Here at Koch Building Products, making your home more comfortable is what we do best. We've been serving homeowners and businesses in the Sandusky, OH, area with replacement doors and windows, patio enclosures, and awnings since 1952.
If you’re interested in us helping with your next big project, give us a call to get started!

Door & Window Installations
Upgrading your home could be as easy as installing new windows or a door. We provide installations with custom products tailored to your unique tastes. Whether you’re putting in a new front door or need your windows replaced, Koch Building Products can find you a product that best suits your lifestyle and budget.

Patio Enclosures
Being in the outdoors is fun. Constantly being bothered by bugs? Not so much. We install patio enclosures allowing you to enjoy the outdoors while protecting you from insects.

Awnings
We create comfortable outdoor patio experiences with awning installation services. Simply give our team a call, and we will make an outdoor patio space where you can stay cool and enjoy life.
Commercial Doors and Products
Since 1989, we've been providing top-quality commercial doors and products through the assistance of a full-time welding and fabricating shop. We're proud to distribute Republic Hollow metal frames and doors and carry Chappell, Mohawk, and Algoma wood doors. We also offer a full line of door hardware and other items including:
- Closers, locks, and exit devices
- Kick plates, stops, flush bolts
- Full in-house keying-master keying
- Bathroom partitions
- Bathroom accessories, including, but not limited to: paper towel dispensers, toilet tissue dispensers, soap dispensers, mirrors, and grab bars.
- Custom-sized aluminum and fabric awnings