Les Grumdahl Window & Siding

Reviews

• BR

  Blake Romenesko

  Jan 23, 2026
  5.0
  They were great! From seeing mixed reviews and hit pieces about Les Grumdahl, I had my doubts. I ultimately chose them because I wanted Marvin Infinity windows and their prices were quite reasonable compared to other quotes I got. They did not disappoint! From working around the historic details and quirks of my old house to my various customization requests, I couldn’t be more pleased. Tim was phenomenal to work with from beginning to end.
• JF

  Jenni Fowler

  Dec 5, 2025
  5.0
  Vince and Sofie were very knowledgeable about the windows. I really enjoyed their presentations. They were really good at what they did.
• MF

  Maggie Fink

  May 14, 2023
  5.0
  The Les Grumdahl staff have always been very approachable, quick to respond, responsible and professional in their work. We appreciate their window installation services very much and will call them again in the future when needed. Thank you!
• KR

  Kevin Rappana

  May 5, 2022
  5.0
  I have used Les and his crew many times and they have always done good work! They are always courteous and clean up after themselves. Very happy with their service and will use them again!
• SM

  Shaye Moris

  Nov 25, 2018
  5.0
  We had an exceptional experience. Ryan took the time to visit our site, answer our questions and address any concerns we had. Jamie and the rest of their installation staff were kind, respectable and on time. Our home is a contemporary style with many complicated and large windows. It was a breeze for Les Grumdahl! They also had great suggestions for new window types and framing. We love our new windows and doors and would highly recommend Les Grumdahl.