Marcia and John Herman

John Herman has been recommending and installing windows since 1982, way back in the year Michael Jackson sold 20 million copies of “THRILLER”. Do you remember what you were doing back then? Well, John started visiting homeowners that year, and has met with thousands and thousands of homeowners in their homes, consulting with them about their window issues.

After over 30 years of meeting people in their homes, sitting down at their kitchen tables and helping them figure out the best solution to their window problems, John has learned a few things about windows. This blog attempts to share that accumulated knowledge with homeowners who are just now looking for answers about replacing their windows.

Over those many years, window materials have been improved on, and technology has been advanced to impressive levels. We hope this blog will be helpful to others as you read these pages, and contribute you own ideas and share your experiences and comments.

John, along with his wife and business partner Marcia, are the owners and operators of Thermal Sash Window and Door Systems Inc. located in Chester Springs, Pennsylvania. To view photos of some of the completed window jobs Thermal Sash has completed over the years, visit the ONLINE SHOWROOM.