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.
• BG

  Brian Guenterberg

  Oct 26, 2025
  4.0
  They installed 12 Marvin Infinity replacement windows in our house, most of the windows. They did a good job and finished in less than a week, working every business day. The person who did the estimate (Tim) and the workers were friendly and courteous. They cleaned up well after themselves both inside and outside. The only issue we had is their timeline for starting the job, ours started months later than originally stated. My suggestion to Les Grumdahl employees is to over-estimate the time to start rather than under-estimating. Customers will be more happy if you show up earlier than expected rather than later.
• GW

  George Weller

  Sep 24, 2025
  5.0
  I couldn't be more satisfied with my choice of window, Marvin Infinity, and the perfect installation performed by the crew at Les Grumdahl Window & Siding. If you're looking for one of the best quality windows that money can buy, lol at the Marvin Infinity line. Fiberglass construction, coastal rated, Low E3.
• 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.