About Us

JE Berkowitz, LP is the premier high quality architectural glass fabricator in the United States. As an ISO 9001 certified company, we are committed to excellence and quality in the processing and distribution of glass products to our customers.

Contact Us

  • 1-800-257-78272
  • One Gateway Boulevard, Pedricktown, New Jersey

Insulating Glass

JEB Winduo™ Insulating Glass Units

JE Berkowitz’s Winduo™ Insulating Glass Units are two or more lites of glass separated and hermetically sealed to form a single-glazed unit with an air space between each lite (commonly called IG units). Winduo™ Insulating Glass Units conform to the highest level of the ASTM E2190 specifications.

Fabrication of Insulating Glass Units is accomplished on three automatic vertical insulating lines with the distinct advantages of:

  • On-line edge deletion to ensure proper sealant adhesion
  • On-line argon gas filling
  • Grey and Black primary and secondary sealants
  • Warm edge technology airspacers
  • Standard clear and black airspacers



Recommended Sizing

(Based on glass thickness)

3/16″ Annealed Glass 60″ x 96″
3/16″ Tempered Glass 70″ x 120″
1/4″ Annealed Glass 65″ x 110″
1/4″ Tempered Glass 96″ x 157″
1/4″ Laminated Annealed 36″ x 60″
3/8″ Laminated Annealed 70″ x 120″
9/16″ Heat-Treated Laminated 84″ x 144″
Minimum Size Units 12″ x 12″
Maximum Size Units 96″ x 157″

(*Consult JEB for applicable maximum glass sizes)