Rule Your Attic Tool
Investments in attic insulation will save you money on heating and cooling plus keep you comfortable. 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.
Does your attic insulation measure up?
Use this calculator to see how much insulation you may need, rebate amounts and payback period.