Rule Your Attic Tool

Logo of Rule Your Attic by Energy StarDoes your attic insulation measure up?

Investments in attic insulation will save you money on heating and cooling plus keep you comfortable.  Measure up!Measure Attic Insulation Graphic

Use this calculator to see how much insulation you may need, rebate amounts and payback period.


Columbia Water & Light recommends having 18 inches of attic insulation (R-50). We will help finance your project with rebates and loans through our Home Performance with Energy Star program.

attic insulation cost 1,100 square feet (PDF)

attic insulation cost 1,650 square feet house (PDF)

attic insulation cost 2,500 square foot house (PDF)