Need to know what closed cell insulationfoam costs by the sqare foot and one inch thickness for estimatimate?

Question

to establish a baseline if an estimate is fair as well as to compare with other bids

Answer 1

The price varies by region.  Try calling your local home center, such as Home Depot or Lowes and asking about pricing.

The panels are standard in size, and come in 4'x8' sheets (32 sq. ft)