Hi Mike,
We are very sorry to hear about this! Fabric life is affected by application, location and the physical elements the shelter is exposed to. All of our shelters include a minimum one year warranty and if your cover tears within that time period we suggest filing a claim and having that reviewed and possibly replaced by the corresponding department. We also offer many replacement cover options, including heavier materials that may have longer warranties and life expectancies which might better suit your needs. If you have any other questions or concerns please feel free to call us at 1-800-932-9344
http://www.shelterlogic.com/support/forms/warranty-claim/
Thank you