Contact Rainbow Insulators Inc Today! Contact RainbowInsulators Inc Today! 608-836-1302 6223 Middleton Springs DrMiddleton, WI 53562 60 Mile Service Area Around Madison Wisconsin! We are a premier insulation contractor serving Middleton, Madison, Sun Prairie, and the rest of southern Wisconsin. If you are human, leave this field blank.Name *Address *Phone *MessageSubmitCaptcha *reCAPTCHA is required. We Are Proud to be a Member!