Estimate how much insulation you need for an older home while preserving wall cavities, vapor dynamics, and historic materials.
Home Details
Wall and Cavity Type
Balloon framing runs studs floor-to-roof with open cavities. Common pre-1940.
Dense-pack cellulose is the most recommended option for historic walls – it does not trap moisture.
Areas to Insulate
15% accounts for irregular cavities and access holes typical in older homes.