Sash Window Repair Sash windows can be out of balance and crack. Pam browses the internet for salvaged wavy glasses, and keeps an eye open for discarded sashweights made of metal. She then searches for replacements in the form of washers or nuts to ensure that her window is balanced. http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1218422