clopay Classic 1 3/8 in polystyrene
R ~9
Three layer steel, 2 in polystyrene
Clopay Classic 2 in polystyrene
R ~12 to 12.9
Three layer steel, 1 3/8 in polyurethane
Garaga
R ~16 to 18.4
Three layer steel, 2 in polyurethane
Clopay Classic Intellicore R 18.4
R ~20
Three layer steel, 2+ in polyurethane
Premium insulated steel
R 6.5
Double layer 2” and triple layer 1 3/8 poly
Lincoln 2000 and Lincoln 3138, Clopay Classic 1 3/8
R 9-10
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Amarr Lincoln/Hillcrest 3000, Steelcraft T12
R 12-14
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Northlands 138 (Canadian Made), Amarr Olympus 3138
R 16-18
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Steecraft T16, Northlands 200, Clopay Classic Intellicore
R 19-20
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Amarr Olympus 3200
R-Value Reality Check
R Value
Amount of Heat Flow Reduction
Improvement in Energy Efficiency vs R-8 Insulation
R 8
90%
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R 12
93%
3%
R 16
95%
5%
R 20
96%
6%
R 32
97%
7%
How to Choose Your R Value
Pro tips:
- Polyurethane delivers higher R per inch than polystyrene.
- Air sealing Add new perimeter seals and a tight bottom seal.
- Quieter run Insulated doors feel stiffer and run quieter.
Detached
R 0 to R 6.5 for strength and low cost.Attached
R 6 to R 9 for a balanced choice.Workshop or Frequent Use
R 12 to R 12.9 for comfort and noise control.Heated Garage or Bedroom Above
R 16 to R 18.4 for top performance.