How do I know if it is time to replace my windows?

Jul 21, 2026

The clearest signs are drafts you can feel, condensation or fog between the panes, windows that stick or will not stay open, and rising heating bills. Visible rot, cracked frames, and water stains near the sill are red flags too. If your windows are 20 years or older and you are fighting Chicagoland winters every season, replacement usually pays off in both comfort and lower bills.

SEE WHAT OUR CUSTOMERS HAVE TO SAY
 I am very happy with the new windows McCann installed for us. They were able to install them quickly and did a very thorough job. Mark and Angel did a great job! I would highly recommend McCann to anyone looking to replace their windows. Thank you McCann! 
Miki
 I can only say good things about the people I dealt with with McCann, from Kevin, and Jim, and all the installers. They did a great job, their customer service was excellent, they were very clean, and I am as happy as can be. They were professional, and a pleasure to do business with. 
Ande F
 Just nice people all around. They know their stuff, have several quality options to choose from (less to more expensive), & didn’t pressure sell. Easy install, quality workmanship. Super satisfied with our experience. 
Patricia S
Top 500 Qualified Remodeler in 2023
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McCann Window & Exteriors

3375 Commercial Ave.
Northbrook, IL 60062
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847-562-1212