With over 30 years of serving homeowners, ThermaLast™ Founder John Kolbaska has learned how a job is done right – and unfortunately, he’s had to help clean up the mess when a job is done wrong.

Too often, homeowners find themselves victim to contractors who bait them with a superior product, but then short-change them on the installation process.

That will never happen with ThermaLast™ Windows. This is because the only contractors who are authorized to sell and install ThermaLast™ Windows are those who follow the Thermal Break 60 Installation System designed by John Kolbaska himself.

When you choose ThermaLast™, you know you’re not only getting a superior product, but a superior installation as well.