Who is Integrated Windows System (IWS)?
IWS has created the industry’s first cast-in-place clerestory window system with glass included.
This system eliminates the need for additional formwork and glazing for tilt panels and ties directly into the buildings existing chamfers for seamless site lines.
Our team has over 60 years of experience installing pour-in-place windows into vertical concrete as a part of Monarch Materials Group Inc. We share leadership and deep expertise in windows and construction materials.
IWS delivers reliable and innovative window systems across the United States. Our team combines modern design with practical field experience with cast-in concrete products. We support contractors, architects, design-build firms, and developers on tilt-up projects. Our team tailors each system to the specific needs of every tilt-up project.
Why IWS?
Built Different, From the Ground Up
Built for Tilt-Up Construction
Our cast-in-place uPVC windows are engineered for tilt-up construction, integrating directly into concrete panels to eliminate framework, improve job-site safety, and help projects stay on schedule.
Save Time and Labor
IWS windows can save 3.5-4 labor hours on average per opening compared to traditional installation methods. Because the windows are installed before panel erection, buildings are immediately weathered in after tilt. This allows crews such as electrical contractors to come in 1-2 months earlier and accelerates the project timeline.
Support You Can Count On
We stay involved before, during, and after installation. From in-person support to ongoing communication, our team is committed to helping your project run smoothly from start to finish.
Reliable During Lifts
Our uPVC window systems are engineered for strength and durability, and our glass windows have never broken during a tilt. This proven performance gives contractors confidence during lifts.
Seamless Design Integration
Our windows are built to integrate cleanly into chamfer and façade details, supporting a cohesive architectural finish and sightlines without compromising performance.
Made in the USA
All IWS windows are manufactured in Adel, Iowa, ensuring consistent quality and dependable production.
