How to Calculate Fiberglass Insulation by Square Foot

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Energy efficiency in a home can drastically reduce annual costs, and properly insulating the walls and roof of your home is one of the primary determinants of your home's efficiency. Fiberglass insulation is a common, cheap form of insulation used mainly in private residences and commercial businesses. It can be purchased in loose form and blown into a space, or in blanket form to be laid down as desired. Blanket form insulation can be purchased in several thicknesses, widths, and densities for use in varying situations.

Things You'll Need

  • Measuring Tape
  • Divide the insulated surfaces into rectangular sections. Measure the width and length of each section in inches. Divide each measurement by twelve to convert to feet.

  • Multiply the length and width for each section. This number is the square footage for each section.

  • Add the square footage of all the sections. This number is the total square footage of the insulated surfaces.

  • Multiply the total square footage by the cost per square foot of your chosen insulation. This number is the total cost to insulate the area.

References

  • Photo Credit Stockbyte/Stockbyte/Getty Images
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