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Insulation for 800 Square Feet (R-13)

Insulating 800 sq ft with R-13 fiberglass batts takes about 22 bags once you add 10% waste. R-13/R-15 suits 2×4 walls, R-30+ goes in ceilings — set yours below.

Batt bags
22 bags
Area
784 sq ftR-13 batts
Insulation to buy
863 sq ftincludes 10% waste
Batt bags
22 bags~40 sq ft per bag (check label)
Cost (est.)
$474~$0.55/sq ft for R-13
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Other sizes

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