Many older homes will not have as much insulation as is currently recommended. In Central Iowa it is recommended that the attic have above a R38 rating. R-value indicates the resistance to heat transfer. The higher the R-value, the better. Cause: Inadequate insulation levels are an original construction issue. Placing objects on insulation compresses it reducing its effectiveness because the air is removed. The goal of insulation is to hold pockets of air still. Implicatio