Frank Lloyd Wright loved windows. Probably no one understands this better than architect John Eifler. He has spent decades restoring Frank Lloyd Wright homes for clients. When he bought one for himself: the Ross House in Glencoe, Illinois, he knew he would be taking on his own major restoration project. One problem he would have to solve would be to improve window insulation for this older home.

frank lloyd wright house using Indow window inserts

The Ross House is located in a small 1915 subdivision of six homes planned by Wright’s attorney, Sherman Booth Jr. But most people knew it simply as “The Purple House” when Eifler bought it in 2011.

It had heavy lilac trim, and a number of problems. The house had stood vacant for three years. It had no heat and no running water. The exterior was covered in plastic stucco that didn’t let the house breathe. And there was a clear need to improve the window insulation.

Indow window inserts in Frank Lloyd house - insulation for older homes

The painstaking restoration was worth it. A final detail involved making the classic Wright patterned, single-pane leaded glass windows more energy efficient. Thankfully, Eifler had a lot of experience restoring and creating window insulation for older homes. Not wanting to cover them up with exterior storm windows, he bought 15 Indow window inserts and likes how they have insulated the windows for his home.



“They are working well and I like the look… they’re pretty invisible, and one can still see the exterior window sash, which is great. Our house is much less drafty and the geothermal furnace does not kick on as often, so it’s quieter. Glencoe is pretty quiet to begin with, but the commuter train isn’t too far away, and we barely hear it.”

– John Eifler, Architect, Chicago, Illinois.


close up of Indow window used for insulation for older homes

Edged in our patented Compression Tubing, the inserts press into the window frames without a damaging track or magnetic system. And that mattered to Eifler because he is particular about windows. He and his partner, Bonnie Phoenix, reconditioned all the windows in the Ross House themselves, taking the hinges off, laying them on a workbench, removing the glass and stripping the lead paint with a heat gun. Then he sanded and stained them.

inside Frank Lloyd Write home with Indow inserts which improve window insulation

He didn’t want to do anything to mar the iconic original windows and was glad he found a simple solution. “These are exciting properties,” he said of Frank Lloyd Wright homes. “He looked at things much differently than other people. He was sensitive to windows and having natural light and views.”

indow window insulation for older homes


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  woman installing indow window insert for noise reduction and energy efficiency