New for 2016, the fiberglass attic insulation project produced the top return on cost of any of the 30 projects in this year’s Cost vs. Value group. Our cost source, RemodelMAX, estimated the project would cost an average of $1,268 nationwide. Real estate professionals responding to our survey estimated that work would increase the price of a home at resale, within a year of the project’s completion, by $1,482. That’s a 116.9% return.

The project calls for a pro remodeler to air-seal a 35x30 attic floor to address any air leakage from conditioned space to unconditioned space. Then the pro would add fiberglass loosefill insulation, placing it on top of existing insulation if present. Fiberglass loosefill would be applied until thickness equating with R-30 insulation value is reached.