Batt insulation coverage per bundle by R-value
Typical published planning values — NOT a certified design. Real performance depends on installation quality, framing / thermal bridging, moisture and settling; follow the product data sheet and your local energy code. Foam ignition/thermal-barrier, vapor/moisture control and combustion-air safety are set by the manufacturer and code — check with a professional.
A bundle of batts covers less area at a higher R (more material per square foot). The table below shows labeled coverage typicals in ft² per bundle by R — read the bag. Use it with the batt bundle calculator and the wall insulation calculator.
| R-value | Coverage per bundle (ft²) | Bundles per 1,000 ft² |
|---|---|---|
| R-13 | 88 ft²/bundle | 12 bundles |
| R-15 | 67 ft²/bundle | 15 bundles |
| R-19 | 75 ft²/bundle | 14 bundles |
| R-21 | 58 ft²/bundle | 18 bundles |
| R-30 | 58 ft²/bundle | 18 bundles |
| R-38 | 40 ft²/bundle | 25 bundles |
Labeled batt coverage typicals — coverage falls as R rises. Read the bag, and order a little extra (~5–10%) for framing, gaps and cut waste.