It goes without saying that window sashes rot as a result of contact with water. The problem that lies to be answered when it comes to having them repaired or replaced is why? Why are the sashes rotting? In some instances, it may be due to exposure to rain water, however it may also be the fact that the flashing is trapping moisture, or the fact that rain is bouncing off the roof and onto the sash, or the top finishing nails may be leading to water exposure on the inside of the sash itself. The point being is that you will never be certain what the reason is unless you contact an expert. If you live within the Buffalo Grove area give us a call. We are able to provide our clients with long lasting solutions because our job is to not only repair or replace windows, but to evaluate and provide a remedy for the reasons why it became rotted in the first place.