We restore and improve the energy efficiency of original wood windows.

We combine the quality and architectural integrity of old wood windows with energy efficient tech, creating a product far superior to any new windows on the market today.

Slide to see the difference we can make.

If your design goal is to restore your historic wood windows with easy operation while meeting modern energy efficiency standards, you’ve come to the right place.

Your craftsmanship, upfront explanations and ability to come in and get things done were really great. we enjoyed the process of working with you to complete this restoration and hope we can work together in the future.


Rich Adamski and Sean O'Kane
Great Job. Truly professional. Restored windows kept charm of original 1960's building vs. being told by modern day window sales(man) keeping (original) windows "impossible".

Home Owner

Ann Bonci
CT Bi-Glass operates as any homeowner would wish. Prices up front, detailed explanation of the work, excellent communications and all work done on time as promised. Well done.

Home Owner

Rob Richards
Bi-Glass offered perfect suggestions during the design phase. Installation was efficient and true to plans. We felt an immediate impact that stopped heat loss. Esthetics were not compromised at all.

Home Owner

Nyle Davey
Meticulus –– Superb –– Outstanding! You did what you said -- when you said -- and as good or better than you said you would. Your crew -- Tom and Matt are -- TOP NOTCH!! Super Guys. Did the job as if they were working on their own homes! Neat -- Professional -- Pleasant -- Polite -- Efficient.

Home Owner

Albert and Mary