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About Us General Insulation was established in 1969 in Elgin, IL, by Larry Paulson. John Lange is the current owner of the business, since 2005. John has been installing insulation for 26 years, and is present at every job. The company is based in Palatine, IL, but serves the entire Northwest Suburbs of Chicagoland. Lange's General Insulation is a licensed and insured company. | |
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