Kielstra Siding & Windows is a family-owned and operated business serving St. Thomas and Elgin County for over 60 years. They specialize in the installation of high-quality siding, eavestrough, windows, and doors. With a team of knowledgeable staff and friendly installers, they ensure that every job is done right and on time. They have built their reputation on personal referrals and repeat customers by delivering outstanding value and exceptional customer service.