Historical projects require skill, experience, and a system that works every time. We have it down to a science.

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360 Prospect Street, New Haven, Connecticut

Marsh Hall

Yale University School of Forestry & Environmental Studies

Challenge: As a New Haven, CT Landmark Building no changes to the exterior of the building could be made. Because the building is an active educational facility it needed to be energy efficient and comfortable for its inhabitants. The old original windows were drafty and inefficient.

Result: The original windows were converted to double-pane insulated and weather stripped units maintaining the historical integrity of the building. As a result of this successful project numerous additional historically significant Yale buildings have had their windows converted using the Bi-Glass system.

1033 Prospect Avenue, West Hartford, CT

1033 Prospect

Cottage Style Stucco Brick Residence (circa 1906)

Challenge: Retain the original windows and achieve energy efficiency and proper operation of windows.

Result: All casement and double hung windows restored and double-pane Low-E glass installed. 28% savings in gallons of oil used each year. Half screens installed.

4 Manor Place, New Rochelle, NY

New Rochelle

Private residence (circa 1895)

Challenge: To maintain the original character and integrity of the original wood windows at a competitive price. Original windows were made from +/- 100 year old dense lumber compared to new windows made from +/- 10 year old new growth wood which will not last as long.

Result: All single pane deteriorated original windows repaired with epoxy consolidation techniques and converted to double-pane insulated and weather stripped units. Original windows now have same energy ratings as new quality double-pane wood replacement units. Price to convert using the Bi-Glass system was considerably less than quote for new Marvin window replacements.

The Bi-Glass system will allow you to enjoy your beautiful wooden windows like never before. Because now they are convenient, snug and functional as well as beautiful.

96 Wall Street, New Haven, CT

Stoeckel Hall

Yale University (circa 1897)

Challenge: The only example of Venetian style windows in New Haven County. Yale wanted to restore exterior of building and retain original windows.

Result: Original double-hung and casement windows restored, epoxy consolidated and converted to double-pane Low-E (Cardinal 272) glass.

129 E70th Street, NY, NY

E70th Street

NYC Brownstone (circa 1863)

Challenge: The oldest surviving house in the Upper East Side Historic District. Retain original look of the front windows. Required Landmark approval.

Result: 10 original arch top double-hung windows restored, epoxy consolidated, re-fit, weather stripped and double pane Low-E glass installed. Original windows now operate and are as energy efficient as new in kind windows at about 50% of the cost.

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