R-13 Insulation Price per Square Foot
R-13 fiberglass batt insulation costs about $0.65 per square foot for material — roughly $325 for a standard 500 sq ft room's worth of batts, before labor.
Indexed retail benchmark: $0.65 per square foot. Last updated: 2026-07-19.
Estimate Insulation Cost
Estimated Material Cost
$325.00
Calculated as: 500 sq ft × $0.65 per sq ft.
Understanding R-13 Batt Insulation Sizing & Costs
R-13 fiberglass batts are the standard thermal barrier specification for 2x4 exterior residential wall framing (spaced 16 or 24 inches on center). The cost of R-13 insulation rolls fluctuates based on regional production capacities and energy costs for glass smelting.
Our benchmark tracks retail prices for standard fiberglass kraft-faced insulation rolls, providing estimators with a reliable material planning baseline.