Glass Breakage, and Seal Failure are both covered under Manufactures Warranty. This is a Limited Lifetime Warranty that is Pro-Rated based upon the age of the windows.
"Seal failure" is defined as a visible break or opening of the window's air seal, resulting in an ineffective sealing of the window, allowing moisture and/or air to penetrate, causing an internal fogging of the glass.
Replacement Window sashes will take from 4-6 weeks to be received from the Manufacturer. This will depend on both time of year, and complexity of the window.