Des Plaines Replacement Windows, Siding and Doors Des Plaines, IL is a northern suburb of Chicago and adjacent to O’Hare International Airport – the second busiest airport in the world. There was a huge population boom in the 1930’s and again in the 1950’s which required many new houses to be built. Those houses are now over half a century old and their windows, siding and doors probably aren’t working properly. Feldco’s here to help you. We’ll replace your old windows, siding and doors with our energy efficient, affordable and durable products. It’s no wonder we’re the Midwest’s most trusted home improvement company.