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Insulation for 1500 Square Feet (R-30)

Insulating 1500 sq ft with R-30 fiberglass batts takes about 42 bags once you add 10% waste. R-13/R-15 suits 2×4 walls, R-30+ goes in ceilings — set yours below.

Batt bags
42 bags
Area
1,521 sq ftR-30 batts
Insulation to buy
1,674 sq ftincludes 10% waste
Batt bags
42 bags~40 sq ft per bag (check label)
Cost (est.)
$1,840~$1.10/sq ft for R-30
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Other sizes

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