Home Improvement Contractor - Licensed Contractors

What is the R-value of contractor grade windows?

We have original windows put in by the builders in our 15 year-old home. We are not the original owners, so I have no idea what R-value windows were used. We are in central Maryland, if that makes a difference. Does anyone have any idea what the R-value would be? This is not a mansion, but a regular 1800 square foot home.

Public Comments

  1. R value of 1 pane of glass is aprox 1,not good
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