I have wood rot on sashes of @10 Caradco clad double hung windows. They were installed when the house was built in 93. Jeld Wen sells a replacment sash with Auralast wood treatment with a 20 yr warranty. I'm wondering whether I should just replace the sashes or the whole window. Should I be concerned the alum clad that failed on the sashes is failing on other parts of the windows? I'd hate to replace sashes now & have other problems in a few yrs.